[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0848123B1 - Système télécommandé d'entrée sans clé - Google Patents

Système télécommandé d'entrée sans clé Download PDF

Info

Publication number
EP0848123B1
EP0848123B1 EP97117590A EP97117590A EP0848123B1 EP 0848123 B1 EP0848123 B1 EP 0848123B1 EP 97117590 A EP97117590 A EP 97117590A EP 97117590 A EP97117590 A EP 97117590A EP 0848123 B1 EP0848123 B1 EP 0848123B1
Authority
EP
European Patent Office
Prior art keywords
transponder
communication processor
receiver
low frequency
radio frequency
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.)
Expired - Lifetime
Application number
EP97117590A
Other languages
German (de)
English (en)
Other versions
EP0848123A3 (fr
EP0848123A2 (fr
Inventor
Herbert Meier
Michael Knebelkamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Deutschland GmbH
Original Assignee
Texas Instruments Deutschland GmbH
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
Priority claimed from US08/728,844 external-priority patent/US6323566B1/en
Application filed by Texas Instruments Deutschland GmbH filed Critical Texas Instruments Deutschland GmbH
Publication of EP0848123A2 publication Critical patent/EP0848123A2/fr
Publication of EP0848123A3 publication Critical patent/EP0848123A3/fr
Application granted granted Critical
Publication of EP0848123B1 publication Critical patent/EP0848123B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G07C2009/00341—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 keyless data carrier having more than one limited data transmission ranges
    • G07C2009/00357—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 keyless data carrier having more than one limited data transmission ranges and the lock having more than one limited data transmission ranges
    • 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
    • G07C2009/00388—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 code verification carried out according to the challenge/response method
    • G07C2009/00396—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 code verification carried out according to the challenge/response method starting with prompting the keyless data carrier
    • 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
    • G07C2009/00412—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 the transmitted data signal being encrypted
    • 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
    • G07C2009/0042—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 the transmitted data signal containing a code which is changed
    • G07C2009/00476—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 the transmitted data signal containing a code which is changed dynamically
    • G07C2009/00492—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 the transmitted data signal containing a code which is changed dynamically whereby the code is a rolling code
    • 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
    • G07C2009/00507—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 keyless data carrier having more than one function
    • 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
    • G07C2009/00777—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 induction
    • 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

Definitions

  • This invention relates to the field of compact, radio frequency (RF) transponders of the type known to be useful in systems for security and information storage, access control, entry validation and identification, and in other comparable systems.
  • RF radio frequency
  • Remote keyless entry systems require an interrogator circuit built into a road vehicle or building, for example, and a remote transponder which incorporates transmitting and receiving circuits in a compact case that may be carried by a person in a key, a key fob, a badge, a tag or in any similar miniaturized housing. More particularly this invention relates to a transponder in a road vehicle or automotive remote keyless entry and immobalization system which is functional over an increased range in active and passive modes of operation. This invention further relates to a transponder which utilizes a secure challenge-response encryption technique to provide greater security for the user.
  • Compact passive low frequency transponders using a frequency of 134.2 kilohertz (134.2 kHz), for example, for passive entry and immobilizer functions and radio frequency remote control transmitters, using a frequency of 433 megahertz (433 MHz), for example, for use in remote keyless entry and security systems for automobiles are generally known. These systems allow access to the automobile without the use of battery power, if the transponder is used in close proximity to the interrogator, and allow the operator to transmit commands such as locking and unlocking doors, hood and trunk, controlling vehicle lighting and ignition, and arming and disarming the anti-theft security system to the vehicle over greater distances.
  • 134.2 kilohertz 134.2 kHz
  • 433 MHz 433 megahertz
  • the transponders used may employ an interrogator-responder arrangement with an EEPROM data storage device and a small capacitor that serves as an energy accumulator, charged by the energy provided by the radio frequency interrogation, to provide power for the transponder.
