Base station apparatus and communication control method

A communication control method in a base station apparatus used in a mobile communication system to which an OFDM scheme is applied in downlink, comprising:

• a scheduling step of performing assignment of radio resources to a user apparatus for each subframe;
• a control channel generation step of generating a control channel for reporting a result of scheduling of the scheduling step to the user apparatus;
• and
• a mapping step of mapping the control channel and a data channel,
• wherein, in the mapping step, the base station apparatus maps the control channel to a predetermined number of OFDM symbols from the start of a subframe formed by plural OFDM symbols, and maps control information to subcarriers in a first OFDM symbol of the subframe such that the subcarriers do not overlap between cells in a frequency domain, the control information including information indicating a radio resource amount used for the control channel,
• two antenna transmission is performed by space frequency block coding,
• the control information is mapped to consecutive two subcarriers, and
• a control block of each user is mapped to an OFDM symbol within three OFDM symbols in which the control channel is mapped.

A base station apparatus used in a mobile communication system to which an OFDM scheme is applied in downlink, comprising:

• a data channel generation unit configure to generate a data channel;
• a control channel generation unit configured to generate a control channel that includes at least assignment information of the data channel generated in the data channel generation unit;
• a part 0 information generation unit configured to generate part 0 information that includes information indicating the number of OFDM symbols used for the control channel generated in the control channel generation unit;
• a mapping unit configured to map the part 0 information generated in the part 0 information generation unit, the control channel generated in the control channel generation unit, and the data channel generated in the data channel generation unit,
• wherein the mapping unit maps the control channel to a predetermined number of OFDM symbols from the start of a subframe formed by plural OFDM symbols, and maps the part 0 information to subcarriers in a first OFDM symbol of the subframe such that the subcarriers do not overlap between cells in a frequency domain,
• two antenna transmission is performed by space frequency block coding, and
• the part 0 information generated in the part 0 information generation unit is mapped to consecutive two subcarriers.

A transmission method in a base station apparatus used in a mobile communication system to which an OFDM scheme is applied in downlink, comprising:

• a step of generating a data channel;
• a step of generating a control channel that includes at least assignment information of the data channel;
• a step of generating part 0 information that includes information indicating the number of OFDM symbols used for the control channel;
• a step of mapping the part 0 information, the control channel, and the data channel,
• wherein, in the mapping step, the base station apparatus maps the control channel to a predetermined number of OFDM symbols from the start of a subframe formed by plural OFDM symbols, and maps the part 0 information to the subcarriers in a first OFDM symbol of the subframe such that the subcarriers do not overlap between cells in a frequency domain,
• two antenna transmission is performed by space frequency block coding, and
• the part 0 information generated in the step of generating the part 0 information is mapped to consecutive two subcarriers.