To provide a base station device, a mobile terminal device, and a communication control method, wherein it is possible to improve the accuracy of estimating the quality of a channel. A communication control method characterized by involving: a step for disposing a Channel State Information-Reference Signal (CSI-RS) which is a reference signal for estimating a downlink channel in a resource for the CSI-RS transmission sub-frame; a step for setting the resource disposed in an area adjacent to the CSI-RS transmission sub-frame as a muting resource; and a step for transmitting, to a mobile terminal device, transmission interval information pertaining to the transmission interval of sub-frames having the same timing within the transmission cycle of CSI-RS transmission sub-frames in the area in which the mobile terminal device is located and the transmission cycle of CSI-RS transmission sub-frames in an adjacent area.