Terminal, base station, and wireless communication method

Abstract

This terminal includes a controller that performs a feedback control for transmitting two or more acknowledgments via one physical uplink control channel. When the two or more acknowledgments include a first acknowledgment having a first priority and a second acknowledgment having a second priority different from the first priority, the controller performs the feedback control using a resource related to a specific acknowledgment of one of the first acknowledgment and the second acknowledgment.

Description

Technical Field

[0001] The present disclosure relates to a terminal that executes wireless communication, a base station, and a wireless communication method, and particularly to a terminal, a base station, and a wireless communication method that execute communication related to an acknowledgment response.

Background Art

[0002] The 3rd Generation Partnership Project (3GPP) has standardized the 5th generation mobile communication system (also referred to as 5G, New Radio (NR), or Next Generation (NG)), and is further promoting the standardization of the next generation, which is called Beyond 5G, 5G Evolution, or 6G.

[0003] In Release 15 of 3GPP, multiplexing of two or more uplink channels (Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH)) transmitted in the same slot is supported.

[0004] Furthermore, in Release 17 of 3GPP, it was agreed to support multiplexing of Uplink Control Information (UCI) with different priorities on the PUCCH. For example, the UCI includes acknowledgment responses (Hybrid Automatic Repeat Request - ACK) with different priorities (for example, Non-Patent Document 1).

Prior Art Documents

Non-Patent Documents

[0005]

Non-Patent Document 1

Summary of the Invention

[0006] By the way, a mechanism (one-shot HARQ-ACK Feedback) is known in which two or more HARQ ACKs corresponding to each of two or more HARQ processes are transmitted from a terminal (UE (User Equipment)) to a network via one PUCCH (Physical Uplink Control Channel).

[0007] Under such circumstances, as a result of intensive studies, the inventors have found the necessity of devising a method for transmitting two or more HARQ-ACKs when assuming a case where two or more HARQ-ACKs having different priorities are transmitted in one-shot HARQ Feedback.

[0008] Therefore, in view of such a situation, when assuming a case where two or more HARQ-ACKs are transmitted via one PUCCH, the present invention aims to provide a terminal, a base station, and a wireless communication method capable of appropriately performing HARQ-ACK communication.

[0009] The gist of the present disclosure is a terminal including a control unit that executes feedback control for transmitting two or more acknowledgments via one physical uplink control channel, and when the two or more acknowledgments include a first acknowledgment having a first priority and a second acknowledgment having a second priority different from the first priority, the control unit executes the feedback control using a resource related to a specific acknowledgment of either the first acknowledgment or the second acknowledgment.

[0010] The present disclosure relates to a base station including a control unit that performs feedback control for receiving two or more acknowledgments via one physical uplink control channel. When the two or more acknowledgments include a first acknowledgment having a first priority and a second acknowledgment having a second priority different from the first priority, the control unit assumes the feedback control using resources related to a specific acknowledgment of either the first acknowledgment or the second acknowledgment. This is the gist of the present disclosure.

[0011] The present disclosure relates to a wireless communication method including step A of performing feedback control for transmitting two or more acknowledgments via one physical uplink control channel. When the two or more acknowledgments include a first acknowledgment having a first priority and a second acknowledgment having a second priority different from the first priority, step A includes a step of performing the feedback control using resources related to a specific acknowledgment of either the first acknowledgment or the second acknowledgment. This is the gist of the present disclosure.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 10

Mode for Carrying Out the Invention

[0013] Hereinafter, embodiments will be described with reference to the drawings. In addition, the same or similar reference numerals are assigned to the same functions and configurations, and the description thereof will be omitted as appropriate.

[0014] [Embodiment] (1) Overall Schematic Configuration of Wireless Communication System FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10 according to an embodiment. The wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20) and a terminal 200 (hereinafter, UE 200).

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

[0016] NG-RAN 20 includes a radio base station 100A (hereinafter, gNB 100A) and a radio base station 100B (hereinafter, gNB 100B). Note that the specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG. 1.

[0017] NG-RAN 20 actually includes a plurality of NG-RAN Nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that NG-RAN 20 and 5GC may be simply expressed as "network".

[0018] gNB100A and gNB100B are radio base stations compliant with 5G and perform wireless communication with UE200 in accordance with 5G. gNB100A, gNB100B, and UE200 can support Massive MIMO (Multiple-Input Multiple-Output) that generates a more directional beam BM by controlling radio signals transmitted from a plurality of antenna elements, carrier aggregation (CA) that bundles and uses a plurality of component carriers (CC), and dual connectivity (DC) that communicates with two or more transport blocks simultaneously between the UE and each of the two NG-RAN Nodes, etc.

[0019] Also, the wireless communication system 10 supports a plurality of frequency ranges (FR). FIG. 2 shows the frequency ranges used in the wireless communication system 10.

[0020] As shown in FIG. 2, the wireless communication system 10 supports FR1 and FR2. The frequency bands of each FR are as follows.

