A communication terminal apparatus is provided that is used in a CDMA radio communication system. In this apparatus, a resource allocation section (191) allocates first channel and second channel resources based on DPCCH transmission power and an offset value. A TFC Selection section (162) creates TFCs based on buffer amounts stored in buffers (161-1 through 161-N), and performs selection of usable TFCs (TFC Selection) based on first channel resources allocated by resource allocation section 191. A TFC decision section (163) decides on one TFC from among the usable TFCs based on DCH#1 through #N priority information. By this means, this apparatus can perform control so that the total transmission power of all channels does not exceed the maximum transmission power when there are uplink channels that are subject to TFC selection and uplink channels that are not subject to TFC selection.