EP1006248A1 - Remote-controlled access control device, in particular for a motor vehicle and portable transponder therefor - Google Patents

Remote-controlled access control device, in particular for a motor vehicle and portable transponder therefor Download PDF

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Publication number
EP1006248A1
EP1006248A1 EP98123009A EP98123009A EP1006248A1 EP 1006248 A1 EP1006248 A1 EP 1006248A1 EP 98123009 A EP98123009 A EP 98123009A EP 98123009 A EP98123009 A EP 98123009A EP 1006248 A1 EP1006248 A1 EP 1006248A1
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EP
European Patent Office
Prior art keywords
code signal
transponder
question
control device
access control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98123009A
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German (de)
French (fr)
Other versions
EP1006248B1 (en
Inventor
Thomas Kirchlinde
Thomas Röhrl
Wolfgang Piesch
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Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP98123009A priority Critical patent/EP1006248B1/en
Priority to DE59809979T priority patent/DE59809979D1/en
Priority to US09/455,600 priority patent/US6577227B1/en
Publication of EP1006248A1 publication Critical patent/EP1006248A1/en
Application granted granted Critical
Publication of EP1006248B1 publication Critical patent/EP1006248B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G07C2009/00365—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks

Definitions

  • the invention relates to a remotely controllable access control device, especially for a motor vehicle, and a designed transponder.
  • a stationary one for example in a motor vehicle arranged transmitter and receiver unit sends when pressed a triggering device (e.g. door handle) a question code signal, that of a transponder carried by the user received and answered by a response code signal.
  • the sending and receiving unit compares the received response code signal with a stored target code signal and Approves access if they match, i.e. unlocks the Motor vehicle door.
  • the transponder can be in the form of a conventional one Key or be designed as a chip card.
  • the invention has for its object a remotely controllable To create access control facility at which the danger of an unauthorized unlocking process is reduced.
  • the invention becomes one for such an access control device designed portable transponder created according to claim 7.
  • the transponder sends depending on whether it has a question code signal has received or by manual operation of his Actuator for signal transmission is caused different Send signals to the stationary transmitter and receiver unit.
  • These different transmission signals can consist in that when a question code signal and always the same when actuating the actuating element Emits base code signal, but with an additional, added Information, for example an identifier, which indicates whether the transponder by receiving a question code signal or by actuating the actuator for Sending the code signal has been caused.
  • This additional information cannot be added only in one Identifier exist, but also communicated in another way by different numbers, for example sending the same code signal depending on whether previously a question code signal was received or the actuator had been pressed. Avoids such a design the need to extend the code signal as such need (by adding the identifier) and this information currently have to generate with every transmission. Instead, the same code signal can always be used come through, the cause of the code signal transmission the number of retransmissions is communicated. For example the configuration can be made such that upon receipt of the question code signal the code signal twice in succession is sent while operating the actuator the code signal is only sent once or three times.
  • an opening process only after repeated, e.g. triple repetition of the question and answer code cycle.
  • the response code signal In this case, it must be provided several times on time be what security against an unjustified Opening process increased.
  • that can Question and / or answer code signal during repetition the question and answer code cycles are changed, for example by respective recalculation of the new question and / or answer code signal to be transmitted on the basis of the previous sent question and / or answer code signal and one internal, the transponder and the stationary transmit and Known key receiving unit.
  • the transponder actuating element when the transponder actuating element is actively actuated several code signals from the transponder, preferably with alternating coding. This also increases security against unauthorized persons Obtaining access by copying the transponder code signals, because these are then in the correct time Sequence and sent at the correct time interval Need to become.
  • the stationary transmitter and receiver unit checked in this and that explained in the previous paragraph Case also the temporal position and chronological order the code signals sent by the transponder, ie checked additionally a time criterion.
  • the transponder in such a way that that he can store two different code signals (or generate), one of which is in response to receiving a question code signal and the other in response sent out on the actuation of the actuating element becomes.
  • the stationary transmitter and receiver unit checks this received code signal, and if necessary the additionally determined Information, being provided if it previously received a question code signal sent out another information and / or another target code signal is expected and provided than if there was no previous transmission of a question code signal. Only if the received code signal, and if necessary the additional information with the currently provided Target code signal and / or the currently expected information matches, controls the transmitting and receiving device unlocking the access, but otherwise leaves blocked access.
  • the transponder If in the case described at the beginning the transponder through an unauthorized transmitter with the Question code signal is applied, it therefore sends Code signal and / or information that the stationary Sending and receiving unit the previous reception of a Question code signal signals. Since the sending and receiving unit but did not send out such a question code signal and thus only that of the transponder actuation element assigned code signal (or the associated additional information) accepted, access remains blocked.
  • the transmitting and receiving device is designed so that it after sending out a question code signal, a time window for a opens for a short time, for example one second and only one received within this time window Answer code signal accepted.
  • the time window can go through Start an internal, at the appropriate time interval set timer when sending the question code signal be implemented, the time window when the Timer is closed again.
  • the invention is not only in motor vehicles, but also generally for door locking systems, for example house and / or Apartment or room doors can be used.
  • a method for remotely controllable is also within the scope of the invention Access control, where signal generation, - Transmission and evaluation in the above Way.
  • the Transponder 1 shows a key in the form of a portable transponder, the one control device (for example microchip) 2, an actuating element which can be operated manually by the transponder owner 3 and a transmitter / receiver 4 contains.
  • the Transponder 1 can have the usual key form, as a chip card trained or constructed in any other appropriate manner his.
  • the actuator 3 is with the control device 2 connected, so that the operating state at all times of the actuator 3 monitor and query can. Furthermore, the control device 2 with the transmitter / receiver 4 connected and recognizes not only from this received signals, but also controls this for transmission of code signals.
  • FIG. 1 further schematically shows some components of a Motor vehicle 5 shown, in which the invention Access control device is used.
  • the car 5 contains a transmitting and receiving device 6, which has a for example antenna 7 code signals attached to the outside mirror can send and receive.
  • the motor vehicle points an externally accessible actuating means operable by a user for example in the form of a door handle 8 or corresponding, on a door or other vehicle component arranged control buttons when pressed the transmitting and receiving device for sending a Question code signal to transponder 1 is caused.
  • a control device e.g. a door control unit 9 is present, which Unlocking and locking the vehicle doors controls and via a data communication line, e.g. a bus 10 with the transmitting and receiving device 6 is connected.
  • the transmitting and receiving device 6 and the door control device 9 can possibly also functionally combined as one unit his.
  • the transponder 1 continuously checks in a step S1 or at regular or irregular intervals, whether via the transmitter / receiver 4 a question code signal the transmitting and receiving device 6 is received. If that the case is, this is detected by the control device 2, which then the transmitter / receiver 4 to send out a in stored or generated by it, defined Code signal controls (step S2). In addition, a certain Information, for example the identifier "0" is sent. Alternatively, the control device 2 can in step S2 Transmitter / receiver 4 for sending a special, for the In the event of a previous question code signal reception Control code signal, such as code signal a.
  • step S3 is checked whether the actuating element 3 is actuated becomes what is detected by the control device 2. If if this is the case, the control device 2 controls the transmitter / receiver 4 to send the code signal, but now with other information, for example the identifier "1" (Step S4). Alternatively, the control device 2 can Transmitter / receiver 4 also for sending another, yourself Control code signal b different from code signal a. If it is determined in step S3 that the actuating element 3 is not activated, the sequence returns to the beginning of the Fig. 2 shown sequence of steps back. This is also in the connection the steps S2 and S4 the case. The steps S1 and S3 are run through cyclically.
  • Fig. 3 shows the operational flow in the stationary transmission and Receiving device 6.
  • step S5 it is checked whether whether the existing on the motor vehicle, by the motor vehicle user actuable actuating means, for example the door handle 8, is operated. If this is the case, the send and Receiving device 6 the transmission in step S6 a defined question code signal to transponder 1, and then waits for a certain time interval Step S7 to receive a response from transponder 1 returned code signal. If during the given Period no response signal is received, the returns Operating sequence again at the beginning of that shown in Fig. 3 Step back. If, however, a code signal in step S7 is determined, this is done with a step S8 stored in the transmitting and receiving device 6 or generated target code signal compared.
  • step S8 it checks whether the received code signal with an additional piece of information, namely the identifier "0" is. If both verification results are positive, unlocking the door control device 9 in a step S9 commanded the motor vehicle door or doors. Otherwise the operation returns without unlocking the vehicle again at the beginning of the sequence of steps shown in FIG. 3 back.
  • the transmitting and receiving device can also be programmed in this way be that if they have one or more wrong answer code signals has received communication for a particular Time period of, for example, 3 to 10 minutes, during this time that means no longer on response code signals responds and no question code signals are generated.
  • the transmitting and receiving device can also be designed so that an opening process after one or more reception of wrong answer code signals only with a special key (or code) from an authorized Body can be carried out.
  • Step S8 provides the code signal a as the target code signal, and in accordance with the received code signal proceeded to step S9 (unlocking). In this Case, no identification check is to be carried out in step S8.
  • step S10 in which it is checked whether a code signal via the Antenna 7 is received. If not, return the sequence at the beginning of the sequence of steps shown in FIG. 3 back so that the queries according to steps S5 and S10 be repeated until one of these queries for Result "yes" leads. If so at step S10, in step S11, the received code signal with the target code signal compared and further checked whether the with the received code signal transmitted information of the identifier "1" corresponds. If this is the case, the process moves to step S9 and unlocks the motor vehicle door or doors.
  • the code signal can be used as the target code signal in step S11 b are formed and checked whether the received Code signal matches this target code signal. In in this case no ID verification is required.
  • the code signal Number of items of information transmitted by the transponder the repetition of the code signals, their frequency, amplitude course or consist of another parameter, where then this parameter is checked in steps S8 and S11.