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

[0022] Note that SCS may be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to the interval between one sub-carrier in the frequency domain.

[0023] Furthermore, the wireless communication system 10 also supports frequency bands higher than the FR2 frequency band. Specifically, the wireless communication system 10 supports frequency bands exceeding 52.6 GHz and up to 114.25 GHz. Such high-frequency bands may be referred to as "FR2x" for convenience.

[0024] To solve such problems, when using a band exceeding 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) with a larger Sub-Carrier Spacing (SCS) may be applied.

[0025] Figure 3 shows a configuration example of a radio frame, sub-frame, and slot used in the wireless communication system 10.

[0026] As shown in Figure 3, one slot is composed of 14 symbols, and as the SCS increases (broadens), the symbol period (and slot period) becomes shorter. The SCS is not limited to the intervals (frequencies) shown in Figure 3. For example, 480 kHz, 960 kHz, etc. may be used.

[0027] Also, the number of symbols constituting one slot does not necessarily have to be 14 symbols (for example, 28, 56 symbols). Furthermore, the number of slots per sub-frame may vary depending on the SCS.

[0028] Note that the time direction (t) shown in Figure 3 may also be referred to as the time domain, symbol period, or symbol time, etc. Also, the frequency direction may also be referred to as the frequency domain, resource block, sub-carrier, bandwidth part (BWP), etc.

[0029] DMRS is a type of reference signal and is prepared for various channels. Here, unless otherwise specified, it may mean the DMRS for the downlink data channel, specifically, the PDSCH (Physical Downlink Shared Channel). However, the DMRS for the uplink data channel, specifically, the PUSCH (Physical Uplink Shared Channel) may also be interpreted in the same way as the DMRS for the PDSCH.

[0030] DMRS can be used for channel estimation in the UE200 as part of device, e.g., coherent demodulation. DMRS may exist only in the resource blocks (RBs) used for PDSCH transmission.

[0031] DMRS may have multiple mapping types. Specifically, DMRS has mapping type A and mapping type B. In mapping type A, the first DMRS is placed in the second or third symbol of the slot. In mapping type A, DMRS may be mapped based on the slot boundary regardless of where the actual data transmission starts in the slot. The reason the first DMRS is placed in the second or third symbol of the slot may be interpreted as to place the first DMRS after the control resource sets (CORESET).

[0032] In mapping type B, the first DMRS may be placed in the first symbol of the data allocation. That is, the position of DMRS may be given relative to where the data is placed rather than relative to the slot boundary.

[0033] Also, DMRS may have multiple types. Specifically, DMRS has Type 1 and Type 2. Type 1 and Type 2 differ in the mapping in the frequency domain and the maximum number of orthogonal reference signals. Type 1 can output up to 4 orthogonal signals with a single-symbol DMRS, and Type 2 can output up to 8 orthogonal signals with a double-symbol DMRS.

[0034] (2) Functional Block Configuration of the Wireless Communication System Next, the functional block configuration of the wireless communication system 10 will be described.

[0035] First, the functional block configuration of the UE200 will be described.

[0036] Figure 4 is a functional block configuration diagram of the UE200. As shown in Figure 4, the UE200 includes a wireless signal transceiver 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 transceiver 260, and a control unit 270.

[0037] The wireless signal transceiver 210 transmits and receives wireless signals according to NR. The wireless signal transceiver 210 supports Massive MIMO, CA that bundles multiple CCs for use, and DC that enables simultaneous communication between the UE and two NG-RAN Nodes respectively.

[0038] The amplifier unit 220 is composed of a PA (Power Amplifier) / LNA (Low Noise Amplifier), etc. The amplifier unit 220 amplifies the signal output from the modulation / demodulation unit 230 to a predetermined power level. Also, the amplifier unit 220 amplifies the RF signal output from the wireless signal transceiver 210.

[0039] The modulation / demodulation unit 230 performs data modulation / demodulation, transmission power setting, resource block allocation, etc. for each predetermined communication destination (gNB 100 or another gNB). In the modulation / demodulation unit 230, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) may be applied. Also, DFT-S-OFDM may be used not only for the uplink (UL) but also for the downlink (DL).

[0040] The control signal / reference signal processing unit 240 performs processing related to various control signals transmitted and received by the UE 200, and processing related to various reference signals transmitted and received by the UE 200.

[0041] Specifically, the control signal / reference signal processing unit 240 receives various control signals transmitted from the gNB 100 via a predetermined control channel, for example, control signals of the radio resource control layer (RRC). Also, the control signal / reference signal processing unit 240 transmits various control signals to the gNB 100 via a predetermined control channel.

[0042] The control signal / reference signal processing unit 240 performs processing using reference signals (RS) such as Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS).

[0043] DMRS is a reference signal (pilot signal) known between the base station for each terminal and the terminal for estimating the fading channel used for data demodulation. PTRS is a reference signal for each terminal for the purpose of estimating phase noise that becomes an issue in a high frequency band.

[0044] 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.

