Abase station apparatus configured to communicate with a terminal apparatus, wherein the base station apparatus configures an enhanced physical control channel area for the terminal apparatus to monitor an enhanced physical downlink control channel (601-606; 801-806; 1301; 1401), the base station apparatus comprising: a transmission unit configured to transmit the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) using one or more resources; wherein the enhanced physical control channel area corresponds to a plurality of resource block pairs; each of the plurality of resource block pairs includes a plurality of numbered resource element groups; the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) is transmitted using either a first mapping or a second mapping on a basis of information configured by a higher layer; each of the one or more resources used for the first mapping consists of a plurality of resource element groups in a single resource block pair within the plurality of resource block pairs; each of the one or more resources used for the second mapping consists of a plurality of resource element groups in more than one resource block pair within the plurality of resource block pairs; a start position for the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) is determined from a first higher layer parameter; the transmission unit is configured to transmit the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) on a sub frame configured by a second higher layer parameter; the second higher layer parameter is a 40-bit bitmap, and each bit being set to 1 among the 40-bit bitmap corresponds to a subframe configurable for an enhanced physical downlink control channel. a transmission unit configured to transmit the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) using one or more resources; wherein the enhanced physical control channel area corresponds to a plurality of resource block pairs; each of the plurality of resource block pairs includes a plurality of numbered resource element groups; the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) is transmitted using either a first mapping or a second mapping on a basis of information configured by a higher layer; each of the one or more resources used for the first mapping consists of a plurality of resource element groups in a single resource block pair within the plurality of resource block pairs; each of the one or more resources used for the second mapping consists of a plurality of resource element groups in more than one resource block pair within the plurality of resource block pairs; a start position for the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) is determined from a first higher layer parameter; the transmission unit is configured to transmit the enhanced physical downlink control channel (601-606; 801-806; 1301; 1401) on a sub frame configured by a second higher layer parameter; the second higher layer parameter is a 40-bit bitmap, and each bit being set to 1 among the 40-bit bitmap corresponds to a subframe configurable for an enhanced physical downlink control channel.