Abstract

The arrangement has a stationary transmitter and receiver device which transmits a polling code signal, receives a code signal from a portable transponder and delivers an unlocking signal to an unlocking unit if the code signal coincides with an internal code signal. The transponder has a manually operated actuation element which causes the transponder to transmit a code signal with information indicating whether the code signal is a response to a received polling signal or to operation of the manual control element. The transmitter/receiver device takes this information into account when deciding to generate an unlocking signal.

Description

Die Erfindung betrifft eine fernsteuerbare Zugangskontrolleinrichtung, insbesondere für ein Kraftfahrzeug, und einen hierfür ausgelegten Transponder.The invention relates to a remotely controllable access control device, especially for a motor vehicle, and a designed transponder.

Aus der DE 43 29 697 C2 ist eine fernsteuerbare Zugangskontrolleinrichtung gemäß dem Oberbegriff des Patentanspruchs 1 bekannt. Eine stationäre, beispielsweise in einem Kraftfahrzeug angeordnete Sende- und Empfangseinheit sendet bei Betätigen eines Auslösemittels (zum Beispiel Türgriff) ein Fragecodesignal, das von einem vom Benutzer getragenen Transponder empfangen und durch ein Antwortcodesignal beantwortet wird. Die Sende- und Empfangseinheit vergleicht das empfangene Antwortcodesignal mit einem gespeicherten Sollcodesignal und gibt bei Übereinstimmung den Zugang frei, d.h. entriegelt die Kraftfahrzeugtüre. Der Transponder kann in Form eines herkömmlichen Schlüssels oder als Chipkarte ausgebildet sein.DE 43 29 697 C2 describes a remote-controlled access control device according to the preamble of claim 1 known. A stationary one, for example in a motor vehicle arranged transmitter and receiver unit sends when pressed a triggering device (e.g. door handle) a question code signal, that of a transponder carried by the user received and answered by a response code signal. The sending and receiving unit compares the received response code signal with a stored target code signal and Approves access if they match, i.e. unlocks the Motor vehicle door. The transponder can be in the form of a conventional one Key or be designed as a chip card.