  • the transponder is, thus, sufficiently small to supplement or replace a conventional vehicle door and ignition key.
  • Such a transponder is disclosed by Schuermann at at. In U.S. Patent 5,053,774.
  • EP-A-0 690 190 discloses a remote keyless entry system with a key module and an in-vehicle lock module.
  • the key module comprises a remote control transmitter using a high frequency and a transponder for receiving and transmitting low frequency signals.
  • the remote control transmitter Upon actuation of a push button, the remote control transmitter transmits an encoded high frequency signal to the lock module. If the lock module receives the high frequency signal properly, it starts transmitting control signals having a frequency of 125 kH. If the key module is within a distance of about 70 cm from the lock module, it receives the control signals and responds by sending a driving signal to the lock module for locking or unlocking the vehicle doors.
  • EP-A-0 767 286, discloses a remote keyless entry and immobilization system for automotive use.
  • the system comprises a key, which uses high frequency transmission for remote operation such as opening and closing the door locks and low frequency transmission when the key is inserted in the ignition lock of the vehicle for two way communication between the automobile and the key.
  • the content of the document is comprised in the state of the art according to Article 54 (3).
  • transponder systems in current use generally have a limited operating range.
  • Current remote control transponder systems require battery power for proper operation and are not functional, in a passive mode, that is, when operated without a battery.
  • the present invention provides a road vehicle remote keyless entry system which is functional over an increased range in the active and passive modes of operation while increasing security by the use of a secure challenge-response encryption technique.
  • the present invention provides a secure road vehicle keyless entry system comprising an in-vehicle communication processor and a remote transponder.
  • the communication processor and transponder communicate in parallel paths, a first path being a radio frequency transmission from the transponder to the communication processor and a second path being a low frequency, encrypted two way transmission between the transponder and the communication processor.
  • the first and second paths are both used to communicate between the in-vehicle communication processor and the transponder in response to a manual stimulus to the remote transponder.
  • the present invention further provides a method of vehicle keyless entry comprising the steps of claim 12.
  • the radio frequency transmission and the low frequency, encrypted transmission can be compared by the communication processor for authentication of the transmitted data or command before the communication processor authorizes the desired operation and, if one communication channel is affected by interference, the second communication channel may be used as a backup.
  • the communication processor has a radio frequency receiver, a low frequency transmitter/receiver and a controller capable of sending and receiving signals via the low frequency transmitter/receiver and receiving signals via the radio frequency receiver.
  • the transponder has a radio frequency transmitter that transmits a signal to the communication processor upon receipt of a manual stimulus and a low frequency transmitter/receiver capable of reading the signals received from the communication processor and preparing an encrypted response for transmission to the communication processor.
  • the communication processor authorizes the desired operation such as, for example, locking or unlocking the car, arming or disarming the anti-theft alarm system or the performance of vehicle related initialization functions such as seat, seat belt and vehicle mirror adjustments and lighting the vehicle interior lights.
  • the radio frequency receiver in the communication processor and the radio frequency transmitter in the transponder may be transmitter/receivers, each capable of performing both the receiving and transmitting functions.
  • radio frequency transmitter/receivers are used, both the radio frequency communication and the low frequency communication between the communication processor and the transponder will be two way transmissions used to transmit data between the two devices.
  • the immobilization function which locks the vehicle and initiates operation of the alarm system
  • the remote keyless entry function which, for example, resets the alarm system and authorizes unlocking the vehicle and performance of vehicle related initialization functions such as seat, seat belt and vehicle mirror adjustments and lighting the vehicle interior lights.
  • FIG. 1 illustrates the functional elements and data paths of one embodiment of the road vehicle keyless entry system of the present invention.
  • road vehicle means all of the various types of vehicles that are operated upon the highway system including, but not limited to, automobiles, trucks, vans, motorcycles, buses and motorhomes. It is intended that the arrangement shown in FIG. 1, and in the following figures, shall be interpreted as an illustrative system configuration and that other possible configurations, more adapted to the specific user needs, exist within the scope of the disclosure herein. Further, the use of like reference numbers to identify components within the various figures indicates the presence of similar elements within each of the different figures.
