FIGS. 1A and 1B show contiguous band allocation and non-contiguous band allocation;

FIG. 2 shows the numbers of signaling bits disclosed in non-patent literature 1;

FIG. 3 shows an example of the non-contiguous band allocation of the number of clusters M=2 using a technique disclosed in non-patent literature 1;

FIG. 4 is a main block diagram of a terminal according to Embodiment 1 of the present invention;

FIG. 5 is a main block diagram of a base station according to Embodiment 1 of the present invention;

FIG. 6 is a block diagram showing a configuration of a radio communication terminal apparatus according to Embodiment 1 of the present invention;

FIG. 7 is a block diagram showing a configuration of the base station according to Embodiment 1 of the present invention;

FIG. 8 shows an example operation of frequency resource allocation when a notification RBG index is associated with an allocation RBG index by equation 6;

FIG. 9 shows an example operation of the frequency resource allocation when the notification RBG index is associated with the allocation RBG index by equation 7;

FIG. 10 shows the number of signaling bits in Embodiment 1;

FIG. 11 shows the contiguous band allocation;