Communication equipment, base stations, communication methods, and integrated circuits

Abstract

Transmit the uplink control information appropriately. [Solution] The terminal includes a receiver that receives downlink control information (DCI) including uplink sharing channel (UL-SCH) instruction information and channel status information (CSI) request information; a transmitter that transmits acknowledgment (ACK) information which is part of the uplink control information (UCI); and a circuit that sets up a physical uplink sharing channel (PUSCH) based on the UL-SCH instruction information being set to 0 and the CSI request information being set to 0, wherein if the DCI enables semi-persistent CSI reporting on the PUSCH, the UL-SCH instruction information is set to 0 and the transmitter transmits the ACK information using the PUSCH.

Description

Technical Field

[0001] The present disclosure relates to a terminal, a communication method, and an integrated circuit.

Background Art

[0002] In 3GPP (3rd Generation Partnership Project), for the realization of the 5th generation mobile communication system (5G), the development of new radio access technology (NR: New Radio access technology) is in progress. In NR, in addition to high speed and large capacity, which are the basic requirements for enhanced Mobile Broadband (eMBB), functions to support Ultra Reliable and Low Latency Communication (URLLC) are mainly under consideration (see, for example, Non-Patent Documents 1-4).

[0003] In NR, a terminal (for example, called UE: User Equipment) transmits uplink control information (UCI: Uplink Control Information) to a base station (for example, called eNB: eNodeB or gNB). UCI includes, for example, a response signal (ACK / NACK: Acknowledgement / Negative Acknowledgement) indicating an error detection result of downlink data, channel state information (CSI: Channel State Information) of the downlink, or a scheduling request (SR: Scheduling Request) for uplink radio resource allocation.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

[0005] However, the method for transmitting uplink control information in NR has not been sufficiently considered.

[0006] Non-limiting embodiments of this disclosure contribute to the provision of a terminal, a communication method, and an integrated circuit capable of appropriately transmitting uplink control information. [Means for solving the problem]

[0007] A terminal according to one embodiment of the present disclosure comprises a receiver that receives first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information, wherein the first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted; and a transmitter that transmits the uplink control information using the resources of the uplink data channel when the first instruction information indicates that there is no transmission of the uplink data and the second instruction information indicates that there is no transmission of the channel status information.

[0008] A base station according to one embodiment of the present disclosure comprises a transmitter that transmits first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information, wherein the first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted; and a receiver that receives the uplink control information transmitted using the resources of the uplink data channel when the first instruction information indicates that there is no transmission of uplink data and the second instruction information indicates that there is no transmission of channel status information.

[0009] A communication method according to one embodiment of the present disclosure receives first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information. The first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted. If the first instruction information indicates that there is no transmission of uplink data and the second instruction information indicates that there is no transmission of channel status information, the communication method transmits the uplink control information using the resources of the uplink data channel.

[0010] A communication method according to one embodiment of the present disclosure transmits first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information, wherein the first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted, and if the first instruction information indicates that there is no transmission of uplink data and the second instruction information indicates that there is no transmission of channel status information, the communication method receives the uplink control information transmitted using the resources of the uplink data channel.

[0011] These comprehensive or specific embodiments may be implemented as systems, devices, methods, integrated circuits, computer programs, or recording media, or as any combination of systems, devices, methods, integrated circuits, computer programs, and recording media. [Effects of the Invention]

[0012] According to one embodiment of the present disclosure, uplink control information can be transmitted appropriately.

[0013] Further advantages and effects of one embodiment of this disclosure will be made apparent from the specification and drawings. Such advantages and / or effects are provided by several embodiments and features described in the specification and drawings, but not all of them are necessarily provided in order to obtain one or more identical features. [Brief explanation of the drawing]

[0014] [Figure 1] A diagram showing an example of the NR slot configuration. [Figure 2] A diagram showing an example of UCI transmission in PUSCH. [Figure 3] Block diagram showing a part of the configuration of the base station according to Embodiment 1 [Figure 4] Block diagram showing a part of the configuration of the terminal according to Embodiment 1 [Figure 5] Block diagram showing the configuration of the base station according to Embodiment 1 [Figure 6] Block diagram showing the configuration of the terminal according to Embodiment 1 [Figure 7] Sequence diagram showing the processing of the base station and the terminal according to Embodiment 1 [Figure 8] Diagram showing an example of ACK / NACK transmission according to Embodiment 1 [Figure 9] Diagram showing an example of CSI transmission according to Embodiment 1 [Figure 10] Diagram showing an example of ACK / NACK and CSI transmission according to Embodiment 1 [Figure 11] Diagram showing an example of UCI transmission according to the variation of Embodiment 1 [Figure 12] Diagram showing an example of UCI transmission according to the variation of Embodiment 1 [Figure 13] Diagram showing an example of UCI transmission in PUSCH [Figure 14] Diagram showing an example of UCI transmission in PUSCH [Figure 15] Diagram showing an example of UCI transmission according to Embodiment 2 [Figure 16] Diagram showing an example of UCI transmission in PUSCH [Figure 17] Diagram showing an example of UCI transmission in PUSCH [Figure 18] Diagram showing an example of UCI transmission in PUSCH [Figure 19] Diagram showing an example of UCI transmission according to Embodiment 3 [Figure 20] Diagram showing an example of UCI transmission according to Embodiment 3

Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0016] In NR, base stations communicate by allocating radio resources to terminals in time units called slots or mini-slots. Figure 1 shows an example of an NR slot configuration. One slot contains multiple OFDM (Orthogonal Frequency Division Multiplexing) symbols. For example, in NR, one slot contains 14 OFDM symbols. When allocating in mini-slot units, base stations allocate radio resources to terminals in time units shorter than a slot (e.g., 1, 2, 4, 7 symbols).

[0017] In NR, base stations allocate frequency domain radio resources to terminals. The smallest resource unit in the frequency domain is a resource element (RE), which has one subcarrier. Base stations allocate frequency domain radio resources to terminals using frequency units called resource blocks (RBs). In NR, for example, one RB contains 12 subcarriers.

[0018] When a terminal transmits UCI in a slot (or mini-slot) where no radio resources (hereinafter referred to as "PUSCH resources") for the uplink data channel (e.g., PUSCH: Physical Uplink Shared Channel) have been allocated, it transmits the UCI to the base station using the uplink control channel (e.g., PUCCH: Physical Uplink Control Channel).

[0019] The UCI transmitted using PUCCH includes, for example, ACK / NACK indicating the error detection result of downlink data, periodic CSI reports (P-CSI), semi-persistent CSI reports (SP-CSI), or SRs.

[0020] Furthermore, in NR, base stations use Downlink Control Information (DCI) to allocate PUSCH resources to terminals. For example, DCI formats 0-1 are used for allocating PUSCH resources (see, for example, Non-Patent Document 2).

[0021] DCI format 0-1 includes a UL-SCH indicator field. For example, if UL-SCH indicator=1 is notified, uplink data (UL-SCH: Uplink Shared Channel) is transmitted using PUSCH. On the other hand, if UL-SCH indicator=0 is notified, UL-SCH is not transmitted via PUSCH. In other words, the UL-SCH indicator is information indicating whether or not UL-SCH is transmitted via PUSCH.

[0022] Furthermore, DCI format 0-1 includes a CSI request field. The CSI request field is used by the base station to request the terminal to transmit a CSI using PUSCH. The CSI requested by the CSI request field and transmitted using PUSCH includes SP-CSI or aperiodic CSI reports (A-CSI). For example, if a non-zero value is indicated in the CSI request field, the CSI will be transmitted using PUSCH. On the other hand, if zero is indicated in the CSI request field, the base station has not requested the terminal to transmit a corresponding CSI report using PUSCH. In other words, the CSI request is instructional information indicating whether or not a CSI will be transmitted using PUSCH.

[0023] CSI reports in PUSCH can be transmitted in PUSCH, multiplexed with UL-SCH. In this case, the terminal is notified by DCI that UL-SCH indicator=1 and CSI request=non-zero.

[0024] Furthermore, a CSI report in PUSCH may be sent even if there is no UL-SCH transmission in PUSCH. In this case, the terminal is notified by DCI that UL-SCH indicator=0 and CSI request=non-zero.

[0025] Furthermore, the terminal can also transmit UL-SCH via PUSCH if there is no request for a CSI report from the base station. In this case, the terminal is notified by DCI that UL-SCH indicator=1 and CSI request=0.

[0026] As described above, the terminal transmits UCI and UL-SCH to the base station based on the relationship between the settings of the UL-SCH indicator field and the CSI request field, respectively, as determined by DCI. However, the relationship between the UL-SCH indicator field and the CSI request field described above is not perfect.

[0027] For example, in DCI, when UL-SCH indicator=0 and CSI request=0 are notified, that is, when there is no UL-SCH transmission in PUSCH and no request for CSI reporting from the base station, the operation of the terminal is unclear.

[0028] The following are some examples of problems that may arise as a result.

[0029] For example, a terminal that has been notified with UL-SCH indicator=0 and CSI request=0 cannot send UCI via PUSCH. For example, Figure 2 shows a case where a PUSCH resource that has been notified with UL-SCH indicator=0 and CSI request=0 is allocated in the same time resource (or a time resource that partially overlaps) as a slot (or mini-slot) allocated for sending UCI such as ACK / NACK for downlink data (e.g., PDSCH). In the case shown in Figure 2, the terminal may send UCI (e.g., ACK / NACK) via PUCCH instead of PUSCH.

