Terminal apparatus, base station apparatus, integrated circuit, and communication method

A communication method used in a terminal apparatus that is configured to communicate with a base station apparatus, the communication method comprising:

• receiving first information indicating a first subframe in which a cell-specific reference signal (CRS) is present, and second information which indicates the number of CRS antenna ports and is used to determine a resource element to which a physical downlink control channel (PDSCH) is mapped,
• wherein, in a second subframe other than the first subframe, a PDSCH transmitted through an antenna port different from a CRS antenna port for a serving cell is mapped to a resource element, the resource element being determined based on the number of CRS antenna ports indicated by the second information corresponding to the PDSCH.

A base station apparatus that is configured to communicate with a terminal apparatus, the base station apparatus comprising:

• a transmission circuit configured to and/or programmed to transmit first information indicating a first subframe in which a cell-specific reference signal (CRS) is present, and second information which indicates the number of CRS antenna ports and is used to determine a resource element to which a physical downlink control channel (PDSCH) is mapped,
• wherein, in a second subframe other than the first subframe, a PDSCH transmitted through an antenna port different from a CRS antenna port for a serving cell is mapped to a resource element, the resource element being determined based on the number of CRS antenna ports indicated by the second information corresponding to the PDSCH.

A communication method used in a base station apparatus that is configured to communicate with a terminal apparatus, the communication method comprising:

• transmitting first information indicating a first subframe in which a cell-specific reference signal (CRS) is present, and second information which indicates the number of CRS antenna ports and is used to determine a resource element to which a physical downlink control channel (PDSCH) is mapped,
• wherein, in a second subframe other than the first subframe, a PDSCH transmitted through an antenna port different from a CRS antenna port for a serving cell is mapped to a resource element, the resource element being determined based on the number of CRS antenna ports indicated by the second information corresponding to the PDSCH.