Method for deciding the distance threshold for a plurality of transponders

A wireless authorization system having at least one query node with at least one antenna, configured for operating an access restriction means, which is closed or activated in dependence upon the distance of at least one transponder of a plurality of transponders to the query node or to at least one antenna of the query node or to a predetermined point disposed in a geographically fixed manner thereto, wherein the plurality of transponders has at least two transponders;

• the wireless authorization system is being configured for:
• transmitting one first query signal from the query node and receiving respectively one first response signal from at least two of the plurality of transponders;
• carrying out a distance estimation for estimating an estimated distance using the first response signal received at the query node, or deriving or calculating at least one value correlated to the estimated distance from the first response signal received at the query node;
• determining a hierarchy of at least a partial quantity of the plurality of transponders on the basis of the first response signals, wherein places of the transponders in the hierarchy are determined by the estimated distance with a highest place in the hierarchy being assigned to a lowest estimated distance, or wherein the places of the transponders in the hierarchy are determined by the at least one value correlated to the estimated distance with the highest place in the hierarchy being assigned to the at least one value correlated to the estimated distance estimate corresponding to a lowest distance;
• and
• transmitting a second query signal from the query node and receiving at least one second response signal from at least one of the transponders of the partial quantity of the plurality of transponders, wherein among the at least one second response signal, at least one is from a transponder that has an upper place in the hierarchy and is configured to carry out at least one first distance determination using the at least one second response signal;
• wherein the at least one first distance determination determines the distance between the query node or the at least one antenna of the query node or the predetermined point disposed in a spatially fixed manner thereto, and the transponder of the plurality of transponders from which the second response signal was received and that has the upper place in the hierarchy;
• wherein the wireless authorization system is configured to carry out the at least one first distance determination with a higher precision than the distance estimate or a distance estimation based on the at least one first query signal or based on the at least one first response signal;
• and
• wherein the wireless authorization system is configured to grant or refuse an access or to operate the access restriction means including to activate, deactivate, to open, to close or to remove the access restriction means, and wherein the wireless authorization system is configured to not refuse the access or grant the access, deactivate, open or remove the access restriction means once a determined distance does not exceed a predetermined distance or lies within a predetermined distance range, or wherein the wireless authorization system is configured to refuse the access or not grant the access and to activate or close the access restriction mean if the at least one determined distance between the query node or the at least one antenna of the query node or the predetermined point exceeds the predetermined distance or lies outside the predetermined distance range.