Transponder communications device

the This invention relates to a transponder communication device, the for contactless communication with at least one in a present lobby of the transponder communication device is formed transponder, comprising: means for prompt Generating at least one interrogation information, which with the located in an active state transponder for generating and transmitting is aufforderbar of response information sending means for sending the at least one interrogation information to the transponder and receiving means for receiving response information as In response to the at least one interrogation information from the transponder is generated and sent.

furthermore the invention relates to a transponder for contactless Communicate with at least one transponder communication device is formed and in an active state for communicating with a transponder communication device is enabled, comprising: receiving means for receiving at least a transmitted by a transponder communication device Prompt information and prompt-detecting means for detecting at least a received request information, the interrogation detection controllable response means for generating answer information as Response to received and the interrogation detection detected request information sending means for sending the produced with the response means response information.

A The transponder communication device in the first paragraph cited Art and a transponder of the listed initially in the second paragraph Art have already been placed on the market and are therefore known. For example may regard such a known transponder communication device and terms of such a known transponder on the document <patcit><text>US 5339073</text></patcit> pointed will.

<patcit><text>US 5339073</text></patcit> discloses a Access control system that includes an interrogation unit, the an interrogation signal outputs, and a plurality of transponders, each transponder having a stored identity code, extending from the other transponder is different. This identity code contains a Variety of fields, each holding a selected information bit. The interrogation signal is controlled so that the fields simultaneously all lying in the region transponders are serially interrogated. From any transponder, the polled in the field a having Bitübereinstimmung, required by the interrogation signal, is sent to the interrogation unit a group response signal returned. The interrogation unit is formed from the series of received reply signals the identity each valid, to determine in the field lying transponder.

On Another example of the prior art, the mentioned Art is <patcit><text>US 5345231 A</text></patcit>That explains that for the case that more known transponder in the reception area of ​​a known transponder communication device are, the problem of the individual selection of each the known transponder results. This custom Select can using Selektiermitteln a known transponder communication device accomplished be that this have prompt means by which at least one interrogation information can be generated and sent, by which each of the reception area a known transponder communication device present Successively transponder for generating and transmitting a response information to prompted the known transponder communication device can be. In the known transponder communication device is in this case the presence of several per in-an active state Transponder using a presence protocol found where in after the detection of multiple transponders lobby the transponder communication device starts a query, whether a transponder of a half of the total number of transponders is within range of the transponder communication device. This is done by the Transponder communication device transmits an interrogation protocol. When a transponder or more respondents from half of the total number are of transponders in the reception range of the transponder communication device, so respond to these transponders each present in their active state by sending their individual codes and some test bits to the transponder communication device. This makes each individual code generated in a respective transponder and sent by the relevant transponder response information. If only one transponder responds, this transponder is thus already selected.

If however, several transponders respond, this results in a superposition of answer information, which in conjunction with the check bits in the detected the transponder communication device is. Then starts the transponder communication device a further interrogation, said half of the above-mentioned total number of transponders again reduced to half is. This process is repeated until only one transponder responds. If a query towards responds no transponder, so the process is repeated with the subdivision of the Komple&lt;?page 3?&gt;mentary transponder group continued. If a transponder has been selected, then its re-triage during prevents a subsequent Selektiervorganges by the Transponder communication device provided for deactivating agent generate deactivation information, with a Receptionist Present transponder after his triage of its active state can be brought into a state in which it no response information generated in response to a prompt information and sends, so that ensures is that a already selected transponder only selected again again can be, after all the other in the lobby of the transponder communication device located transponders were selected.

at a known transponder communication device and at a known transponder is assumed that each transponder at its entry into the reception area of ​​the transponder communication device in its active state and as long as in its active state lingers until the transponder is selected, after which the transponder is put into a state in which it no response information may issue a prompt information. Due to the front their triage lingering in their active state transponder it may, particularly if a relatively large number of transponders is within range of the transponder communication device, disturbances in the communication with the transponder communication device come what disadvantageous and undesirable is. In the case of active transponders, one for their energy supply contain integrated power source, leads the residence of a transponder in its active state, wherein the transponder for a relatively long period of time not active or his needs, to an unnecessary energy consumption, which also disadvantageous and undesirable is.

the Invention has for its object, in a transponder communication device of listed in the first paragraph Kind and in a transponder of the listed initially in the second paragraph Art cited the above to eliminate problem and an improved transponder communication device and to provide an improved transponder, which always trouble-free and proper communication is achieved, by which the operating state a transponder to easily and safely to different communication needs adjusted can be.

to solution the above-mentioned Tasks is a transponder communication device of the above in the first paragraph type according to the invention in that: <ul><li>- the Transponder communication device deactivation means for generating at least one disabling information includes, with the in his Active state contained transponder in a state controlled is, in which the transponder no response information in response generated on the at least one interrogation information and transmits</li><li>- the Deactivation means include a deactivation stage, for Generating formed a deactivation information, with the the transponder in response to its active state in a Prompt information already sent a response information has, then controlled from its active state to a sleep state is,</li><li>- the Deactivation means include a further deactivation stage, the adapted to generate at least one further deactivation information is with which the transponder, which in its active state in response to a call information already answer information has sent, then from its active state to a waiting state is controllable,</li><li>- the Prompt means an interrogation stage included that for generating a request information is formed, with which a transponder controllable from its sleep state to its active state and additionally optionally to again generate and transmit answer information aufforderbar is,</li><li>- the Requesting means further interrogation stage included the is adapted to generate a further interrogation information, with the transponder from its standby state to its active state controllable and additionally to again generate and transmit answer information aufforderbar is,</li><li>- the Prompt means listed further interrogation stage, used to generate at least a further interrogation information is formed with which the transponder, which in its active state in response to a request of information already answer information has sent, without leaving the active state to again Generate and transmit answer information is aufforderbar.</li></ul>

With the agents is achieved in a simple manner that a number of a transponder communication device according to the invention Control information generated and to everyone in the lobby of sent transponder communication device transponders present can be, easily control in different states to each transponder to be able to the different communication needs between the transponder&lt;?page 4?&gt;the communication device and each transponder present in its lobby correspond. The possibility, controlling a transponder in its wait state, provides the Advantage that, for example, while a Selektiervorganges, in which with the transponder communication device from a plurality of transponders, a single transponder individually to be selected, all while such Selektiervorganges unneeded transponder in their Wait state can be controlled and they therefore influence the selection process does not adversely can. Such a wait state of a transponder also includes, where appropriate, the advantage that in one located in its waiting state transponder in comparison condition to its active state significantly reduced energy use is.

at a transponder communication device according to the invention has proved to be advantageous if the transponder communication device further evaluation includes, which cooperate with the receiving means and the detection means included, which are formed, in dependence on the occurrence of at least a message sent from the transponder received response information at least one detection information to generate and deliver, wherein depending on the Occurrence of detection information further deactivation stage the deactivation means for generating at least one further Deactivation information is arranged. In this manner, an error-free and simply generating a further deactivation information achieved.

at a transponder communication device according to the invention has proved to be advantageous if the transponder communication device further evaluation includes, which cooperate with the receiving means and the detection means included, which are formed, depending on the occurrence of at least one transmitted by the transponder received response information at least one detection information to generate and deliver, wherein depending on the Occurrence of detection information that further interrogation stage the interrogation means for generating at least yet another Prompt information is arranged. In this manner, a error-free and simple generation of yet another interrogation information achieved.

at inventive transponder communication devices, as listed in the two paragraphs listed above, has proven advantageous proved if the transponder communication device further selection means includes, which cooperate with the evaluation means and which are arranged, at least one delivered by the evaluating detection information to be processed, and which are arranged corresponding to the at least a said selection supplied Detection information further deactivation stage for generating at least one further deactivation information to activate. Using the selection means may be selected in a simple manner, which further Deactivation information is to be generated.

at one cited in the preceding paragraph embodiment of a transponder communication device has proven to be very advantageous if selection means cooperate with the evaluation means and if one of the evaluation means output detection information is supplied to the selection means and if the further interrogation stage in accordance with a said selection supplied Detection information using the selection means for generating a is yet another interrogation information activated. With the help of selection means may be selected in a simple manner, which further Prompt information is to be generated.

at a transponder communication device according to the invention having evaluation has further proved to be advantageous, if the transponder communication device further means comprises which cooperate with the evaluation means, and the depending sent received from the occurrence of ge of only one transponder response information configured for generating a first control information are about the said deactivation information by means of the deactivation stage to create. This permit the further means, the generation of deactivation information adjust in a simple way to different circumstances.

at a listed in the preceding paragraph invention the transponder communication device has proved to be advantageous if further means are further for generating a second control information in dependence the occurrence of a received transmitted from one transponder Response information are formed and when the other with the Funds generated second control information further interrogation stage the prompt means for activating the generation of further Prompt information supplied is. In this way, with the further means generating the further Interrogation information in a simple manner to different adapted conditions will.

at one embodiment a transponder communication device of the invention with other means commensurate with the training mentioned in the two preceding paragraphs has also proved to be very advantageous if &lt;?page 5?&gt;the other Means are constituted by data communication means by which dependent on from a message sent from one transponder received occurrence Answer information data communication with data communication means this transponder feasible is and where after the completion of such data communication Control information can be generated and can be emitted. This will be the already existing data communication means in addition to the Generating at least one control information used.

at a transponder communication device according to the invention having evaluation containing detecting, has proven to be proved very advantageous if said detecting formed are to detect an operating case in which to the receiving means receive transmitted from the transponder response information was, and said detecting means for generating and outputting a further Detection information are formed in detecting this operating scenario and in response the occurrence of further detection information, the interrogation stage is adapted to generate said interrogation information. This achieves in a simple manner that in the event that no Response information has been received, automatically again the interrogation information is generated.

at a listed in the preceding paragraph invention the transponder communication device has also proved to be very advantageous if between the detection means and the interrogation stage of the interrogation means Activating agents are added and if the of the detection means given further detection information to the activation means fed and when the request corresponding to the level the activation means supplied enabled further information using the activating agent can be to generate the prompt information. With the help of Activating agent, the interrogation stage in a simple manner dependent on are activated by different activation criteria.

at all aforementioned inventive transponder communication facilities has proved to be advantageous if means are provided, with those from a plurality of transponders, a transponder individually is selectable. This allows a transponder communication device according to the invention in a simple and secure manner an individual selecting performed transponders will.