[0030] However, the allocation of wireless resources for PUCCH (hereinafter referred to as "PUCCH resources") is operated semi-statically. With semi-static allocation of PUCCH resources, it is not possible to keep up with dynamic changes in channel state or requirements, which may result in inefficient use of wireless resources. For example, if the channel state of a semi-statically allocated PUCCH resource deteriorates due to channel fluctuations or inter-cell interference, the reception quality of the UCI transmitted by the terminal via PUCCH may deteriorate. Deterioration of UCI reception quality can affect system optimization and potentially lead to a decrease in system throughput.

[0031] Therefore, in one embodiment of this disclosure, a method for appropriately transmitting UCI from a terminal to a base station in NR will be described.

[0032] The following describes each embodiment in detail.

[0033] (Embodiment 1) [Overview of the communication system] Each embodiment of the communication system according to this disclosure comprises a base station 100 and a terminal 200.

[0034] Figure 3 is a block diagram showing some configurations of a base station 100 according to each embodiment of the present disclosure. In the base station 100 shown in Figure 3, the transmitting unit 114 transmits first control information (e.g., DCI) relating to an uplink data channel (e.g., PUSCH) and second control information relating to an uplink control channel (e.g., PUCCH) for transmitting uplink control information (e.g., UCI). The first control information includes first instruction information (e.g., UL-SCH indicator) indicating whether or not uplink data (e.g., UL-SCH) is being transmitted, and second instruction information (e.g., CSI request) indicating whether or not channel status information (CSI) is being transmitted. The receiving unit 116 receives uplink control information transmitted using the resources of the uplink data channel when the first instruction information indicates that there is no uplink data transmission and the second instruction information indicates that there is no channel status information transmission.

[0035] Figure 4 is a block diagram showing some of the configurations of terminal 200 according to each embodiment of the present disclosure. In the terminal 200 shown in Figure 4, the receiving unit 202 receives first control information (e.g., DCI) relating to an uplink data channel (e.g., PUSCH) and second control information relating to an uplink control channel (e.g., PUCCH) for transmitting uplink control information (e.g., UCI). The first control information includes first instruction information (e.g., UL-SCH indicator) indicating whether or not uplink data is being transmitted, and second instruction information (e.g., CSI request) indicating whether or not channel status information is being transmitted. The transmitting unit 220 transmits uplink control information using the resources of the uplink data channel if the first instruction information indicates that there is no uplink data being transmitted and the second instruction information indicates that there is no channel status information being transmitted.

[0036] [Base station configuration] Figure 5 is a block diagram showing the configuration of the base station 100 according to Embodiment 1 of this disclosure. In Figure 5, the base station 100 includes a control unit 101, a data generation unit 102, an encoding unit 103, a retransmission control unit 104, a modulation unit 105, a higher-level control signal generation unit 106, an encoding unit 107, a modulation unit 108, a downlink control signal generation unit 109, an encoding unit 110, a modulation unit 111, a signal allocation unit 112, an IFFT (Inverse Fast Fourier Transform) unit 113, a transmission unit 114, an antenna 115, a receiving unit 116, an FFT (Fast Fourier Transform) unit 117, an extraction unit 118, an ACK / NACK demodulation unit 119, a decoding unit 120, a determination unit 121, a CSI demodulation unit 122, a decoding unit 123, a determination unit 124, a UL-SCH demodulation unit 125, a decoding unit 126, and a determination unit 127.

[0037] The control unit 101 determines information related to the uplink transmission of the terminal 200 and outputs the determined information to the extraction unit 118.

[0038] Information regarding uplink transmissions from terminal 200 includes, for example, information regarding PUSCH resources or information regarding UCI transmissions. Information regarding PUSCH resources includes, for example, the presence or absence of UL-SCH (e.g., UL-SCH indicator), the presence or absence of A / SP-CSI requests (e.g., CSI request), the encoding and modulation method (e.g., MCS: Modulation and Coding Scheme) of the information transmitted in PUSCH (e.g., UL-SCH or UCI), and the allocation of radio resources for PUSCH. Information regarding UCI transmissions includes, for example, the encoding and modulation method (e.g., MCS) of the information transmitted in PUSCH (UCI), and information regarding PUSCH resources.

[0039] Furthermore, the control unit 101 determines which resources the terminal 200 will transmit UCI to and outputs the determined information to the extraction unit 118. For example, the control unit 101 determines which resources the terminal 200 will transmit UCI to based on information about PUCCH resources, information about PUSCH resources (e.g., UL-SCH indicator and CSI request information), or the temporal positional relationship between PUCCH resources and PUSCH resources. Details of how the terminal 200 determines which resources the terminal 200 will transmit UCI to will be described later.

[0040] Furthermore, the control unit 101 outputs information regarding the uplink transmission of the terminal 200 to the higher-level control signal generation unit 106 or the downlink control signal generation unit 109.

[0041] The information output to the higher-level control signal generation unit 106 includes, for example, information regarding PUCCH transmissions assigned to semi-static, or information regarding PUCCH resources.

[0042] On the other hand, the information output to the downlink control signal generation unit 109 includes, for example, the presence or absence of UL-SCH (e.g., UL-SCH indicator), notified by DCI (e.g., DCI format 0-1) for allocating PUSCH resources, the presence or absence of A / SP-CSI requests (e.g., CSI request), the encoding and modulation method of the information transmitted in PUSCH (e.g., MCS), and resource allocation. The information output to the downlink control signal generation unit 109 also includes information regarding PUCCH resources for transmitting ACK / NACK, notified by DCI (e.g., DCI format 1-0 or DCI format 1-1, etc.) for allocating radio resources for PDSCH (hereinafter referred to as "PDSCH resources").

[0043] Furthermore, the control unit 101 determines the allocation of wireless resources for the control signals of the upper layer (upper-layer control signals) or the downlink control signals for transmitting downlink control information, and for the downlink data signals, and outputs the determined information to the signal allocation unit 112.

[0044] The data generation unit 102 generates downlink data for the terminal 200 and outputs it to the encoding unit 103.

[0045] The encoding unit 103 performs error correction encoding on the downlink data input from the data generation unit 102 and outputs the encoded data signal to the retransmission control unit 104.

[0046] The retransmission control unit 104, upon initial transmission, retains the encoded data signal input from the encoding unit 103 and outputs it to the modulation unit 105. Furthermore, when the retransmission control unit 104 receives a NACK for the transmitted data signal from the determination unit 121 (described later), it outputs the corresponding retained data to the modulation unit 105. Conversely, when the retransmission control unit 104 receives an ACK for the transmitted data signal from the determination unit 121, it deletes the corresponding retained data.

[0047] The modulation unit 105 modulates the data signal input from the retransmission control unit 104 and outputs the modulated data signal to the signal assignment unit 112.

[0048] The higher-level control signal generation unit 106 generates a control information bit sequence (higher-level control signal) using the control information input from the control unit 101, and outputs the generated control information bit sequence to the encoding unit 107.

[0049] The encoding unit 107 performs error correction encoding on the control information bit sequence input from the higher-level control signal generation unit 106, and outputs the encoded control signal to the modulation unit 108.

[0050] The modulation unit 108 modulates the control signal input from the encoding unit 107 and outputs the modulated control signal to the signal assignment unit 112.

[0051] The downlink control signal generation unit 109 generates a control information bit sequence (downlink control signal, for example, DCI) using the control information input from the control unit 101, and outputs the generated control information bit sequence to the encoding unit 110. Since control information may be transmitted to multiple terminals, the downlink control signal generation unit 109 may also generate a bit sequence for each terminal that includes the terminal ID of each terminal.

[0052] The encoding unit 110 performs error correction encoding on the control information bit sequence input from the downlink control signal generation unit 109, and outputs the encoded control signal to the modulation unit 111.

[0053] The modulation unit 111 modulates the control signal input from the encoding unit 110 and outputs the modulated control signal to the signal assignment unit 112.

[0054] The signal assignment unit 112 maps the data signal input from the modulation unit 105, the higher-level control signal input from the modulation unit 108, or the downlink control signal input from the modulation unit 111 to the wireless resource based on the information indicating the wireless resource input from the control unit 101. The signal assignment unit 112 outputs the downlink signal to the IFFT unit 113.

[0055] The IFFT unit 113 performs transmission waveform generation processing, such as OFDM, on the signal input from the signal assignment unit 112. In the case of OFDM transmission that adds a CP (Cyclic Prefix), the IFFT unit 113 adds the CP (not shown). The IFFT unit 113 outputs the generated transmission waveform to the transmission unit 114.

[0056] The transmitting unit 114 performs RF (Radio Frequency) processing such as D / A (Digital-to-Analog) conversion and upconversion on the signal input from the IFFT unit 113, and transmits the wireless signal to the terminal 200 via the antenna 115.

[0057] The receiving unit 116 performs RF processing, such as down-conversion or A / D (Analog-to-Digital) conversion, on the uplink signal waveform received from the terminal 200 via the antenna 115, and outputs the processed uplink signal waveform to the FFT unit 117.

[0058] The FFT unit 117 performs an FFT (Fast-Fast Transform) process on the uplink signal waveform input from the receiving unit 116 to convert the time-domain signal into a frequency-domain signal. The FFT unit 117 outputs the frequency-domain signal obtained by the FFT process to the extraction unit 118.

