User terminal and radio communication method
The present invention is designed so that, when a CP-OFDM waveform is supported in the UL in addition to DFT-spreading OFDM waveform, transmission of UCI can still be controlled adequately. According to the present invention, a user terminal has a transmission section that transmits uplink control information (UCI), and a control section that controls transmission of the UCI based on a waveform of an uplink (UL) data channel or based on indication information provided via higher layer signaling and/or downlink control information (DCI).
1. A terminal comprising:
a receiver that receives a downlink control information (DCI) and higher layer signaling; and
a processor that determines, based on an indication information included in the DCI and a configuration information included in the higher layer signaling, a waveform, among waveforms including a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform and a Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform, of an uplink (UL) control channel (PUCCH) used in a transmission of an UL control information (UCI),
wherein the processor determines, based on the indication information included in the DCI and the configuration information included in the higher layer signaling, whether a number of symbols of the PUCCH is 1 or 2, or greater than 2, and
wherein, when there is no transmission of an UL shared channel (PUSCH) in a slot where the UCI is transmitted, the processor controls to transmit the UCI by using the PUCCH with the determined number of symbols and the determined waveform, based on the indication information included in the DCI.
2. A radio communication method for a terminal, comprising:
receiving a downlink control information (DCI) and higher layer signaling;
determining, based on an indication information included in the DCI and a configuration information included in the higher layer signaling, a waveform, among waveforms including a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform and a Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform, of an uplink (UL) control channel (PUCCH) used in a transmission of an UL control information (UCI);
determining, based on the indication information included in the DCI and the configuration information included in the higher layer signaling, whether a number of symbols of the PUCCH is 1 or 2, or greater than 2; and
when there is no transmission of an UL shared channel (PUSCH) in a slot where the UCI is transmitted, controlling to transmit the UCI by using the PUCCH with the determined number of symbols and the determined waveform, based on the indication information included in the DCI.
3. A base station comprising:
a transmitter that transmits a downlink control information (DCI), including an indication information, and higher layer signaling, including a configuration information, for a terminal to determine a waveform, among waveforms including a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform and a Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform, of an uplink (UL) control channel (PUCCH) and to determine whether a number of symbols of the PUCCH is 1 or 2, or greater than 2; and
a processor that indicates to transmit a UL control information (UCI) by using the PUCCH based on the indication information and the configuration information,
wherein, when there is no transmission of an UL shared channel (PUSCH) in a slot where the UCI is transmitted, the processor indicates to transmit the UCI by using the PUCCH with the determined number of symbols and the determined waveform, based on the indication information included in the DCI.
4. A system comprises a terminal and a base station, wherein:
the terminal comprising:
a receiver of the terminal that receives a downlink control information (DCI) and higher layer signaling; and
a processor of the terminal that determines, based on an indication information included in the DCI and a configuration information included in the higher layer signaling, a waveform, among waveforms including a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform and a Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform, of an uplink (UL) control channel (PUCCH) used in a transmission of an UL control information (UCI),
wherein the processor of the terminal determines, based on the indication information included in the DCI and the configuration information included in the higher layer signaling, whether a number of symbols of the PUCCH is 1 or 2, or greater than 2, and
wherein, when there is no transmission of an UL shared channel (PUSCH) in a slot where the UCI is transmitted, the processor of the terminal controls to transmit the UCI by using the PUCCH with the determined number of symbols and the determined waveform, based on the indication information included in the DCI; and
the base station comprising:
a transmitter of the base station that transmits the DCI and the higher layer signaling; and
a processor of the base station that indicates to transmit the UCI by using the PUCCH based on the indication information and the configuration information,
wherein, when there is no transmission of the PUSCH in the slot, the processor of the base station indicates to transmit the UCI by using the PUCCH with the determined number of symbols and the determined waveform, based on the indication information included in the DCI.
5. The terminal according to claim 1 , wherein, when there is no transmission of the PUSCH in the slot, the processor controls to transmit the UCI by using a PUCCH of 1 or 2 symbols to which the CP-OFDM waveform is applied based on the indication information included in the DCI.