Bei einem solchen System kann sich allerdings möglicherweise ein Problem dahingehend ergeben, daß der Transponder durch einen nicht autorisierten, das Fragecodesignal nachbildenden Sender unberechtigt angesprochen wird und daraufhin das Antwortcodesignal sendet. Aufgrund der relativ großen Reichweite solcher Funksignale kann dieses Antwortcodesignal von der stationären Sende- und Empfangseinrichtung gegebenenfalls auch dann noch empfangen werden, wenn sich der rechtmäßige Träger des Transponders schon weiter entfernt von dem zu steuernden Objekt, beispielsweise dem Kraftfahrzeug, befinden sollte. In diesem Fall wird der Zugang zum Objekt freigegeben, ohne daß der rechtmäßige Benutzer dies veranlaßt hat oder Informationen über diesen unberechtigten Öffnungsvorgang erhält. Das Gefahr eines unberechtigten Objektzugangs besteht auch dann, wenn das Antwortcodesignal des Transponders unberechtigt aufgezeichnet und kopiert worden sein sollte und dieses kopierte Antwortcodesignal dann zur Zugangsverschaffung eingesetzt wird.With such a system, however, can possibly a problem in that the transponder through an unauthorized person who emulates the question code signal Sender is addressed without authorization and then the response code signal sends. Because of the relatively large range such radio signals can this response code signal from the stationary transmitting and receiving device if necessary be received even if the legitimate Carrier of the transponder is further away from that too controlling object, for example the motor vehicle should. In this case, access to the object is released, without the legitimate user causing this or information about this unauthorized opening process receives. There is a risk of unauthorized access to the property even if the transponder's response code signal is unauthorized should have been recorded and copied and this copied response code signal then for access is used.

Der Erfindung liegt die Aufgabe zugrunde, eine fernsteuerbare Zugangskontrolleinrichtung zu schaffen, bei der die Gefahr eines unberechtigten Entriegelungsvorgangs verringert ist.The invention has for its object a remotely controllable To create access control facility at which the danger of an unauthorized unlocking process is reduced.

Diese Aufgabe wird mit den im Patentanspruch 1 oder 5 genannten Merkmalen gelöst.This object is achieved with those mentioned in claim 1 or 5 Features resolved.

Weiterhin wird mit der Erfindung ein für eine derartige Zugangskontrolleinrichtung ausgelegter tragbarer Transponder gemäß dem Patentanspruch 7 geschaffen.Furthermore, the invention becomes one for such an access control device designed portable transponder created according to claim 7.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are in the subclaims specified.

Der Transponder sendet abhängig davon, ob er ein Fragecodesignal empfangen hat oder aber durch manuelle Betätigung seines Betätigungselements zur Signalaussendung veranlaßt wird, unterschiedliche Sendesignale zur stationären Sende- und Empfangseinheit. Diese unterschiedlichen Sendesignale können darin bestehen, daß er bei Empfang eines Fragecodesignals und bei Betätigung des Betätigungselements zwar stets dasselbe Basiscodesignal abgibt, jedoch mit einer zusätzlichen, hinzugefügten Information, beispielsweise einer Kennung, die angibt, ob der Transponder durch den Empfang eines Fragecodesignals oder durch die Betätigung des Betätigungselements zum Aussenden des Codesignals veranlaßt worden ist. The transponder sends depending on whether it has a question code signal has received or by manual operation of his Actuator for signal transmission is caused different Send signals to the stationary transmitter and receiver unit. These different transmission signals can consist in that when a question code signal and always the same when actuating the actuating element Emits base code signal, but with an additional, added Information, for example an identifier, which indicates whether the transponder by receiving a question code signal or by actuating the actuator for Sending the code signal has been caused.

Diese zusätzliche Information kann nicht nur in einer hinzugefügten Kennung bestehen, sondern auch in anderer Weise mitgeteilt werden, beispielsweise durch unterschiedliche Anzahl des Sendens desselben Codesignals abhängig davon, ob zuvor ein Fragecodesignal erhalten worden war oder aber das Betätigungselement gedrückt worden war. Eine solche Gestaltung vermeidet die Notwendigkeit, das Codesignal als solches verlängern zu müssen (durch Zufügung der Kennung) und diese Information aktuell bei jedem Sendevorgang generieren zu müssen. Statt dessen kann stets ein- und dasselbe Codesignal zum Einsatz kommen, wobei die Ursache des Codesignalsendens durch die Sendewiederholungsanzahl mitgeteilt wird. Beispielsweise kann die Ausgestaltung derart getroffen sein, daß bei Empfang des Fragecodesignals das Codesignal zweimal hintereinander gesendet wird, während bei Betätigung des Betätigungselements das Codesignal nur einmal, oder auch dreimal, gesendet wird.This additional information cannot be added only in one Identifier exist, but also communicated in another way by different numbers, for example sending the same code signal depending on whether previously a question code signal was received or the actuator had been pressed. Avoids such a design the need to extend the code signal as such need (by adding the identifier) and this information currently have to generate with every transmission. Instead, the same code signal can always be used come through, the cause of the code signal transmission the number of retransmissions is communicated. For example the configuration can be made such that upon receipt of the question code signal the code signal twice in succession is sent while operating the actuator the code signal is only sent once or three times.