  • the road vehicle keyless entry system includes a communication processor 11 that is located within the vehicle and a remote, miniaturized transponder 15.
  • Communication processor 11 may also be named an interrogator or called by other names indicating its function as a unit which requests and receives information from the remote transponder 15.
  • Communication processor 11 has a radio frequency receiver 12, a low frequency transmitter/receiver 13 and a controller 14 which is capable of sending and receiving signals via the low frequency transmitter/receiver 13 and receiving signals via the radio frequency receiver 12.
  • Controller 14 combined with low frequency transmitter/receiver 13 is preferably, a TIRIS reader, the term TIRIS being an acronym known to those skilled in the art as denoting certain types of devices or equipment utilizing the transponder arrangement and TIRIS reader disclosed in Schuermann et al., U.S. Patent 5,053,774.
  • the transponder 15 has a radio frequency transmitter 16 that transmits a signal to communication processor 11 upon receipt of a stimulus manually produced by an operator's actuation of one of a plurality of push buttons 18. While push buttons 18 are shown for convenience, any manually operatable, pulse creating switch such as, for example, a toggle switch or a rotary switch may be used.
  • Transponder 15 also has a low frequency transmitter/receiver 17 capable of reading signals received from communication processor 11, preparing an encrypted response and transmitting the encrypted response to communication processor 11.
  • communication processor 11 located within the vehicle and remote transponder 15 communicate with one another to permit a flow of information to initiate operations at the vehicle. Communication between the two devices is initiated by the vehicle operator who pushes a button 18 on transponder 15 which responds by transmitting a radio frequency (RF) signal to communication processor 11 and a signal to low frequency transmitter/receiver 17 to prepare it for interrogation by communication processor 11.
  • RF radio frequency
  • the signal transmission, using a rolling code for security, is a one way communication or data transfer from transponder 15 to communication processor 11 using a radio frequency signal of 433 megahertz (433MHz), for example, or another suitable frequency.
  • communication processor 11 transmits a low frequency interrogation to transponder 15 requesting identification and verification of the original radio frequency signal.
  • a low frequency signal such as, for example, 134.2 kilohertz (134.2 kHz)
  • 134.2 kHz 134.2 kilohertz
  • Security of the low frequency signal is maintained by using an encryption key which is known only to communication processor 11 in the vehicle and remote transponder 15.
  • transponder 15 provides an encrypted response containing the correct vehicle code to communication processor 11 in response to the interrogation
  • communication processor 11 authorizes the desired operation within the vehicle.
  • This use of encryption logic and interrogation and response via the low frequency data transmission in addition to the rolling code used for security with the radio frequency signal, greatly increases the security of the road vehicle keyless entry system.
  • radio frequency transmitter and a receiver are used. It is further contemplated that radio frequency receiver 12 in communication processor 11 and radio frequency transmitter 16 in transponder 15 may be transmitter/receivers, each capable of performing both the receiving and transmitting functions. When radio frequency transmitter/receivers are used, both the radio frequency communication and the low frequency communication between communication processor 11 and transponder 15 will be two way transmissions used to transmit data between the two devices. This use of two way radio frequency communication is illustrated by the solid and dotted signal lines between radio frequency receiver 12 and radio frequency transmitter 16.
  • FIG. 2 is a block schematic of the functional elements and data paths of remote transponder 15 of this embodiment of the invention showing radio frequency transmitter 16 and low frequency transmitter/receiver 17.
  • transponder 15 includes radio frequency transmitter 16 which operates at a frequency of 433 megahertz (433MHz) using a rolling code for security.
