DISPOSITIF DE RADIOCOMMUNICATION CAPABLE DE FONCTIONNER SELON DEUX MODES, SIGNAL, PROCEDE DE COMMUNICATION, ET SYSTEME CORRESPONDANTS

摘要

The device has a mobile receiver receiving data and control channels while in radio communication type operation mode, where the channels are transmitted by a base station. The device operates in walkie-talkie type operating mode by directly exchanging data with other communication devices independent of the base station and transmitting a signal having useful data packet (24) and signaling data packet. Independent claims are also included for the following: (A) a digital signal for communicating between two radio communication devices (B) a process for communicating between two radio communication devices (C) a radio communication system comprising radio communication devices and base stations.