HI-JACKED VEHICLE SEARCH-AND-INTERCEPT RADIO CHANNELS SYSTEM Russian patent published in 2004 - IPC

FIELD: centralized security systems. SUBSTANCE: security signaling devices mounted on vehicle have transmit-receive module connected by air with ground movable service radio network, for instance, GSM standard, and self-contained transmission device which generates code messages with information for identification and location of vehicle. Quick-action force vehicles are provided with installation for radio search of hi-jacked vehicles. Each said installation has search receiver, search transmitter sending code messages with information for "friend-or-foe" identification of vehicle and its location and vehicle-mounted direction finder connected by air with object terminals of vehicle. Retransmission-radio direction finding network takes bearings of search and self-contained transmitting devices and transmits information to central control station. Data acquisition and processing center exchanges information with said station and with radio network of ground movable service and provides identification, location and tracking of vehicles equipped with security devices and installations for radio direction finding of hi-jacked vehicles and transmits orders for interception of hi-jacked vehicles through retransmission-radio direction finding network to search receivers. EFFECT: improved capacity and noise resistance of system, and probability of interception of hi-jacked vehicles. 3 cl, 3 dwg