<p>The system has a set of transmission/reception antennas arranged at a set of different points inside a monitored access region and a vehicle connected to the electronic control device. A set of different part regions inside the monitored access region are defined with the control device. The control device includes an evaluation unit for the evaluation of received signals of the transmission/reception antennas to determine the different part regions in which the identification device is located, when an identification device is located within the access region.</p>
