METHOD FOR PROTECTING A LIMITED LOCAL AREA AGAINST ELECTROMAGNETIC RADIATION EMITTED BY MOBILE RADIOTELEPHONE TERMINALS, RADIO STATION AND MOBILE RADIOTELEPHONE TERMINAL

摘要

In an area to be monitored artificial conditions are created by the targeted emission of first signalling information units which cause the mobile radiotelephone terminals to be detected to react by emitting second signalling information units. These second signalling information units are then processed for the purpose of detecting mobile radiotelephone terminals which have not been switched off.