Patent ID: 8873437

Claim:
A base station apparatus to be used in a mobile communication system allowing for user equipment terminals having different numbers of receiving antennas, the base station apparatus comprising: a mapping unit configured to map reference signals, primary broadcasting signals, synchronization signals, and L1/L2 control signals onto a predetermined signal format; and a transmission unit configured to transmit the mapped signals, wherein within a sub-frame, the mapping unit is configured to map the L1/L2 control signals and the primary broadcasting signals so that the L1/L2 control signals and the primary broadcasting signals are time-domain multiplexed, the mapping unit is configured to map all the primary broadcasting signals and the synchronization signals within a predetermined bandwidth in a middle of a system bandwidth, and the mapping unit is configured to, in one or more OFDM symbols other than one or more OFDM modules where the L1/L2 control signals are mapped, prevent reference signals, which are included in a transmission stream other than a predetermined transmission stream from being allocated within the predetermined bandwidth where the primary broadcasting signals and the synchronization signals are mapped in the middle of the system bandwidth; wherein a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols to which the L1/L2 control signal is mapped within the predetermined bandwidth in the sub-frame is different from a number of OFDM symbols onto which the L1/L2 control signal is mapped in a bandwidth other than the predetermined bandwidth in the sub-frame.