to solution the above-mentioned Tasks is a transponder of the listed initially in the second paragraph Art According to the invention characterized, that: <ul><li>- of the includes transponder deactivation detecting means by which the transponder can be controlled in a state in which the transponder does not Response information in response to a call information generates and transmits,</li><li>- the Deactivation detecting means a deactivation detection which encodes, for detecting by a transponder communication device deactivation of transmitted information is formed, which with the Transponder in its active state in response to a call information has already sent a response message, then from his Active state is controllable in a sleep state,</li><li>- the Deactivation detecting means further deactivation detection which encodes, for detecting by a transponder communication device sent further deactivation information is configured with of the transponder on in its active state in response a Aufforderungsin already formation response information sent has, then controlled from its active state to a waiting state is,</li><li>- the Interrogation detection contain an interrogation detection, the means for detecting of a transponder communication device transmitted interrogation information is formed, which with the Transponder controllable from its sleep state to its active state and additionally where appropriate, to again generate and transmit answer information is aufforderbar,</li><li>- the Interrogation detection further interrogation detection which encodes, for detecting by a transponder communication device sent further interrogation information is configured with of the transponder from its standby state to its active state controllable and additionally aufforderbar to again generate and transmit answer information is and</li><li>- the Interrogation detection still further interrogation detection which encodes, for detecting by a transponder communication device transmitted, still further interrogation information is formed, with the transponder, which in its active state in response to a call information already answer information has sent, without leaving the active state to again is generate and transmit answer information aufforderbar.</li></ul>

With the agents is achieved in a simple manner, that with a transponder according to the invention a plurality of control information can be processed to the transponder to be able to easily control in various operating conditions, the different Kommunikationsbe&lt;?page 6?&gt;dürfnissen between the transponder and a transponder communication device correspond. With Using the compositions of the invention will continue advantageously achieved that an inventive transponder in an active state, and from the active state to a sleep state and from the active state to a standby state, and vice versa from the sleep state to the active state, and from the waiting state can be controlled to the active state. The possibility of a transponder according to the invention to control in its wait state, has the advantage that, for example, while a Selektiervorganges, in which with a transponder communication device from a plurality of transponders, a single transponder individually to be selected, all during a such Selektiervorganges unneeded transponder in their Wait state can be controlled and consequently influence the selection process does not adversely can. Such a wait state of a transponder also includes, where appropriate, the advantage that in one located in its waiting state transponder in comparison condition to its active state significantly reduced energy use is.

at a transponder according to the invention has proved to be advantageous if the deactivation detection for generating and outputting state information for a formed detecting said deactivation information is, wherein the state information is provided to the transponder to bring from its active state to its passive state, and when a state memory is provided for storing the state information is arranged with the transponder can be kept in its sleep state. In this manner, an inventive transponder easy and safe from its active state to its passive state be brought and kept in its sleep state.

at one cited in the preceding paragraph inventive transponder has proved to be very advantageous if the passive state memory using the interrogation detection after detecting a call information can be erased. To this Instance, such a transponder very easily from its sleep state be returned to its active state.

at a transponder according to the invention has also proved to be very advantageous if he continues Means for generating and delivering standby state information comprising the cooperate with the further deactivation detection and which are arranged, upon activation by the transponder further Deactivation detection from its active state to its standby state bring, and a standby state memory comprises arranged that to store wait state information with which the transponder in its wait state can be maintained. In this manner, a inventive transponder very easy and safe from its active state to its standby state be brought and kept in its standby state.

It has also proved to be very advantageous if the additional Deactivation detection by further interrogation detection is formed and the further interrogation detection with Means cooperating to generate and output of standby state information, which last-mentioned means are arranged from the transponder to bring its active state to its standby state, and when a standby state memory is provided, which is arranged which to store wait state information with which the transponder in its wait state can be maintained. In this way it is achieved, that further Interrogation detection not only for requesting a transponder for generating and transmitting a response information, but also in addition used for placing a transponder in its wait state can be.

at as mentioned in the two preceding paragraphs transponders according to the invention has proved to be very advantageous if the standby state memory using the interrogation detection after detecting a prompt information and using the further interrogation detection erasable after detecting a further interrogation information. In this way, such a transponder in a simple manner out of its Wait state be returned to its active state.

at all aforementioned transponders invention has proved to be advantageous if means are provided, with which, in cooperation with a transponder communication device, from a plurality of transponders an individual transponder selectably is.

the aforementioned And further aspects of the invention emerge from the following Described embodiments produced and will be explained with reference to these embodiments.

the Invention is shown in the drawings in the following with reference to some embodiments described in more detail, but to which the invention is not limited.

<figref idrefs="S47">1</figref> shows schematically a transponder&lt;?page 7?&gt;the communication device according to a first embodiment of the invention, the deactivation means for generating deactivation information for disabling transponders and interrogation means for generating of prompt information to activate transponders and for requesting the transponder for sending response information having.

In <figref idrefs="S47">1</figref> is based on the first embodiment the transponder communication device according to the invention further indicated as a transponder communication device in accordance with a second and a third embodiment may be formed of the invention.

<figref idrefs="S48">2</figref> shows a transponder according to a first embodiment the invention, the deactivation detecting means for disabling the transponder and interrogation detection to activate the transponder and for prompting the transponder to send having a response information.

In <figref idrefs="S48">2</figref> is based on the first embodiment the inventive transponder further indicated how a transponder according to a second and a third Embodiment of Invention may be embodied.

<figref idrefs="S49">3A</figref> to <figref idrefs="S49">3L</figref> show schematically shows time diagrams of information and time windows, in accordance with the transponder communication device <figref idrefs="S47">1</figref> and according to the transponder <figref idrefs="S48">2</figref> occur.

In <figref idrefs="S47">1</figref> is a transponder communication device <figref>1</figref> shown, the for contactless communication with at least one transponder <figref>2</figref> scheduled is. In the present case, the transponder communication device<figref>1</figref> to the contactless communication with a plurality of individually selectable transponders <figref>2</figref> provided, of which a transponder <figref>2</figref> in <figref idrefs="S48">2</figref> illustrated is. Subsequently to the formation of the first transponder communication device<figref>1</figref> according to <figref idrefs="S47">1</figref> are explained in detail.

the Transponder communication device <figref>1</figref> contains a microcomputer <figref>3</figref>With which a variety of means and Functions are implemented, will be discussed below only partially closer to the. Subsequently, from the microcomputer with the <figref>3</figref> unrealized Resources and functions, only those described in more detail, in the present Connection are essential.

With the microcomputer <figref>3</figref> are Transponderselektiermittel <figref>4</figref> realized, which for successively selecting individual in a Lobby of the transponder communication device <figref>1</figref> present, located in an active state transponders <figref>2</figref> scheduled are. The Transponderselektiermittel<figref>4</figref> contain prompting means <figref>5</figref>. designed for generating the at least one interrogation information AFI are, with the reception area of ​​the transponder communication device <figref>1</figref> present, which are in its active state transponder <figref>2</figref> to produce and sending a response information AWI are aufforderbar. The least an insurance, together with the Aufforde <figref>5</figref> Prompt information generated AFI is an output <figref>6</figref> the microcomputer <figref>3</figref> fed.

From the output <figref>6</figref> is the prompt means <figref>5</figref> generated Interrogation information AFI transmission means <figref>7</figref> fed, the for sending the interrogation information AFI in reception present transponder <figref>2</figref> are provided and designed. The transmitter means <figref>7</figref> contain a modulator <figref>8</figref>. which is formed in known manner as a pulse width modulator. As a modulator but may also be a phase modulator or a frequency modulator be provided. The modulator<figref>8</figref> is ready to receive a clock signal TS designed for whose generation the transponder communication device <figref>1</figref> a Clock signal generator <figref>9</figref> having. A to the modulator<figref>8</figref> modulated Prompt information AFI is a transmission amplifier <figref>10</figref> fed, the increased modulated interrogation information to a coil stage <figref>11</figref> supplies, the transmission coil a <figref>12</figref> contains the in a known manner with a transponder in a <figref>2</figref> provided transmission coil cooperates inductively.

the Transponder communication device <figref>1</figref> has continued to receiving means <figref>13</figref> on the receiving response information AWI, which in response to a previously by the transponder communication device <figref>1</figref> transmitted Interrogation information AFI from the lobby of the transponder communication device <figref>1</figref> present transponders <figref>2</figref> be generated and transmitted, is provided and are formed. The receiving means<figref>13</figref> also contain the coil stage <figref>11</figref>Associated with the transmit coil <figref>12</figref> is equipped with of the reception operation of a transmission coil of a transponder <figref>2</figref> sent Answer information AWI receivable. With the transmitting coil<figref>12</figref> received Answer information AWI are a receiving amplifier <figref>14</figref> the receiving means <figref>13</figref> fed. With the receiver amplifier <figref>14</figref> amplified modulated Response information is a demodulator <figref>15</figref> fed, the is formed for example as synchronous and with the supplied to it, normally amplitude-modulated response information is demodulated. demodulator <figref>15</figref> can, like the modulator <figref>8</figref> the Clock signal TS of the clock signal generator &lt;?page 8?&gt;<figref>9</figref> receive. at another transmission mode can also be provided in other suitable demodulator.

the with the microcomputer <figref>3</figref> unrealized Transponderselektiermittel <figref>4</figref> contain further deactivation agent <figref>16</figref>With which a Receptionist the transponder communication device <figref>1</figref> Present, in an active state befindli cher transponder <figref>2</figref> after his Triage controllable from its active state to a sleep state is, in which the transponder <figref>2</figref> No reply information AWI in response to the at least one interrogation information AFI creates and sends.

