Mobile station apparatus, processing method, and integrated circuit

A mobile station apparatus that communicates with a base station apparatus on a plurality of serving cells, comprising:

• a determining unit configured to determine a number of bits of HARQ information based on a number of downlink subframes corresponding to an uplink subframe in which the HARQ information is transmitted, a number of serving cells configured, and a transmission mode configured in each serving cell;
• an applying unit configured to apply spatial bundling to the HARQ information in a case where the determined number of bits of the HARQ information exceeds a predetermined value;
• and
• a coding unit configured to select one of a first coding scheme and a second coding scheme based on the number of bits of the HARQ information to which the spatial bundling has been applied and a number of bits of a scheduling request, and to encode both the HARQ information and the scheduling request using the selected coding scheme.

A processing method of a mobile station apparatus that communicates with a base station apparatus on a plurality of serving cells, comprising:

• determining a number of bits of HARQ information based on a number of downlink subframes corresponding an uplink subframe in which the HARQ information is transmitted, a number of serving cells configured, and a transmission mode configured in each serving cell;
• applying spatial bundling to the HARQ information in a case where the determined number of bits of the HARQ information exceeds a predetermined value;
• and
• selecting one of a first coding scheme and a second coding scheme based on the number of bits of the HARQ information to which the spatial bundling has been applied and a number of bits of a scheduling request, and encoding both the HARQ information and the scheduling request using the selected coding scheme.

An integrated circuit mounted on a mobile station apparatus that communicates with a base station apparatus in on plurality of serving cells, comprising functions of:

• determining a number of bits of HARQ information based on a number of downlink subframes corresponding to an uplink subframe in which the HARQ information is transmitted, a number of serving cells configured, and a transmission mode configured in each serving cell;
• applying spatial bundling to the HARQ information in a case where the determined number of bits of the HARQ information exceeds a predetermined value;
• and
• selecting one of a first coding scheme and a second coding scheme based on the number of bits of the HARQ information to which the spatial bundling has been applied and a number of bits of a scheduling request, and coding both the HARQ information and the scheduling request using the selected coding scheme.