JPS5650639A - Mobile communication system - Google Patents

Abstract

PURPOSE:To secure an increment of the number of radio zones without increasing the control volume at the radio control station by providing the subordinate radio base station to the radio base station, at the same time maintaining a high quality for the circuit by avoiding the increment of the number of stages of the station. CONSTITUTION:The mobile station call number sent from the general telephone is sent to the radio controll station 2 via the automobile telephone exchange station 3 and then transmitted to the radio base stations 1 and 7. The station 7 calls out the corresponding mobile station 4 through the transmitters of its own station and the subordinate base station 8. The answer signal of the station 4 is received at the stations 1, 7 and 8 each, and the answer signal plus the reception field level are transmitted to the station 2 from the station 1 as well as from the station 8 to the station 7. At the station 7, the station 8 having the maximum level is selected among the signals from the station 8 and then transmits the fixed signal to the station 2. At the station 2, a comparison is given among several field levels and then the station of the maximum level is selected to set up the radio communication circuit to the station 4.