Als Alternative kann vorgesehen sein, daß ein Öffnungsvorgang erst nach mehrfacher, beispielsweise dreifacher Wiederholung des Frage- und Antwortcodezyklus durchgeführt wird. Das Antwortcodesignal muß in diesem Fall mehrfach zeitrichtig bereitgestellt werden, was die Sicherheit gegenüber einem unberechtigten Öffnungsvorgang erhöht. Gegebenenfalls kann das Frage- und/oder Antwortcodesignal während der Wiederholung der Frage- und Antwortcodezyklen geändert werden, beispielweise durch jeweilige Neuberechnung des neu zu sendenden Frage- und/oder Antwortcodesignals auf der Grundlage des vorhergehend gesendeten Frage- und/oder Antwortcodesignals und eines internen, dem Transponder und der stationären Sende- und Empfangseinheit bekannten Schlüssels.As an alternative, it can be provided that an opening process only after repeated, e.g. triple repetition of the question and answer code cycle. The response code signal In this case, it must be provided several times on time be what security against an unjustified Opening process increased. If necessary, that can Question and / or answer code signal during repetition the question and answer code cycles are changed, for example by respective recalculation of the new question and / or answer code signal to be transmitted on the basis of the previous sent question and / or answer code signal and one internal, the transponder and the stationary transmit and Known key receiving unit.

Weiterhin können bei aktiver Betätigung des Transponder-Betätigungselements jeweils mehrere Codesignale vom Transponder, vorzugsweise mit wechselnder Codierung, ausgesendet werden. Dies erhöht zugleich die Sicherheit gegenüber unberechtigter Zugangsverschaffung durch Kopieren der Transponder-Codesignale, da diese dann jeweils in der richtigen zeitlichen Reihenfolge und mit richtigem zeitlichen Abstand gesendet werden müssen. Die stationäre Sende- und Empfangseinheit überprüft in diesem und dem im vorhergehenden Absatz erläuterten Fall auch die zeitliche Lage und zeitliche Reihenfolge der vom Transponder gesendeten Codesignale, das heißt überprüft zusätzlich ein Zeitkriterium.Furthermore, when the transponder actuating element is actively actuated several code signals from the transponder, preferably with alternating coding. This also increases security against unauthorized persons Obtaining access by copying the transponder code signals, because these are then in the correct time Sequence and sent at the correct time interval Need to become. The stationary transmitter and receiver unit checked in this and that explained in the previous paragraph Case also the temporal position and chronological order the code signals sent by the transponder, ie checked additionally a time criterion.

Alternativ ist es auch möglich, den Transponder derart auszulegen, daß er zwei unterschiedliche Codesignale speichern (oder generieren) kann, von denen das eine als Reaktion auf den Empfang eines Fragecodesignals und das andere als Reaktion auf die Betätigung des Betätigungselements ausgesendet wird. Die stationäre Sende- und Empfangseinheit überprüft das empfangene Codesignal, und gegebenenfalls die zusätzlich ermittelte Information, wobei sie dann, wenn sie zuvor ein Fragecodesignal ausgesendet hat, eine andere Information und/oder ein anderes Sollcodesignal erwartet und bereitstellt als bei fehlender vorhergehender Aussendung eines Fragecodesignals. Nur wenn das empfangene Codesignal, und gegebenenfalls die zusätzliche Information, mit dem aktuell bereitgestellten Sollcodesignal und/oder der aktuell erwarteten Information übereinstimmt, steuert die Sende- und Empfangseinrichtung die Entriegelung des Zugangs, läßt andernfalls aber den Zugang gesperrt. Wenn bei dem eingangs geschilderten Fall der Transponder durch einen unberechtigten Sender mit dem Fragecodesignal beaufschlagt wird, sendet er folglich ein Codesignal und/oder eine Information, die der stationären Sende- und Empfangseinheit den vorhergehenden Empfang eines Fragecodesignals signalisiert. Da die Sende- und Empfangseinheit aber kein solches Fragecodesignal ausgesendet hat und somit nur das der Transponder-Betätigungselementbetätigung zugeordnete Codesignal (bzw. die zugehörige zusätzliche Information) akzeptiert, bleibt der Zugang weiterhin gesperrt. Alternatively, it is also possible to design the transponder in such a way that that he can store two different code signals (or generate), one of which is in response to receiving a question code signal and the other in response sent out on the actuation of the actuating element becomes. The stationary transmitter and receiver unit checks this received code signal, and if necessary the additionally determined Information, being provided if it previously received a question code signal sent out another information and / or another target code signal is expected and provided than if there was no previous transmission of a question code signal. Only if the received code signal, and if necessary the additional information with the currently provided Target code signal and / or the currently expected information matches, controls the transmitting and receiving device unlocking the access, but otherwise leaves blocked access. If in the case described at the beginning the transponder through an unauthorized transmitter with the Question code signal is applied, it therefore sends Code signal and / or information that the stationary Sending and receiving unit the previous reception of a Question code signal signals. Since the sending and receiving unit but did not send out such a question code signal and thus only that of the transponder actuation element assigned code signal (or the associated additional information) accepted, access remains blocked.

Nur wenn die Sende- und Empfangseinrichtung tatsächlich vorher selbst das Fragecodesignal gesendet hat, wird der Zugang freigegeben. Ebenso wird der Zugang freigegeben, wenn das Codesignal aufgrund einer Betätigung des am Transponder vorhandenen Betätigungselements gesendet wird.Only if the transmitting and receiving device is actually beforehand even sent the question code signal, the access Approved. Access will also be released if the Code signal due to actuation of the transponder Actuator is sent.