at the transponder communication device <figref>1</figref> contain Transponderselektiermittel <figref>4</figref> advantageously additionally time window generating means <figref>17</figref>. the successive to generate a series F of K time windows ZF are provided and designed. In the present case the time-window generating means<figref>17</figref> to the successive generation of four time windows ZF 1, ZF 2, ZF 3 and ZF 4 provided. The time-window generating means<figref>17</figref> give at its output <figref>18</figref> Signals or information from the set the four time windows ZF 1, ZF 2, ZF 3 and ZF 4. to produce the time window ZF 1, ZF 2, ZF 3 and ZF 4 is the time window generating means <figref>17</figref> the Clock signal TS of the clock signal generator <figref>9</figref> fed, and via a first input <figref>19</figref> the microcomputer <figref>3</figref>, To control the generation of the time window ZF 1, ZF 2, ZF 3 and ZF 4 continue to control means <figref>20</figref> for the time-window generating means <figref>17</figref> provided. The control means <figref>20</figref> included here suitably the prompt means <figref>5</figref> and further a gate stage <figref>21</figref>. which by the interrogation means <figref>5</figref> producible prompt information AFI fed are, and to generate and output a call identifier AFK is formed. The call identifier AFK is the time window generating means<figref>17</figref> for the purpose of Control of these funds fed. In this way it is achieved that the control means <figref>20</figref> at the Delivering a prompt information through the interrogation means <figref>5</figref> the Time window generating means <figref>17</figref> for generating a sequence drive of K = 4 time windows ZF and activate. Furthermore, thereby achieved that by several times successively generating an interrogation information AFI the control means <figref>20</figref> cause the time-window generating means <figref>17</figref> multiple times are sequentially driven and activated and thus several times sequentially generate the sequence of K = 4 time windows ZF.

at the transponder communication device <figref>1</figref> during each Series of K = 4 time windows ZF the receiving means <figref>13</figref> in at least one time window ZF 1, ZF 2, ZF 3 or ZF 4 at least one Answer information AWI received, after which described in detail hereinafter is.

at the transponder communication device <figref>1</figref> contain discrimination means <figref>4</figref> advantageously additionally even with the time-window generating means <figref>17</figref> and the receiving means <figref>13</figref> cooperating evaluation <figref>22</figref>With which dependence in depen the occurrence of one from a transponder <figref>2</figref> transmitted - namely three times consecutively transmitted - received response information AWI in at least one time window ZF 1, ZF 2, ZF 3 or ZF 4 in each Series F several times successively generated series of K = 4 time windows ZF, a transponder <figref>2</figref> is selectable, whereupon will also be discussed in more detail. The evaluation<figref>22</figref> contain detecting <figref>23</figref>Which are formed on the one hand, the Time window ZF 1, ZF 2, ZF 3 and ZF 4 or this time window defining Signals or information from the output <figref>18</figref> time window generating means <figref>17</figref> and on the other hand of the demodulator <figref>15</figref> the receiving means <figref>13</figref> a second input <figref>24</figref> the microcomputer <figref>3</figref> supplied demodulated to receive response information AWI and with which - depending from at least one of at least one transponder occurrence transmitted received answer information AWI in at least one time slot ZF 1, ZF 2, ZF 3 or ZF 4 of a series of K = 4 time windows ZF - a detection information of K = 4 possible Detection information is generated. In the present case as Detection information a time window information ZFI1, ZFI 2, ZFI3 or ZFI 4 of K = 4 possible as detection information window information ZFI generated at an output <figref>25</figref> of detecting <figref>22</figref> dispensable is. Using each of K = 4 time windows information ZFI1, ZFI 2, ZFI3 and ZFI 4 is a particular Nth time window ZF 1, ZF 2, ZF 3 or ZF 4 selectable, whereupon more detail below is received. With the detecting means<figref>23</figref> are the prompt means <figref>5</figref> controlled and aktivbar whereupon also in more detail below is received. The evaluation<figref>22</figref> contain further logic means <figref>26</figref>, Which of the detection means <figref>23</figref> a Information about IAZF the number of time windows ZF of each of a series of K = 4 time windows IF, in which at least one answer information AWI has been received, fed is. By evaluating each in a series F of K = 4 time windows ZF with the detection means <figref>23</figref> identified information IAZF is connected to the logic means <figref>26</figref> for selecting a transponder <figref>2</figref> noticeable that successive in M ​​= 3 Series of K = 4 time windows ZF only each in a single time slot ZF 1, ZF 2, ZF 3 or ZF 4 answer information AWI has been received. If the logic means <figref>26</figref> it was found that in M ​​= 3 successive series of K = 4 time windows ZF only ever in a single time window ZF received an answer information AWI was, then is with great assumed certainty that the response information &lt;?page 9?&gt;AWI, each in a single time slot ZF - where it may each be another time window ZF - receive was, from always the same transponder <figref>2</figref> originates, ie that a transponder <figref>2</figref> from a plurality of transponders <figref>2</figref> individually selected has been. In this case, the logic means producing<figref>26</figref> a Information ITPs indicating that a transponder <figref>2</figref> selected has been. The logic means<figref>26</figref> give the information to ITPS an output <figref>27</figref> from. It should also be mentioned that M be chosen differently can. For example, M = 2. However, M = 4, 5, 6, 7, 8, 9 or 10 or even higher. The higher Select the value M is, the higher is the Selektiergenauigkeit.

the evaluation <figref>22</figref> are involved in the transponder communication device <figref>1</figref> With further together means that advantageously in the present case by data communication means <figref>28</figref> are formed, which dependent on from one of only a transponder occurrence <figref>2</figref> sent received Answer information AWI, so after a triage of a transponder <figref>2</figref>. with data communication means of the selected transponder <figref>2</figref> a Data communication feasible is. to carry such data communications is an output <figref>29</figref> the Data communication means <figref>28</figref> to the output <figref>6</figref> of microcomputer <figref>3</figref> connected via the data communication means <figref>28</figref> given Information data IDA the transmitting means <figref>7</figref> can be fed, to be sent. From a transponder<figref>2</figref> received Information data IDA of the receiving means <figref>13</figref> via the second entrance <figref>24</figref> the microcomputer <figref>3</figref> an input <figref>30</figref> the Data communication means <figref>28</figref> fed. The data communication means<figref>28</figref> act with an information data memory <figref>31</figref> together with the The aid of the data communication means <figref>28</figref> information data IDA writable or from the information data IDA using the Data communication means <figref>28</figref> can be read.

in the the present case, which are provided as additional means data communication means <figref>28</figref> in addition to Generating a first control information SI1 depending from one of only a transponder occurrence <figref>2</figref> transmitted received answer information AWI, so after a triage a transponder <figref>2</figref>, Formed, which is then generated, when the data communication means <figref>28</figref> performed data communications is completed, thus indicating that a data communication carried out is completed.

the provided as a further means data communication means <figref>28</figref> are further for generating a second control information SI2 depending from one of only a transponder occurrence <figref>2</figref> transmitted received answer information AWI, so after a triage a transponder <figref>2</figref>, Formed, which is then generated, when a previously selected transponder <figref>2</figref> already in its passive state was controlled.

Regarding the deactivating agent <figref>16</figref> it should be mentioned, that the disabling means <figref>16</figref> a deactivation stage <figref>32</figref> included, which with the data communication means <figref>28</figref> generated first control information SI1 fed and is with the deactivation information DAI can be generated, with a present in the lobby of selected transponder <figref>2</figref>. which in its active state in response to a call information AFI has already sent an answer information AWI, after his Triage controllable from its active state to its passive state is. The deactivation information, for example, by the its data word "1000" formed.

the deactivating agent <figref>16</figref> further contain another deactivation stage <figref>33</figref>Which to generate further deactivation information WDAI1, WDAI 2, is formed WDAI 3 and WDAI 4, with which further deactivation information WDAI1, WDAI 2, WDAI 3 and WDAI 4 all the transponders present in the reception area <figref>2</figref>. which in its active state during a series F of K = 4 time windows ZF outside of a using with the detecting means <figref>23</figref> generated time window information ZFI1, ZFI 2, ZFI3 or ZFI 4 selected given Nth time window in response to a call information AFI have already sent an answer information AWI, from their Active state can be controlled in a waiting state in which these transponders <figref>2</figref> no Answer information in response to time window interrogation information generate and send ZFAFI to which time window interrogation information ZFAFI discussed in more detail below is. The further deactivation information WDAI1, WDAI 2, WDAI 3 and WDAI 4 can for example be formed by the data words "1001", "1010", "1011" and "1100".

Regarding the prompt means <figref>5</figref> the transponder communication device <figref>1</figref> is also be mentioned that the prompt means <figref>5</figref> contain an interrogation stage, which subsequently always as initial interrogation stage <figref>34</figref> designated will and adapted to generate an interrogation information is that subsequently always as initial interrogation information IAFI is designated and with the all in the reception area of ​​the transponder communication device <figref>1</figref> present, optionally at least partially controlled in its sleep state transponder <figref>2</figref> controlled in its active state, and in addition each to possibly again generate and transmit answer information AWI during a series F of K time windows ZF are aufforderbar. The initial interrogation information IAFI example, by the data word "0000" ge&lt;?page 10?&gt;its forms. The request means<figref>5</figref> contain further stage another prompt that always follow as series interrogation stage <figref>35</figref> is referred to, the with the data communication means <figref>28</figref> generated second control information SI2 supplied is and for generating a further interrogation information is formed, which subsequently always as series interrogation information FAFI is referred and the - except by their triage controlled in its sleep state transponders <figref>2</figref> - all further Receptionist of the transponder communication device <figref>1</figref> present, each controlled in its wait state transponder <figref>2</figref> out their wait state again controlled in its active state, and in addition each to again generate and transmit answer information AWI while a further series F of K time windows ZF are aufforderbar. The series interrogation information can FAFI example by the data word "0010" be formed.

the prompt means <figref>5</figref> further comprise one more Interrogation stage, which subsequently always as time window interrogation stage <figref>36</figref> designated is used to generate yet another interrogation information is formed, namely the - above- shortly mentioned - time window interrogation information ZFAFI that when delivering a time window information ZFI1, ZFI 2, ZFI3 or ZFI 4 by detecting <figref>23</figref> is generated. With the time window interrogation information ZFAFI all Receptionist present in their active state located transponder <figref>2</figref>. which in its active state in which - by means of the time slot information ZFI1, ZFI 2, ZFI3 or ZFI 4 of a series F of K time windows ZF selected - specific Nth time window ZF 1, ZF 2, ZF 3 or ZF 4 in response to a call information already an answer information AWI have sent, without leaving the active state according to again generate and transmit Answer information AWI during a further series F of K time windows ZF aufforderbar. The time window interrogation information ZFAFI may be "0001" for example, formed by the data word.

