Communication control apparatus, communication control method, radio communication system and terminal apparatus

A radio communication system comprising a communication control apparatus and a plurality of terminal apparatuses that execute radio communication,

• wherein the communication control apparatus includes a communication control unit that sets a component carrier having a basic bandwidth and sets at least one extension band to be added to the component carrier to at least a part of an excess frequency band,
• wherein the plurality of terminal apparatuses include a first group of terminal apparatuses that support radio communication on the extension band, and a second group of terminal apparatuses that do not support the radio communication on the extension band, and
• wherein the communication control unit of the communication control apparatus transmits resource assignment information that is not changed depending on whether or not the extension band is set, for the second group of terminal apparatuses.

A terminal apparatus comprising:

• a radio communication unit that communicates with a communication control apparatus controlling radio communication performed on a component carrier having a basic bandwidth, the communication control apparatus setting at least one extension band to be added to the component carrier to at least a part of an excess frequency band;
• and
• a control unit that allows the radio communication unit to execute the radio communication according to resource assignment information received from the communication control apparatus in a format different depending on whether or not the extension band is set by the communication control apparatus.