System and method for the presence recognition of a second portable data carrier by a first portable data carrier

摘要

A system for recognizing the presence of a second portable data carrier by a first portable data carrier, wherein the data carriers have respectively a contactless interface with an antenna and an electronic circuit for storing and/or processing data. An RFID reading device supplies the data carriers with energy and for the respective communication of the data carriers with the reading device. In the first and the second data carrier there is respectively provided a further communication device, via which an additional, direct communication channel, independent of the field of the reading device, is made available between the first and the second data carrier, to thereby check the immediate presence of the second data carrier in the field of the reading device by the first data carrier.

主权项

1. A system for the presence recognition of a second portable data carrier by a first portable data carrier, wherein each of the first portable data carrier and the second portable data carrier comprises:
a contactless interface with an antenna and an electronic circuit configured to store or process data, wherein the system includes an RFID reading device that includes an antenna, wherein, in operation, a field is formed around the antenna and within the field the RFID reading device supplies the first portable data carrier or the second portable data carrier with energy and with a communication connection when the first portable data carrier or the second portable data carrier are nearby the RFID reading device, wherein, in the first data carrier and the second data carrier, a further communication device is respectively provided, via which an additional, direct communication channel, independent of the field of the reading device, is made available between the first data carrier and the second data carrier, to thereby enable checking for the immediate presence of the second data carrier in the field of the reading device by the first data carrier, and wherein the RFID reading device is permitted to read data stored in the first data carrier only when the presence of the second data carrier in the communication region of the direct communication channel have been proven by an authentication.