Terminal apparatus, base station apparatus, and wireless communication method

1. A terminal apparatus comprising:

a receiver configured to receive a radio signal;

processor circuitry configured to generate a response signal to respond to the received radio signal; and

a transmitter configured to transmit a plurality of types of signals including the generated response signal,

wherein the transmitter is configured to change a size of a radio resource to be used for transmitting the generated response signal while maintaining a format for transmitting the generated response signal between when the generated response signal is transmitted on one physical uplink control channel resource (PUCCH) and when the plurality of types of signals including the generated response signal are transmitted on the one PUCCH resource.

2. The terminal apparatus of claim 1 , wherein the processor circuitry is further configured to generate a radio resource allocation request for transmitting specific signals,

wherein the transmitter changes the size of the radio resource to be used for transmitting the response signal between a case where the response signal and the radio resource allocation request are transmitted on the PUCCH resource and a case where the radio resource allocation request is not transmitted and the response signal is transmitted.

3. The terminal apparatus of claim 2 , wherein when the response signal and the radio resource allocation request are transmitted at the same timing, the transmitter transmits the response signal and the radio resource allocation request by using some radio resources allocated to the transmission of the response signal and the radio resource allocation request.

4. The terminal apparatus of claim 3 , wherein the transmitter transmits some response signals by using the radio resources allocated to the radio resource allocation request.

5. The terminal apparatus of claim 2 , wherein the transmitter notifies of the generation of the radio resource allocation request by recognizing that some radio resources allocated to the response signals are not transmitted.

6. The terminal apparatus of claim 2 , wherein the transmitter is configured to:

transmit the radio resource allocation request by using radio resources allocated to the radio resource allocation request, and

transmit response signals by using some radio resources allocated to the response signal.

7. The terminal apparatus of claim 2 , wherein the receiver receives the radio signal and a plurality of first groups including data items each having a predetermined size, and

the processor circuitry generates response signals for each of second groups obtained by combining the first groups.

8. The terminal apparatus of claim 2 , wherein the transmitter has a parameter for adjusting transmission power density for each kind of radio resource allocation request, and changes the parameter at the time of transmitting the radio resource allocation request and the response signal depending on the kind of the radio resource allocation request.

9. The terminal apparatus of claim 1 , wherein the transmitter is configured to transmit the generated response signal by using resource blocks comprised of a plurality of subcarriers, and

wherein one or more reference signals are mapped in one or more subcarriers of the plurality of subcarriers.

10. The terminal apparatus of claim 9 , wherein four reference signals are mapped in each resource block.

11. A wireless communication method, comprising:

receiving a radio signal;

generating a response signal to respond to the received radio signal; and

transmitting a plurality of types of signals including the generated response signal,

wherein the transmitter is configured to change a size of a radio resource to be used for transmitting the generated response signal while maintaining a format for transmitting the generated response signal between when the generated response signal is transmitted on one physical uplink control channel resource (PUCCH) and when the plurality of types of signals including the generated response signal are transmitted on the PUCCH resource.

12. The wireless communication method of claim 11 , wherein the method is implemented in a terminal apparatus.

13. The wireless communication method of claim 11 , further comprising:

generating a radio resource allocation request for transmitting specific signals, and

changing the size of the radio resource to be used for transmitting the response signal between a case where the response signal and the radio resource allocation request are transmitted on the PUCCH resource and a case where the radio resource allocation request is not transmitted and the response signal is transmitted.

14. The wireless communication method of claim 11 , further comprising transmitting the generated response signal by using resource blocks comprised of a plurality of subcarriers,

wherein one or more reference signals are mapped in one or more subcarriers of the plurality of subcarriers.

15. A base station apparatus, comprising:

a receiver configured to receive a radio signal;

processor circuitry configured to generate a response signal to respond to the received radio signal; and

a transmitter configured to transmit a plurality of types of signals including the generated response signal,

wherein the transmitting is configured to change a size of a radio resource to be used for transmitting the generated response signal while maintaining a format for transmitting the generated response signal between when the generated response signal is transmitted on one physical uplink control channel resource (PUCCH) and when the plurality of types of signals including the generated response signal are transmitted on the one physical PUCCH resource.

16. The base station apparatus of claim 15 , wherein the receiver is further configured to receive a radio resource allocation request for specific signals, and

wherein the transmitter changes the size of the radio resource to be used for transmitting the response signal between a case where the response signal and the radio resource allocation request are transmitted on the PDCCH resource and a case where the radio resource allocation request is not transmitted and the response signal is transmitted.

17. The base station apparatus of claim 15 , wherein the transmitter is configured to transmit the generated response signal by using resource blocks comprised of a plurality of subcarriers, and

wherein one or more reference signals are mapped in one or more subcarriers of the plurality of subcarriers.

18. A wireless communication method, comprising:

receiving a radio signal;

generating a response signal to respond to the received radio signal; and

transmitting a plurality of types of signals including the generated response signal,

wherein the transmitting is configured to change a size of a radio resource to be used for transmitting the generated response signal while maintaining a format for transmitting the generated response signal between when the generated response signal is transmitted on one physical uplink control channel resource (PUCCH) and when the plurality of types of signals including the generated response signal are transmitted on the one PDCCH resource.

19. The wireless communication method of claim 18 , wherein the method is implemented in a base station apparatus.

20. The wireless communication method of claim 18 , further comprising:

receiving a radio resource allocation request for specific signals, and

changing the size of the radio resource to be used for transmitting the response signal between a case where the response signal and the radio resource allocation request are transmitted on the PDCCH resource and a case where the radio resource allocation request is not transmitted and the response signal is transmitted.

21. The wireless communication method of claim 18 , further comprising

transmitting the generated response signal by using resource blocks comprised of a plurality of subcarriers,

wherein one or more reference signals are mapped in one or more subcarriers of the plurality of subcarriers.