The object of a radio terminal equipment is to achieve a highly accurate channel control and a favorable transmission quality. In order to achieve the object, in the radio terminal equipment, a channel controlling means is given in advance a period which accordingly makes both the processing and processing to be done to a transmission wave(s) by a radio station connected through a radio transmission line have lengths of time needed for the processes suitable for channel controlling and which is also suitable for a transmission system in a radio transmission line, and makes a radio wave received by a receiving means during the period the object of the processing. Therefore, a radio transmission system having the present invention applied adapts flexibly to various multiple access systems and modulation systems, and stably maintains the transmission quality of channels high, without having drastic restrictions on the configuration.