Base station apparatus, mobile station apparatus, communication system, transmission method, reception method and communication method

摘要

In a wireless communication system constituting a heterogeneous network, the interference between cells is efficiently reduced or suppressed. In a wireless communication system in which a base station apparatus communicates with a mobile station apparatus, the base station apparatus notifies the mobile station apparatus of control information that is related to a cell-specific reference signal specific to the cell ID of another base station apparatus and that includes information of the number of ports of the cell-specific reference signal.