  • the present transponder 15 further includes low frequency transmitter/receiver 17 which provides a two way exchange of data with the communication processor 11 in the vehicle using an encrypted signal having a frequency of 134.2 kilohertz (134.2 kHz).
  • low frequency transmitter/receiver 17 allows access to, or enables, additional features such as, for example, programming, the exchange and verification of identification and the use of encryption logic and the transmission of various desired commands to the vehicle, all of which can significantly increase the security of the road vehicle remote keyless entry system.
  • a vehicle operator provides a manual stimulus at the remote transponder 15 to initiate a command - the operator pushes one of the plurality of switches or push buttons 18 to indicate the action desired at the vehicle.
  • Transponder 15 includes radio frequency transmitter 16 which includes control logic module 29, radio frequency modulator/driver 28 and random number generator 30.
  • radio frequency transmitter 16 transmits a signal, the desired command, to radio frequency receiver 12 in communication processor 11 at the vehicle and simultaneously transfers the command to low frequency transmitter/receiver 17 via the serial interface.
  • power to passive, low frequency transmitter/receiver 17 is provided by battery at terminal ACT on the control logic module 21 and data are received using clock and data input ports, terminals SC and SI.
  • low frequency transmitter/receiver 17 includes encryption logic module 22, memory 23, radio frequency circuitry 24, shift register 25, tuned antenna, a parallel resonant circuit, 26 and charge or power capacitor 27.
  • Low frequency transmitter/receiver 17 transmits the remote command to low frequency transmitter/receiver 13 which was switched to the receive mode by controller 14 when radio frequency receiver 12 detected the carrier and command signal from radio frequency transmitter 16.
  • the command may be received by communication processor 11 through the use of low frequency transmission signals although the transmission range for the low frequency signal is reduced. Authentication of the command may be confirmed by control processor 11 transmitting a challenge to the transponder 15 using low frequency transmitter/receiver 13.
  • the encryption logic module 22 encrypts the challenge using the encryption key stored within memory 23 (not readable) and transfers the encrypted challenge and a serial number, which is also stored within memory 23, to the radio frequency transmitter 16.
  • the encrypted challenge and serial number, together with the repeated command, are transmitted in parallel to communication processor 11 by both radio frequency transmitter 16 and low frequency transmitter/receiver 17 as a complete response to the challenge to authenticate the first command transmission.
  • Controller 14 executes the command, or authorizes other devices to execute the command, if the correct vehicle code or signature is received in response to the challenge.
  • the challenge-response feature provides greatly increased security over the rolling code system. It is now also possible to transmit additional data or programming information between the remote transponder 15 and the communication processor 11 using the low frequency transmitter/receiver 17.
  • the radio frequency receiver 12 in communication processor 11 and radio frequency transmitter 16 in transponder 15 may be transmitter/receivers, each capable of performing both the receiving and transmitting functions.
  • radio frequency transmitter/receivers When radio frequency transmitter/receivers are used, both the radio frequency communication and the low frequency communication between communication processor 11 and transponder 15 will be two way transmissions used to transmit data between the two devices.
  • a function or transmission range of at least approximately one meter (1 m) is necessary.
  • this range is difficult to reach with passive transponders, even when the transponder has an antenna the size or a credit card. Therefore, an active function may be provided by the inclusion of a battery as shown in FIG. 3, a block schematic of a low frequency transmitter/receiver 50, another embodiment of the low frequency transmitter/receiver 17 for remote transponder 15.
  • Low frequency transmitter/receiver 50 includes logic control module 51, receiver control module 52, transmitter control module 53, the end of burst detector 54, the adaptive pluck logic module 55, signal level converter 56, clock regenerator 57, divider 58, threshold detector 59, resonant circuit 60, charge capacitor 61 and diodes 62, 63 and 64 connected as shown in FIG. 3.
  • Resonate circuit 60 has a capacitor connected in parallel with an inductor with the value of each component selected to provide a resonant circuit that is resonant at a radio frequency of 134.2 kilo hertz (134.2 kHz).