Die Sende- und Empfangseinrichtung ist so ausgelegt, daß sie nach Aussenden eines Fragecodesignals ein Zeitfenster für eine kurze Zeitdauer von beispielsweise einer Sekunde öffnet und lediglich ein innerhalb dieses Zeitfensters empfangenes Antwortcodesignal akzeptiert. Das Zeitfenster kann durch Starten eines internen, auf das entsprechende Zeitintervall eingestellten Zeitgebers bei Aussenden des Fragecodesignals implementiert werden, wobei das Zeitfenster bei Ablauf des Zeitgebers wieder geschlossen wird.The transmitting and receiving device is designed so that it after sending out a question code signal, a time window for a opens for a short time, for example one second and only one received within this time window Answer code signal accepted. The time window can go through Start an internal, at the appropriate time interval set timer when sending the question code signal be implemented, the time window when the Timer is closed again.

Die Erfindung ist nicht nur bei Kraftfahrzeugen, sondern auch allgemein bei Türschließanlagen, beispielsweise von Haus- und/oder Wohnungs- oder Zimmertüren einsetzbar.The invention is not only in motor vehicles, but also generally for door locking systems, for example house and / or Apartment or room doors can be used.

Im Rahmen der Erfindung liegt auch ein Verfahren zur fernsteuerbaren Zugangskontrolle, bei dem eine Signalgenerierung, -Übermittlung und -Auswertung in der vorstehend geschilderten Weise durchgeführt werden.A method for remotely controllable is also within the scope of the invention Access control, where signal generation, - Transmission and evaluation in the above Way.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnungen näher beschrieben. Es zeigen:

Fig. 1
ein Ausführungsbeispiel der fernsteuerbaren Zugangskontrolleinrichtung,
Fig. 2
ein Ablaufdiagramm des Transponderbetriebs und
Fig. 3
ein Ablaufdiagramm des Betriebs der stationären Sende- und Empfangseinrichtung.
The invention is described below using an exemplary embodiment with reference to the drawings. Show it:
Fig. 1
an embodiment of the remote controllable access control device,
Fig. 2
a flow diagram of the transponder operation and
Fig. 3
a flowchart of the operation of the stationary transmitting and receiving device.

Fig. 1 zeigt einen Schlüssel in Form eines tragbaren Transponders, der eine Steuereinrichtung (zum Beispiel Mikrochip) 2, ein manuell vom Transponderbesitzer betätigbares Betätigungselement 3 und einen Sender/Empfänger 4 enthält. Der Transponder 1 kann übliche Schlüsselform aufweisen, als Chipkarte ausgebildet oder in sonstiger zweckmäßiger Weise aufgebaut sein. Das Betätigungselement 3 ist mit der Steuereinrichtung 2 verbunden, so daß diese jederzeit den Betätigungszustand des Betätigungselements 3 überwachen und abfragen kann. Weiterhin ist die Steuereinrichtung 2 mit dem Sender/Empfänger 4 verbunden und erkennt nicht nur von diesem empfangene Signale, sondern steuert diesen auch zur Aussendung von Codesignalen.1 shows a key in the form of a portable transponder, the one control device (for example microchip) 2, an actuating element which can be operated manually by the transponder owner 3 and a transmitter / receiver 4 contains. The Transponder 1 can have the usual key form, as a chip card trained or constructed in any other appropriate manner his. The actuator 3 is with the control device 2 connected, so that the operating state at all times of the actuator 3 monitor and query can. Furthermore, the control device 2 with the transmitter / receiver 4 connected and recognizes not only from this received signals, but also controls this for transmission of code signals.

In Fig. 1 sind weiterhin schematisch einige Komponenten eines Kraftfahrzeugs 5 dargestellt, bei dem die erfindungsgemäße Zugangskontrolleinrichtung eingesetzt wird. Das Kraftfahrzeug 5 enthält eine Sende- und Empfangseinrichtung 6, die über eine beispielsweise am Außenspiegel angebrachte Antenne 7 Codesignale senden und empfangen kann. Das Kraftfahrzeug weist ein von einem Benutzer betätigbares, extern zugängliches Betätigungsmittel beispielsweise in Form eines Türgriffs 8 oder entsprechender, an einer Tür oder einer sonstigen Fahrzeugkomponente angeordneter Bedientasten auf, bei deren Betätigung die Sende- und Empfangseinrichtung zur Aussendung eines Fragecodesignals zum Transponder 1 veranlaßt wird. Ferner ist ein Steuergerät, z.B. ein Türsteuergerät 9 vorhanden, das das Entriegeln und Verriegeln der Kraftfahrzeugtüren steuert und über eine Datenkommunikationsleitung, z.B. einen Bus 10 mit der Sende- und Empfangseinrichtung 6 verbunden ist. Die Sende- und Empfangseinrichtung 6 und das Türsteuergerät 9 können gegebenenfalls auch funktionell als eine Einheit zusammengefaßt sein.1 further schematically shows some components of a Motor vehicle 5 shown, in which the invention Access control device is used. The car 5 contains a transmitting and receiving device 6, which has a for example antenna 7 code signals attached to the outside mirror can send and receive. The motor vehicle points an externally accessible actuating means operable by a user for example in the form of a door handle 8 or corresponding, on a door or other vehicle component arranged control buttons when pressed the transmitting and receiving device for sending a Question code signal to transponder 1 is caused. Further is a control device, e.g. a door control unit 9 is present, which Unlocking and locking the vehicle doors controls and via a data communication line, e.g. a bus 10 with the transmitting and receiving device 6 is connected. The transmitting and receiving device 6 and the door control device 9 can possibly also functionally combined as one unit his.