[0059] The extraction unit 118 extracts the radio resource component transmitted as ACK / NACK, the radio resource component transmitted as CSI, or the radio resource component transmitted as UL-SCH from the signal input from the FFT unit 117, based on the information input from the control unit 101 (for example, information related to uplink transmission). The extraction unit 118 outputs the extracted ACK / NACK radio resource component to the ACK / NACK demodulation unit 119, the extracted CSI radio resource component to the CSI demodulation unit 122, and the extracted UL-SCH radio resource component to the UL-SCH demodulation unit 125.

[0060] The ACK / NACK demodulation unit 119 equalizes and demodulates the radio resource components corresponding to the ACK / NACK input from the extraction unit 118, and outputs the demodulation result to the decoding unit 120.

[0061] The decoding unit 120 uses the demodulation result input from the ACK / NACK demodulation unit 119 to perform error correction decoding of the signal corresponding to ACK / NACK, and outputs the decoded bit sequence to the determination unit 121.

[0062] The determination unit 121 determines, based on the bit sequence input from the decoding unit 120, whether the ACK / NACK transmitted from the terminal 200 indicates an ACK or a NACK for the transmitted data signal. The determination unit 121 outputs the determination result to the retransmission control unit 104.

[0063] The CSI demodulation unit 122 equalizes and demodulates the radio resource component corresponding to the CSI input from the extraction unit 118, and outputs the demodulation result to the decoding unit 123.

[0064] The decoding unit 123 uses the demodulation result input from the CSI demodulation unit 122 to perform error-corrected decoding of the signal corresponding to the CSI, and outputs the decoded bit sequence to the determination unit 124.

[0065] The determination unit 124 performs error detection on the bit sequence input from the decoding unit 123, and if no error is detected, it obtains the received CSI.

[0066] The UL-SCH demodulation unit 125 equalizes and demodulates the radio resource component corresponding to the UL-SCH input from the extraction unit 118, and outputs the demodulation result to the decoding unit 126.

[0067] The decoding unit 126 uses the demodulation result input from the UL-SCH demodulation unit 125 to perform error-corrected decoding of the signal corresponding to UL-SCH, and outputs the decoded bit sequence to the determination unit 127.

[0068] The determination unit 127 performs error detection on the bit sequence input from the decoding unit 126, and if no error is detected, it obtains the received data (in other words, the received UL-SCH). The determination unit 127 may also use the error detection result to generate an ACK / NACK for a retransmission request to the terminal 200 and output it to the retransmission control unit 104 (not shown).

[0069] [Device Configuration] Figure 6 is a block diagram showing the configuration of a terminal 200 according to Embodiment 1 of the present disclosure. In Figure 6, the terminal 200 includes an antenna 201, a receiving unit 202, an FFT unit 203, an extraction unit 204, a downlink control signal demodulation unit 205, a decoding unit 206, a higher-level control signal demodulation unit 207, a decoding unit 208, a data demodulation unit 209, a decoding unit 210, a control unit 211, encoding units 212, 214, 216, modulation units 213, 215, 217, a signal allocation unit 218, an IFFT unit 219, and a transmitting unit 220.

[0070] The receiving unit 202 performs RF processing, such as down-conversion or A / D (Analog-to-Digital) conversion, on the signal waveform of the downlink signal (data signal or control signal) received from the base station 100 via the antenna 201, and outputs the resulting received signal (baseband signal) to the FFT unit 203.

[0071] The FFT unit 203 performs an FFT (Fast-Fast Transform) operation on the signal (time-domain signal) input from the receiving unit 202 to convert the time-domain signal into a frequency-domain signal. The FFT unit 203 outputs the frequency-domain signal obtained by the FFT operation to the extraction unit 204.

[0072] The extraction unit 204 extracts a downlink control signal (e.g., DCI) from the signal input from the FFT unit 203 based on the control information input from the control unit 211 and outputs it to the downlink control signal demodulation unit 205. The extraction unit 204 also extracts a higher-level control signal and a downlink data signal based on the control information input from the control unit 211, outputs the higher-level control signal to the higher-level control signal demodulation unit 207, and outputs the downlink data signal to the data demodulation unit 209.

[0073] The downlink control signal demodulation unit 205 blind decodes the downlink control signal input from the extraction unit 204, and if it determines that the control signal is destined for terminal 200, it demodulates the control signal and outputs the demodulation result to the decoding unit 206.

[0074] The decoding unit 206 performs error correction decoding using the demodulation result input from the downlink control signal demodulation unit 205 to obtain control information. The decoding unit 206 outputs the obtained control information to the control unit 211.

[0075] The higher-level control signal demodulation unit 207 equalizes and demodulates the higher-level control signal input from the extraction unit 204, and outputs the demodulation result to the decoding unit 208.

[0076] The decoding unit 208 performs error correction decoding using the demodulation result input from the higher-level control signal demodulation unit 207 to obtain control information. The decoding unit 208 outputs the obtained control information to the control unit 211.

[0077] The data demodulation unit 209 equalizes and demodulates the downlink data signal input from the extraction unit 204, and outputs the decoding result to the decoding unit 210.

[0078] The decoding unit 210 performs error correction decoding using the demodulation results input from the data demodulation unit 209. The decoding unit 210 also performs error detection on the downlink data signal and outputs the error detection results to the control unit 211. Furthermore, the decoding unit 210 outputs downlink data that it has determined to be error-free as received data.

[0079] The control unit 211 calculates, for example, the encoding and modulation method (e.g., MCS) or radio resource allocation used for uplink transmission, based on the information regarding the uplink transmission of the terminal 200 included in the control information input from the decoding unit 206 or decoding unit 208, and outputs the calculated information to the encoding units 212, 214, 216, the modulation units 213, 215, 217, and the signal allocation unit 218, respectively. The control unit 211 also generates an ACK / NACK using the error detection result input from the decoding unit 210 and outputs it to the encoding unit 212.

[0080] Furthermore, the control unit 211 determines which resource the terminal 200 will use to transmit UCI (e.g., ACK / NACK or CSI) based on information about the PUCCH resource, information about the PUSCH resource (e.g., UL-SCH indicator, CSI request information), or the temporal positional relationship between the PUCCH resource and the PUSCH resource. The control unit 211 outputs information indicating the determined resource to the signal allocation unit 218.

[0081] Furthermore, the control unit 211 outputs to the extraction unit 204 information regarding the wireless resource of the downlink data signal or control signal, which is included in the control information input from the decoding unit 206 or decoding unit 208.

[0082] The encoding unit 212 performs error-corrected encoding on the ACK / NACK (bit sequence) input from the control unit 211, and outputs the encoded ACK / NACK (bit sequence) to the modulation unit 213.

[0083] The modulation unit 213 modulates the ACK / NACK input from the encoding unit 212 and outputs the modulated ACK / NACK (modulation symbol sequence) to the signal assignment unit 218.

[0084] The encoding unit 214 performs error-corrected encoding on the bit sequence corresponding to the input CSI and outputs the encoded CSI (bit sequence) to the modulation unit 215.

[0085] The modulation unit 215 modulates the CSI input from the encoding unit 214 and outputs the modulated CSI (modulation symbol sequence) to the signal assignment unit 218.

[0086] The encoding unit 216 performs error-corrected encoding on the incoming uplink data (UL-SCH) and outputs the encoded uplink data (bit sequence) to the modulation unit 217.

[0087] The modulation unit 217 modulates the uplink data input from the encoding unit 216 and outputs the modulated uplink data (modulation symbol sequence) to the signal assignment unit 218.

[0088] Furthermore, the encoding units 212, 214, and 216, and the modulation units 213, 215, and 217 perform encoding and modulation processing, respectively, based on control information (for example, encoding rate or modulation method) input from the control unit 211.

[0089] The signal assignment unit 218 maps the ACK / NACK input from the modulation unit 213, the CSI input from the modulation unit 215, or the uplink data input from the modulation unit 217 to the radio resources instructed by the control unit 211. The signal assignment unit 218 outputs the uplink signal with the mapped signal to the IFFT unit 219.

[0090] The IFFT unit 219 performs a transmission waveform generation process, such as OFDM, on the signal input from the signal assignment unit 218. In the case of OFDM transmission that adds a CP (Cyclic Prefix), the IFFT unit 219 adds the CP (not shown). Alternatively, if the IFFT unit 219 generates a single-carrier waveform, a DFT (Discrete Fourier Transform) unit may be added before the signal assignment unit 218 (not shown). The IFFT unit 219 outputs the generated transmission waveform to the transmission unit 220.

[0091] The transmitting unit 220 performs RF (Radio Frequency) processing such as D / A (Digital-to-Analog) conversion and upconversion on the signal input from the IFFT unit 219, and transmits the radio signal to the base station 100 via the antenna 201.

[0092] [Operation of base station 100 and terminal 200] The operation of the base station 100 and terminal 200 having the above configuration will be described in detail below.

[0093] Figure 7 shows the processing flow of the base station 100 and terminal 200 according to this embodiment.

[0094] The base station 100 transmits information about PUCCH, which is set to semi-static (for example, information about PUCCH transmission or information about PUCCH resources) to the terminal 200 (ST101). The terminal 200 receives the PUCCH information notified by the base station 100 (ST102).

[0095] The base station 100 transmits a DCI containing information about downlink data, and the corresponding downlink data, to the terminal 200 (ST103). The terminal 200, for example, obtains information about PUCCH resources for sending ACK / NACK based on the DCI notified by the base station 100 (ST104). The terminal 200 also obtains downlink data (PDSCH) based on information about PDSCH resources included in the DCI (ST105).

