BASE STATION DEVICE, TERMINAL DEVICE, COMMUNICATION SYSTEM, TRANSMISSION METHOD, RECEPTION METHOD, COMMUNICATION METHOD AND INTEGRATED CIRCUIT

摘要

A communication system equipped with a first base station device, at least one second base station device which has transmission power lower than that of the first base station device, and terminal devices each of which connects to the first base station device or the second base station device, wherein a transmission unit of the second base station device maps a smaller number of reference signals per one resource block than the number of reference signals mapped per one resource block by the first base station device and transmits the resulting resource block.