A method of locating a mobile station in a mobile telephone system

A MOBILE TELEPHONE SYSTEM HAS IN A CELL (C1) A BASE STATION (EB1) AND SUB-STATIONS (MT1, MT2, MT3) WHICH ARE CONNECTED TO A MOBILE SWITCHING CENTRAL (CCM) BY MEANS OF CABLES (2). THE MOBILE PHONE SYSTEM HAS CONTROL CHANNELS (CC) AND FREQUENCIES WHICH ARE DIVIDED IN TIME FOR TRAFFIC CHANNELS. SOME OF THE FREQUENCIES ARE CHOSEN AS IDENTIFICATION FREQUENCIES. EACH OF THE SUB-STATIONS (MT1, MT2, MT3) ARE ASSIGNED TO A SINGLE GROUP OF FREQUENCIES AMONG THE IDENTIFICATION FREQUENCIES AND CONSTANTLY TRANSMIT THEIR RESPECTIVE GROUP OF FREQUENCIES. A MOBILE STATION (EM) A CONNECTED TO THE BASE STATION (EB1) DETECTS THE IDENTIFICATION FREQUENCIES AND REPORTS THE STRONGEST OF THESE FREQUENCIES TO THE MOBILE SWITCHING CENTRAL (CCM). THE MOBILE SWITCHING CENTER COMPARES THE FREQUENCIES REPORTED WITH THE ONLY GROUP OF FREQUENCIES, COMPARES THE STRONG SIGNAL INFORMED WITH THRESHOLD VALUES AND SELECTS THE NEAREST SUB-STATION (MT2) TO PASS IT. THE MOBILE SWITCHING CENTRAL (CCM) FROM THE BASE STATION (EB1) TO A CONNECTION (4) WITH THE SUB-STATION (MT2). THE MOBILE STATION (EM) CONTINUES DETECTING THE FREQUENCIES OF IDENTIFICATION AND REPORTS OF THE SIGNAL STRENGTH OF ITS CONNECTION (4). WHEN THE SIGNAL STRENGTH OF THE CHOSEN SUB-STATION (MT2) IS LOW, THE CONNECTION (4) IS SWITCHED BACK TO THE BASE STATION (EB1).