Base Station Apparatus, Mobile Station Apparatus, Method for Mapping a Response Signal, and Method for Determining a Response Signal Resource

A mobile station apparatus comprising:

• a receiver configured to receive, from a base station, allocation information indicating a plurality of uplink resource block(s);
• and
• a processor configured to obtain from the base station a response signal for data mapped on the uplink resource block(s), the response signal being obtained using a first coding for the mobile station in a first cell or first cell sector, the first coding being different from a second coding used by the base station for a response signal in a neighboring cell or neighboring cell sector, the response signal being mapped to a resource of downlink based on an index of allocated plurality of uplink resource blocks.

A method in a mobile station apparatus comprising:

• receiving, from a base station, allocation information indicating one or a plurality of uplink resource block(s), the plurality of uplink resource blocks being consecutive in a frequency domain;
• obtaining from the base station a response signal for data mapped on the uplink resource block(s), the response signal being obtained using a first coding for the mobile station in a first cell or first cell sector, the first coding being different from a second coding used by the base station for a response signal in a neighboring cell or neighboring cell sector, the response signal being mapped to a resource of downlink based on an index of allocated one or a plurality of uplink resource block.

A method in a base station apparatus comprising:

• allocating, to a mobile station, one or a plurality of uplink resource block(s), the plurality of uplink resource blocks being consecutive in a frequency domain;
• providing a response signal for uplink data for a mobile station in a first cell or first cell sector using a first coding, the first coding being different from a second coding with which the base station apparatus is configured provide a response signal in a neighboring cell or neighboring cell sector, the response signal being mapped to a resource of downlink based on an index of the allocated one or a plurality of uplink resource block;
• transmitting the response signal to the mobile station.