[0045] Also, the channels include a control channel and a data channel. The control channel includes Physical Downlink Control Channel (PDCCH), Physical Uplink Control Channel (PUCCH), Random Access Channel (RACH), Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI), and Physical Broadcast Channel (PBCH), etc.

[0046] Also, the data channel includes Physical Downlink Shared Channel (PDSCH), Physical Uplink Shared Channel (PUSCH), etc. Data means the data transmitted via the data channel. The data channel may be read as a shared channel.

[0047] Here, the control signal / reference signal processing unit 240 constitutes a receiving unit that receives downlink control information (DCI). DCI includes fields for storing, as existing fields, DCI Formats, Carrier indicator (CI), BWP indicator, FDRA (Frequency Domain Resource Allocation), TDRA (Time Domain Resource Allocation), MCS (Modulation and Coding Scheme), HPN (HARQ Process Number), NDI (New Data Indicator), RV (Redundancy Version), and the like.

[0048] The value stored in the DCI Format field is an information element that specifies the format of the DCI. The value stored in the CI field is an information element that specifies the CC to which the DCI is applied. The value stored in the BWP indicator field is an information element that specifies the BWP to which the DCI is applied. The BWP that can be specified by the BWP indicator is set by the 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 resources to which the DCI is applied. The frequency domain resources are specified by the value stored in the FDRA field and the 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 resources to which the DCI is applied. The time domain resources are specified by the value stored in the TDRA field and the information elements (pdsch-TimeDomainAllocationList, pusch-TimeDomainAllocationList) included in the RRC message. The time domain resources may be specified 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 is applied. The MCS is specified by the value stored in the MCS and the MCS table. The MCS table may be specified by the RRC message or may be specified by RNTI scrambling. The value stored in the HPN field is an information element that specifies the HARQ Process to which the DCI is applied. The value stored in the NDI is an information element for specifying whether the data to which the 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 the DCI is applied.

[0049] For each predetermined communication destination (gNB100 or another gNB), the encoding / decoding unit 250 performs data splitting / concatenation, channel coding / decoding, and the like.

[0050] 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.

[0051] 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 operations such as assembly / disassembly of PDU / SDU in a plurality of layers (such as Medium Access Control layer (MAC), Radio Link Control layer (RLC), and 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).

[0052] The control unit 270 controls each functional block constituting the UE 200. In an embodiment, the control unit 270 performs feedback control for transmitting two or more acknowledgments (HARQ-ACK) via one Physical Uplink Control Channel (PUCCH). Such feedback control may be referred to as One shot HARQ-ACK feedback or may be referred to as Type 3 HARQ-ACK feedback.

[0053] Here, when the control unit 270 includes a first acknowledgment (for example, HP HARQ-ACK) having a first priority (for example, High priority) and a second acknowledgment (for example, LP HARQ-ACK) having a second priority different from the first priority among two or more acknowledgments, the control unit 270 performs feedback control using resources related to a specific acknowledgment (hereinafter, specific HARQ-ACK) of either the first acknowledgment or the second acknowledgment.

[0054] Second, the functional block configuration of the gNB 100 will be described.

[0055] FIG. 5 is a functional block configuration diagram of gNB 100. As shown in FIG. 5, gNB 100 includes a receiving unit 110, a transmitting unit 120, and a control unit 130.

[0056] The receiving unit 110 receives various signals from the UE 200. The receiving unit 110 may receive UL signals via PUCCH or PUSCH.

[0057] The transmitting unit 120 transmits various signals to the UE 200. The transmitting unit 120 may transmit DL signals via PDCCH or PDSCH.

[0058] The control unit 130 controls gNB 100. In an embodiment, the control unit 130 performs feedback control for receiving two or more hybrid automatic repeat request acknowledgments (HARQ-ACKs) via one physical uplink control channel (PUCCH). When two or more HARQ-ACKs include a first HARQ-ACK (e.g., HP HARQ-ACK) having a first priority (e.g., High priority) and a second HARQ-ACK (e.g., LP HARQ-ACK) having a second priority different from the first priority, the control unit 130 assumes feedback control using resources for a specific HARQ-ACK of either the first HARQ-ACK or the second HARQ-ACK.

[0059] (3) Background Hereinafter, the background of the embodiment will be described. Although not particularly limited, in the embodiment, a plurality of SPS PDSCHs can be set as SPS (Semi-Persistent Scheduling) PDSCHs, and a case where the period of the SPS PDSCH is shortened may be assumed. In such a case, as the SPS PDSCH increases, UL transmissions canceled in the TDD pattern increase, and due to the decrease in HARQ-ACK transmission opportunities, the number of HARQ-ACKs that cannot be transmitted to the NG RAN 20 may increase. As a result, concerns such as an increase in delay and a decrease in reliability may arise.

[0060] In view of the above-described possibilities, consideration is being given to transmitting two or more HARQ-ACKs together by Type 3 HARQ-ACK feedback. In an embodiment, in such a background, attention is paid to feedback control regarding HARQ-ACKs having different priorities. Specifically, in the embodiment, attention is paid to cases where feedback control for both HARQ-ACKs having different priorities is required.

