Patent ID: 6958682

Claim:
Process for communication between a badge ( 10 , 20 ) and a vehicle ( 2 ) according to which a short range emitter associated with the vehicle emits a low frequency (LF) type signal in the direction of the badge ( 10 , 20 ) which responds by sending a first radio frequency (RF) type signal of longer range in the direction of the vehicle, characterized in that a search of the various badges present in the vehicle is carried out by emitting an RF type signal ( 26 ) by a corresponding emitter of the vehicle, this RF signal bearing a question posed to the badge for identification of this latter, and in that the badge responds by emission of a second RF type signal ( 28 ) bearing a response to the received question, and in which the vehicle emits within the vehicle the LF type signal and according to which in response to this signal, each badge having detected the emitted LF type signal, emits in its turn the second RF type signal, this signal comprising information permitting identifying the corresponding badge, characterized in that it comprises moreover the following steps: memorization of the list of badges having responded to a badge location by sending the LF type signal, emission of the RF type signal by the corresponding emitter of the vehicle, this signal being the bearer of the question posed to the badge for identification of this latter, sending the response with the second RF type signal from the badge toward the vehicle, comparison of the list of badges identified by the RF/RF type identification, with the memorized list of badges, so as to manage a list of badges present in the vehicle.