Regarding the Transponderselektiermittel <figref>4</figref> the transponder communication device <figref>1</figref> is still to mention, that when this Selektiermitteln <figref>4</figref> between the detection means <figref>23</figref> and the interrogation means <figref>5</figref> selection means <figref>37</figref> recorded are. The time window selection means<figref>37</figref> is one of said detecting <figref>23</figref> at its output <figref>25</figref> as Detection information given time window information ZFI1, ZF 2, ZF 3 or ZFI 4 fed. According to the time window selection means <figref>37</figref> supplied time window information ZFI1, ZFI 2, ZFI3 or ZFI 4 is from the K time windows ZF a sequence F of K time windows ZF a given Nth time window selected. the Zeitfens ter selection means <figref>37</figref> are for generating time window identifications ZFK1, ZFK 2, ZFK 3 and ZFK4 dependent on from one supplied to them Time Window Information ZFI1, ZFI 2, ZFI3 or ZFI 4 formed. the Time window selection means <figref>37</figref> are in this case designed such that they when supplied Timeslot information ZFI1 time window identifications ZFK 2, ZFK 3 and ZFK4 and supplied time window information ZFI 2, the time window identifications ZFK1, ZFK 3 and ZFK4 and supplied time window information ZFI3 time window identifications ZFK1, ZFK 2 and ZFK4 and supplied time window information ZFI 4 generate the time window identifications ZFK1, ZFK 2 and ZFK 3. the generated time window identifications ZFK1, ZFK 2, ZFK 3 and ZFK4 stand at a first output <figref>38</figref> the time window selection means <figref>37</figref> to Available.

the Time window selection means <figref>37</figref> are continue to route to them by the detection means <figref>23</figref> supplied time window information ZFI1, ZFI 2, ZFI3 or ZFI 4 to the call agent <figref>5</figref>and Although the time window interrogation stage <figref>36</figref> This means, adapted to generating the time window interrogation information To activate ZFAFI after all the further deactivation information WDAI1, WDAI 2, WDAI 3 or WDAI 4 controllable in its wait state transponder <figref>2</figref> are offset in their waiting state. The Forward ever a time window information ZFI1, ZFI 2, ZFI3 or ZFI 4 by the time window selection <figref>37</figref> via a second output <figref>39</figref> the time window selection means <figref>37</figref>,

It Note that the Transponderselektiermittel <figref>4</figref> between the detection means <figref>23</figref> and the initial interrogation stage <figref>34</figref> recorded activating agent <figref>40</figref> contain. With the activation means <figref>40</figref> is a selection process activated, in which, starting from a number of the reception area of ​​the Transponder communication device <figref>1</figref> transponders present <figref>2</figref> in consecutive Selektierschritten the activated selection per Selection step, a transponder <figref>2</figref> individually selected is, after each triage of a transponder <figref>2</figref> the selected transponder - after with him, where appropriate, an identification procedure and data exchange took place - in a sleep state is added.

Around To enable such a selection process containing activating agent <figref>40</figref> a Start level <figref>41</figref>, With the regular and specified constant Intervals, for example, at intervals in a range between 100 ms and 1 s, a start information STI is generated. Such starting stage may also use even with a supplied externally be separate control information controlled to a witness he a start information to provide. A start information generated STI is the initial interrogation stage <figref>34</figref> fed, the as a result &lt;?page 11?&gt;a supplied thereto Start Information STI an initial interrogation information IAFI generated and the exit <figref>6</figref> to the transmitting means <figref>7</figref> write. The activating agent<figref>40</figref> contain still another logic stage <figref>42</figref>, With a further Start Information WSTI is generated which as the initial interrogation stage <figref>34</figref> the prompt means <figref>5</figref> is supplied to a generating the initial interrogation information IAFI trigger. The further logic stage <figref>42</figref> the activating agent <figref>40</figref> is one part of the series interrogation stage <figref>36</figref> a series interrogation information FAFI and the other part of the detection means <figref>23</figref> a at a further output <figref>43</figref> of detecting <figref>23</figref> given further detection information, namely another time slot information WZFI fed. The other time slots information WZFI is from the detection means <figref>23</figref> generated and sent to the further output <figref>43</figref> issued when the detection means <figref>23</figref> on Operating situation is detected in which, after dispensing a series interrogation information FAFI in no time windows ZF the basis of previously submitted Series interrogation information FAFI generated series F of K time windows a received answer information AWI, which means that at a conducted already selection process all transponder <figref>2</figref> were selected individually and thus the Selection process is finished. In this case, by the two further logic stage <figref>42</figref> the activating agent <figref>40</figref> supplied information - namely the Series interrogation information FAFI and the other time slots information WZFI - causes that the further logic stage <figref>42</figref> further start information WSTI to the initial interrogation stage <figref>34</figref> the interrogation means <figref>5</figref> write, whereby then a renewed selection process with this necessary Selektierschritten is started.

Based on the transponder communication device <figref>1</figref> according to <figref idrefs="S47">1</figref> is a development of such a transponder communication device according to a second embodiment schematically illustrated in which the initial interrogation stage <figref>34</figref> to the formed generating an initial interrogation information IAFI is, in addition to the the number K of time windows ZFI, ZFI 2, ZFI3 and ZFI 4 to ZFIK in to the time-window generating means <figref>17</figref> generated Follow F of K time windows ZF is fixable. This initial Auffoderungsinformation IAFI is - as this three dotted lines <figref>44</figref>. <figref>45</figref> and <figref>46</figref> in <figref idrefs="S47">1</figref> implied is of the initial interrogation stage <figref>34</figref> on the one hand via the exit <figref>6</figref> the microcomputer <figref>3</figref> the transmitting means <figref>7</figref> and on the other hand to a control input <figref>47</figref> time window means <figref>17</figref> and continue to the gate stage <figref>21</figref> supplied. The time-window generating means<figref>17</figref> are formed in this case, to generate a series F of K time windows, wherein the number K by the initial interrogation information IAFI defined what by supplying the initial interrogation information IAFI over the control input <figref>44</figref> to the time window interrogation means <figref>17</figref> reached is.

In <figref idrefs="S48">2</figref> is one for contactless communication with at least one in the form a variant in <figref idrefs="S47">1</figref> illustrated transponder communication device <figref>1</figref> provided, in an active state with a transponder communication device <figref>1</figref> selectable transponder <figref>2</figref> shown.

Of the transponder <figref>2</figref> contains receiving means <figref>50</figref>Configured to receive at least one of a transponder communication device <figref>1</figref> producible and transmittable interrogation information AFI are provided. the receiving means <figref>50</figref> contain a coil stage <figref>51</figref>. with a transmitting coil <figref>52</figref> is equipped. One with the transmitting coil <figref>52</figref> received Interrogation information AFI is a receiving amplifier <figref>53</figref> fed. With the receiver amplifier <figref>53</figref> enhanced information and data are power supply means <figref>54</figref> fed with won those from the received information or data signals energy is such that the power supply means <figref>54</figref> at an output <figref>55</figref> Write a supply voltage V, with of all Components of the transponder <figref>2</figref>, The supply voltage a need, be supplied. The output<figref>55</figref> the power supply means <figref>54</figref> is a reset level <figref>56</figref> connected, with a reset information RI is generated when the power supply means with the <figref>54</figref> voltage obtained V is high enough. With the reset information RI are components of the transponder <figref>2</figref>For which this is required, controllable in a defined operating state. It is known measures, so that in the present Related not elaborate is received.

With the receiving means <figref>50</figref> received request information AFI and other received data is still a clock recovery stage <figref>57</figref> fed with the one from the received request information or data Clock signal TS can be regenerated from the clock recovery stage <figref>57</figref> dispensable is and with the clock signal TS in the transponder communication device <figref>1</figref> synchronous is.

the receiving means <figref>50</figref> have a demodulator <figref>58</figref> on, which is constructed as pulse-width modulator. Optionally, as a demodulator, a phase demodulator or a frequency demodulator be provided. the demodulator<figref>58</figref> is the regenerated Clock signal TS fed. By demodulator <figref>58</figref> are demodulated Aufforde insurance information AFI and other demodulated data to a first input <figref>59</figref> one microcomputer <figref>60</figref> the transponder <figref>2</figref> fed. With the microcomputer <figref>60</figref> are a variety of means and functions rea&lt;?page 12?&gt;lisiert, discussed below only partially closer to the is.

With the microcomputer <figref>60</figref> are invitation-Detektiermitttel <figref>61</figref> of transponder <figref>2</figref> realized that for detecting at least a received interrogation information AFI are provided. Further, to the microcomputer <figref>60</figref> with the interrogation detection <figref>61</figref> controllable response means <figref>62</figref> realized, the generating answer information AWI, the answer to a received and the interrogation detection <figref>61</figref> detected forms of interrogation information AFI, adapted and configured is. One with the response means<figref>62</figref> Response information generated AWI is an output <figref>63</figref> the microcomputer <figref>60</figref> fed and of this output <figref>63</figref> transmission means <figref>64</figref> the transponder <figref>2</figref> fed.

the transmitting means <figref>64</figref> are to send a response with the means <figref>62</figref> e rzeugten provided answer information AWI and trained. The transmitter means<figref>64</figref> contain a modulator <figref>65</figref>, Which is also the regenerated clock signal TS fed and with which, depending from a supplied thereto Answer information AWI or depending on other him supplied Data about the transmitting coil <figref>52</figref> of transponder <figref>2</figref> and this inductively coupled transmission coil <figref>12</figref> one Transponder communication device <figref>1</figref> a so-called Load modulation of the transmitting coil <figref>12</figref> one Transponder communication device <figref>1</figref> unmodulated clock signal supplied TS feasible is such that by This load modulation data transmission from the transponder <figref>2</figref> to a transponder communication device <figref>1</figref> takes place.

