Patent ID: 6195529
Filing Date: 2001-02-27
Classification: H04K,H04W

Abstract:
Transmission blocker to prevent transmitting activities of a mobile radio station, especially a mobile telephone, in a mobile radio system with a mobile radio network and with stationary base radio stations, with the base radio stations transmitting signals (S) as synchronization information for reception by the mobile radio station in order to allow the mobile radio station to transmit, including devices for generating and transmitting radio signals as interference signals (SS) in the frequency range of the relevant corresponding mobile radio network, in such fashion that synchronization of the mobile radio station with a base radio station by means of the signal (S) to be received by the mobile radio station and emitted by the base radio station and/or a decoding of the signal (S) transmitted by the base radio station can be prevented by the mobile radio station and/or recognition of the signal (S) emitted by the base radio station can be prevented by the mobile radio station in a protected area (that can be established by the interference signal (SS) whose interference signal power (PSS) and the transmission time of the interference signal (SS) can be set,whereby the device for generating and transmitting interference signals (SS) comprises an interference spectrum generating unit (SC), a radiating unit (AE), a control device (ST), and a power supply (SV), anda measuring unit (ME) is provided for measuring the power (PEN) to be received by the mobile radio station, and the interference signal power (PSS) of the interference signal (SS) can be controlled by the measured values received.