Communication device, transmitting method, and receiving method

A communication device, comprising:

• a transmitter that transmits a data signal;
• and
• a receiver that receives a response signal which is repeated over multiple subframes in response to the data signal, the response signal in each of the multiple subframes being multiplied by a corresponding one of components forming one of a plurality of first sequences orthogonal to each other, the response signal being multiplied by a second sequence defined by one of a plurality of cyclic shift indexes and one of a plurality of third sequences orthogonal to each other,
• wherein, among a plurality of resources, a resource associated with one of at least two first sequences of the plurality of first sequences is different from a resource associated with another one of the at least two first sequences, each of the plurality of resources being constituted by one of the plurality of cyclic shift indexes and one of the plurality of third sequences, and
• wherein the communication device secures physical uplink control channel (PUCCH) resources and suppresses transmission performance degradation.

A transmitting method, comprising:

• repeating a response signal over multiple subframes in response to a data signal and multiplying the response signal in each of the multiple subframes by a corresponding one of components forming one of a plurality of first sequences orthogonal to each other;
• and
• multiplying the response signal by a second sequence defined by one of a plurality of cyclic shift indexes and one of a plurality of third sequences orthogonal to each other,
• wherein, among a plurality of resources, a resource associated with one of at least two first sequences of the plurality of first sequences is different from a resource associated with another one of the at least two first sequences, each of the plurality of resources being constituted by one of the plurality of cyclic shift indexes and one of the plurality of third sequences, and
• wherein physical uplink control channel (PUCCH) resources are secured and transmission performance degradation is suppressed.

A receiving method, comprising:

• transmitting a data signal;
• and
• receiving a response signal which is repeated over multiple subframes in response to the data signal, the response signal in each of the multiple subframes being multiplied by a corresponding one of components forming one of a plurality of first sequences orthogonal to each other, the response signal being multiplied by a second sequence defined by one of a plurality of cyclic shift indexes and one of a plurality of third sequences orthogonal to each other,
• wherein, among a plurality of resources, a resource associated with one of at least two first sequences of the plurality of first sequences is different from a resource associated with another one of the at least two first sequences, each of the plurality of resources being constituted by one of the plurality of cyclic shift indexes and one of the plurality of third sequences, and
• wherein physical uplink control channel (PUCCH) resources are secured and transmission performance degradation is suppressed.