at the transponder <figref>2</figref> contain the answer means <figref>62</figref> now advantageously time window generating means <figref>66</figref>, the to generate a series F of K successive time windows ZF are provided and designed. The time window generating means<figref>66</figref> is a second input <figref>67</figref> the microcomputer <figref>60</figref> the regenerated Clock signal TS fed. With the time-window generating means <figref>66</figref> is in the present Case, a series F of K = 4 successive time windows ZF 1, ZF 2, ZF 3 and ZF 4 producible and deliverable. Each time window ZF is defined here by a particular condition or waveform. For example, the beginning of a time window ZF by a positive edge of a rectangular signal and the end of a time window, ZF be determined by a negative edge of this rectangular signal. It is also possible, the start of a time window ZF by a positive edge of a Square signal set and the end of this time window ZF by the start of the next set time window ZF, so this by a next positive edge Square wave signal. This obviously also applies to the time-window generating means<figref>17</figref> the Transponder communication device <figref>1</figref> according to <figref idrefs="S47">1</figref>,

the Answer Medium <figref>62</figref> further comprise control means <figref>68</figref> for the time-window generating means <figref>66</figref>, With the control means <figref>68</figref> are the time-window generating means <figref>66</figref> controllable and activatable to several times in succession, the sequence of F K time windows ZF to produce. The control means<figref>68</figref> for the time-window generating means <figref>66</figref> contain advantageously the interrogation detection <figref>61</figref>, Furthermore, the control means are <figref>68</figref> so formed that the control means <figref>68</figref> at the Receive a prompt information AFI by the interrogation detection <figref>61</figref> the Time window generating means <figref>66</figref> for generating a sequence F Navigate of K time windows ZF and activate. included for this purpose the control means <figref>68</figref> a gate circuit <figref>69</figref>Who at their three inputs with the interrogation detection produced and delivered detection information DI1, DI2 and DI3 fed and with which upon receipt of one of these detection information DI1, DI2 or DI3 a Detektier identifier DK can be generated that the time window generating means <figref>66</figref> be supplied and the activation of the time-window generating means <figref>66</figref> to Entails.

the in the control means <figref>68</figref> for the time-window generating means <figref>66</figref> contained Interrogation detection <figref>61</figref> contain an interrogation detection, which subsequently always as initial interrogation detection <figref>70</figref> designated and is adapted to detect one of a transponder communication device <figref>1</figref> to the Controlling the transponder <figref>2</figref> sent in its active state initial interrogation information IAFI is formed and with which the transponder <figref>2</figref> out its active state controlled in its active state, and in addition to optionally again generate and transmit answer information AWI is aufforderbar, whereupon described in detail hereinafter. With the Initial interrogation detection <figref>70</figref> is the first detection information DI1 producible and deliverable.

the in the control means <figref>68</figref> for the time-window generating means <figref>66</figref> contained Interrogation detection <figref>61</figref> further include a further interrogation detection, which subsequently always as a result of interrogation detection <figref>71</figref> designated and is adapted to detect one of a transponder communication device <figref>1</figref> transmitted Series interrogation information FAFI is formed and with the the transponder is located in a wait state <figref>2</figref> out is its waiting state controlled in its active state, whereupon more detail below is received. With the series interrogation detection stage<figref>72</figref> is the third detection information DI3 producible and deliverable.

&lt;?page 13?&gt;

the in the control means <figref>68</figref> for the time-window generating means <figref>66</figref> contained Interrogation detection <figref>61</figref> contain further still further interrogation detection, which is always below as time window interrogation detection stage <figref>72</figref> designated and is adapted to detect one of a transponder communication device <figref>1</figref> transmitted Time window interrogation information ZFAFI is formed and with of the transponders located in its active state <figref>2</figref> without Leaving the active state for generating and transmitting a response information AWI during a series F of K time windows ZF, thus also to again generate and sending an answer information AWI during a further series F of K time windows ZF is aufforderbar whereupon subsequently still discussed in detail is. By the time window interrogation detection stage<figref>71</figref> is the second Detection information DI2 producible and deliverable.

With the microcomputer <figref>60</figref> the transponder <figref>2</figref> continue Deactivation detecting means <figref>73</figref> realized that for detecting at least one of a transponder communication device <figref>1</figref> transmitted Deactivation information DAI are provided. With the deactivation-detecting means<figref>73</figref> is at least one of state information generated with the aid of the transponder <figref>2</figref> can be brought from its active state and generating answer information AWI by the answer means <figref>62</figref> inhibited can be.

the Deactivation detecting means <figref>63</figref> include a deactivation detection <figref>74</figref>. the means for detecting one of a transponder communication device <figref>1</figref> to the Controlling the transponder <figref>2</figref> from its active state to its formed dormancy transmitted deactivation information DAI is and with the aid of which the transponder <figref>2</figref> from its active state can be brought into its passive state and a state information SZI can be generated. The state information SZI can here also directly by the detected deactivation information DAI be formed. The state information generated is SZI the response means <figref>62</figref> supplied, namely a passive state memory <figref>75</figref> the Answer Medium <figref>62</figref>In which the state information SZI is stored and with which the transponder <figref>2</figref> in his Sleep state can be maintained. As long as the state information SZI in the Schlafzu stood memory <figref>75</figref> is stored, is in the transponder <figref>2</figref> stored in that the transponder <figref>2</figref> in his sleep state. The state memory<figref>75</figref> is with the interrogation detection <figref>61</figref> after detecting a specific call information deleted, namely the state memory <figref>75</figref> With Help the initial interrogation detection <figref>70</figref> the Interrogation detection <figref>61</figref> after detecting an initial interrogation information IAFI erasable. For this purpose, the of the initial interrogation detection stage <figref>70</figref> generated and given first detection information DI1 a clear input <figref>76</figref> of Sleep state memory <figref>75</figref> supplied when the event occurs to the clear input <figref>76</figref> the sleep state memory <figref>75</figref> on Delete the memory contents of the sleep state memory <figref>75</figref> result Has.

the Deactivation detecting means <figref>73</figref> further include a further deactivation detection <figref>77</figref>, For detecting the one of a transponder communication device <figref>1</figref> to the Controlling the transponder <figref>2</figref> from its active state to its Wait state sent further deactivation information WDAI1, WDAI 2, WDAI 3 or WDAI 4 is formed and with the aid of transponder <figref>2</figref> from its active state to its standby state can be accommodated and with the generation of a wait state information WZI triggered is. In generating the standby state information is subsequently WZI more detail received. The generated standby state information WZI is a standby state memory<figref>78</figref> supplied in the standby state information WZI is stored and with the the transponder can be held in its standby state. Of the Standby state memory <figref>78</figref> about the interrogation detection <figref>61</figref> after a detecting a specific call information deleted. In the present case the standby state memory <figref>78</figref> both by means of the initial interrogation detection stage <figref>70</figref> the Interrogation detection <figref>61</figref> as well as with the aid of the Follow interrogation detection <figref>71</figref> the Interrogation detection <figref>61</figref> erasable. For this, the with the initial interrogation detection <figref>70</figref> producible and dispensable first detection information DI1 and with the subsequent interrogation detection <figref>71</figref> producible and deliverable third detection information DI3 a clear input <figref>79</figref> of Wait-state memory <figref>78</figref> fed. If the two detection information DI1 and DI3 on ​​clear input <figref>79</figref> of Wait-state memory <figref>78</figref> occur, they have a deletion of Memory contents of the wait state memory <figref>78</figref> result.

at the transponder <figref>2</figref> included with the microcomputer <figref>60</figref> unrealized Answer Medium <figref>62</figref> advantageously a random number generator <figref>80</figref>, Of the Random number generator Enge <figref>80</figref> is the same as the time-window generating means <figref>66</figref> With the control means <figref>68</figref> be activated, namely the fact that the with the gate circuit <figref>69</figref> each generated Detektier identifier DK also the Random number generator <figref>80</figref> is supplied. With the random number generator<figref>80</figref> is one in the range of 1 to K lying random number Z generated and at an output <figref>81</figref> the random number generator <figref>80</figref> dispensable. With each with the random number generator <figref>80</figref> randomly generated Random number Z is a time window ZF of a series F of K time windows &lt;?page 14?&gt;ZF selectable or can be determined. The respectively with the random number generator<figref>80</figref> generated Random number Z is a random number storage <figref>82</figref> fed and therein stored. Are listed in the random number storage<figref>82</figref> each stored random number Z has two detectors <figref>83</figref> and <figref>84</figref> fed. Of the first detector <figref>83</figref> is designed such that with it is detectable that the window number N of a time window ZF of a series F of K time windows ZF with the random number Z matches. In accordance the window number N of a time window ZF with the random number Z produced the first detector <figref>83</figref> activation information AKTI, which a reply stage <figref>85</figref> to an activation input <figref>86</figref> be fed.

With the response level <figref>85</figref> is an answer information AWI generated, which is formed for example by the data word "1111". One with the response level <figref>85</figref> generated Answer information AWI is the output <figref>63</figref> the microcomputer <figref>60</figref> and from this the transmitting means <figref>64</figref> the transponder <figref>2</figref> fed, so that the Answer information AWI by the already mentioned load modulation with the modulator <figref>65</figref> to a transponder communication device <figref>1</figref> transfer can be respectively sent. The response level<figref>85</figref> has continued to a blocking input <figref>87</figref> to which the in the state memory <figref>75</figref> saved State information SZI and in the standby state memory <figref>78</figref> saved Standby state information WZI or one of these two pieces of information SZI and WZI derived control information can be fed and when in the sleep state befindlichem or on standby transponder <figref>2</figref> the response level <figref>85</figref> to block and thus prevent a generating answer information AWI.

As already mentioned above, compares the first detector <figref>83</figref> the time window number N with the respective random number Z and are in a tie, the activation information AKTI to activate the response level <figref>85</figref> from. This means, that the response level <figref>85</figref> always only during the random number Z certain time window ZF is activated. Thus, the response means<figref>62</figref> to the Generating a response information AWI in each a time window ZF 1, ZF 2, ZF 3 or ZF 4 formed, in which the random number Z given time window ZF of a series F of K time windows ZF.

As mentioned, is in the random number storage <figref>82</figref> each stored Random number Z and the second detector <figref>84</figref> fed. the second detector <figref>84</figref> are further respectively connected to the further deactivation detection <figref>77</figref> detected further Deactivation information WDAI1, WDAI 2, WDAI 3 or WDAI 4 fed. Of the second detector <figref>84</figref> is designed such that with it is detectable in that the Number N of another deactivation information WDAI1, WDAI 2, WDAI 3 or WDAI 4 to the memory from the random number <figref>82</figref> accepted Random number Z matches. If the number N of another with the deactivation detection <figref>77</figref> detected further deactivation information WDAI1, WDAI 2, WDAI 3 or WDAI 4 coincides with the random number Z, Then, the second detector <figref>84</figref> the already above-mentioned standby state information WZI and returns the standby state information WZI to the standby state memory <figref>78</figref> from, where then the standby state information WZI is stored. In the transponder <figref>2</figref> is saved, that he in his waiting state is as long as the standby state information WZI to the standby state memory <figref>78</figref> saved is.

