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

A base station apparatus for performing radio communication with a terminal apparatus, the base station apparatus comprising:

• a scheduler configured to divide each of a plurality of radio frequency bands used for the radio communication between the base station apparatus and respective ones of terminal apparatuses into first and second sub-bands of which respective bandwidths are different;
• configured to notify respective terminal apparatuses, individually or all the terminal apparatuses commonly at the same time or in advance, of bit map definition information that indicates how the radio frequency band is divided;
• configured to assign one or both of the divided first or second sub-band for transmitting user data to the terminal apparatus or for transmitting the user data from the terminal apparatus;
• and configured to generate assignment information as part of the bit map definition information indicating which one of the first or second sub-bands is assigned to each terminal apparatus;
• and
• a transmitter configured to transmit the assignment information to the terminal apparatus.

A radio communication method for a radio communication system for performing radio communication between a base station apparatus and a terminal apparatus, the method comprising:

• dividing by the base station apparatus a radio frequency band used for the radio communication into first and second sub-bands of which respective bandwidths are different,
• notifying respective terminal apparatuses individually or all the terminal apparatuses commonly at the same time or in advance, bit map definition information to indicate how the radio frequency band is divided,
• assigning one or both of the divided first or second sub-band for transmitting user data to the terminal apparatus or for transmitting the user data from the terminal apparatus,
• generating assignment information of a bit map indicating which one of the first or second sub-band is assigned to each terminal apparatus;
• transmitting by the base station apparatus the assignment information to the terminal apparatus;
• and
• receiving by the terminal apparatus the assignment information.