Abstract: A radio communication system supplied by a battery, comprising at least one emitter and a receiver. The receiver operates in an intermittent manner between an active mode and a stand-by mode. The receiver has a frequency of intermittent operation such that the time in the active mode is the shortest possible time. The emitter emits at least one short field to the receiver, this field comprising minimum information for the initialization of a communication such that the time for stabilization of the receiver is compatible with the time in the active mode.