[0061] (4) Operation example 1 Hereinafter, the operation example of the above-described feedback control will be described. Hereinafter, a case where HP HARQ-ACK and LP HARQ ACK are mixed will be mainly described. In operation example 1, a case where HP HARQ-ACK and LP HARQ ACK are transmitted via one PUCCH is assumed when feedback control for both HP HARQ-ACK and LP HARQ ACK is required.

[0062] (4.1) Priority indicator field UE200 may execute feedback control based on an information element (here, Priority indicator) included in DCI that triggers the above-described feedback control.

[0063] For example, when the Priority indicator designates High priority, UE200 may execute feedback control using a resource regarding HP HARQ-ACK based on the setting regarding High priority. That is, a specific HARQ-ACK is HP HARQ-ACK.

[0064] The configuration related to high priority may be set by an RRC message (e.g., PUCCH-Config for HP HARQ-ACK). For example, UE200 may determine the timing of HARQ-ACK. The timing of HARQ-ACK may be determined on a slot basis or on a sub-slot basis. UE200 uses an HP PUCCH resource as the resource (hereinafter, HP HARQ-ACK PUCCH resource) used for transmitting the codebook for HP HARQ-ACK (hereinafter, HP HARQ-ACK CB). The HP PUCCH resource may be a resource in a case where HP PUCCH is multiplexed with PUSCH or the like.

[0065] On the other hand, when the Priority indicator designates low priority, UE200 may perform feedback control using a resource related to LP HARQ-ACK based on the configuration related to low priority. That is, a specific HARQ-ACK is LP HARQ-ACK.

[0066] The configuration related to low priority may be set by an RRC message (e.g., PUCCH-Config for LP HARQ-ACK). For example, UE200 may determine the timing of HARQ-ACK. The timing of HARQ-ACK may be determined on a slot basis or on a sub-slot basis. UE200 uses an LP PUCCH resource as the resource (hereinafter, LP HARQ-ACK PUCCH resource) used for transmitting the codebook for LP HARQ-ACK (hereinafter, LP HARQ-ACK CB). The LP PUCCH resource may be a resource in a case where LP PUCCH is multiplexed with PUSCH or the like.

[0067] (4.2) DCI format UE200 may perform feedback control based on the format of DCI that triggers the above-described feedback control.

[0068] For example, when the format of the DCI is DCI format 1_2, the UE 200 may perform feedback control using the resources related to HP HARQ-ACK based on the setting regarding High priority. That is, a specific HARQ-ACK is HP HARQ-ACK.

[0069] The setting regarding High priority may be set by an RRC message (for example, PUCCH-Config for HP HARQ-ACK). For example, the UE 200 may determine the timing of HARQ-ACK. The timing of HARQ-ACK may be determined on a slot basis or on a sub-slot basis. The UE 200 uses an HP PUCCH resource as the resource (HP HARQ-ACK PUCCH resource) used for transmitting the codebook (HP HARQ-ACK CB) for HP HARQ-ACK. The HP PUCCH resource may be a resource in a case where HP PUCCH is multiplexed with PUSCH or the like.

[0070] On the other hand, when the format of the DCI is DCI format 1_1, the UE 200 may perform feedback control using the resources related to LP HARQ-ACK based on the setting regarding Low priority. That is, a specific HARQ-ACK is LP HARQ-ACK.

[0071] The setting related to low priority may be set by an RRC message (e.g., PUCCH-Config for LP HARQ-ACK). For example, UE200 may determine the timing of HARQ-ACK. The timing of HARQ-ACK may be determined on a slot basis or on a sub-slot basis. UE200 uses the LP PUCCH resource as the resource (LP HARQ-ACK PUCCH resource) for transmitting the codebook for LP HARQ-ACK (LP HARQ-ACK CB). The LP PUCCH resource may be the resource in the case of multiplexing LP PUCCH with PUSCH or the like.

[0072] In such a case, the format of the DCI to which high priority is applied may be set by an RRC message or may be predefined in the radio communication system 10. Similarly, the format of the DCI to which low priority is applied may be set by an RRC message or may be predefined in the radio communication system 10.

[0073] (4.3) RRC Configuration UE200 may perform feedback control based on the setting related to radio resource control (RRC setting). Specifically, when feedback regarding HP HARQ-ACK and LP HARQ-ACK is required, a new RRC parameter may be introduced to specify which HARQ ACK of HP HARQ-ACK and LP HARQ-ACK should be used for performing feedback control. The new RRC parameter may be called PhysicalCellGroupConfig.

[0074] For example, when High priority is set by PhysicalCellGroupConfig, UE200 may perform feedback control using resources related to HP HARQ-ACK based on the settings related to High priority. That is, a specific HARQ-ACK is HP HARQ-ACK.

