A system and method for authenticating a terminal in a communication system is described. The method also includes determining a density of broadcast receiving devices associated with the broadcast transmission network in the broadcast target area, calculating an area for message broadcast transmission within the broadcast target area served by the broadcast transmission network, and determining a length of the broadcast message contained within the validated broadcast message record. Mobile stations periodically re-examine contents of this message. The UE fills the entries with corresponding START values, synchronizing the entry corresponding to the first domain to hold a value that is identical to the value of the START_VALUE_TO_TRANMIT variable.