Regarding the transponder <figref>2</figref> still remains to mention that the transponder <figref>2</figref> With the microcomputer <figref>60</figref> realized data communication means <figref>88</figref> contains whose entrance <figref>89</figref> to the first input <figref>59</figref> the microcomputer <figref>60</figref> and by the first input <figref>59</figref> to the receiving means <figref>50</figref> is connected and whose output <figref>90</figref> to the output <figref>63</figref> the microcomputer <figref>60</figref> and by the exit <figref>63</figref> with the transmitting means <figref>64</figref> connected is. The data communication means <figref>88</figref> the transponder <figref>2</figref> Act with an information data memory <figref>91</figref> together in the with the data communication means <figref>88</figref> information data IDA can be written and from which the data communication means <figref>88</figref> information data IDA can be read.

Based on of in <figref idrefs="S48">2</figref> transponder shown <figref>2</figref> is a Training of a transponder according to a second embodiment shown schematically, in which the initial interrogation detection stage <figref>70</figref> to the Detecting an initial interrogation information IAFI is formed, with the addition, the number K of time windows ZF in the time-window generating means <figref>66</figref> generated Follow F of K time windows ZF is securable and in which the time-window generating means <figref>66</figref> to the Generating a series F of K time windows ZF is formed, wherein of the number of K depending on the detected initial interrogation information IAFI with the initial Auffor alteration detection stage <figref>70</figref> fixable is. Therefor is in such a transponder <figref>2</figref> provided that - as in <figref idrefs="S48">2</figref> schematically with a broken line <figref>92</figref> indicated - with the initial prompt detection stage <figref>70</figref> detected Initial interrogation information IAFI, the corresponding one of a Transponder communication device <figref>1</figref> was sent, a control input <figref>69</figref> time window generating means <figref>66</figref> is supplied and the number thus generated K of time windows ZF for each Series F of K time windows determined.

following a selection process is described in which a transponder communica&lt;?page 15?&gt;onseinrichtung <figref>1</figref> according to <figref idrefs="S47">1</figref> and adoption, five transponder <figref>2</figref> according to <figref idrefs="S48">2</figref> involved are transponders which <figref>2</figref> to distinguish them with TP1, TP2, TP3, TP4 and TP5 referred. In describing the Selektiervorganges will additionally <figref idrefs="S47">1</figref> and <figref idrefs="S48">2</figref> also on <figref idrefs="S49">3A</figref> to <figref idrefs="S49">3L</figref> reference taken.

The Starting the Selektiervorganges done automatically, for example characterized in that the Start level <figref>41</figref> the activating agent <figref>40</figref> the transponder communication device <figref>1</figref>. which starting stage <figref>41</figref> regularly at certain intervals start information STI emits a starting information STI to the initial interrogation stage <figref>34</figref> write. Then generates the initial interrogation stage <figref>34</figref> the initial interrogation information IAFI and outputs it at its output, as in <figref idrefs="S49">3A</figref> shown schematically is. The of the initial interrogation stage<figref>34</figref> given Initial interrogation information IAFI, with which a first selection step the activated selection is introduced, the gate circuit is <figref>21</figref> the control means <figref>20</figref> for the time-window generating means <figref>17</figref> supplied. This has the result that the gating stage <figref>21</figref> the Prompt identification AFK to the time-window generating means <figref>17</figref> write. Further, the generated initial interrogation information IAFI the transmitting means <figref>7</figref> supplied, and using this to all five in Lobby of the transponder communication device <figref>1</figref> present Transponders TP 1 to TP 5 sent. The all five transponders TP 1 to TP 5 with the transmitting means <figref>7</figref> Sent initial interrogation information IAFI is in all five transponders TP1 to TP5 with their reception means <figref>50</figref> received and depending on the first input <figref>59</figref> the microcomputer <figref>60</figref> and of this per the initial interrogation detection <figref>70</figref> supplied. Each Initial interrogation detection <figref>70</figref> then detected supplied to it Initial interrogation information IAFI and made the first detection information DI1. The first detection information DI1 is both the clear input <figref>76</figref> of Sleep state memory <figref>75</figref> as well as the clear input <figref>79</figref> of Wait-state memory <figref>78</figref> supplied, so that both an optionally in the state memory <figref>75</figref> stored state information SZI as well as optionally in the standby state memory <figref>78</figref> saved Standby state information WZI deleted will. This means that both an optionally stored sleep state as well as an optionally Stored waiting state of a transponder will be deleted and therefore all five transponders TP1 be added to TP 5 in their active state. The first detection information DI1 will continue to the gate stage <figref>69</figref> the control means <figref>68</figref> supplied to the then the Detektier identifier DK write that the time window generating means <figref>66</figref> and the Random number generator <figref>80</figref> is supplied.

the Formation of gate stage <figref>21</figref> the transponder communication device <figref>1</figref> and the formation of the gate stage <figref>69</figref> all transponders TP1 to TP5 is coordinated so that the with of the gate stage <figref>21</figref> generated Prompt identification AFK and the gate stage <figref>69</figref> generated Detektier identifier DK a synchronous start time window generating means <figref>17</figref> the Transponder communication device <figref>1</figref> and the time-window generating means <figref>66</figref> all Transponders TP1 to TP5 cause. For example, the synchronous Starting the time-window generating means <figref>17</figref> in the transponder communication device <figref>1</figref> and time window generating means <figref>66</figref> in all transponders TP1 to TP5 after a predetermined number of clocks of the clock signal TS after taking place at a time T1 Exit of generating the initial interrogation information IAFI accordance <figref idrefs="S49">3A</figref> to a time T2 done that in <figref idrefs="S49">3B</figref> stated is. After the synchronous start of the time window generating means<figref>17</figref> and <figref>66</figref> to the Time T2 is the time window started synchronously generating means <figref>17</figref> and <figref>66</figref> ever a first sequence F1 of K = 4 time windows ZF 1, ZF 2, ZF 3 and ZF 4 generated as in <figref idrefs="S49">3B</figref> is shown schematically.

As already mentioned, is in any within range of the transponder communication device <figref>1</figref> present Transponders TP 1 to TP 5 with the gate circuit therein <figref>69</figref> the Detektier identifier DK generated and provided to the random number generator <figref>80</figref> leave. Then generates each random number generator <figref>80</figref> of the Lobby present transponders TP 1 to TP 5 a random number Z, which according to the number K of time windows ZF in the range is 1 to 4 It is assumed that the two random number generators<figref>80</figref> the two transponders TP 1 and TP 5 randomly depending the number Z = 1 generate. It is further assumed that the Random number generator <figref>80</figref> the transponder TP3 the random number Z = 2 is generated. Furthermore, it should be assumed that the two random number generators<figref>80</figref> the two transponders TP2 and TP4 per the random number Z = 4 produce.

In each of the five Receptionist of the transponder communication device <figref>1</figref> present Transponders TP 1 to TP 5, the generated random number Z in the random number storage <figref>82</figref> stored. Furthermore, the stored random number Z in each of the five transponders TP1 to TP5 the first detector <figref>83</figref> supplied to the the random number supplied to it Z with the numbers N ( "1", "2", "3", "4") of the successively generated time window ZF 1, ZF 2, ZF 3 and ZF 4 of the first sequence F1 comparing of K = 4 time windows ZF. At equality a time window number N and the random number Z are each of the first detectors <figref>83</figref> the five transponders TP1, TP2, TP3, TP4 and TP5 activation information AKTI to the activation input <figref>86</figref> the response level <figref>85</figref> of respective transponder <figref>2</figref> from. After so&lt;?page 16?&gt;probably the state memory <figref>75</figref> as and the standby state memory <figref>78</figref> - Deleted, - as explained above is the response level <figref>85</figref> at its blocking input <figref>87</figref> neither the state information SZI nor the standby state information WZI supplied, So that the response level <figref>85</figref> for generating answer information AWI is released. Once the number N of a time window ZF with the Random number Z agrees, is the response level <figref>85</figref> answer information AWI from.

correspondingly the above-mentioned example, that in the two transponders TP1 and TP5 per the random number Z = 1 and in the transponder TP 3 the random number Z = 2 and the two transponders TP2 and TP4 per the random number Z = 4 were created, this has the Follow that with the response levels <figref>85</figref> the two transponders TP 1 and TP 5 while the first time window ZF 1 of the first series F 1 answer information depending on a AWI generated as in <figref idrefs="S49">3C</figref> schematically is shown, and that with the response level <figref>85</figref> of the transponder TP 3 during the second time window, ZF 2 of the first series F 1 answer information AWI generated, as in <figref idrefs="S49">3D</figref> is shown schematically, and that with the response levels <figref>85</figref> of the two transponders TP2 and TP4 while the fourth time window ZF 4 of the sequence F1 each response information AWI generated as in <figref idrefs="S49">3E</figref> schematically is shown.

the generated in a transponder TP answer information AWI is with the transmitting means <figref>64</figref> each transponder TP to the receiving means <figref>13</figref> the transponder communication device <figref>1</figref> Posted. Characterized in that in each random number storage <figref>82</figref> the five transponders TP 1 to TP 5 each generated random number Z is stored, is in each of these five transponders TP1 to TP5 information available that indicates in which Time window ZF of the first episode of the F1 concerned transponder TP answer information AWI generated and sent to the transponder communication device <figref>1</figref> Posted Has.

the of the five Transponders TP1 to TP5 accordingly <figref idrefs="S49">3C</figref>. <figref idrefs="S49">3D</figref> and <figref idrefs="S49">3E</figref> at the transponder communication device <figref>1</figref> transmitted Answer information AWI are after to the receiving means <figref>13</figref> receive and to the demodulator <figref>15</figref> have been demodulated, the second entrance <figref>24</figref> the microcomputer <figref>3</figref> and from this the detection means <figref>23</figref> the evaluation <figref>22</figref> supplied. The detection means <figref>23</figref> will continue with the time-window generating means <figref>17</figref> generated and at the output <figref>18</figref> time window generating means <figref>17</figref> votes Time window ZF 1, ZF 2, ZF 3 and ZF 4 of the first series F 1 of K = 4 Time windows ZF supplied.

