A radio terminal apparatus is operable in a discontinuous communication mode in which at least one of transmission and reception for communicating with a radio base station is performed periodically and discontinuously. The radio terminal apparatus includes a measurement unit configured to measure time from when download of data via the radio base station is completed to when download of the next data is requested in response to a user operation, a transmitting unit configured to transmit time information on the time measured by the measurement unit to the radio base station, and a radio control unit configured to acquire, from the radio base station, a parameter indicating at least one of a transmission period and a reception period that is determined on the basis of the time information, and control the discontinuous communication mode.