  • Diodes 62, 63 and 64 are symbols for the necessary one way function, that is, the signal is conducted in only one direction. Diodes 62, 63 and 64 are preferably Schottky diodes with low feed through voltage, if possible in the selected semiconductor process, although they may be normal semiconductor diodes such as 1N4148 diodes or field effect transistor (FET) circuits using switched gates.
  • FET field effect transistor
  • the vehicle operator initiates a command by providing a manual stimulus at the door handle of the vehicle or with remote transponder 15 - the operator operates the door handle or pushes one of the plurality of switches or push buttons 18 to indicate the action desired at the vehicle.
  • the communication processor 11 or interrogator After receipt of a radio frequency signal from transponder 15, the communication processor 11 or interrogator transmits a low frequency signal (134.2 kHz) to low frequency transmitter/receiver 50 which, when received by resonant circuit 60, provides electrical energy to charge capacitor 61 in addition to asking transponder 15 for confirmation of the command or action request.
  • the low frequency voltage is rectified by diode 62 and charges capacitor 61.
  • the voltage level reached on charge capacitor 61 depends upon the distance between the communication processor 11 and the transponder 15 antennas which are typically resonance circuits having a high quality factor such as, for example, resonant circuit 60. If sufficient energy is accumulated so that the voltage on charge capacitor 61 exceeds a certain limit such as one volt, for example, the threshold detector 59 switches the battery supply voltage from battery 65, provided at terminal VBAT, to connect the battery voltage through connections VCC to the logic circuitry of low frequency transmitter/receiver 50. The threshold detector 59 prevents discharge of battery 65 when transponder 15 is in the presence of electromagnetic interference such as, for example, if the transponder is placed upon a television set.
  • a certain limit such as one volt
  • the threshold detector 59 may be an active or a passive device. Increasing the sensitivity requires more stand-by current from battery 65, with a resulting decrease in battery life. The threshold detector may also be located at the radio frequency signal input where higher signal amplitudes are normally available. If battery 65 is not available, voltage is still provided to the logic circuitry by charge capacitor 61 through diodes 63 and 64. The resonant circuit 60 is separated from the integrated circuit power supply during the reception of data, the write phase, from the communication processor 11.
  • the signal received by transponder 15 and the level of oscillation of the resonant circuit 60 is usually low when the distance between the communication processor 11 and the transponder 15 is great.
  • the use of battery 65 to provide voltage to the circuit enables the low frequency transmitter/receiver 50 circuit to receive and react to transmitted signals having lower amplitudes than would be possible in the passive mode of operation, that is, without battery power.
  • voltage is monitored by the end of burst detector 54. When the amplitude of the voltage signal drops and the resonant circuit 60 resonates with its own frequency instead of being enhanced by the signal from communication processor 11, the end of burst detector 54 activates clock regenerator 57 and the pluck logic module 55 which preferably provides peak pluck and slope control.
  • the pluck logic module 55 enhances oscillation whenever a voltage amplitude drop caused by the resonant circuit loss factor is detected. Pluck logic, the pluck logic module 55 and the peak detector used in pluck logic are described in U.S. Patent 5,283,529, U.S. Patent 5,227,740 and U.S. Patent 5,126,745
  • the provision of battery power enables the circuit to operate properly with the reception of a lower signal amplitude than would be possible in the passive mode. Voltage amplitude drops during and after the write phase are detected by the end of burst detector 54 over greater distances because internal current sources and digital circuits of low frequency transmitter/receiver 50 are already fully functional as battery 65 provides the necessary power rather than relying upon the signal received by charge capacitor 61 to provide power, as would be required in the passive mode of operation.
  • the low frequency transmitter/receiver 50 is able to regenerate even small signal amplitudes which helps pluck circuit 55 enhance the oscillation during the free running times, during the reception of write signals and during the transmission of response data.
