The table as shown in FIG. 6 associates the bitmap information included in the DCI with the CRS multiplexing pattern, bitmap “00000” represents “the same as the serving cell”, bitmap “00001” represents “only shift of the serving cell+1”, bitmap “00010” represents “only shift of the serving cell+2”, bitmap “00100” represents “only shift of the serving cell+3”, and bitmap “11111” represents “shift of the serving cell+1/+2/+3/+4/+5”. The bitmap indicates subcarrier positions as shown in FIG. 7. In FIG. 7, the serving cell represents a CRS multiplexing pattern of cell ID #0, “shift of the serving cell+1” represents a CRS multiplexing pattern of cell ID#1, “shift of the serving cell+2” represents a CRS multiplexing pattern of cell ID #2, and “shift of the serving cell+3” represents a CRS multiplexing pattern of cell ID#3.
In addition, the table as shown in FIG. 6 is one example, and the invention is not limited thereto. Further, although FIGS. 6 and 7 show the case of one antenna, this method is applicable to the case of two or more antennas.
(Second Method-1)
This method is a method for notifying of downlink control information indicative of a muting pattern as a muting pattern. In this method, bits representing a muting pattern are included in the DCI and are dynamically notified. In this case, the downlink control information is associated with the muting pattern. The mobile terminal apparatus has a table (table that associates the bits included in the DCI with the muting pattern) as shown in FIG. 8, recognizes the muting pattern from the bits notified by the DCI, and demodulates data signals using resources except the muting pattern.