[0075] The settings related to High priority may be set by an RRC message (for example, PUCCH-Config for HP HARQ-ACK). For example, UE200 may determine the timing of HARQ-ACK. The timing of HARQ-ACK may be determined on a slot basis or on a sub-slot basis. UE200 uses an HP PUCCH resource as the resource (HP HARQ-ACK PUCCH resource) used for transmitting the codebook (HP HARQ-ACK CB) for HP HARQ-ACK. The HP PUCCH resource may be a resource in a case where HP PUCCH is multiplexed with PUSCH or the like.

[0076] On the other hand, when Low priority is set by PhysicalCellGroupConfig, UE200 may perform feedback control using resources related to LP HARQ-ACK based on the settings related to Low priority. That is, a specific HARQ-ACK is LP HARQ-ACK.

[0077] The setting related to low priority may be set by an RRC message (e.g., PUCCH-Config for LP HARQ-ACK). For example, UE200 may determine the timing of HARQ-ACK. The timing of HARQ-ACK may be defined on a slot basis or on a sub-slot basis. UE200 uses an LP PUCCH resource as a resource (LP HARQ-ACK PUCCH resource) for transmitting a codebook (LP HARQ-ACK CB) for LP HARQ-ACK. The LP PUCCH resource may be a resource in a case where LP PUCCH is multiplexed with PUSCH or the like.

[0078] (4.4) Predetermined definition UE200 may perform feedback control based on a predetermined definition in the radio communication system 10. That is, when feedback regarding HP HARQ-ACK and LP HARQ-ACK is requested, it may be determined which HARQ ACK (i.e., specific HARQ-ACK) of HP HARQ-ACK and LP HARQ-ACK should be used for performing feedback control using a resource.

[0079] (5) Operation example 2 Hereinafter, operation example 2 related to the embodiment will be described. Hereinafter, a case where HP HARQ-ACK and LP HARQ ACK are mixed will be mainly described. In operation example 2, a case where HARQ-ACK is transmitted via separate PUCCHs when feedback control for both HP HARQ-ACK and LP HARQ ACK is required is assumed.

[0080] In the following, a case where HARQ-ACK #0, HARQ-ACK #1, … HARQ-ACK #k, … HARQ-ACK #N exist as HARQ processes corresponding to Cell index #1 will be exemplified. HARQ-ACK #0 and HARQ-ACK #k are examples of HARQ processes corresponding to HP PDSCH, and HARQ-ACK #1 and HARQ-ACK #N are examples of HARQ processes corresponding to LP PDSCH.

[0081] (5.1) Operation Example 2-1 First, a case where feedback control regarding HP HARQ-ACK is executed will be described. Here, a case will be described where, based on an information element included in DCI (for example, PDSCH-to-HARQ_feedback timing indicator), it is determined that the PDSCH for which feedback control should be executed is HP PDSCH.

[0082] In such a case, as shown in FIG. 6, as the codebook of HARQ-ACK, HP HARQ-ACK CB is used. For HARQ processes (#0, #k, etc.) corresponding to HP PDSCH, ACK / NACK feedback control is executed as HP HARQ-ACK. On the other hand, for HARQ processes (#1, #N, etc.) corresponding to LP PDSCH, NACK feedback control is always executed as LP HARQ-ACK. That is, since LP HARQ-ACK is forcibly set to NACK, the feedback control of LP HARQ-ACK is not substantially performed. In other words, a specific HARQ-ACK may be considered as HP HARQ-ACK.

[0083] Second, a case where feedback control regarding LP HARQ-ACK is executed will be described. Here, a case will be described in which, based on an information element included in DCI (for example, PDSCH-to-HARQ_feedback timing indicator), it is determined that the PDSCH for which feedback control should be executed is an LP PDSCH.

[0084] In such a case, as shown in FIG. 7, as the codebook for HARQ-ACK, an LP HARQ-ACK CB is used. For the HARQ process (#1, #N, etc.) corresponding to the LP PDSCH, feedback control of ACK / NACK is executed as LP HARQ-ACK. On the other hand, for the HARQ process (#0, #k, etc.) corresponding to the HP PDSCH, feedback control of always NACK is executed as HP HARQ-ACK. That is, since HP HARQ-ACK is forcibly set to NACK, the feedback control of HP HARQ-ACK is not substantially performed. In other words, a specific HARQ-ACK may be considered as LP HARQ-ACK.

[0085] According to such a configuration, although the HARQ-ACK (non-specific HARQ-ACK) for which NACK is forcibly set is redundant, it is not necessary to change the size of the HARQ-ACK CB used in the existing Type 3 HARQ-ACK feedback. That is, the HARQ-ACK CB already defined in 3GPP Release 16 etc. can be reused.

[0086] (5.2) Operation Example 2-2 First, a case where feedback control regarding HP HARQ-ACK is executed will be described. Here, a case will be described in which, based on an information element included in DCI (for example, PDSCH-to-HARQ_feedback timing indicator), it is determined that the PDSCH for which feedback control is to be executed is HP PDSCH. That is, feedback control for both HP HARQ-ACK and LP HARQ ACK is required, but the specific HARQ-ACK is HP HARQ-ACK.