[0096] The base station 100 transmits control information (e.g., DCI) including information about PUSCH (e.g., UL-SCH indicator, CSI request, or resource allocation information) to the terminal 200 (ST106). The terminal 200 receives the information about PUSCH notified by the base station 100 (ST107).

[0097] Terminal 200 controls the operation related to UCI transmission (ST108). For example, terminal 200 determines the resource for transmitting UCI (e.g., PUCCH resource or PUSCH resource) based on the PUSCH information included in the DCI (e.g., UL-SCH indicator, CSI request, or PUSCH resource) and the PUCCH information set to semi-static (e.g., PUCCH resource). For example, in a DCI that assigns PUSCH, if UL-SCH indicator=0 and CSI request=0, terminal 200 determines the resource to be used for transmitting UCI to be the PUSCH resource assigned by that DCI.

[0098] Terminal 200 transmits the UCI to base station 100 using the determined resource (PUCCH resource or PUSCH resource) (ST109). Base station 100 receives the UCI transmitted from terminal 200 using the determined resource (ST110).

[0099] Note that in Figure 7, the order of processes ST103 to ST105 and processes ST106 to ST107 may be reversed.

[0100] Next, we will explain in detail how to control the operation related to UCI transmission in terminal 200 (for example, the processing of ST108 in Figure 7).

[0101] For example, base station 100 uses DCI to assign PUSCH and notifies terminal 200 that UL-SCH indicator=0 and CSI request=0.

[0102] If terminal 200 is assigned a PUSCH resource with UL-SCH indicator=0 and CSI request=0 set, and if that PUSCH resource and the PUCCH resource assigned for transmitting UCI overlap in time (or partially overlap), terminal 200 will transmit the UCI scheduled to be transmitted in the PUCCH resource using the PUSCH resource.

[0103] For example, when the base station 100 allocates a PUSCH resource that overlaps in time with a PUCCH resource for transmitting a UCI, it may set UL-SCH indicator=0 and CSI request=0 and notify the terminal 200 of the DCI for which the PUSCH resource will be allocated.

[0104] This allows terminal 200 to transmit UCIs to which PUCCH resources are allocated, using PUCCH resources in which neither UL-SCH nor CSI are transmitted.

[0105] The UCI that was scheduled to be transmitted on PUCCH included, for example, an ACK / NACK for downlink data and at least one of P-CSI / SP-CSI.

[0106] The following provides a detailed explanation of the operation examples of base station 100 and terminal 200 in accordance with the information contained in UCI.

[0107] [Example 1: When UCI only includes ACK / NACK for downlink data] If the UCI contains only ACK / NACK for downlink data, the base station 100 allocates a PUCCH resource to the terminal 200 to send ACK / NACK for downlink data.

[0108] A PUCCH resource for sending an ACK / NACK for downlink data may be notified semi-statically, for example, by a terminal-specific upper-layer notification. Alternatively, a terminal-specific upper-layer notification may notify a PUCCH resource set containing multiple (e.g., 8) PUCCH resources (candidates), and one of the PUCCH resources in the PUCCH resource set may be notified as a PUCCH resource for sending an ACK / NACK for downlink data by a PRI (PUCCH Resource Indicator) of the DCI (e.g., DCI format 1-0 or DCI format 1-1) that allocates the downlink data.

[0109] Furthermore, if the number of PUCCH resources in a PUCCH resource set is greater than the number of PUCCH resources that can be explicitly notified by PRI (for example, if PRI is 3 bits and there are more than 8 PUCCH resources in the PUCCH resource set), the PUCCH resources may be implicitly notified using the DCI's CCE (Control Channel Element) which allocates downlink data. For example, a one-to-one association may be established between the CCE and the PUCCH resources.

[0110] Furthermore, the base station 100 assigns a PUSCH resource to the terminal 200 by setting UL-SCH indicator=0 and CSI request=0 in the DCI (for example, DCI format 0-1) for assigning PUSCH. For example, the base station 100 may assign a PUSCH resource to the terminal 200 with UL-SCH indicator=0 and CSI request=0 set so that it overlaps temporally with the PUSCH resource for sending ACK / NACK.

[0111] For example, terminal 200 will send an ACK / NACK on PUCCH if the PUCCH resource for sending an ACK / NACK and the PUSCH resource allocated by DCI with UL-SCH indicator=0 and CSI request=0 set do not overlap in time. Terminal 200 will not send using the PUSCH resource allocated by DCI.

[0112] On the other hand, as shown in Figure 8, if the PUCCH resource allocated by DCI with UL-SCH indicator=0 and CSI request=0 overlaps in time, terminal 200 will use the PUCCH resource to send the ACK / NACK. In other words, terminal 200 will not send the ACK / NACK using the PUCCH resource allocated for sending the ACK / NACK.

[0113] [Example 2: When UCI includes only P-CSI or SP-CSI] If the UCI includes only P-CSI or SP-CSI (hereinafter collectively referred to as "P / SP-CSI"), the base station 100 allocates a PUCCH resource to the terminal 200 for transmitting P / SP-CSI.

[0114] The PUCCH resource for transmitting P / SP-CSI is notified semi-statically from base station 100 to terminal 200, for example, by terminal-specific upper-layer notifications.

[0115] Furthermore, the base station 100 assigns a PUSCH resource to the terminal 200 by setting UL-SCH indicator=0 and CSI request=0 in the DCI (for example, DCI format 0-1) for assigning PUSCH. For example, the base station 100 may assign a PUSCH resource to the terminal 200 with UL-SCH indicator=0 and CSI request=0 set so that it overlaps temporally with the PUSCH resource for transmitting P / SP-CSI.

[0116] For example, terminal 200 will send a P / SP-CSI on PUCCH if the PUCCH resource for sending a P / SP-CSI and the PUSCH resource allocated by DCI with UL-SCH indicator=0 and CSI request=0 set do not overlap in time. Terminal 200 will not send using the PUSCH resource.

[0117] On the other hand, as shown in Figure 9, terminal 200 will use the PUSCH resource to transmit P / SP-CSI if the PUSCH resource allocated by DCI with UL-SCH indicator=0 and CSI request=0 overlaps in time. In other words, terminal 200 will not transmit P / SP-CSI using the PUSCH resource allocated for transmitting P / SP-CSI.

[0118] In Example 2, the CSI transmitted by terminal 200 using the PUSCH resource may also be an A-CSI.

[0119] [Example 3: When UCI includes ACK / NACK for downlink data and P / SP-CSI] If the UCI includes ACK / NACK and P / SP-CSI, the base station 100 allocates a PUCCH resource to the terminal 200 for sending ACK / NACK and P / SP-CSI for downlink data.

[0120] PUCCH resources for sending ACK / NACK and P / SP-CSI for downlink data may be notified semi-statically, for example, by terminal-specific upper-layer notifications. Alternatively, a PUCCH resource set containing multiple (e.g., 8) PUCCH resources (candidates) may be notified by terminal-specific upper-layer notifications, and any of the PUCCH resources in the PUCCH resource set may be notified as the PUCCH resource for sending ACK / NACK and P / SP-CSI for downlink data by a PRI of the DCI (e.g., DCI format 1-0 or DCI format 1-1) that allocates the downlink data.

[0121] Furthermore, the base station 100 assigns a PUSCH resource to the terminal 200 by setting UL-SCH indicator=0 and CSI request=0 in the DCI (for example, DCI format 0-1) for assigning PUSCH. For example, the base station 100 may assign a PUSCH resource to the terminal 200 with UL-SCH indicator=0 and CSI request=0 set so that it overlaps temporally with the PUSCH resource for transmitting ACK / NACK and P / SP-CSI.

[0122] For example, terminal 200 will send ACK / NACK and P / SP-CSI on the PUCCH if the PUCCH resource for sending ACK / NACK and P / SP-CSI does not overlap in time with the PUCCH resource allocated by the DCI with UL-SCH indicator=0 and CSI request=0 set. Terminal 200 will not send using the PUCCH resource allocated by the DCI with UL-SCH indicator=0 and CSI request=0 set.

[0123] On the other hand, as shown in Figure 10, if the PUCCH resource allocated by DCI with UL-SCH indicator=0 and CSI request=0 overlaps in time, terminal 200 will use the PUCCH resource to send ACK / NCK and P / SP-CSI. In other words, terminal 200 will not send ACK / NCK and P / SP-CSI using the PUCCH resource allocated for sending ACK / NACK and P / SP-CSI.

[0124] The above describes examples of the operation of base station 100 and terminal 200 in accordance with the information contained in UCI.

[0125] Thus, in this embodiment, the base station 100 allocates a PUSCH resource to the terminal 200 using a DCI with UL-SCH indicator=0 and CSI request=0 set. Furthermore, if the PUSCH resource allocated to the terminal 200 for transmitting UCI overlaps in time with the PUSCH resource allocated by the DCI with UL-SCH indicator=0 and CSI request=0 set, the terminal 200 transmits the UCI using the PUSCH resource allocated by the DCI.

[0126] As described above, PUCCH resources are allocated semi-statically, while PUSCH resources are allocated dynamically. Therefore, base station 100 can dynamically allocate PUSCH resources for transmitting UCI, for example, in response to changes in the channel state between base station 100 and terminal 200. This allows terminal 200 to transmit UCI using PUSCH resources allocated according to the channel state, even if the channel state of the PUCCH resources deteriorates due to channel fluctuations or inter-cell interference.

[0127] Based on the above, according to this embodiment, terminal 200 can transmit UCI appropriately. For example, according to this embodiment, the reception quality of UCI at base station 100 can be improved, and the utilization efficiency of uplink resources can be improved.

