Patent ID: 6641036
Filing Date: 2003-11-04
Classification: G06K

Abstract:
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 ncâ‰ 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.