[0087] In such a case, as shown in FIG. 8, for HARQ processes (#0, #k, #n, etc.) corresponding to HP PDSCH, feedback control of HP HARQ-ACK is executed using the HP HARQ-ACK CB. On the other hand, for HARQ processes (#1, #N, etc.) corresponding to LP PDSCH, feedback control of LP HARQ-ACK is omitted (skipped). Therefore, the HP HARQ-ACK CB does not include bits (codes) for LP HARQ-ACK.

[0088] Second, a case where feedback control regarding LP HARQ-ACK is executed will be described. Here, a case will be described in which, based on an information element included in DCI (for example, PDSCH-to-HARQ_feedback timing indicator), it is determined that the PDSCH for which feedback control is to be executed is LP PDSCH. That is, feedback control for both HP HARQ-ACK and LP HARQ ACK is required, but the specific HARQ-ACK is LP HARQ-ACK.

[0089] In such a case, as shown in FIG. 9, for the HARQ processes (#1, #N, etc.) corresponding to the LP PDSCH, the feedback control of the LP HARQ-ACK is executed using the LP HARQ-ACK CB. On the other hand, for the HARQ processes (#0, #k, #n, etc.) corresponding to the HP PDSCH, the feedback control of the HP HARQ-ACK is omitted (skipped). Therefore, the LP HARQ-ACK CB does not include bits (codes) for the HP HARQ-ACK.

[0090] According to such a configuration, although it is necessary to dynamically change the sizes of the HP HARQ-ACK CB and the LP HARQ-ACK CB, there may be a difference in the recognition of the sizes of the HP HARQ-ACK CB and the LP HARQ-ACK CB between the gNB 100 and the UE 200. However, the redundancy (transmission of unspecified HARQ-ACK with NACK forcibly set) occurring in Operation Example 2-1 can be suppressed.

[0091] (6) Operations and Effects In the embodiment, when two or more HARQ ACKs include the HP HARQ-ACK and the LP HARQ-ACK, the UE 200 executes feedback control using the resources related to a specific HARQ-ACK of either the HP HARQ-ACK or the LP HARQ-ACK. According to such a configuration, even in the case of assuming a case of transmitting HARQ-ACKs with different priorities in the Type 3 HARQ-ACK feedback configured to transmit two or more HARQ-ACKs on one PUCCH, since the resources used in the Type 3 HARQ-ACK feedback are clear, the communication of the HARQ-ACK can be appropriately executed.

[0092] (7) Modification Example 1 Hereinafter, Modification Example 1 of the embodiment will be described. Hereinafter, the differences from the embodiment will be mainly described.

[0093] In the embodiment, a case where feedback control for both HP HARQ-ACK and LP HARQ ACK is required was exemplified on the premise of Type 3 HARQ-ACK feedback. In contrast, in Modification Example 1, a case where feedback control for either HP HARQ-ACK or LP HARQ ACK is required will be described on the premise of Type 3 HARQ-ACK feedback.

[0094] In Modification Example 1, since feedback control for either HP HARQ-ACK or LP HARQ ACK is required, the HARQ-ACK for which feedback control is required is the target HARQ. That is, UE200 performs feedback control assuming that the HARQ-ACK for which feedback control is required is the target HARQ. gNB100 assumes feedback control assuming that the HARQ-ACK for which feedback control is required is the target HARQ.

[0095] Regarding the resources related to feedback control, the operation examples 1, 2-1, or 2-2 described in the embodiment can be applied. Therefore, detailed description thereof will be omitted.

[0096] Although not particularly limited, in Modification Example 1, feedback control for HP HARQ-ACK may be required without feedback control for LP HARQ-ACK. According to such a configuration, in a case where a plurality of SPS PDSCHs can be set and it is necessary to transmit two or more HARQ ACKs together in a case where shortening of the period of the SPS PDSCH is attempted, by limiting only to the requirement for feedback control of HP HARQ-ACK, it is possible to reduce the resource overhead related to HARQ ACK.

[0097] (8) Other Embodiments Although the content of the present invention has been described in accordance with the embodiments, it is obvious to those skilled in the art that the present invention is not limited to these descriptions and various modifications and improvements are possible.

[0098] Although not particularly mentioned in the above-described embodiments, regarding which option such as Operation Example 1, Operation Example 2-1, and Operation Example 2-2 should be applied, it may be set by upper layer parameters or may be predefined in the wireless communication system 10.

[0099] Although not particularly mentioned in the above-described embodiments, ability information indicating whether the UE 200 corresponds to options such as Operation Example 1, Operation Example 2-1, and Operation Example 2-2 may be defined. The UE 200 may transmit the ability information to the NG RAN 20. The UE 200 may correspond to two or more options.

[0100] Although not particularly mentioned in the above-described embodiments, regarding which option such as Operation Example 1, Operation Example 2-1, and Operation Example 2-2 should be applied, it may be set based on upper layer parameters and the ability information of the UE 200.