In den Fig. 2 und 3 ist der Betrieb des Transponders 1 und der Sende- und Empfangseinrichtung 6 näher dargestellt. Gemäß Fig. 2 überprüft der Transponder 1 bei einem Schritt S1 kontinuierlich oder in regelmäßigen oder unregelmäßigen Abständen, ob über den Sender/Empfänger 4 ein Fragecodesignal von der Sende- und Empfangseinrichtung 6 empfangen wird. Wenn das der Fall ist, wird dies durch die Steuereinrichtung 2 erfaßt, die daraufhin den Sender/Empfänger 4 zum Aussenden eines in ihr gespeicherten oder durch sie generierten, definierten Codesignals steuert (Schritt S2). Zusätzlich wird eine bestimmte Information, beispielsweise die Kennung "0" gesendet. Alternativ kann die Steuereinrichtung 2 beim Schritt S2 den Sender/Empfänger 4 zum Aussenden eines speziellen, für den Fall eines vorhergehenden Fragecodesignalempfangs vorgesehenen Codesignals, beispielsweise des Codesignals a, steuern.2 and 3, the operation of the transponder 1 and the transmitting and receiving device 6 shown in more detail. According to 2, the transponder 1 continuously checks in a step S1 or at regular or irregular intervals, whether via the transmitter / receiver 4 a question code signal the transmitting and receiving device 6 is received. If that the case is, this is detected by the control device 2, which then the transmitter / receiver 4 to send out a in stored or generated by it, defined Code signal controls (step S2). In addition, a certain Information, for example the identifier "0" is sent. Alternatively, the control device 2 can in step S2 Transmitter / receiver 4 for sending a special, for the In the event of a previous question code signal reception Control code signal, such as code signal a.

Wenn beim Schritt S1 kein Fragecodesignalempfang ermittelt wird, schreitet der Ablauf zu einem Schritt S3 weiter, bei dem überprüft wird, ob das Betätigungselement 3 betätigt wird, was durch die Steuereinrichtung 2 erfaßt wird. Wenn dies der Fall ist, steuert die Steuereinrichtung 2 den Sender/Empfänger 4 zum Aussenden des Codesignals, nun aber mit einer anderen Information, beispielsweise der Kennung "1" (Schritt S4). Alternativ kann die Steuereinrichtung 2 den Sender/Empfänger 4 auch zur Aussendung eines anderen, sich vom Codesignal a unterscheidenden Codesignals b steuern. Wenn beim Schritt S3 ermittelt wird, daß das Betätigungselement 3 nicht betätigt ist, kehrt der Ablauf wieder zum Beginn der in Fig. 2 gezeigten Schrittfolge zurück. Dies ist auch im Anschluß an die Schritte S2 und S4 der Fall. Die Schritte S1 und S3 werden somit zyklisch durchlaufen. If no question code signal reception is determined in step S1 , the flow advances to step S3 which is checked whether the actuating element 3 is actuated becomes what is detected by the control device 2. If if this is the case, the control device 2 controls the transmitter / receiver 4 to send the code signal, but now with other information, for example the identifier "1" (Step S4). Alternatively, the control device 2 can Transmitter / receiver 4 also for sending another, yourself Control code signal b different from code signal a. If it is determined in step S3 that the actuating element 3 is not activated, the sequence returns to the beginning of the Fig. 2 shown sequence of steps back. This is also in the connection the steps S2 and S4 the case. The steps S1 and S3 are run through cyclically.

Fig. 3 zeigt den Betriebsablauf in der stationären Sende- und Empfangseinrichtung 6. Bei einem Schritt S5 wird überprüft, ob das am Kraftfahrzeug vorhandene, vom Kraftfahrzeugbenutzer betätigbare Betätigungsmittel, beispielsweise der Türgriff 8, betätigt wird. Wenn dies der Fall ist, veranlaßt die Sende- und Empfangseinrichtung 6 bei dem Schritt S6 die Aussendung eines definierten Fragecodesignals zum Transponder 1, und wartet dann für ein bestimmtes Zeitintervall bei einem Schritt S7 auf den Empfang eines vom Transponder 1 als Antwort zurückgesendeten Codesignals. Wenn während der vorgegebenen Zeitdauer kein Antwortsignal empfangen wird, kehrt der Betriebsablauf wieder zum Beginn der in Fig. 3 gezeigten Schrittfolge zurück. Wenn jedoch beim Schritt S7 ein Codesignal ermittelt wird, wird dieses bei einem Schritt S8 mit einem in der Sende- und Empfangseinrichtung 6 gespeicherten oder generierten Sollcodesignal verglichen. Weiterhin wird beim Schritt S8 überprüft, ob das empfangene Codesignal mit einer zusätzlichen Information, nämlich der Kennung "0", versehen ist. Wenn beide Überprüfungsergebnisse positiv ausfallen, wird dem Türsteuergerät 9 bei einem Schritt S9 das Entriegeln der Kraftfahrzeugtüre oder -türen befohlen. Andernfalls kehrt der Betriebsablauf ohne Kraftfahrzeugentriegelung wieder zum Beginn der in Fig. 3 dargestellten Schrittfolge zurück.Fig. 3 shows the operational flow in the stationary transmission and Receiving device 6. In step S5 it is checked whether whether the existing on the motor vehicle, by the motor vehicle user actuable actuating means, for example the door handle 8, is operated. If this is the case, the send and Receiving device 6 the transmission in step S6 a defined question code signal to transponder 1, and then waits for a certain time interval Step S7 to receive a response from transponder 1 returned code signal. If during the given Period no response signal is received, the returns Operating sequence again at the beginning of that shown in Fig. 3 Step back. If, however, a code signal in step S7 is determined, this is done with a step S8 stored in the transmitting and receiving device 6 or generated target code signal compared. Will continue in step S8 it checks whether the received code signal with an additional piece of information, namely the identifier "0" is. If both verification results are positive, unlocking the door control device 9 in a step S9 commanded the motor vehicle door or doors. Otherwise the operation returns without unlocking the vehicle again at the beginning of the sequence of steps shown in FIG. 3 back.

