Transponder communication device for the contactless communication with a plurality of individually selectable transponders, and transponder for the contactless communication with at least one transponder communication device
First Claim
1. A transponder communication device for providing contactless communication with a plurality of individually selectable transponders,includingtransponder selection means for the successive individual selection of transponders present within a receiving range of the transponder communication device and which are each in an active state,interrogation means, included in the transponder selection means, for generating at least one item of interrogation information by means of which transponders present within the receiving range and which are each in their active state are interrogated to generate and transmit answer information,transmission means for transmitting the at least one item of interrogation information to transponders present within the receiving range,receiving means for receiving answer information generated and transmitted by transponders present within the receiving range in response to the at least one item of interrogation information, anddeactivation means, included in the transponder selection means, for generating at least one item of deactivation information by means of which a transponder present within the receiving range and which is in its active state, upon its selection, is set to a state in which the transponder does not generate and transmit answer information in response to the at least one item of interrogation information,characterized in thatthe transponder selection means include time-window generating means for automatically generating a series of K successive time windows,control means for the time-window generating means have been provided, by which control means the time-window generating means are controlled and activated to generate the series of K time windows automatically a plurality of times in succession,the receiving means receives at least one item of answer information in at least one time window during each series of K time windows, andthe transponder selection means include evaluation means which cooperate with the time-window generating means and the receiving means, by which a transponder is selected in dependence upon the occurrence of at least one received item of answer information in at least one time window in each series of the series of K time windows generated a plurality of times in succession.
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Accused Products
Abstract
In a transponder communication device (1) having a selector for the successive individual selection of transponders (2) the selector having interrogator (5) for generating at least one item of interrogation information (AFI) with which the transponders (2) can be interrogated to transmit answer information (AWI) in response to the interrogation information (AFI), and time-window generator (17) for generating a series of K successive time windows (ZF) and controller (20) for the time-window generator (17), which controller can activate the time-window generator (17) so as to generate the series F of K time windows (ZF) a number of times in succession, and evaluator (22) which cooperates with the time-window generator (17) and by which, depending on the occurrence of at least one item of answer information (AWI) transmitted to the transponder communication device (1) by a transponder (2) in response to interrogation information (AFI), a transponder (2) can be selected in at least one time window (ZF) in each series (F) of the series (F) of K time windows (ZF) generated a number of times in succession.
12 Citations
19 Claims
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1. A transponder communication device for providing contactless communication with a plurality of individually selectable transponders,
including transponder selection means for the successive individual selection of transponders present within a receiving range of the transponder communication device and which are each in an active state, interrogation means, included in the transponder selection means, for generating at least one item of interrogation information by means of which transponders present within the receiving range and which are each in their active state are interrogated to generate and transmit answer information, transmission means for transmitting the at least one item of interrogation information to transponders present within the receiving range, receiving means for receiving answer information generated and transmitted by transponders present within the receiving range in response to the at least one item of interrogation information, and deactivation means, included in the transponder selection means, for generating at least one item of deactivation information by means of which a transponder present within the receiving range and which is in its active state, upon its selection, is set to a state in which the transponder does not generate and transmit answer information in response to the at least one item of interrogation information, characterized in that the transponder selection means include time-window generating means for automatically generating a series of K successive time windows, control means for the time-window generating means have been provided, by which control means the time-window generating means are controlled and activated to generate the series of K time windows automatically a plurality of times in succession, the receiving means receives at least one item of answer information in at least one time window during each series of K time windows, and the transponder selection means include evaluation means which cooperate with the time-window generating means and the receiving means, by which a transponder is selected in dependence upon the occurrence of at least one received item of answer information in at least one time window in each series of the series of K time windows generated a plurality of times in succession.
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10. A transponder for providing contactless communication with at least one transponder communication device and for being selected, when the transponder in an active state, by a transponder communication device,
including receiving means for receiving at least one item of interrogation information transmitted by a transponder communication device, interrogation detection means for detecting at least one item of received interrogation information, answer means for control by the interrogation detection means to generate answer information in response to received interrogation information detected by the interrogation detection means, transmission means for transmitting the answer information generated by the answer means, and deactivation means by means of which the transponder is set to a state in which the transponder does not generate and transmit answer information in response to interrogation information, characterized in that the answer means include time-window generating means for automatically generating a series of K successive time windows, control means for the time-window generating means have been provided, by which control means the time-window generating means are controlled and activated to generate the series of K time windows automatically a plurality of times in succession, and the answer means generate answer information in a time window of the series of K time windows.
Specification