With the detection means <figref>23</figref> will now be detected, in which the four time windows ZF 1, ZF 2, ZF 3 and ZF 4 of the first series F 1 a Answer information AWI has been received. In the assumed case, ask thus the detection means <figref>23</figref> found that in the first time window ZF 1 and in the second time window ZF 2 and the fourth time window ZF 4 the first series F 1 answer information AWI has been received. correspondingly this detection result to give the detection means <figref>23</figref> at its output <figref>25</figref> as detection information three time windows information, namely a first time window information ZFI1, a second time window information ZFI 2 and a fourth time window information ZFI 4 from as schematically in <figref idrefs="S49">3F</figref> is shown. These three time windows information ZFI1, ZFI 2 and ZF 4 are the time window selection means <figref>37</figref> supplied.

the Time window selection means <figref>37</figref> choose now according to the supplied to them Time slot information ZFI1, ZFI 2 and ZFI 4 a certain Nth Time window ZF of streams of the first F1. There, each of these selected three time windows ZF will. It is assumed that the Time window selection means <figref>37</figref> as given Nth time window ZF the first time window ZF 1 of the first Follow filter F1. According to this selection by the time window selection <figref>37</figref> produce the time window selection means <figref>37</figref> three Time window identifications, whose numbers from the number N = 1 the selected first Time window ZF 1 are different. This means that, in the assumed case that the time window selection means<figref>37</figref> the first time window ZF 1 of the first series have F1 selected, the time window selection <figref>37</figref> a second time window identification ZFK 2-, a third time window identification ZFK 3 and a fourth time slot identifier ZFK4 he testify and to their first output <figref>38</figref> proposed, as in <figref idrefs="S49">3G</figref> schematically is shown. The three time window identifications ZFK 2, ZFK 3 and ZFK4 be further deactivation stage <figref>33</figref> supplied to the then a second further deactivation information WDAI 2, a third further deactivation information WDAI 3 and a fourth further deactivation information WDAI 4 generated as in <figref idrefs="S49">3H</figref> schematically is shown. The three further deactivation information WDAI 2, WDAI 3 and WDAI 4 are connected to the output <figref>6</figref> the microcomputer <figref>3</figref> and by the exit <figref>6</figref> to the transmitting means <figref>7</figref> leave. hereby the three further deactivation information WDAI 2, WDAI 3 and WDAI 4 to five Receptionist of the transponder communication device <figref>1</figref> transponder present TP1, TP2, TP3, TP4 and TP5 sent.

In the five Transponders TP1 to TP5 are three further deactivation information WDAI 2, WDAI 3 and WDAI 4 to the further deactivation detection per <figref>77</figref> supplied. Each further deactivation detection <figref>77</figref> the five transponders TP1 to TP5 detects the three supplied to &lt;?page 17?&gt;further deactivation information WDAI 2, WDAI 3 and WDAI 4 under <figref idrefs="S49">3H</figref> and are the three detected further deactivation information WDAI 2, WDAI 3 and WDAI 4 to the second detector <figref>84</figref> from. In the second detectors <figref>84</figref> the five Transponders TP 1 to TP 5 are the numbers N of the three supplied to them further Deactivation information WDAI 2, WDAI 3 and WDAI 4 with in each random number storage <figref>82</figref> saved Random number Z compared. If a number of further deactivation information WDAI with the stored random number matches Z, this has the Result that the Standby state information WZI is discharged.

There In the assumed case in the random number storing <figref>82</figref> the two transponders TP 1 and TP5 the random number Z = 1 is stored and the second detectors <figref>84</figref> this two transponders TP 1 and TP 5, the second, third and fourth further deactivation information WDAI 2, WDAI 3 and WDAI 4 supplied are, therefore, the further deactivation information WDAI with the Numbers N = 2, 3, 4, these two second detectors <figref>84</figref> no agreement the numbers N of the three further deactivation information WDAI fixed with the stored random number Z, so that these two second detectors <figref>84</figref> no Write a standby state information WZI and accordingly no storage a standby state information WZI to the standby state memory <figref>78</figref> the two transponders TP 1 and TP 5 takes place, which means that the two transponders TP1 and TP5 remain in their active state. By contrast, yields the transponder TP 3 the comparison of the in its random number memory <figref>82</figref> saved Random number Z = 2 with the numbers N = 2, 3, 4 of the second detector <figref>84</figref> supplied second, third and fourth further deactivation information WDAI 2, WDAI 3 and WDAI 4 that the Random number Z = 2 with the number N = 2 the second further deactivation information WDAI 2 coincide, with the result that the second detector <figref>84</figref> the transponder TP3 a standby state information WZI to the standby state memory <figref>78</figref> write and accordingly the transponder TP 3 is placed in its wait state, in which over the blocking input <figref>87</figref> his response level <figref>85</figref> is blocked. In an analogous manner, in the two transponders TP 2 and TP 4 each with the aid of the second detector <figref>84</figref> detected, that the in the random number storing <figref>82</figref> these two transponders TP2 and TP4 per stored random number Z = 4 with the number N = 4 of each of the second detector <figref>84</figref> supplied fourth further deactivation information WDAI 4 matches, so that added these two transponders TP2 and TP4 in its wait state will.

It Note, that due the fact that with the detection means <figref>23</figref> it is determined that the third Time window ZF 3 of the first series F 1 answer information AWI was received, delivering the third time window information ZFI3 on ​​output <figref>24</figref> of detecting <figref>23</figref> also can be suppressed, which may then have the effect that the time window selection means <figref>37</figref> the third time window identification ZFK 3-not produce and accordingly generating the third further deactivation information WDAI 3 with the further deactivation stage <figref>33</figref> is omitted.

After this in the manner described above, the transponder TP2, TP3 and TP4 were placed in their waiting state, enter the time window selection <figref>37</figref> at its second output <figref>39</figref> the selected of them first Timeslot information ZFI1 the time window interrogation stage <figref>36</figref> from, with the result that the Time window interrogation stage <figref>36</figref> the time window interrogation information ZFAFI generates and outputs, as shown schematically in <figref idrefs="S49">3I</figref> illustrated is. The time window interrogation information is ZFAFI the gate stage<figref>21</figref> and according to their sending with the transponder communication device <figref>1</figref> and after her receiving the two left in their active state Transponders TP1 and TP5 of the gate stage <figref>69</figref> these two transponders TP1 and TP5 supplied, which, as already explained above in the same manner, to Results in that the Time window generating means <figref>17</figref> the transponder communication device <figref>1</figref> and the time-window generating means <figref>66</figref> both in their active state untreated transponders TP1 and TP5 activated. If it is assumed that the Time window interrogation information ZFAFI accordance <figref idrefs="S49">3I</figref> to a time T3 ends, which in turn has the synchronous activation time window generating means <figref>17</figref> and <figref>66</figref> and thus generating a second sequence F2 of K = 4 time windows ZF 1, ZF 2, ZF 3 and ZF 4 the result, wherein the second sequence F2 at a time T4 begins, as shown schematically in <figref idrefs="S49">3J</figref> illustrated is.

With the gate circuit <figref>69</figref> the two transponders TP 1 and TP 5 is continue again the random number generator <figref>80</figref> activated So that the two random number generators <figref>80</figref> ever again happen to have a generate random number Z. It is assumed that the random number generator<figref>80</figref> of Transponder TP1 the random number Z = 2 and the random number generator <figref>80</figref> of Transponder TP5 the random number Z = 4 generates. Accordingly, in an analogous manner as already described above with the response level <figref>85</figref> of Transponder during TP1 the second time window ZF 2 of the second sequence F2 response information AWI and the response level <figref>85</figref> the transponder during TP5 fourth time window ZF 4 of the second sequence F2 response information AWI generated as in <figref idrefs="S49">3K</figref> schematically is shown. Both answer information AWI are the Transponder communication device <figref>1</figref> ge&lt;?page 18?&gt;sends.

In the transponder communication device <figref>1</figref> is then with the detecting means <figref>23</figref> in an analogous manner as already determined described above that in the second time window ZF 2 and the fourth time window ZF 4 of the second series F of K = 4 time windows answer information AWI has been received. Then enter the detection means<figref>23</figref> correspondingly the detection result of the second and fourth time window information ZFI 2 and ZFI 4 to the time window selection <figref>37</figref> from. the Time window selection means <figref>37</figref> now choose again a time window ZF of. It is assumed that the time window selection means<figref>37</figref> the Select second time window ZF 2 of the second sequence F2. This has continued to Result that the time window selection means <figref>37</figref> first at its first output <figref>38</figref> the first, third and fourth Write a timeslot identifier ZFK1, ZFK 3 and ZFK4, whereby the more deactivation stage <figref>33</figref> the first, third and fourth additional Deactivation information WDAI1, WDAI 3 and WDAI 4 generates what to Results in that the Transponder TP5, the fourth time window ZF 3 of the second series F2 answer information AWI has submitted, placed in its wait state will, after which the time window selection means <figref>37</figref> at its second output <figref>39</figref> for forwarding the second time window information ZFI 2 worry, leading to a renewed driving the Zeitfens ter interrogation stage <figref>36</figref> leads, so that these the time window interrogation information ZFAFI emits what a renewed Generating a sequence of K time windows, so a third sequence F3 has of K time windows result.

After generating the third sequence F3 of K time windows is - because now only the transponders TP 1 is in its active state - only in a single time window ZF of the third episode F3 response information AWI received by the transponder TP1. It is assumed that the random number generator<figref>80</figref> of Transponder TP1 accident that Number Z = 3 has generated, so that in the third time window ZF 3 of the third episode F3 answer information AWI is transmitted and received, as shown schematically in <figref idrefs="S49">3L</figref> illustrated is. This is achieved by the detection means<figref>23</figref> detected whereupon said detecting <figref>23</figref> now the third Time window ZF 3, in which the answer information AWI from the Transponders TP 1 has been received, corresponding third time window information generate ZFI3 and the time window selection <figref>37</figref> submit. The time window selection means <figref>37</figref> produce Then, the first, the second and the fourth time window identification ZFK1, ZFK 2 and ZFK4 so that then Accordingly, the first, the second and the fourth further deactivation information WDAI1, WDAI 2 and WDAI 4 are generated and consequently the transponder TP1 is not placed in its wait state because it previously in the third Time window ZF 3 answer information AWI has sent.

following direct the time window selection <figref>37</figref> the third time window information ZFI3, so now only one Time window information ZFI, on their second output <figref>39</figref> the time window interrogation stage <figref>36</figref> continue, what F4 a renewed generating a sequence F, namely a fourth episode has of K = 4 time windows ZF result. Then, the are still still located in its active state transponders TP1 another Answer information AWI, so that the detection means <figref>23</figref> again notice that only in a single window, adoption, in the second time slot ZF 2 of the fourth sequence F4, a response information has been received.

