Transponder communication device for the contactless communication with at least one transponder, and transponder for the contactless communication with at least one transponder communication device
First Claim
1. A transponder communication device for contactless communication with at least one transponder, said transponder communication device comprising:
- interrogation means for generating at least one item of interrogation information by means of which a transponder present within a receiving range of the transponder communication device which is in an active state is interrogatable to generate and transmit answer information;
transmission means for transmitting the at least one item of interrogation information to a transponder present within the receiving range;
receiving means for receiving answer information generated and transmitted by a transponder present within the receiving range in response to the at least one item of interrogation information; and
deactivation 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 is settable 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,the deactivation means comprising a deactivation stage for generating deactivation information by means of which a transponder present within the receiving range, which transponder has already transmitted answer information in response to interrogation information in its active state, subsequently settable from its active state to a passive state, the deactivation means comprising a further deactivation stage for generating at least one item of further deactivation information by means of which a transponder present within the receiving range, which transponder has already transmitted answer information in response to interrogation information in its active state, subsequently settable from its active state to a standby state,the interrogation means comprising an interrogation stage for generating interrogation information by means of which a transponder present within the receiving range is settable from its passive state to its active state and, in addition, is interrogatable, when necessary, to again generate and transmit answer information, the interrogation means further comprising a further interrogation stage for generating further interrogation information by means of which a transponder present within the receiving range is settable from its standby state to its active state and, in addition, is interrogatable to again generate and transmit answer information, and the interrogation means still further comprising a still further interrogation stage for generating at least one item of further interrogation information by means of which a transponder within the receiving range, which transponder has already transmitted answer information in response to interrogation information in its active state, is interrogatable to again generate and transmit answer information without leaving the active state.
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Accused Products
Abstract
A transponder communication device has an interrogation signal generator for generating an interrogation signal, a transmitter for transmitting the interrogation signal to a number of transponders, and a receiver for receiving answers signal from transponders. A transponder has an interrogation signal detector, an answer signal generator, and a state setting controller for setting a state of the transponder. The transponder communication device selects a single transponder from the number of transponders. First, the transponder communication device transmits an initial interrogation signal is transmitted to all transponders when the transponders are in an active state. In dependence of answer signals received from the transponders, the transponder communication device transmits a standby setting signal to at least one transponder at a time to instruct the transponders to adopt a standby state. In the standby state the transponders wait until a single other transponders has been selected. Thereafter all unselected transponders are selected by first setting the unselected transponders into an active state, from the standby state. Selected transponders are set into a passive state until all transponders have been selected. Thereupon, the active state is restored for all transponders.
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Citations
17 Claims
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1. A transponder communication device for contactless communication with at least one transponder, said transponder communication device comprising:
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interrogation means for generating at least one item of interrogation information by means of which a transponder present within a receiving range of the transponder communication device which is in an active state is interrogatable to generate and transmit answer information; transmission means for transmitting the at least one item of interrogation information to a transponder present within the receiving range; receiving means for receiving answer information generated and transmitted by a transponder present within the receiving range in response to the at least one item of interrogation information; and deactivation 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 is settable 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, the deactivation means comprising a deactivation stage for generating deactivation information by means of which a transponder present within the receiving range, which transponder has already transmitted answer information in response to interrogation information in its active state, subsequently settable from its active state to a passive state, the deactivation means comprising a further deactivation stage for generating at least one item of further deactivation information by means of which a transponder present within the receiving range, which transponder has already transmitted answer information in response to interrogation information in its active state, subsequently settable from its active state to a standby state, the interrogation means comprising an interrogation stage for generating interrogation information by means of which a transponder present within the receiving range is settable from its passive state to its active state and, in addition, is interrogatable, when necessary, to again generate and transmit answer information, the interrogation means further comprising a further interrogation stage for generating further interrogation information by means of which a transponder present within the receiving range is settable from its standby state to its active state and, in addition, is interrogatable to again generate and transmit answer information, and the interrogation means still further comprising a still further interrogation stage for generating at least one item of further interrogation information by means of which a transponder within the receiving range, which transponder has already transmitted answer information in response to interrogation information in its active state, is interrogatable to again generate and transmit answer information without leaving the active state. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transponder for contactless communication with a transponder communication device and which, in an active state, is activated to communicate with the transponder communication device, said transponder comprising:
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receiving means for receiving at least one item of interrogation information transmitted by the transponder communication device; interrogation detection means for detecting at least one item of received interrogation information; answer means controllable 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 settable to a state in which the transponder does not generate and transmit answer information in response to interrogation information, the deactivation detection means comprising a deactivation detection stage for detecting deactivation information transmitted by the transponder communication device, by means of which the transponder, which in its active state has already transmitted answer information in response to interrogation information, is subsequently settable from its active state to a passive state, the deactivation detection means further comprising a further deactivation detection stage for detecting further deactivation information transmitted by the transponder communication device, by means of which the transponder, which in its active state has already transmitted answer information in response to interrogation information, is subsequently settable from its active state to a standby state, the interrogation detection means comprising an interrogation detection stage for detecting interrogation information transmitted by the transponder communication device, by means of which the transponder is settable from its passive state to its active state and, in addition, is interrogatable to again generate and transmit answer information, if necessary, the interrogation detection means further comprising a further interrogation detection stage for detecting further interrogation information transmitted by the transponder communication device, by means of which the transponder is settable from its standby state to its active state and, in addition, is interrogatable to again generate and transmit answer information, and the interrogation detection means still further comprise a still further interrogation detection stage for detecting still further interrogation information transmitted by the transponder communication device, by means of which the transponder, which in its active state has already transmitted.answer information in response to interrogation information, is interrogatable to again generate and transmit answer information without leaving the active state. - View Dependent Claims (8, 9, 10)
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11. A transponder communication device comprising:
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an interrogation signal generator for generating an interrogation signal; a transmitter for transmitting said interrogation signal to a plurality of transponders, said plurality of transponders each comprising an interrogation signal detector, an answer signal generator for generating an answer signal in response to a detected interrogation signal, and a state setting controller for setting a state; and a receiver for receiving said answer signal, said transponder communication device being configured to select a single transponder of said plurality of transponders by transmitting of an initial interrogation signal to said plurality of transponders when being in an active state, and by, in dependence of received answer signals from said plurality of transponders in response to said initial interrogation signal, at least once transmitting of a standby state setting signal to at least one transponder of said plurality of transponders at a time so as to instruct transponders for which said standby state setting signal is intended to adopt a standby state for being standby for interrogation after selection of said single transponder, said single transponder having been selected after all other transponders of said plurality of transponders have been eliminated by adopting said standby state. - View Dependent Claims (12, 13, 14)
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15. A transponder comprising:
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an interrogation signal detector for detecting an interrogation signal generated by and received from a transponder communication device that selects a single transponder of a plurality of transponders including said transponder by transmitting an initial interrogation signal to said plurality of transponders when being in an active state; an answer signal generator for generating an answer signal in response to a detected interrogation signal; and
a state setting controller for setting a state,said state setting controller setting said transponder into a standby state when receiving a standby state setting signal from said transponder communication device so as to eliminate said transponder from selection until selection of said single transponder, and setting said transponder into said active state, after said single transponder has been selected, when receiving an active state setting signal from said transponder communication device so as to re-instate said transponder for selection. - View Dependent Claims (16, 17)
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Specification