[0128] Furthermore, in this embodiment, terminal 200 transmits UCI, which would normally be transmitted using a PUCCH resource, using a PUSCH resource notified by DCI with UL-SCH indicator=0 and CSI request=0 set, that is, a PUSCH resource from which UL-SCH or CSI is not transmitted. As a result, base station 100 can appropriately control the operation of terminal 200 (for example, transmission of UL-SCH or UCI) according to the relationship between the UL-SCH indicator and CSI request notified in DCI.

[0129] (Variation 1 of Embodiment 1) Once base station 100 semi-statically requests terminal 200 to transmit a P / SP-CSI, terminal 200 will continue to transmit P / SP-CSIs periodically or semi-permanently until the next opportunity for semi-static notification arises. Therefore, base station 100 cannot dynamically control the transmission of P / SP-CSIs from terminal 200. However, base station 100 may not need the P / SP-CSIs transmitted from terminal 200.

[0130] Therefore, in the variation of Embodiment 1, if the UCI includes at least P / SP-CSI, terminal 200 drops the transmission of P / SP-CSI when UL-SCH indicator=0 and CSI request=0 are notified in the DCI, as shown in Figure 11. In other words, as shown in Figure 11, terminal 200 does not perform transmission using the PUCCH resource and the PUSCH resource if the PUCCH resource and the PUSCH resource for transmitting P / SP-CSI overlap in time.

[0131] Note that Figure 11 shows an example where the UCI includes only P / SP-CSI, as shown in Figure 8. However, the same applies when the UCI includes ACK / NACK and P / SP-CSI, as shown in Figure 9. For example, if terminal 200 is notified of UL-SCH indicator=0 and CSI request=0 in DCI, it should drop the P / SP-CSI transmission as shown in Figure 12. In other words, terminal 200 drops the P / SP-CSI transmission as shown in Figure 12 and sends an ACK / NACK using the PUSCH resource.

[0132] This makes it possible to temporarily stop the transmission of P / SP-CSI from terminal 200, thereby improving the resource utilization efficiency of the uplink. Also, if the UCI includes ACK / NACK and P / SP-CSI, dropping the transmission of P / SP-CSI increases the resources allocated to ACK / NACK, thus improving the reception quality of ACK / NACK.

[0133] (Embodiment 2) This embodiment describes the case in which Carrier Aggregation (CA) is applied to a terminal.

[0134] Since the base station and terminal according to this embodiment share the same basic configuration as the base station 100 and terminal 200 according to Embodiment 1, they will be explained with reference to Figures 5 and 6.

[0135] In the case of CA, base station 100 can set up multiple CCs (Component Carriers, sometimes called "carriers" or "cells") for terminal 200 and assign PUSCH to each CC.

[0136] In this case, if the PUCCH resources for sending UCIs between multiple CCs overlap in time, terminal 200 multiplexes the UCI on the PUSCH of the CC with the smallest CC index (or CC number; for example, ServCellIndex) among the multiple CCs (see, for example, Non-Patent Document 3).

[0137] Furthermore, regardless of whether it is CA or non-CA, if multiple PUSCHs are assigned to the same CC, and the PUSCH resource transmitting the UCI overlaps in time with those multiple PUSCHs, terminal 200 multiplexes the UCI onto the PUSCH that starts transmitting earliest in time (in other words, the PUSCH with the smallest symbol index that starts PUSCH transmission) (see, for example, Non-Patent Document 3).

[0138] Furthermore, when a PUSCH is assigned to each of multiple CCs, or when multiple PUSCHs are assigned within the same CC, the DCI to which each PUSCH is assigned has the UL-SCH indicator field and the CSI request field set.

[0139] However, the relationship between the settings of the UL-SCH indicator field and CSI request field in multiple CCs and the operation of terminal 200 remains unclear.

[0140] The following are some examples of problems that may arise as a result.

[0141] For example, as shown in Figure 13, assume that a PUSCH resource is allocated with UL-SCH indicator=1 and CSI request=0 set for CC index 0 (CC#0), and UL-SCH indicator=0 and CSI request=0 set for CC index 1 (CC#1).

[0142] In this case, according to the UCI multiplexing method in the multiple CCs described above, if the PUCCH resource for transmitting the UCI overlaps in time with the PUSCH resource, the UCI is multiplexed with the PUSCH of CC#0 (the CC with the smallest CC index) at CC index 0. Therefore, in Figure 13, even though PUSCH is assigned to CC#1 at CC index 1, terminal 200 cannot use the PUSCH of CC#1. Also, as shown in Figure 13, when terminal 200 transmits UL-SCH using the PUSCH of CC#0 (in other words, when UL-SCH indicator=1), a portion of the PUSCH resource at CC#0 is used for UCI transmission, which may degrade the reception quality of UL-SCH.

[0143] Here, as a method to prevent the degradation of UL-SCH reception quality explained in Figure 13, for example, one can set UL-SCH indicator=0 in CC#0 and UL-SCH indicator=1 in CC#1, as shown in Figure 14. In the case of Figure 14, terminal 200 can transmit UL-SCH without UCI multiplexing using the PUSCH resource of CC#1.

[0144] However, as shown in Figure 14, in CC#0, PUSCH is assigned with UL-SCH indicator=0 and CSI request=0 set, so terminal 200 cannot transmit UCI via PUSCH. Therefore, in Figure 14, terminal 200 transmits UCI via PUSCH in CC#0 (in other words, a resource operated semi-statically), which means it cannot keep up with dynamic changes in channel status or request conditions, and there is a risk that the quality of UCI reception will deteriorate.

[0145] Therefore, in this embodiment, as shown in Figure 15, if the UL-SCH indicator field and the CSI request field are set in each of the multiple CCs, and a PUSCH resource with CSI request=0 is assigned to all CCs, and the assigned PUSCH resource and the PUCCH resource assigned to transmit the UCI overlap in time (or partially overlap), then terminal 200 transmits the UCI that is scheduled to be transmitted via PUCCH using the PUSCH resource.

[0146] Here, the UCI to be transmitted in PUCCH includes, for example, at least an ACK / NACK for downlink data and either a P-CSI or an SP-CSI.

[0147] Furthermore, as shown in Figure 15, terminal 200 multiplexes the UCI to the PUSCH of the CC (CC#1 in Figure 15) that has UL-SCH indicator=0 set, among the multiple CCs set on terminal 200. In other words, terminal 200 transmits the UCI using the PUSCH resource allocated by the DCI with UL-SCH indicator=0 and CSI request=0 set, similar to Embodiment 1.

[0148] In Figure 15, terminal 200 transmits UL-SCH (uplink data) using the PUSCH resource of CC#0, which is set to UL-SCH indicator=1 and CSI request=0, and transmits UCI (for example, at least one of ACK / NACK and P / SP-CSI) using the PUSCH resource of CC#1, which is also set to UL-SCH indicator=0 and CSI request=0.

[0149] Thus, according to this embodiment, the terminal 200 can avoid multiplexing of UCI to the PUSCH (PUSCH resource CC#0 in Figure 15) that transmits UL-SCH, thereby preventing deterioration of UL-SCH reception quality. Furthermore, according to this embodiment, similar to Embodiment 1, the base station 100 can dynamically allocate PUSCH resources for transmitting UCI (PUSCH resource CC#1 in Figure 15) in response to changes in channel status, etc. Therefore, the reception quality of UCI at the base station 100 can be improved, and the utilization efficiency of uplink resources can be improved.

[0150] If there are multiple CCs with UL-SCH indicator=0 set, terminal 200 may, for example, multiplex the UCI on the PUSCH of the CC with the smallest CC index among the multiple CCs with UL-SCH indicator=0 set. Note that the CC to which the PUSCH resource used for transmitting the UCI is allocated is not limited to the CC with the smallest CC index, but may be any other CC.

[0151] Furthermore, if UL-SCH indicator=1 is set for all of the multiple CCs, terminal 200 may multiplex the UCI into the PUSCH transmitted in the CC with the smallest CC index, for example, similar to the method described in Non-Patent Document 3. Note that the CC to which the PUSCH resource used for transmitting the UCI is allocated is not limited to the CC with the smallest CC index, but may be any other CC.

[0152] Furthermore, if multiple PUSCHs are assigned within the same CC, and the PUSCH resource transmitting the UCI overlaps in time with those multiple PUSCHs, terminal 200 may multiplex the UCI on the PUSCH in the CC where UL-SCH indicator=0 is set that starts transmitting earliest (in other words, the PUSCH with the smaller symbol index that starts PUSCH transmission). Note that the PUSCH used to transmit the UCI is not limited to the PUSCH that starts transmitting earliest, but may be any other PUSCH.

[0153] (Embodiment 3) This embodiment describes a case where, when CA is applied to a terminal, the base station requests A / SP-CSI from terminal 200 using the CSI request field.

[0154] Since the base station and terminal according to this embodiment share the same basic configuration as the base station 100 and terminal 200 according to Embodiment 1, they will be explained with reference to Figures 5 and 6.

[0155] NR does not assume that terminal 200 will receive two or more CSI requests within the same slot. Therefore, in CA, when PUSCH is assigned to each of multiple CCs, if base station 100 requests that a CSI be transmitted using PUSCH, it is thought that the CSI request for one CC will be set to non-zero, and the remaining CCs will have CSI request=0.

