In the case as shown in FIG. 2, the radio base station apparatus of the cell #A notifies the mobile terminal apparatus of the CRS multiplexing position information of the cell #B that is an adjacent cell. In the mobile terminal apparatus, the data signal is not multiplexed into the CRS multiplexing position of the cell #B so that the data signal of the cell #A does not collide. Therefore, the CRS multiplexing positions of the cell #B mean a muting pattern of the PDSCH of the cell #A. In addition, a shift amount is calculated from the cell ID, and it is possible to obtain the CRS multiplexing positions of the adjacent cell from the shift amount. In Aspect 1 in the invention, in order for the CRS not to collide with a data signal in the mobile terminal apparatus, the mobile terminal apparatus is notified of a muting pattern of the PDSCH of the serving cell. When the serving cell is the cell #A, the mobile terminal apparatus is notified of a pattern (CRS multiplexing positions of the cell #B) of PDSCH muting as shown in FIG. 2A, while when the serving cell is the cell #B, being notified of a pattern (CRS multiplexing positions of the cell #A) of PDSCH muting as shown in FIG. 2B.