MOBILE COMMUNICATION CONTROL SYSTEM

摘要

PURPOSE:To secure a communication route from a base station to a mobile station all the time by providing the mobile station with plural reception systems and using plural reception systems during channel switching. CONSTITUTION:A transmission part 10 and a reception part 11(RX1) or 12(RX2) are used during a call. This reception part varies the output frequency of a frequency syntheriser 24 under the command of a control part 26 and receives a radio wave of one optional radio frequency among radio waves sent from the base station. If the mobile station receives a speech signal of frequency fO1 during channel switching, a channel switching request and a switching destination channel number (frequency fN) are sent to the mobile station by using an out- band control signal (SVO) from the base station. Further, the base station sends a radio section continuity signal (RLP) of frequency fN1 to the mobile station so as to test the normalcy of a switching destination channel (fN). The normal station when receives the switching destination channel number (fN) with SVO of the channel of frequency fO1 places the receiver (RX2) which is not used so far in a reception state and sets it as the switching destination channel to wait for down RLP.