Patent ID: 8441534
Filing Date: 2013-05-14
Classification: G08B

Abstract:
1. A circuit for a data carrier, wherein the data carrier comprises data carrier transmission means configured to perform a contact-less communication with a read/write station, wherein the circuit comprises interface means configured to cooperate with the data carrier transmission means, and wherein the circuit comprises storage means configured to store status data for indicating whether an electronic article surveillance status is active or not active and to store zone data for specifying at least one electronic article surveillance zone to which the electronic article surveillance status is assigned, and wherein the circuit comprises test means configured to receive from the interface means reception data, wherein the reception data are generate-able during a contact-less communication with the read/write station and wherein the reception data represent an electronic article surveillance status test-request command comprising test information, wherein the test information indicates an electronic article surveillance zone for which the electronic article surveillance status that is assigned to said indicated electronic article surveillance zone is to be tested, and to test whether the status data indicate that the electronic article surveillance status is active for the indicated electronic article surveillance zone, and, in the case that the electronic article surveillance status is active for the indicated electronic article surveillance zone, to generate test result representation data that represent that the electronic article surveillance status is active for the indicated electronic article surveillance zone, wherein the zone data is structured as a zone data field, wherein a first zone identifier is stored in a group of the most significant bits of the zone data field, wherein the first zone identifier identifies a first article surveillance zone at which the data carrier is located, wherein a second zone identifier is stored in a group of lower significant bits of the zone data field, wherein the second zone identifier identifies a second article surveillance zone at which the data carrier is located, wherein the second article surveillance zone contains the first article surveillance zone, wherein a third zone identifier is stored in a group of the least significant bits of the zone data field, wherein the third zone identifier identifies a third article surveillance zone at which the data carrier is located, wherein the third article surveillance zone contains the second article surveillance zone, wherein the first, second and third article surveillance zones are different from each other, and wherein the group of lower significant bits is positioned between the group of the most significant bits and the group of the least significant bits.