Radio communication system, radio base station apparatus, user terminal and radio communication method

A radio base station apparatus in a radio communication system, the radio base station apparatus comprising:

• a processor that generates a downlink control channel signal containing downlink control information including carrier indicator field information;
• and
• a transmitter that transmits the downlink control channel signal to a user terminal,
• wherein the carrier indicator field information is information that associates a carrier index and a number of subframes to schedule victim subframes, and
• wherein the transmitter transmits using time division duplexing, and the processor of the radio base station achieves broadbandization by carrier aggregation.

A user terminal in a radio communication system, the user terminal comprising:

• a receiver that receives a downlink control channel signal containing downlink control information including carrier indicator field information from a radio base station;
• and
• a processor that executes signal processing with respect to a downlink signal in accordance with the downlink control information,
• wherein the carrier indicator field information is information that associates a carrier index and a number of subframes to schedule victim subframes, and
• wherein a transmitter of the radio base station transmits using time division duplexing, and a processor of the radio base station achieves broadbandization by carrier aggregation.

A radio communication method in a radio communication system that achieves broadbandization by carrier aggregation, comprising the steps of:

• at a radio base station apparatus:
• generating a downlink control channel signal containing downlink control information including carrier indicator field information;
• and
• transmitting the downlink control channel signal to a user terminal;
• and
• at the user terminal:
• receiving the downlink control channel signal;
• and
• executing signal processing with respect to a downlink signal in accordance with the downlink control information,
• wherein the carrier indicator field information is information that associates a carrier index and a number of subframes to schedule victim subframes, and
• wherein a transmitter of the radio base station transmits using time division duplexing, and a processor of the radio base station achieves broadbandization by carrier aggregation.