Die Sende- und Empfangseinrichtung kann auch so programmiert sein, daß sie dann, wenn sie ein- oder mehrfach falsche Antwortcodesignale erhalten hat, die Kommunikation für eine bestimmte Zeitdauer von beispielsweise 3 bis 10 Minuten abbricht, das heißt in dieser Zeit nicht mehr auf Antwortcodesignale reagiert und auch keine Fragecodesignale generiert. Alternativ oder zusätzlich kann die Sende- und Empfangseinrichtung auch so ausgelegt sein, daß ein Öffnungsvorgang nach ein- oder mehrfachem Empfang von falschen Antwortcodesignalen nur noch mit einem speziellen Schlüssel (oder Code) einer authorisierten Stelle durchgeführt werden kann.The transmitting and receiving device can also be programmed in this way be that if they have one or more wrong answer code signals has received communication for a particular Time period of, for example, 3 to 10 minutes, during this time that means no longer on response code signals responds and no question code signals are generated. Alternatively or additionally, the transmitting and receiving device can also be designed so that an opening process after one or more reception of wrong answer code signals only with a special key (or code) from an authorized Body can be carried out.

Wenn die in Fig. 2 gezeigte Alternative der Aussendung des Codesignals a beim Schritt S2 realisiert ist, wird beim Schritt S8 als Sollcodesignal das Codesignal a bereitgestellt, und bei Übereinstimmung mit dem empfangenen Codesignal zum Schritt S9 (Entriegelung) übergegangen. In diesem Fall ist beim Schritt S8 keine Kennungsüberprüfung durchzuführen.If the alternative of sending the Code signal a is realized in step S2, is in Step S8 provides the code signal a as the target code signal, and in accordance with the received code signal proceeded to step S9 (unlocking). In this Case, no identification check is to be carried out in step S8.

Wenn sich beim Schritt S5 ergibt, daß das Auslösemittel 8 nicht betätigt worden ist, wird zu einem Schritt S10 übergegangen, bei dem überprüft wird, ob ein Codesignal über die Antenne 7 empfangen wird. Wenn dies nicht der Fall ist, kehrt der Ablauf zum Beginn der in Fig. 3 gezeigten Schrittfolge zurück, so daß die Abfragen gemäß den Schritten S5 und S10 wiederholt durchlaufen werden, bis eine dieser Abfragen zum Ergebnis "ja" führt. Wenn dies beim Schritt S10 der Fall ist, wird beim Schritt S11 das empfangene Codesignal mit dem Sollcodesignal verglichen und weiterhin überprüft, ob die mit dem empfangenen Codesignal übertragene Information der Kennung "1" entspricht. Ist dies der Fall, wird zum Schritt S9 übergegangen und die Kraftfahrzeugtüre oder -türen entriegelt. Alternativ kann beim Schritt S11 als Sollcodesignal das Codesignal b gebildet werden und überprüft werden, ob das empfangene Codesignal mit diesem Sollcodesignal übereinstimmt. In diesem Fall ist keine Kennungsüberprüfung erforderlich. Als weitere Alternative kann die zusätzlich mit dem Codesignal vom Transponder übertragene Information auch in der Anzahl der Wiederholung der Codesignale, deren Frequenz, Amplitudenverlauf oder in einem anderen Parameter bestehen, wobei dann dieser Parameter bei den Schritten S8 und S11 überprüft wird.If it is determined in step S5 that the triggering means 8 has not been operated, a step is made to step S10, in which it is checked whether a code signal via the Antenna 7 is received. If not, return the sequence at the beginning of the sequence of steps shown in FIG. 3 back so that the queries according to steps S5 and S10 be repeated until one of these queries for Result "yes" leads. If so at step S10, in step S11, the received code signal with the target code signal compared and further checked whether the with the received code signal transmitted information of the identifier "1" corresponds. If this is the case, the process moves to step S9 and unlocks the motor vehicle door or doors. Alternatively, the code signal can be used as the target code signal in step S11 b are formed and checked whether the received Code signal matches this target code signal. In in this case no ID verification is required. As Another alternative can be with the code signal Number of items of information transmitted by the transponder the repetition of the code signals, their frequency, amplitude course or consist of another parameter, where then this parameter is checked in steps S8 and S11.

Claims (10)

