Method of reading a plurality of non-contact data carriers, including an anti-collision scheme

摘要

A method of inventorying data carriers (DC-A, DC-B), which method comprises the following steps: choosing from a plurality of transmission start moments in reference to a start point in time (0, t4) a transmission start moment for starting a transmission of a carrier signal (RF) for the purpose of supplying data (ID) to the communication station (STATION) during a transmission of said carrier signal (RF), and testing whether another data carrier (DC-A, DC-B) is already transmitting a carrier signal (RF) after said start point in time (0, t4) and prior to said chosen transmission start moment, and inhibiting the starting of said transmission of said carrier signal (RF) at said chosen transmission start moment if the result of said testing is positive.