[0101] Although not particularly mentioned in the above-described embodiments, ability information indicating whether the UE 200 corresponds to Type 3 HARQ-ACK feedback regarding HARQ-ACKs having different priorities may be defined. In Type 3 HARQ-ACK feedback, ability information indicating whether the UE 200 corresponds to the function of transmitting HARQ-ACKs having different priorities on one PUCCH may be defined. In Type 3 HARQ-ACK feedback, ability information indicating whether the UE 200 corresponds to the function of transmitting HARQ-ACKs having different priorities on separate PUCCHs may be defined. In Type 3 HARQ-ACK feedback, ability information indicating whether the UE 200 corresponds to the function of transmitting a HARQ-ACK having one priority on a PUCCH may be defined. The UE 200 may transmit the ability information to the NG RAN 20.

[0102] In the above-described embodiments, Type 3 HARQ-ACK feedback has been mainly described. However, the embodiments are not limited thereto. For example, the above-described operation example 1 may be applied to e-Type 2 HARQ-ACK feedback in a case where HARQ-ACKs having different priorities are transmitted via one PUCCH.

[0103] The block diagrams (FIGS. 4 and 5) used in the description of the above-described 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.

[0104] Functions include, but are not limited to, judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, regarded as, notification (broadcasting), notification (notifying), communication, forwarding, configuration, reconfiguration, allocation (allocating, mapping), assignment, etc. For example, a functional block (component) that functions as transmission is called a transmission unit or a transmitter. In any case, as described above, the realization method is not particularly limited.

[0105] Furthermore, the above-described gNB 100 and UE 200 (the device) may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 10 is a diagram showing an example of the hardware configuration of the device. As shown in FIG. 10, the device 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.

[0106] In the following description, the term "device" can be read as a circuit, a device, a unit, or the like. The hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without including some devices.

[0107] Each functional block of the device (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.

[0108] Also, each function in the device is realized by causing a processor 1001 to perform an operation by loading a predetermined software (program) onto hardware such as the processor 1001 and the memory 1002, and controlling communication by the communication device 1004 or controlling at least one of reading and writing data in the memory 1002 and the storage 1003.

[0109] The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.

[0110] Further, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. Further, the above various processes may be executed by one processor 1001, or may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

[0111] The memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. The memory 1002 may be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. capable of executing the method according to an embodiment of the present disclosure.

[0112] Storage 1003 is a computer-readable recording medium and may be composed of, for example, at least one of an optical disc such as a Compact Disc ROM (CD-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 recording medium may be, for example, a database, a server, or other appropriate media including at least one of the memory 1002 and the storage 1003.

[0113] 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.

[0114] 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).

[0115] 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).

[0116] 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.

[0117] Furthermore, the device may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), etc., and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0118] Also, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and other methods may be used. For example, the notification of information may be implemented 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 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, etc.

[0119] Each aspect / embodiment described in the present disclosure may be applicable to at least one of systems using Long Term Evolution (LTE), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New Radio (NR), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other suitable systems, and next-generation systems extended based on these. Further, multiple systems may be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).

[0120] 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, for 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.

[0121] Certain operations assumed to be performed by a 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.

[0122] Information, signals (such as information) can be output from an upper layer (or lower layer) to a lower layer (or upper layer). They may also be input and output via a plurality of network nodes.

[0123] The input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. The input and output information can be overwritten, updated, or appended. The output information may be deleted. The input information may be transmitted to other devices.

[0124] The determination may be made by a value represented by 1 bit (0 or 1), or by a Boolean value (true or false), or by a numerical comparison (for example, comparison with a predetermined value).

[0125] 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, by not performing the notification of the predetermined information).

[0126] Software should be broadly construed 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 referred to as software, firmware, middleware, microcode, hardware description language, or by any other name.

[0127] 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 cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (such as infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of the transmission medium.

[0128] 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.

[0129] Note that 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, cell, frequency carrier, etc.

[0130] The terms "system" and "network" used in this disclosure are used interchangeably.

[0131] Also, the information, parameters, etc. described in this disclosure may be represented using absolute values, relative values from a predetermined value, or using other corresponding information. For example, a radio resource may be indicated by an index.

[0132] The names used for the above-described parameters are not limiting names in any way. Furthermore, the 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 names, the various names assigned to these various channels and information elements are not limiting names in any way.

[0133] In this 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. can be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0134] A base station can accommodate one or a plurality (e.g., three) of cells (also called sectors). When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each of the smaller areas can also provide communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head: RRH)).

[0135] The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of a base station that provides communication services in this coverage and a base station subsystem.

[0136] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" may be used interchangeably.

[0137] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terms.

[0138] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving 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 operations. 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.

[0139] In addition, the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same). For example, for a configuration in which communication between the base station and the mobile station is replaced with communication between a plurality of mobile stations (which may be referred to as, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the base station may be configured as functions of the mobile station. Also, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0140] Similarly, the mobile station in the present disclosure may be read as a base station. In this case, the functions of the mobile station may be configured as functions of the base station.

