Patent ID: 6765884
Filing Date: 2004-07-20
Classification: H04B,H04W

Abstract:
A method for the transmission of a radioelectric mobile telephony decoy signal according to a CDMA type access protocol, in a limited geographical zone, wherein:a measurement is made, by means of a dummy receiver, in the limited geographical zone, of the power of one or more synchronization signals received in this limited geographical zone and transmitted by base stations of a mobile telephony network, a candidate signal is chosen from among the synchronization signals received for which the power value is the greatest in the limited geographical zone, the receiver is temporally synchronized with the chosen signal, a decoy signal that is the replica of the chosen signal is produced the decoy signal is amplified up to a power value that is strictly greater than a power value of the chosen signal, the decoy signal is sent inside the limited geographical zone by means of a dummy transmitter, the decoy signal being temporally desynchrorized with respect to the chosen signal and the other candidate radioelectric signals, a mobile telephone is radioelectrically connected with the dummy transmitter, the mobile telephone being inside the limited geographical zone.