Method for identifying electronic labels by adaptive rounds
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United States of America Patent
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Nov 4, 2003
Grant Date -
N/A
app pub date -
Mar 1, 2002
filing date -
Jun 25, 1999
priority date (Note) -
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Abstract
The invention concerns a method for identifying electronic labels affixed on products using a querying device, characterized in that it comprises the following steps which consist in: (a) indicating to the electronic labels the number Ns of consecutive emitting windows of a first cycle or round; (b) counting, during the first cycle of Ns windows, the messages received from the electronic labels to determine the number n.sub.i of identifications, the number n.sub.v of windows or blank spaces and the number n.sub.c of collisions; (c) stopping the process if n.sub.c =0; or proceeding to step (d) if n.sub.c.noteq.0; (d) calculating a number Ns1 of emitting windows for the next cycle on the basis of the values of Ns, n.sub.i, n.sub.v and n.sub.c ; going back to step (a) with Ns=computed Ns1.
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