A base station apparatus (100, 400, 800) comprising: a scheduler (102, 804) configured to determine to which user data should be transmitted based on a channel quality indicator CQI from each terminal apparatus and to select for the user data for a predetermined time unit, at least one of a plurality of subcarrier blocks, into which a frequency band is divided; a subcarrier block selection section (110, 402, 805) configured to assign the selected at least one subcarrier block to transmission data for a terminal apparatus; a mapping section configured to map the transmission data to first subcarriers within the selected at least one subcarrier block, the transmission data being subjected to a frequency hopping wherein the mapping is performed according to a selected hopping pattern for the respective subcarrier block; and a transmission section configured to transmit the mapped transmission data and control information that is mapped to a subcarrier block, characterized in that: the subcarrier block selection section (110, 402, 805) is configured to assign a predetermined subcarrier block among the plurality of subcarrier blocks to the control information; and the mapping section is configured to map the control information to second subcarriers within the predetermined subcarrier block, the control information being subjected to frequency hopping wherein the mapping is performed according to a predetermined hopping pattern that is different from the selected hopping pattern. a scheduler (102, 804) configured to determine to which user data should be transmitted based on a channel quality indicator CQI from each terminal apparatus and to select for the user data for a predetermined time unit, at least one of a plurality of subcarrier blocks, into which a frequency band is divided; a subcarrier block selection section (110, 402, 805) configured to assign the selected at least one subcarrier block to transmission data for a terminal apparatus; a mapping section configured to map the transmission data to first subcarriers within the selected at least one subcarrier block, the transmission data being subjected to a frequency hopping wherein the mapping is performed according to a selected hopping pattern for the respective subcarrier block; and a transmission section configured to transmit the mapped transmission data and control information that is mapped to a subcarrier block, characterized in that: the subcarrier block selection section (110, 402, 805) is configured to assign a predetermined subcarrier block among the plurality of subcarrier blocks to the control information; and the mapping section is configured to map the control information to second subcarriers within the predetermined subcarrier block, the control information being subjected to frequency hopping wherein the mapping is performed according to a predetermined hopping pattern that is different from the selected hopping pattern. the subcarrier block selection section (110, 402, 805) is configured to assign a predetermined subcarrier block among the plurality of subcarrier blocks to the control information; and the mapping section is configured to map the control information to second subcarriers within the predetermined subcarrier block, the control information being subjected to frequency hopping wherein the mapping is performed according to a predetermined hopping pattern that is different from the selected hopping pattern.