Method for identifying electronic labels by adaptive rounds
AssigneeTagsys SAS
InventorRichard Kalinowski
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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 ni of identifications, the number nv of windows or blank spaces and the number nc of collisions; (c) stopping the process if nc=0; or proceeding to step (d) if nc≠0; (d) calculating a number Ns1 of emitting windows for the next cycle on the basis of the values of Ns, ni, nv and nc; going back to step (a) with Ns=computed Ns1.
Claims16
A procedure for identifying electronic labels affixed on products using an electronic interrogation/read/write device wherein the electronic labels and the electronic device are each capable of receiving and transmitting messages, said procedure comprising the steps of:
- (a) indicating to the electronic labels the number Ns of consecutive transmission windows of a first cycle or round;
- (b) during the cycle of Ns windows, counting the messages received from the electronic labels in order to determine a number ni of identifications, a number nv of blank spaces or windows and a number nc of collisions;
- (c) stopping the procedure if nc=0 or passing to step (d) if nc≠0;
- (d) computing a number Ns1 of transmission windows for a next cycle on the basis of the values of Ns, ni, nv and nc;
- and
- (e) returning to step (a) with Ns=computed Ns1.
Dependencies are inferred from the claim text.