The invention relates to a method and system for controlling and analyzing cellular radio communications exchanged between mobile terminals and base stations BTS. The invention is characterized in that a dummy mobile terminals and base stations BTS. The invention is comprising a dummy mobile telephone network RRTM_F comprising a dummy base station BTS_F and a dummy mobile terminal MS_F are inserted into the real network RRTM_R, said dummy network being responsible for the decoding and transparent synchronous relaying of messages exchanged between the real network and the real mobile as well as real mobile access control from the real network or the dummy network.