  • the distance over which data may be received by transponder 15 using pulse width modulation is significantly enhanced when compared to the distance possible when a transponder operating in the passive mode is used.
  • communication processor 11 transmits a challenge such as, for example, a random number to transponder 15.
  • This challenge is received by low frequency transmitter/receiver 50 and is encrypted, using the encryption key stored in its memory, to become the signature of the transponder 15.
  • This generated signature, the encrypted random number, and the serial number of transponder 15 are transmitted to the communication processor 11 by the low frequency transmitter/receiver 50 and, at the same time, transferred to radio frequency transmitter 16 of transponder 15 using the internal serial input/output interface circuitry.
  • the activate signal on terminal ACT of low frequency transmitter/receiver 50 switches the battery 65 voltage, provided at terminal VBAT, to connect through connections VCC to the level converter 56 which maintains the correct input and output signal voltage levels under all voltage supply levels.
  • a "timeout" or response signal is generated in accordance with the disclosure above for transmission to communication processor 11.
  • Divider 58 counts the radio frequency oscillations regenerated by clock regenerator 57 during the end of burst period to determine when the response or "timeout" signal is to be generated and switches the battery voltage, terminal VBAT, to the resonant circuit 60 to increase the transmission frequency amplitude and, therefore, to increase the transmission reading distance and the signal robustness against noise or other interference.
  • the distance over which data may be transmitted by transponder 15 of this invention using frequency shift keying (FSK) is enhanced when compared to the distance possible when a transponder operating in the passive mode is used.
  • the radio frequency transmitter 16 transmits the signature and serial number with a command that the communication processor 11 accept the parallel low frequency response as a backup and as a security check.
  • This dual signal, the parallel transmission of a radio frequency signal and a low frequency signal enhances the security against noise and manipulation of the command signals.
  • Operation may also be enhanced by using transmitter/receivers as the radio frequency receiver 12 in communication processor 11 and radio frequency transmitter 16 in transponder 15.
  • transmitter/receivers as the radio frequency receiver 12 in communication processor 11 and radio frequency transmitter 16 in transponder 15.
  • radio frequency transmitter/receivers are used, both the radio frequency communication and the low frequency communication between communication processor 11 and transponder 15 will be two way transmissions, further enhancing the security against noise and manipulation of the command signals.
  • the road vehicle keyless entry system 10 may also be used to replace the ignition key of the vehicle.
  • the operator When the vehicle operator has entered the vehicle and wishes to start the engine, the operator will initiate a new command process with a manual stimulus of a push button on or near the vehicle dash board, for example. This stimulus initiates a new challenge/response phase via the low frequency transmitter/receivers. Operation of the keyless entry system 10 after receipt of the low frequency signal is as described above.
  • FIG. 4 a block schematic illustrates modifications to the remote transponder 15 of the road vehicle keyless entry system 10 of FIG. 1.
  • Communication processor 11 is located within the vehicle and miniaturized transponder 15 is a remote unit which may be carried by the vehicle operator.
  • the apparatus and operation of communication processor 11 and transponder 15 are as described in regard to FIG. 1 above except that the serial input/output interface circuitry between radio frequency transmitter 16 and low frequency transmitter/receiver 17 is replaced by driver/demodulator circuit 19 and coupling coil 20 to provide for the contactless transfer of data between the two circuits.
  • battery voltage is provided to radio frequency transmitter 16 and voltage is transferred to low frequency transmitter/receiver 17 by signal transmission through coupling coil 20.
  • Radio frequency transmitter 16 which transmits the command to communication processor 11 and at the same time transfers the command data to low frequency transmitter/receiver 17.
  • radio frequency receiver 12 and radio frequency transmitter 16 may be transmitter/receivers allowing two way radio frequency communication in addition to the two way low frequency communication. It is, thus, possible to initiate commands by manual stimulation of push buttons, similar to push buttons 18, located on communication processor 11.