After that as at already explained a Another consequence of F, namely a fifth Sequence generates F5 of K = 4 time windows ZF. This additional generating of further consequences F6, F7, F8, etc. of K time windows ZF may be at be continued, but sensibly stopped in time, as will hereinafter be discussed.

If with the detecting means <figref>23</figref> is repeatedly found, that only received in a single time window ZF answer information AWI was, this is a sure sign that only a single in an active state be sitive transponder TP Receptionist the transponder communication device <figref>1</figref> is, So a transponder TP has been selected.

As explained above, , at each sequence F1, F2, F3, F4, etc. of K time windows ZF with the detection means <figref>23</figref> detected, in which time windows ZF each have at least one answer information AWI has been received. It is therefore in the detection means <figref>23</figref> always an information IAZF present, which indicates in how many time windows ZF a series received F of K time windows each have at least one answer information AWI has been. This information about IAZF the number of time windows ZF in which answer information AWI has been received, will respectively the logic means <figref>26</figref> supplied. As soon as the logic means <figref>26</figref> notice that successive in M ​​= 3 Follow F of K time windows ZF only in respective time windows ZF a Answer information AWI has been received, then enter the logic means <figref>26</figref> at its output <figref>27</figref> ITPS the information that specifies that a transponder TP was selected. In the assumed case, it indicates that the transponder was selected TP1.

After triage of the transponder TP 1 are using the information ITPS the data communication means <figref>28</figref> activated with which then a data communication with the data communication means <figref>88</figref> of Transponder TP1 feasible &lt;?page 19?&gt;is. In this data communication, for example, first an identity code Transponder checked TP1 and Thereafter data communication for replacement or transfer of information data IDA are made.

After Termination of this data communication enter the data communication means <figref>28</figref> first the first control information SI1 from which the deactivation stage <figref>32</figref> is supplied. Then generates the deactivation stage <figref>32</figref> disabling information DAI, which is transmitted to the transponder TP 1 and in the transponder TP1 with the deactivation detection <figref>74</figref> detected is. This has the result that the Deactivation detection <figref>74</figref> the state information SZI generated and sent to the state memory <figref>75</figref> emits, so that the transponder TP1 set to its passive state and using the sleep state memory <figref>75</figref> in this state is kept. Thus, a first selection step the activated selection completed.

then place the data communication means <figref>28</figref> the second control information SI2 from which the series interrogation stage <figref>36</figref> is supplied. Then produced the series interrogation stage <figref>36</figref> the series interrogation information FAFI, with which a second selection step of the activated selection is initiated. The subsequent interrogation information FAFI is the gate stage <figref>21</figref> the transponder communication device <figref>1</figref> and the transmitting means <figref>7</figref> the transponder communication device <figref>1</figref> supplied. the transmitting means <figref>7</figref> Send the series interrogation information FAFI to all within range of the transponder communication device <figref>1</figref> present transponder <figref>2</figref>, But since by the conducted during the first selection step Disabling the transponders TP 1 is in its sleep state, the transponder can TP1 not respond to the series interrogation information FAFI and therefore remains in its sleep state. The other Receptionist the transponder communication device <figref>1</figref> given the assumed Case present transponder TP2, TP3, TP4 and TP5, the previous in the first selection step of the activated selection in their Wait state were controlled, can on the other hand by means of the transponder communication device <figref>1</figref> transmitted Series interrogation information FAFI from its wait state in their Active state are brought. This is possible in that the transmitted series interrogation information FAFI the series interrogation detection stage <figref>71</figref> each the four transponders TP2 is detected to TP5 what result has that Follow interrogation detection <figref>71</figref> the third detection information DI3 to the clear input <figref>79</figref> of Wait-state memory <figref>78</figref> emits, whereby the standby state memory <figref>78</figref> is cleared and accordingly, each of the four transponders TP 2 to TP 5 from his Wait state is controlled in its active state. Furthermore, the third detection information DI3 the gate stage <figref>69</figref> the four transponders to TP2 TP5 supplied.

In dependence of the gating stage <figref>21</figref> the transponder communication device <figref>1</figref> supplied, the second selection step introductory series interrogation information FAFI and depending of the gating stage <figref>69</figref> the four transponders to TP2 TP5 supplied third detection information DI3 then the time window generating means <figref>17</figref> and the time-window generating means <figref>66</figref> in an analogous manner, as already described restarted synchronously, so that again a first sequence F1 of K = 4 time windows ZF at the beginning of the second Selection step of the activated selection is generated. Now, with reference to the transponder TP2, TP3, TP4 and TP5 in an analogous manner as already described above, a further transponder TP individually selected. After a data communication between the second Selection step the selected transponder and the transponder communication device <figref>1</figref> completed was also the transponder is set to its passive state. It is assumed that this is the transponder TP 5, the second at the Selection step has been selected.

Subsequently with the newly produced series interrogation information FAFI a third selection step is activated, at the basis of the remaining selects three transponders TP2, TP3 and TP4 a next transponder and finally is set to its passive state. It is assumed that it is this is the transponder TP 3, which in the third selection step was selected.

In a subsequent fourth selection step is then based on the nor for selecting remaining transponder TP2 and TP4 a these two transponders selected and finally in its passive state added. It is assumed that this is the transponder TP 4, the fourth in the Selection step has been selected.

at a subsequently activated fifth selection step finally selects the still remaining for selecting transponders TP2 and finally set to its passive state.

After implementation the five above Selektierschritte described all five transponders TP1, TP2, TP3, TP4 and TP5 placed in its sleep condition, so that when subsequently again with the series interrogation information FAFI acti&lt;?page 20?&gt;fourth sixth selection step by any of the five transponders TP 1 to TP 5 an answer information to the transponder communication device <figref>1</figref> Posted is. This is achieved by the detection means<figref>23</figref> detected after which the detection means <figref>23</figref> then at its output <figref>43</figref> the Add additional time window information WZFI, indicating that no Response information has been received, and the further logic stage <figref>42</figref> the activating agent <figref>40</figref> is supplied. The further logic stage<figref>42</figref> becomes also - as already mentioned above - with the Series interrogation stage <figref>35</figref> produced series interrogation information FAFI supplied, with the sixth selection step was triggered. Upon receipt of each aforementioned Information WZFI and FAFI generates additional logic stage <figref>42</figref> the further start information WSTI, with the result that the initial interrogation stage <figref>34</figref> again is activated, the activation of a new Selektiervorganges leads to.

As from the foregoing description, is provided with a according to the invention the transponder communication device <figref>1</figref> and transponders invention <figref>2</figref> on very quick and safe individual selecting each one transponder <figref>2</figref> guaranteed. This is because for selecting only the rich in a Empfangsbe Transponder communication device <figref>1</figref> transponder present <figref>2</figref> at to consider a selection process are and by dividing the transponder present in the reception area <figref>2</figref> several Time window ZF rapid and numerous elimination of transponders <figref>2</figref> reached is such that with few Selektierschritten and therefore very time-saving per a transponder <figref>2</figref> is selectable. As advantageous continues yet herauszustreichen that during each Selection step of the Selektiervorganges at a selection step provisional retired but not yet selected transponder <figref>2</figref> for safety's sake be placed in a wait state, so that it during the other sequence the selection step no interfering influences exercise can, and after a successful selection of a transponder for subsequent Triage another transponder in a very simple way be brought back from its standby state to their active state can. Finally, nor to lead to be advantageous that everybody selected in a selection step of Selektiervorganges added transponder after his triage in a sleep state is such that it at subsequent Selektierschritten not a Selektiervorganges to consider more is and also no interfering can exert influence.

at a modification of the Tansponder communication device <figref>1</figref> according to <figref idrefs="S47">1</figref> can the further deactivation stage may not be provided, in which case with the time window selection means can be produced from all of the detection means as detection information and deliverable time frame information ZFI1, ZFI 2, ZFI3 and ZFI 4 a time window information ZFI is currently selected and the time window interrogation stage <figref>36</figref> is supplied, then to generate and supply four of time window interrogation information is ZFAFI1, ZFAFI2, ZFAFI3 and ZFAFI4 formed which on transponder can be sent, a modification of the transponder <figref>2</figref> according to <figref idrefs="S48">2</figref> represent and the processing of these four time window interrogation information ZFAFI are suitable. Each transponder has then compared to the in <figref idrefs="S48">2</figref> displayed transponders <figref>2</figref> no further deactivation detection on, however, a time window interrogation detection stage <figref>72</figref>. the means for detecting and outputting the four time window interrogation information ZFAFI is formed, and then the respective detected and discharged Time window interrogation information ZFAFI a second detector <figref>84</figref> instead of the further deactivation information WDAI be supplied, as in <figref idrefs="S48">2</figref> schematically with dashed lines <figref>93</figref> and <figref>94</figref> is indicated. The second detector<figref>84</figref> is formed in this case such that it specifies the number N of it in each case supplied time window interrogation information ZFAFI N with the from the random number storage <figref>82</figref> accepted Random number Z compares and inequality a standby state information WZI generated and sent to the standby state memory <figref>78</figref> write, so that all transponder <figref>2</figref>That previously in the time window interrogation information ZFAFI N corresponding Nth time window ZF N response information AWI have sent are placed in its wait state.

at the in the previous paragraph briefly described modified transponder communication device is the further deactivation stage by the time window interrogation stage educated. In the in the previous paragraph briefly explained modified transponder is further deactivation detection formed by the time window interrogation detection.

the Invention is not limited to the above-described embodiments limited. In the above- variants of transponders is called passive transponder, in where needed Energy is recovered with the help of the received data signals. the Invention is of course even with so-called active transponders with their own power supply, as a battery or solar cells, advantageously used. As in the above- variants the case, the communication between the transponder communication device and each transponder in both communication directions on inductive Forms and means, wherein the communication frequency, which in the is substantially determined by the frequency of the clock signal, in &lt;?page 21?&gt;both Communication directions about 125 kHz. It is within the scope of Invention, however, also possible for the Communication in one communication direction of a transponder communication device to each transponder inductively with a communication frequency conduct of about 125 kHz, However, in the other communication direction, the communication with a UHF radio-based system with a communication frequency carried out in the range of 433 MHz.