[0156] However, the relationship between the settings of the UL-SCH indicator field and CSI request field between multiple CCs in this case and the operation of terminal 200 remains unclear.

[0157] The following are some examples of problems that may arise as a result.

[0158] For example, as shown in Figure 16, suppose a PUSCH resource is allocated with UL-SCH indicator=0 and CSI request=0 set for CC index 0 (CC#0), and UL-SCH indicator=1 and CSI request=1 set for CC index 1 (CC#1).

[0159] In this case, a simple method is for terminal 200 to multiplex the A / SP-CSI requested in CC#1 to the PUSCH of CC#1 and transmit it, as shown in Figure 16.

[0160] However, in the case of Figure 16, even though PUSCH is assigned to CC#0, terminal 200 cannot use PUSCH in CC#0. Also, as shown in Figure 16, terminal 200 transmits UL-SCH using PUSCH in CC#1, whereas in CC#1, a portion of the PUSCH resources are used for UCI transmission, which may degrade the reception quality of UL-SCH.

[0161] Here, as a method to prevent the degradation of UL-SCH reception quality as explained in Figure 16, for example, one could set UL-SCH indicator=0 and CSI request=1 in CC#0, and UL-SCH indicator=1 and CSI request=0 in CC#1, as shown in Figure 17. In the case of Figure 17, terminal 200 can transmit UL-SCH without UCI multiplexing using the PUSCH resource of CC#1, and transmit A / SP-CSI using the PUSCH resource of CC#0.

[0162] However, in NR, as shown in Figure 18, if the PUSCH resource for transmitting A / SP-CSI overlaps temporally with the PUSCH resource for transmitting ACK / NACK or SR, terminal 200 drops the PUSCH that transmits A / SP-CSI without UL-SCH (see, for example, Non-Patent Document 3). Therefore, in Figure 18, terminal 200 cannot transmit A / SP-CSI.

[0163] Furthermore, as shown in Figure 18, ACK / NACK or SR is multiplexed and transmitted via the PUSCH of CC#1. Therefore, in Figure 18, a portion of the PUSCH resources is used for transmitting ACK / NACK or SR, which may degrade the reception quality of UL-SCH.

[0164] Therefore, this embodiment describes a method for appropriately transmitting A / SP-CSI (in other words, the CSI requested by the CSI request) and ACK / NACK or SR (in other words, the UCI assigned to PUCCH) without degrading the reception quality of UL-SCH.

[0165] For example, as shown in Figure 19, let's assume that a PUSCH resource is allocated with UL-SCH indicator=0 and CSI request=0 set for CC index 0 (CC#0), and UL-SCH indicator=1 and CSI request=1 set for CC index 1 (CC#1), similar to Figure 16.

[0166] As shown in Figure 19, if the UL-SCH indicator field and the CSI request field are set in each of the multiple CCs, and a CSI request is made, terminal 200 multiplexes and transmits A / SP-CSI to the PUSCH of CC#0, which has UL-SCH indicator=0 set.

[0167] Furthermore, as shown in Figure 19, if the PUSCH resource on which A / SP-CSI is multiplexed overlaps (or partially overlaps) with the PUSCH resource for sending ACK / NACK (or SR), terminal 200 multiplexes the ACK / NACK (or SR) onto the PUSCH of CC#0, which has UL-SCH indicator=0 set, and transmits it. In other words, terminal 200 transmits UCI using the PUSCH resource allocated by DCI, which has UL-SCH indicator=0 and CSI request=0 set, similar to Embodiment 1.

[0168] Therefore, in Figure 19, terminal 200 uses the PUSCH resource of CC#0 to multiplex and transmit ACK / NACK (or SR) and A / SP-CSI, and uses the PUSCH resource of CC#1 to transmit UL-SCH.

[0169] Thus, according to this embodiment, the multiplexing of UCI (e.g., ACK / NACK or A / SP-CSI, etc.) to the PUSCH from which the terminal 200 transmits UL-SCH can be avoided, thereby preventing deterioration of the UL-SCH reception quality. Furthermore, according to this embodiment, similar to Embodiment 1, the base station 100 can dynamically allocate PUSCH resources for transmitting UCI (PUSCH resources of CC#0 in Figure 19) in response to changes in channel status, etc. Therefore, the UCI reception quality at the base station 100 can be improved, and the utilization efficiency of uplink resources can be improved.

[0170] In this embodiment, the settings for the UL-SCH indicator and CSI request are not limited to those shown in Figure 19. For example, as shown in Figure 20, assume that a PUSCH resource is allocated with UL-SCH indicator=0 and CSI request=1 set for CC index 0 (CC#0), and UL-SCH indicator=1 and CSI request=0 set for CC index 1 (CC#1).

[0171] Even in the case of Figure 20, terminal 200 may multiplex and transmit A / SP-CSI to the PUSCH of CC#0, where UL-SCH indicator=0 is set. Furthermore, as shown in Figure 20, if the PUSCH resource to which A / SP-CSI is multiplexed overlaps (or partially overlaps) with the resource to which the PUSCH transmitting ACK / NACK (and SR) is assigned, terminal 200 multiplexes and transmits ACK / NACK (and SR) to the PUSCH of CC, where UL-SCH indicator=0 is set. Therefore, in Figure 20, terminal 200, as in Figure 19, multiplexes and transmits ACK / NACK (and SR) and A / SP-CSI using the PUSCH resource of CC#0, and transmits UL-SCH using the PUSCH resource of CC#1. Thus, even in the case of Figure 20, the reception quality of UCI at base station 100 can be improved, and the utilization efficiency of uplink resources can be improved.

[0172] If there are multiple CCs with UL-SCH indicator=0 set, terminal 200 may, for example, multiplex the UCI on the PUSCH of the CC with the smallest CC index among the multiple CCs with UL-SCH indicator=0 set. Note that the CC to which the PUSCH resource used for transmitting the UCI is allocated is not limited to the CC with the smallest CC index, but may be any other CC.

[0173] Furthermore, if UL-SCH indicator=1 is set for all of the multiple CCs, terminal 200 may multiplex the UCI into the PUSCH sent in the CC with the smallest CC index, for example, similar to the method described in Non-Patent Document 3. Alternatively, terminal 200 may multiplex the UCI into the PUSCH sent in the CC where the CSI request is set to a non-zero value. Note that the CC to which the PUSCH resource used for sending the UCI is allocated is not limited to the CC with the smallest CC index, but may be any other CC.

[0174] Furthermore, if multiple PUSCHs are assigned within the same CC, and the PUSCH resource transmitting the UCI overlaps in time with these multiple PUSCHs, terminal 200 may multiplex the UCI on the PUSCH in the CC where UL-SCH indicator=0 is set that starts transmitting earliest (in other words, the PUSCH with the smaller symbol index that starts PUSCH transmission). Note that the PUSCH used to transmit the UCI is not limited to the PUSCH that starts transmitting earliest, but may be any other PUSCH.

[0175] (Embodiment 4) In embodiments 1 to 3 described above, the notification in PUSCH when there is no UL-SCH transmission and no request for CSI reporting from the base station was explained, specifically the case where UL-SCH indicator=0 and CSI request=0 are notified in DCI.

[0176] However, in the case of PUSCH, if there is no UL-SCH transmission and no request for a CSI report from the base station, notification is not limited to the DCI settings described above.

[0177] This embodiment describes alternative notification methods in DCI when there is no UL-SCH transmission in PUSCH and no request for CSI reporting from the base station.

[0178] Since the base station and terminal according to this embodiment share the same basic configuration as the base station 100 and terminal 200 according to Embodiment 1, they will be explained with reference to Figures 5 and 6.

[0179] For example, the CSI request field included in DCI format 0-1 can also notify (in other words, trigger) a base station to monitor an aperiodic reference signal (A-CSI, e.g., a reference signal for CSI measurement) for beamforming control. Alternatively, the CSI request field can also notify (in other words, trigger) a base station to monitor an aperiodic reference signal for channel tracking.

[0180] In this case, the terminal is notified of reportQuantity=none in a terminal-specific higher-layer signal. Here, reportQuantity, a parameter of the higher layer, is instruction information that indicates the information to actually send when the terminal is requested to send a CSI via the CSI request field.

[0181] In this case, if DCI notifies UL-SCH indicator=0 and CSI request=non-zero, and CSI request=non-zero corresponds to reportQuantity, and reportQuantity=none is set in the higher layer signal, the terminal determines in PUSCH that there is no UL-SCH transmission and no request for CSI reporting from the base station.

[0182] In this case, for example, if a PUSCH resource is allocated in the same time resource (or a time resource that partially overlaps) as a slot (or mini-slot) allocated for sending UCI such as ACK / NACK for downlink data (e.g., PDSCH), and UL-SCH indicator=0 and CSI request=non-zero are notified, and reportQuantity=none is set, the terminal may choose to send UCI (e.g., ACK / NACK) via PUCCH instead of PUSCH.

[0183] However, the allocation of wireless resources for PUCCH (PUCCH resources) is operated semi-statically. With semi-static PUCCH resource allocation, it is not possible to keep up with dynamic changes in channel state or requirements, which may result in inefficient use of wireless resources. For example, if the channel state of a semi-statically allocated PUCCH resource deteriorates due to channel fluctuations or inter-cell interference, the reception quality of the UCI transmitted by the terminal over PUCCH may deteriorate. Deterioration of UCI reception quality can affect system optimization and lead to a decrease in system throughput.

