Patent ID: 8022813
Filing Date: 2011-09-20
Classification: G06K

Abstract:
1. A method of consecutively inventorizing a plurality of data carriers, wherein a communication station interacts in a contact-free way with the plurality of data carriers, the method comprising: generating identification signals with the plurality of data carriers that are present in a communication area of the communication station; delivering the generated identification signals using transmission parameters, selectable from a plurality of transmission parameters, to the communication station; receiving the delivered identification signals with the communication station; generating and delivering, with the communication station, after an unambiguous reception of an identification signal of a particular data carrier in an initial inventorizing procedure, an acknowledgement command, wherein a detection of a collision prevents generation of any acknowledgement command; receiving and processing, with the particular data carrier, the generated and delivered acknowledgement command; and delivering, in response to the received and processed acknowledgement command, during a subsequent inventorizing procedure, a response signal using a predetermined transmission parameter to the communication station, wherein the predetermined transmission parameter is different from the plurality of transmission parameters from which transmission parameters can be selected to transmit the identification signals to the communication station.