Automatic selection of Gateway, Repeater, or MS-MS communication in TETRA Direct Mode Operation (DMO)
Original Publication Date: 2003-Jan-30
Included in the Prior Art Database: 2003-Jan-30
Introduction to DMO MS-MS operation TETRA DMO offers the possibility of direct communication between DM-MSs, e.g. without the need of an intervening base station. It provides a simple and robust system which will allow communication in areas where there may be no V+D coverage. Introduction to DMO Gateway operation TETRA direct mode operation using a gateway offers the possibility of connecting DM-MSs to the V+D trunking system, or vice versa, in either an individual call or a group call. The gateway re-transmits information received from the DM-MS to the V+D system and vice versa. A gateway may broadcast information to mobile subscribers in periodic transmissions of a presence signal.