NON-CONTACT DATA CARRIERS INCLUDING AN ANTI-COLLISION SCHEME

摘要

Data carriers for inventorying by means of a communication station, whereby the communication station and each data carrier are brought into communicative connection, and each data carrier brought into communicative connection with the communication station is configured to generate a response signal that renders possible an inventorying of the data carrier and is capable of delivering a generated response signal with the use of a transmission start moment that can be selected from a plurality of transmission start moments, each data carrier tests whether another data carrier is already giving its response signal. Each data carrier is configured to discontinue the generation or delivery of its response signal if another data carrier is already providing its response signal.

主权项

1. A data carrier designed for contactless communication with a communication station and the data carrier comprises an integrated circuit, the integrated circuit comprises:
response signal generation means for generating a response signal, start moment selection means by which a transmission start moment can be selected from a plurality of transmission start moments, and response signal recognition means designed for recognizing a response signal given by another data carrier and for generating and delivering a response signal recognition signal and wherein delivery decision means are provided which release or block a delivery of the response signal in dependence on the response signal recognition signal and the transmission start moment, wherein the generation of the response signal is performed prior to modulating the response signal via modulation means for transmission.