PROCEDURE AND DEVICE FOR JAMMING CALLS IN A CELLULAR MOBILE RADIO SYSTEM

摘要

The procedure is used to jam calls in a predefined geographic area included in a cell of a cellular mobile radio system. A jamming signal (B) is sent by means of controlled transmission means, in such a way as to jam at least partially a first logical signalling channel defined on a beacon channel. A second logical signalling channel set up on a radio signal (S) corresponding to the beacon channel, on which are transmitted information messages needed for a resource access procedure, is scanned. In the event of detection of predefined information transmitted in this second logical signalling channel, a command (ES) to stop transmission of the jamming signal (B) is generated.