[0141] The 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 referred to as a subframe.

[0142] The subframe may further be composed of one or more slots in the time domain. The subframe may have a fixed time length (for example, 1 ms) independent of numerology.

[0143] 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 the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the time domain, etc.

[0144] A slot may be composed of one or more symbols (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. A slot may be a time unit based on a numerology.

[0145] 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 Physical Downlink Shared Channel (PDSCH) (or Physical Uplink Shared Channel (PUSCH)) transmitted in a time unit larger than a mini-slot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called PDSCH (or PUSCH) mapping type B.

[0146] A radio frame, a sub-frame, a slot, a mini-slot, and a symbol all represent time units for transmitting signals. Different names corresponding to each of them may be used.

[0147] For example, one sub-frame may be called a Transmission Time Interval (TTI), or 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, or 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.

[0148] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in units of TTI. Note that the definition of TTI is not limited to this.

[0149] 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.

[0150] 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 for scheduling. Also, the number of slots (mini-slots) constituting the minimum time unit for the scheduling may be controlled.

[0151] 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 (partial or fractional TTI), shortened subframe, short subframe, mini-slot, sub-slot, slot, etc.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] Note that one or more RBs may be referred to as Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0156] 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.

[0157] 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 that BWP.

[0158] 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.

[0159] 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".

[0160] 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 within a TTI, symbol length, Cyclic Prefix (CP) length, etc. can be variously changed.

[0161] 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 "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed". As used in the present disclosure, two elements can be considered to be "connected" or "coupled" to each other using at least one of one or more electric wires, cables, and printed electrical connections, and also, as 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.

[0162] The reference signal can also be abbreviated as Reference Signal (RS) and may be called Pilot depending on the applied standard.

[0163] In the present disclosure, the description "based on" does not mean "only based on" unless otherwise specified. In other words, the description "based on" means both "only based on" and "at least based on".

[0164] In the configuration of each of the above devices, "means" may be replaced with "section", "circuit", "device", etc.

[0165] Any reference to an element using designations such as "first", "second", etc. used in the present disclosure does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Therefore, a reference to the first and second elements does not mean that only two elements can be employed there or that the first element must precede the second element in some form.

[0166] In the present disclosure, when terms such as "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.

[0167] In the present disclosure, for example, when articles are added by translation, such as a, an and the in English, the present disclosure may include that the nouns following these articles are in the plural form.

[0168] As used herein, the terms "determining" and "deciding" may encompass a wide variety of actions. "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), ascertaining, and considering something as having been "determined" or "decided". "Determining" and "deciding" may also include receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, accessing (e.g., accessing data in a memory), and considering something as having been "determined" or "decided". "Determining" and "deciding" may further include resolving, selecting, choosing, establishing, comparing, etc., and considering something as having been "determined" or "decided". That is, "determining" and "deciding" may include considering something as having been "determined" or "decided" through some action. Also, "determining (deciding)" may be read as "assuming", "expecting", "considering", etc.

[0169] As used herein, the term "A is different from B" may mean that "A is different from B". Note that the term may also mean that "A and B are each different from C". Terms such as "separated", "coupled", etc. may be interpreted in the same way as "different".

[0170] As described above in detail, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented in modified and changed forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not have any limiting meaning for the present disclosure.

Explanation of Signs

[0171] 10 Wireless communication system 20 NG-RAN 100 gNB 110 Receiver 120 Transmitter 130 Control unit 200 UE 210 Wireless signal transceiver 220 Amplifier unit 230 Modulation / demodulation unit 240 Control signal / reference signal processing unit 250 Encoding / decoding unit 260 Data transceiver 270 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

Claims

1. A receiving unit that receives downlink control information with priority display, which triggers feedback of two or more acknowledgment responses; A control unit that executes feedback control of the two or more acknowledgment responses via one physical uplink control channel; The terminal, wherein the control unit identifies resources of the one physical uplink control channel based on information included in the downlink control information.

2. The terminal according to claim 1, wherein the control unit executes the feedback control based on settings related to radio resource control.

3. The terminal according to claim 1, wherein the control unit executes the feedback control on a subslot basis based on settings related to radio resource control.

4. A communication system including a terminal and a base station, wherein the terminal has a receiving unit that receives downlink control information with priority display, which triggers feedback of two or more acknowledgment responses; has a control unit that executes feedback control of the two or more acknowledgment responses via one physical uplink control channel; The communication system, wherein the control unit identifies resources of the one physical uplink control channel based on information included in the downlink control information.

5. A receiving step of receiving downlink control information with priority display, which triggers feedback of two or more acknowledgment responses; A control step of executing feedback control of the two or more acknowledgment responses via one physical uplink control channel, including A wireless communication method for a terminal, wherein the control step identifies resources of the one physical uplink control channel based on information included in the downlink control information.

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