Base station apparatus and response signal receiving method

A base station apparatus comprising:

• a transmitting unit configured to transmit data to a radio communication apparatus, and transmit, to the radio communication apparatus, control information on one or a plurality of control channel elements (CCEs) with consecutive CCE number(s);
• and
• a receiving unit configured to receive a response signal corresponding to the data, the response signal being transmitted from the radio communication apparatus, wherein:
• the response signal is spread with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of said one or a plurality of CCEs, and with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index;
• the PUCCH is used for transmission of the response signal;
• and
• one of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is used when the control information is transmitted on the plurality of CCEs, and another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is used when the control information is transmitted on one CCE.

A response signal receiving method comprising:

• transmitting data to a radio communication apparatus;
• transmitting, to the radio communication apparatus, control information on one or a plurality of control channel elements (CCEs) with consecutive CCE number(s), CCEs being numbered sequentially from one;
• and
• receiving a response signal corresponding to the data, the response signal being transmitted from the radio communication apparatus, wherein:
• the response signal is spread with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of said one or a plurality of CCEs, and with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index;
• and
• one of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is associated with an odd CCE number and a resource another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is associated with an even CCE number, and the first CCE number is restricted to be an odd number when the control information is transmitted on the plurality of CCEs.

A base station apparatus comprising:

• a transmitting unit configured to transmit data to a radio communication apparatus, and transmit, to the radio communication apparatus, control information on one or a plurality of control channel elements (CCEs) with consecutive CCE number(s);
• and
• a receiving unit configured to receive a response signal corresponding to the data, the response signal being transmitted from the radio communication apparatus, wherein:
• the response signal is spread with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of said one or a plurality of CCEs, and with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index;
• one of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is associated with an odd CCE number and another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is associated with an even CCE number;
• and
• one of orthogonal sequences used for a cyclic shift value is determined from an index of the PUCCH, which is associated with an odd CCE number, and another one of the orthogonal sequences used for the same cyclic shift value is determined from an index of the PUCCH, which is associated with an even CCE number.

A response signal receiving method comprising:

• transmitting data to a radio communication apparatus, and transmitting, to the radio communication apparatus, control information on one or a plurality of control channel elements (CCEs) with consecutive CCE number(s);
• and
• receiving a response signal corresponding to the data, the response signal being transmitted from the radio communication apparatus, wherein:
• the response signal is spread with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of said one or a plurality of CCEs, and with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index;
• the PUCCH is used for transmission of the response signal;
• and
• one of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is used when the control information is transmitted on the plurality of CCEs, and another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is used when the control information is transmitted on one CCE.

A response signal receiving method comprising:

• transmitting data to a radio communication apparatus, and transmitting, to the radio communication apparatus, control information on one or a plurality of control channel elements (CCEs) with consecutive CCE number(s);
• and
• receiving a response signal corresponding to the data, the response signal being transmitted from the radio communication apparatus, wherein:
• the response signal is spread with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of said one or a plurality of CCEs, and with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index;
• one of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is associated with an odd CCE number and another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is associated with an even CCE number;
• and
• one of orthogonal sequences used for a cyclic shift value is determined from an index of the PUCCH, which is associated with an odd CCE number, and another one of the orthogonal sequences used for the same cyclic shift value is determined from an index of the PUCCH, which is associated with an even CCE number.