Fernsteuerbare Zugangskontrolleinrichtung, insbesondere für ein Kraftfahrzeug mit einer stationären Sende- und Empfangseinrichtung (6), die bei Betätigen eines Auslösemittels (8) ein Fragecodesignal aussendet, ein von einem tragbaren Transponder (1) erzeugtes Codesignal empfängt und bei Übereinstimmung des Codesignals mit einem internen Sollcodesignal ein Entriegelungssignal an eine Entriegelungseinheit (9) abgibt, wobei der Transponder (1) ein manuell betätigbares Betätigungselement (3) aufweist, bei dessen Betätigung der Transponder (1) ein Codesignal aussendet, dadurch gekennzeichnet, daß der Transponder (1) derart ausgelegt ist, daß er mit dem Codesignal eine Information aussendet, die angibt, ob das Codesignal als Reaktion auf ein empfangenes Fragecodesignal oder als Reaktion auf eine Betätigung des Betätigungselements (3) hin erzeugt wird, und daß die Sende- und Empfangseinrichtung (6) diese Information bei der Entscheidung über die Erzeugung des Entriegelungssignals berücksichtigt. Remote controllable access control device, in particular for a motor vehicle a stationary transmitting and receiving device (6) which, when a triggering means (8) is actuated, sends out a question code signal, receives a code signal generated by a portable transponder (1) and, if the code signal matches an internal target code signal, an unlocking signal to an unlocking unit (9) issues, wherein the transponder (1) has a manually actuable actuating element (3), the transponder (1) of which emits a code signal when actuated, characterized in that the transponder (1) is designed such that it transmits with the code signal information indicating whether the code signal is generated in response to a received question code signal or in response to an actuation of the actuating element (3), and that the transmitting and receiving device (6) takes this information into account when deciding on the generation of the unlocking signal. Zugangskontrolleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Information einen Teil des Codesignals bildet.Access control device according to claim 1, characterized characterized in that the information is part of the code signal forms. Zugangskontrolleinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Information eine dem Codesignal hinzugefügte Kennung ist.Access control device according to claim 1 or 2, characterized in that the information is the code signal added identifier is. Zugangskontrolleinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Information in einer entsprechenden Anzahl von Wiederholungen des Aussendens des Codesignals besteht. Access control device according to claim 1, characterized characterized in that the information in a corresponding Number of repetitions of the transmission of the code signal exists. Zugangskontrolleinrichtung nach dem Oberbegriff des Anspruch 1, dadurch gekennzeichnet, daß der Transponder (1) als Reaktion auf den Empfang eines Fragecodesignals ein anderes Codesignal als bei Betätigung des Betätigungselements (3) sendet.Access control device according to the preamble of Claim 1, characterized in that the transponder (1) another in response to receiving a question code signal Code signal than when actuating the actuating element (3) sends. Zugangskontrolleinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Sende- und Empfangseinrichtung (6) zwei unterschiedliche Sollcodesignale speichert oder generiert, von denen das eine nach Aussenden eines Fragecodesignals für den Vergleich mit einem vom Transponder (1) gesendeten Codesignal eingesetzt wird, und das andere Sollcodesignal für einen Vergleich mit einem ohne vorheriges Aussenden des Fragecodesignals empfangenen Codesignal herangezogen wird.Access control device according to claim 5, characterized characterized in that the transmitting and receiving device (6) stores or generates two different target code signals, one of which after sending out a question code signal for comparison with one sent by the transponder (1) Code signal is used, and the other target code signal for a comparison with one without sending out beforehand of the question code signal received code signal used becomes. Zugangskontrolleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Sende- und Empfangeinrichtung eine Zeitgeberfunktion aufweist und nur solche Antwortcodesignale auswertet, die innerhalb eines durch die Zeitgeberfunktion vorgegebenen Zeitintervalls nach Aussenden eines Fragecodesignals empfangen worden sind.Access control device according to one of the preceding Claims, characterized in that the transmission and Receiving device has a timer function and only evaluates such response code signals within a time interval specified by the timer function Sending a question code signal have been received. Zugangskontrolleinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Sende- und Empfangeinrichtung nach Empfang eines richtigen Antwortcodesignales erneut ein Fragecodesignal aussendet und ein als Reaktion hierauf vom Transponder erhaltenes Antwortcodesignal überprüft, wobei dieser Vorgang gegebenenfalls mehrfach wiederholbar ist.Access control device according to one of the preceding Claims, characterized in that the transmission and Receiving device after receiving a correct response code signal sends out a question code signal again and one in response thereupon response code signal received from the transponder checked, this process possibly repeated several times is. Zugangskontrolleinrichtung nach Anspruch 8, dadurch gekennzeichnet, daß sich das oder die Fragecodesignale und/oder das oder die Antwortcodesignale, die bei der Wiederholung des Frage- und Antwortcodesignalsendezyklus gesendet werden, von dem bei dem ersten Zyklus gesendeten Fragecodesignal und/oder Antwortcodesignal unterscheiden.Access control device according to claim 8, characterized characterized in that the question code or signals and / or that or the response code signals that are used in the repetition of the question and answer code signal transmission cycle from the question code signal sent in the first cycle and / or distinguish response code signal. Tragbarer Transponder (1), insbesondere Kraftfahrzeug-Schlüssel, zur Verwendung in einer Zugangskontrolleinrichtung gemäß einem der vorhergehenden Ansprüche, mit einem Sender/Empfänger (4) und einem manuell betätigbaren Betätigungselement (3), dadurch gekennzeichnet, daß der Transponder (1) derart ausgelegt ist, daß er bei Empfang eines Fragecodesignals ein Codesignal, gegebenenfalls mit einer zusätzlichen Information, sendet, das bzw. die sich von dem nach Betätigen des Betätigungselements (3) gesendeten Codesignal und/oder der diesem hinzugefügten Information unterscheidet.Portable transponder (1), in particular motor vehicle key, for use in an access control facility according to one of the preceding claims, with a Transmitter / receiver (4) and a manually operated actuator (3), characterized in that the transponder (1) is designed such that it receives a question code signal a code signal, possibly with an additional one Information that is sent from the after pressing of the actuating element (3) sent code signal and / or the information added to it.
EP98123009A 1998-12-04 1998-12-04 Remote-controlled access control device, in particular for a motor vehicle and portable transponder therefor Expired - Lifetime EP1006248B1 (en)

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EP98123009A EP1006248B1 (en) 1998-12-04 1998-12-04 Remote-controlled access control device, in particular for a motor vehicle and portable transponder therefor
DE59809979T DE59809979D1 (en) 1998-12-04 1998-12-04 Remote controllable access control device, in particular for a motor vehicle, and portable transponder designed for this
US09/455,600 US6577227B1 (en) 1998-12-04 1999-12-06 Remote-controlled access control device, in particular for a motor vehicle, and portable transponder which is configured for it

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US6577227B1 (en) 2003-06-10
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