[0184] Therefore, in this embodiment, if a PUSCH resource is assigned to terminal 200 with UL-SCH indicator=0, CSI request=non-zero, and reportQuantity=none, and if the PUSCH resource and the PUCCH resource assigned to transmit UCI overlap in time (or partially overlap), terminal 200 transmits the UCI scheduled to be transmitted in the PUCCH resource using the PUSCH resource.

[0185] As described above, PUCCH resources are allocated semi-statically, while PUSCH resources are allocated dynamically. Therefore, the base station 100 can dynamically allocate PUSCH resources for transmitting UCI, as in Embodiment 1, in response to changes in the channel state between the base station 100 and the terminal 200. This improves the reception quality of UCI at the base station 100 and improves the utilization efficiency of uplink resources.

[0186] Based on the above, according to this embodiment, terminal 200 can transmit UCI appropriately. For example, according to this embodiment, the reception quality of UCI at base station 100 can be improved.

[0187] In this embodiment, the UCI may include either ACK / NACK or P / SP-CSI for downlink data, or it may include both ACK / NACK and P / SP-CSI for downlink data.

[0188] (Embodiment 5) Since the base station and terminal according to this embodiment share the same basic configuration as the base station 100 and terminal 200 according to Embodiment 1, they will be explained with reference to Figures 5 and 6.

[0189] In this embodiment, if the UCI includes at least P / SP-CSI, terminal 200 drops the transmission of P / SP-CSI if a PUSCH resource is assigned with UL-SCH indicator=0, CSI request=non-zero, and reportQuantity=none, and if the PUSCH resource and the PUCCH resource assigned to transmit the UCI overlap in time (or partially overlap).

[0190] On the other hand, if the downlink data includes an ACK / NACK, the terminal 200, similar to the operation in Embodiment 4, sends an ACK / NACK for the downlink data to be transmitted in the PUCCH resource using the PUSCH resource.

[0191] This allows terminal 200 to temporarily stop transmitting P / SP-CSI, improving the resource utilization efficiency of the uplink. Furthermore, if the UCI includes both ACK / NACK and P / SP-CSI, terminal 200 dropping the P / SP-CSI transmission increases the resources allocated to ACK / NACK, thereby improving the reception quality of ACK / NACK.

[0192] (Embodiment 6) This embodiment describes the case where CA is applied to a terminal.

[0193] Since the base station and terminal according to this embodiment share the same basic configuration as the base station 100 and terminal 200 according to Embodiment 1, they will be explained with reference to Figures 5 and 6.

[0194] For example, if the UL-SCH indicator field and the CSI request field are set in each of multiple CCs, and there is no request for a CSI report from the base station 100 in any of the CCs, and the assigned PUSCH resource and the PUCCH resource assigned to transmit the UCI overlap in time (or partially overlap), then the terminal 200 transmits the UCI that is scheduled to be transmitted in PUCCH using the PUSCH resource. Here, the case where there is no request for a CSI report from the base station 100 is, for example, the case where CSI request=0 as described in Embodiments 1 to 3, or the case where CSI request=non-zero, CSI request=non-zero corresponds to reportQuantity, and reportQuantity=none is set in the upper layer signal, as described in Embodiments 4 or 5.

[0195] Here, the UCI to be transmitted in PUCCH includes, for example, at least an ACK / NACK for downlink data and either a P-CSI or an SP-CSI.

[0196] Furthermore, terminal 200 multiplexes the UCI to the PUSCH of the CC in which UL-SCH indicator=0 is set, among the multiple CCs set on terminal 200.

[0197] Thus, according to this embodiment, the terminal 200 can avoid multiplexing of UCI to the PUSCH that transmits UL-SCH, thereby preventing deterioration of UL-SCH reception quality. Furthermore, according to this embodiment, similar to Embodiment 1, the base station 100 can dynamically allocate PUSCH resources for transmitting UCI in response to changes in channel status, etc. Therefore, the reception quality of UCI at the base station 100 can be improved, and the utilization efficiency of uplink resources can be improved.

[0198] If there are multiple CCs with UL-SCH indicator=0 set, terminal 200 may, for example, multiplex the UCI on the PUSCH of the CC with the smallest CC index among the multiple CCs with UL-SCH indicator=0 set. Note that the CC to which the PUSCH resource used for sending the UCI is allocated is not limited to the CC with the smallest CC index, but may be any other CC. For example, if there are CCs with CSI request=0 and CSI request=non-zero set, terminal 200 may multiplex the UCI on the PUSCH of the CC with CSI request=0 set. Or, conversely, terminal 200 may multiplex the UCI on the PUSCH of the CC with CSI request=non-zero set.

[0199] Furthermore, if UL-SCH indicator=1 is set for all of the multiple CCs, terminal 200 may multiplex the UCI into the PUSCH transmitted in the CC with the smallest CC index, for example, similar to the method described in Non-Patent Document 3. Note that the CC to which the PUSCH resource used for transmitting the UCI is allocated is not limited to the CC with the smallest CC index, but may be any other CC.

[0200] Furthermore, if multiple PUSCHs are assigned within the same CC, and the PUSCH resource transmitting the UCI overlaps in time with those multiple PUSCHs, terminal 200 may multiplex the UCI on the PUSCH in the CC where UL-SCH indicator=0 is set that starts transmitting earliest (in other words, the PUSCH with the smaller symbol index that starts PUSCH transmission). Note that the PUSCH used to transmit the UCI is not limited to the PUSCH that starts transmitting earliest, but may be any other PUSCH.

[0201] The embodiments of this disclosure have been described above.

[0202] In the above embodiment, if UL-SCH indicator=0 and CSI request=0 are notified in the DCI, terminal 200 is enabled to transmit the UCI, which would normally be transmitted on PUCCH, on PUSCH. Also, if UL-SCH indicator=0, CSI request=non-zero, and reportQuantity=none are set in the DCI, terminal 200 is enabled to transmit the UCI, which would normally be transmitted on PUCCH, on PUSCH. However, the ambiguity in the relationship between the UL-SCH indicator field and the CSI request field can also be eliminated by not allowing base station 100 to set UL-SCH indicator=0 and CSI request=0 in the standard. In this case, terminal 200 does not expect that UL-SCH indicator=0 and CSI request=0 will be notified in the DCI for assigning PUSCH. Similarly, if reportQuantity=none is set in the standard, base station 100 may not be enabled to set UL-SCH indicator=0 and CSI request=non-zero in the DCI. In this case, the implementation of terminal 200 can be simplified.

[0203] Furthermore, the above embodiment described a case in which a UCI is transmitted using a PUSCH resource when the PUSCH resource for transmitting a UCI and the PUSCH resource assigned by a DCI with UL-SCH indicator=0 and CSI request=0 set overlap in time. However, in this disclosure, even when the PUSCH resource for transmitting a UCI and the PUSCH resource assigned by a DCI with UL-SCH indicator=0 and CSI request=0 set do not overlap in time, terminal 200 may transmit a UCI using a PUSCH resource.

[0204] Furthermore, this disclosure can be implemented as software, hardware, or software linked to hardware. Each functional block used in the description of the above embodiments may be implemented partially or entirely as an integrated circuit (LSI), and each process described in the above embodiments may be controlled partially or entirely by a single LSI or a combination of LSIs. An LSI may consist of individual chips, or it may consist of a single chip that includes some or all of the functional blocks. An LSI may have data inputs and outputs. Depending on the degree of integration, LSIs may be referred to as ICs, system LSIs, super LSIs, or ultra LSIs. The method of integrated circuit implementation is not limited to LSIs, and may also be implemented with dedicated circuits, general-purpose processors, or dedicated processors. In addition, a Field Programmable Gate Array (FPGA) that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells inside the LSI may be used. This disclosure may be implemented as digital processing or analog processing. Furthermore, if advancements in semiconductor technology or other derived technologies lead to the emergence of integrated circuit technologies that replace LSIs, then naturally, it would be possible to use those technologies to integrate functional blocks. The application of biotechnology, for example, is a possibility.

[0205] This disclosure is applicable to all types of devices, systems, and equipment with communication capabilities (collectively referred to as communication devices). Non-exclusive examples of communication devices include telephones (mobile phones, smartphones, etc.), tablets, personal computers (PCs) (laptops, desktops, notebooks, etc.), cameras (digital still / video cameras, etc.), digital players (digital audio / video players, etc.), wearable devices (wearable cameras, smartwatches, tracking devices, etc.), game consoles, digital book readers, telehealth and telemedicine devices, vehicles or mobile transport with communication capabilities (automobiles, airplanes, ships, etc.), and combinations of the above-mentioned devices.

[0206] Communication devices are not limited to portable or movable devices, but also include all kinds of non-portable or fixed devices, devices, and systems, such as smart home devices (appliances, lighting equipment, smart meters or measuring instruments, control panels, etc.), vending machines, and any other "things" that may exist on an IoT (Internet of Things) network.

[0207] Communication includes data communication via cellular systems, wireless LAN systems, and communication satellite systems, as well as data communication using combinations of these.

[0208] Furthermore, the communication device also includes devices such as controllers and sensors that are connected to or linked to a communication device that performs the communication functions described in this disclosure. For example, this includes controllers and sensors that generate control signals and data signals used by the communication device that performs the communication functions of the communication device.

[0209] Furthermore, communication equipment includes infrastructure facilities such as base stations, access points, and any other devices, devices, and systems that communicate with or control the aforementioned non-limited types of equipment.

