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US 11,445,513 B2Granted
User terminal and radio communication method
AssigneeNtt Docomo, Inc.
InventorsYuki Matsumura, Kazuki Takeda, Satoshi Nagata
Life of this patent
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Abstract
A user terminal according to the present invention includes: a transmitting section that transmits uplink control information (UCI) using an uplink control channel of a first duration and/or an uplink control channel of a second duration longer than the first duration; a receiving section that receives information related to fallback of the uplink control channel; and a control section that controls a format of the uplink control channel to be used to transmit the UCI, based on information related to the fallback.
Claims4
A terminal comprising:
- a receiver that receives information related to fallback of an uplink control channel;
- a processor that controls a format of the uplink control channel used for transmission of uplink control information (UCI) based on the information related to the fallback;
- and
- a transmitter that transmits the UCI based on the format of the uplink control channel by using at least one of an uplink control channel of a first duration over a first number of symbols and an uplink control channel of a second duration over a second number of symbols, wherein the second duration is longer than the first duration,
- wherein, when the processor performs fallback to the format of the uplink control channel of the first duration and when the UCI to be transmitted includes HARQ-ACK of up to 2 bits, the transmitter transmits the HARQ-ACK by the format of the uplink control channel of the first duration, and the transmitter does not transmit channel state information (CSI).
2 more elements
A radio communication method for a terminal, comprising:
- receiving information related to fallback of an uplink control channel;
- controlling a format of the uplink control channel used for transmission of uplink control information (UCI) based on the information related to the fallback;
- and
- transmitting the UCI based on the format of the uplink control channel by using at least one of an uplink control channel of a first duration over a first number of symbols and an uplink control channel of a second duration over a second number of symbols, wherein the second duration is longer than the first duration,
- wherein, when the terminal performs fallback to the format of the uplink control channel of the first duration and when the UCI to be transmitted includes HARQ-ACK of up to 2 bits, the terminal transmits the HARQ-ACK by the format of the uplink control channel of the first duration, and the terminal does not transmit channel state information (CSI).
2 more elements
A base station comprising:
- a transmitter that transmits information related to fallback of an uplink control channel;
- and
- a receiver that receives uplink control information (UCI) based on a format of the uplink control channel by using at least one of an uplink control channel of a first duration over a first number of symbols and an uplink control channel of a second duration over a second number of symbols, wherein the second duration is longer than the first duration,
- wherein the format of the uplink control channel used for transmission of the UCI is controlled based on the information related to the fallback, and
- wherein, when a terminal performs fallback to the format of the uplink control channel of the first duration and when the UCI to be transmitted includes HARQ-ACK of up to 2 bits, the receiver receives the HARQ-ACK by the format of the uplink control channel of the first duration, and the receiver does not receive channel state information (CSI).
2 more elements
A system comprising a terminal and a base station, wherein
- the base station comprises:
- a first transmitter that transmits information related to fallback of an uplink control channel, and
- the terminal comprises:
- a receiver that receives the information related to fallback of the uplink control channel;
- a processor that controls a format of the uplink control channel used for transmission of uplink control information (UCI) based on the information related to the fallback;
- and
- a second transmitter that transmits the UCI based on the format of the uplink control channel by using at least one of an uplink control channel of a first duration over a first number of symbols and an uplink control channel of a second duration over a second number of symbols, wherein the second duration is longer than the first duration,
- wherein, when the processor performs fallback to the format of the uplink control channel of the first duration and when the UCI to be transmitted includes HARQ-ACK of up to 2 bits, the second transmitter transmits the HARQ-ACK by the format of the uplink control channel of the first duration, and the second transmitter does not transmit channel state information (CSI).
5 more elements
Dependencies are inferred from the claim text.