To shorten changeover time at the time of performing line connection by high-speed transmission by plural time slots with another base station by re-calling type channel changeover and to reduce a call loss rate by a connection failure.

The base stations CS1, 2 and 3 transmit free time slot information through a control channel and the base stations 1-3 store the free time slot information. Thereafter, a base station identification code is transmitted to a PHS(personal handy phone system) terminal PS together with the free time slot information and the PHS terminal PS receives and stores the base station identification code together with the free time slot information from the base stations 1-3. Thereafter, communication channel changeover by re- calling accompanying the deterioration of a reception state where reception electric field strength is lowered is activated, control channel monitoring is executed, the base station 3 provided with maximum reception electric field strength and prescribed plural free time slots is selected and communication by the high-speed transmission is performed.