[0210] A terminal in one embodiment of the present disclosure includes a receiver that receives first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information, wherein the first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted; and a transmitter that transmits the uplink control information using the resources of the uplink data channel when the first instruction information indicates that there is no transmission of the uplink data and the second instruction information indicates that there is no transmission of the channel status information.

[0211] In one embodiment of the present disclosure, the resources of the uplink data channel are resources that temporally overlap with the resources of the uplink control channel.

[0212] In a terminal according to one embodiment of the present disclosure, a plurality of component carriers are set for the terminal, and the transmitter transmits the uplink control information using the resources of the uplink data channel when the first instruction information and the second instruction information are set for each of the plurality of component carriers, and the second instruction information for all of the plurality of component carriers indicates that there is no transmission of the channel status information.

[0213] In one embodiment of the present disclosure, the resources of the uplink data channel are resources that temporally overlap with the resources of the uplink control channel.

[0214] In a terminal according to one embodiment of the present disclosure, the resource for the uplink data channel is a resource in a component carrier among the plurality of component carriers, where the first instruction information indicates that there is no transmission of uplink data.

[0215] In a terminal according to one embodiment of the present disclosure, the resource for the uplink data channel is the resource in the component carrier with the smallest component carrier number among the component carriers in which the first instruction information indicates that there is no transmission of uplink data.

[0216] In a terminal according to one embodiment of the present disclosure, the uplink data channel resource is the resource of the uplink data channel that starts transmitting earliest in time among a plurality of uplink data channels in the component carrier where the first instruction information indicates that there is no transmission of uplink data.

[0217] In a terminal according to one embodiment of the present disclosure, a plurality of component carriers are set for the terminal, and the transmitter has the first instruction information and the second instruction information set for each of the plurality of component carriers, and the second instruction information for at least one component carrier indicates that the channel status information is to be transmitted, then the transmitter multiplexes the uplink control information and the channel status information using the uplink data channel resources of the component carrier among the plurality of component carriers in which the first instruction information indicates that there is no uplink data transmission.

[0218] In a terminal according to one embodiment of the present disclosure, the resource for the uplink data channel is a resource in a component carrier among the plurality of component carriers, where the second instruction information indicates that there is no transmission of the channel state information.

[0219] In a terminal according to one embodiment of the present disclosure, the resource for the uplink data channel is the resource in the component carrier with the smallest component carrier number among the component carriers in which the first instruction information indicates that there is no transmission of uplink data.

[0220] In a terminal according to one embodiment of the present disclosure, the uplink data channel resource is the resource of the uplink data channel that starts transmitting earliest in time among a plurality of uplink data channels in the component carrier where the first instruction information indicates that there is no transmission of uplink data.

[0221] In a terminal according to one embodiment of the present disclosure, the uplink control information includes at least one of a response signal for downlink data and channel state information.

[0222] A base station in one embodiment of the present disclosure includes a transmitter that transmits first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information, wherein the first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted; and a receiver that receives the uplink control information transmitted using the resources of the uplink data channel when the first instruction information indicates that there is no transmission of uplink data and the second instruction information indicates that there is no transmission of channel status information.

[0223] A communication method in one embodiment of the present disclosure receives first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information. The first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted. If the first instruction information indicates that there is no transmission of uplink data and the second instruction information indicates that there is no transmission of channel status information, the communication method transmits the uplink control information using the resources of the uplink data channel.

[0224] A communication method in one embodiment of the present disclosure transmits first control information relating to an uplink data channel and second control information relating to an uplink control channel for transmitting uplink control information, wherein the first control information includes first instruction information indicating whether or not uplink data is transmitted and second instruction information indicating whether or not channel status information is transmitted, and if the first instruction information indicates that there is no transmission of uplink data and the second instruction information indicates that there is no transmission of channel status information, the communication method receives the uplink control information transmitted using the resources of the uplink data channel.

[0225] The disclosures in the specifications, drawings, and abstracts contained in Japanese applications 2018-139337, filed on 25 July 2018, and 2018-202046, filed on 26 October 2018, are incorporated herein by reference. [Industrial applicability]

[0226] One embodiment of this disclosure is useful for a mobile communication system. [Explanation of symbols]

[0227] 100 base stations 101,211 Control Unit 102 Data Generation Unit 103,107,110,212,214,216 Encoding section 104 Retransmission Control Unit 105, 108, 111, 213, 215, 217 Modulation section 106 Higher-level control signal generation unit 109 Downlink Control Signal Generation Unit 112,218 Signal assignment section 113,219 IFFT section 114,220 Transmitter 115,201 antennas 116,202 Receiving Unit 117,203 FFT section 118,204 Extraction part 119 ACK / NACK Demodulation Unit 120, 123, 126 Decoding section 121,124,127 Judgment section 122 CSI Demodulation Unit 125 UL-SCH demodulator 200 terminals 205 Downlink Control Signal Demodulation Unit 206,208,210 Decoding section 207 Higher-level control signal demodulation unit 209 Data Demodulation Unit

Claims

1. A receiver that receives downlink control information (DCI) including uplink shared channel (UL-SCH) instruction information and channel status information (CSI) request information, A transmitter that transmits acknowledgment (ACK) information, which is part of the Uplink Control Information (UCI), Includes, The UL-SCH instruction information indicates that the UL-SCH will not be transmitted in the physical uplink sharing channel (PUSCH), and when the CSI request information is set to 0, the semi-persistent CSI report will be transmitted in the PUSCH. If the resources of the physical uplink control channel (PUCCH) allocated for the transmission of the UCI overlap with the resources of the PUSCH, the transmitter shall use the resources of the PUSCH to transmit the ACK information. Communication device.

2. The communication device does not assume that a DCI will be notified that includes UL-SCH instruction information indicating that the UL-SCH will not be included in the PUSCH and CSI request information indicating that a CSI will not be requested. The communication device according to claim 1.

3. The CSI request information indicates whether or not aperiodic CSI reporting is requested on the PUSCH resource. The communication device according to claim 1.

4. Communication equipment, A process of receiving downlink control information (DCI) including uplink shared channel (UL-SCH) instruction information and channel status information (CSI) request information, The process involves transmitting acknowledgment (ACK) information, which is part of the Uplink Control Information (UCI). The UL-SCH instruction information indicates that the UL-SCH will not be included in the physical uplink sharing channel (PUSCH) and when the CSI request information is set to 0, a semi-persistent CSI report is included in the PUSCH and transmitted; The process includes: if the resources of the physical uplink control channel (PUCCH) allocated for transmitting the UCI overlap with the resources of the PUSCH, the PUSCH resources are used to transmit the ACK information. Communication method.

5. The communication device does not assume that a DCI will be notified that includes UL-SCH instruction information indicating that UL-SCH will not be included in the PUSCH transmission, and CSI request information indicating that CSI will not be requested. The communication method according to claim 4.

6. The CSI request information indicates whether or not aperiodic CSI reporting is requested on the PUSCH resource. The communication method according to claim 4.

7. The process involves receiving downlink control information (DCI) including uplink shared channel (UL-SCH) instruction information and channel status information (CSI) request information. The process involves sending acknowledgment (ACK) information, which is part of the Uplink Control Information (UCI). The UL-SCH instruction information indicates that the UL-SCH will not be transmitted in the physical uplink sharing channel (PUSCH), and when the CSI request information is set to 0, the process includes transmitting a semi-persistent CSI report in the PUSCH. If the resources of the physical uplink control channel (PUCCH) allocated for the transmission of the UCI overlap with the resources of the PUSCH, the system controls the process of transmitting the ACK information using the resources of the PUSCH. Integrated circuit.

8. A transmitter that transmits downlink control information (DCI) including uplink shared channel (UL-SCH) instruction information and channel status information (CSI) request information, A receiver that receives acknowledgment (ACK) information, which is part of the uplink control information (UCI), Includes, When the UL-SCH instruction information indicates that the UL-SCH is not transmitted in the physical uplink sharing channel (PUSCH) and the CSI request information is set to 0, the receiver receives the semi-persistent CSI report that is transmitted in the PUSCH, If the resources of the physical uplink control channel (PUCCH) allocated for the transmission of the UCI overlap with the resources of the PUSCH, the receiver receives the ACK information transmitted using the resources of the PUSCH. Base station.

9. The base station is, A process of transmitting downlink control information (DCI) including uplink shared channel (UL-SCH) instruction information and channel status information (CSI) request information, The process involves receiving acknowledgment (ACK) information, which is part of the Uplink Control Information (UCI), The UL-SCH instruction information indicates that the UL-SCH will not be transmitted in the physical uplink sharing channel (PUSCH), and when the CSI request information is set to 0, the process includes receiving a semi-persistent CSI report that is transmitted in the PUSCH. The process includes receiving the ACK information transmitted using the PUSCH resource when the resources of the physical uplink control channel (PUCCH) allocated for the transmission of the UCI overlap with the resources of the PUSCH, Communication method.

10. The process involves transmitting downlink control information (DCI), including uplink shared channel (UL-SCH) instruction information and channel status information (CSI) request information. The process involves receiving acknowledgment (ACK) information, which is part of the Uplink Control Information (UCI). The UL-SCH instruction information indicates that the UL-SCH will not be transmitted in the physical uplink sharing channel (PUSCH), and when the CSI request information is set to 0, the process receives a semi-persistent CSI report that is transmitted in the PUSCH. If the resources of the physical uplink control channel (PUCCH) allocated for the transmission of the UCI overlap with the resources of the PUSCH, the system controls the processing of receiving the ACK information transmitted using the PUSCH resources. Integrated circuit.

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