  • Communication processor 11 would transmit the command to radio frequency transmitter 16, which would then be a transmitter/receiver, and it would request data from low frequency transmitter/receiver 17 to respond to the command from communication processor 11. Solid and dotted lines are shown in FIG.
  • Radio frequency transmitter 16 and low frequency transmitter/receiver 17 may, thus, be in separate compact cases, allowing separate use of a passive transponder for operation over short distances, separate use of an active, battery powered radio frequency transponder for remote control functions over greater distances and combined use of the passive and active transponder functions over the full desired operating range, thus allowing adaption of the transponder size to the size the vehicle operator is willing to carry.
  • FIG. 5 is a block schematic illustrating modifications to the remote transponder of the road vehicle keyless entry system of FIG. 4.
  • the driver/demodulator circuit 19 interface of FIG. 4 is replaced or complimented by a write distance expander interface circuit 19a which cooperates with radio frequency transmitter 16 and low frequency transmitter/receiver 17 to provide a transponder 15 that is operable at an increased distance between transponder 15 and communication processor 11 with low frequency transmitter/receiver 17 operating in the passive mode, that is without a voltage directly supplied by a battery.
  • Road vehicle keyless entry system 10 has communication processor 11 and transponder 15.
  • the functional elements and operation of communication processor 11 are described above.
  • Transponder 15 has a low frequency transmitter/receiver 17 that operates on a low frequency such as, for example, 134.2 kilohertz (134.2 kHz) to provide two way communication, a challenge and encrypted response, with communication processor 11.
  • Transponder 15 also has a radio frequency transmitter 16 that operates on a radio frequency such as, for example, 433 megahertz (433 MHz).
  • Radio frequency transmitter 16 is equipped with a battery and the range in which transponder 15 can receive the low frequency signal is increased by write distance expander interface circuit 19a.
  • the radio frequency transmitter 16 and low frequency transmitter/receiver 17 must be in a common housing for operation over extended distances, but may be separated from one another while providing basic operations at shorter operating ranges.
  • the radio frequency transmitter 16 is typically used to provide security functions such as, for example, light switching, alarm arming and disarming and similar functions.
  • the low frequency transmitter/receiver 17 is typically used in the passive operating mode to provide keyless entry and immobilization functions at short range, for example at distances less than one meter (1 m).
  • a challenge or interrogation, a random number is transmitted from communication processor 11 using a ferrite or air coil antenna and pulse pause modulation at a frequency of, for example, 134.2 kilohertz (134.2 kHz) to the low frequency transmitter/receiver 17 of transponder 15.
  • Low frequency transmitter/receiver 17 encrypts the challenge using a secret encryption key held in its memory (not readable) to produce a signature and responds by transmitting the encrypted challenge, its signature, and the transponder serial number to the communication processor 11 using a frequency shift keying (FSK), frequency modulation, signal at a frequency of, for example, 134.2 kilohertz (134.2 kHz). If the distance between communication processor 11 and transponder 15 is too far, this communication will fail. To achieve a greater functional range, the write distance expander 19a interface circuit is provided.
  • FSK frequency shift keying
  • FIG. 6 One embodiment of the write distance expander 19a is shown in FIG. 6 in a block schematic illustrating the expander's functional elements and data paths.
  • a block schematic is used in FIG. 7 to illustrate the functional elements and data paths of a second embodiment of the write distance expander 19a.
  • Write distance expander 19a interface circuit includes resonant circuit 80 which consists of coil 81, which also serves as a coupling coil, and a capacitor tuned to a frequency of 134.2 kilohertz (134.2 kHz); radio frequency voltage limiter 82 with a battery charge circuit; diode 83 connected to charge capacitor 84; threshold detector 85; clock regenerator 86, an operational amplifier used as a comparator; envelope rectifier 87; end of burst detector 88; and a 134.2 kilohertz (134.2 kHz) clock generator module 89 which may, for example, be a pluck logic module or a separate oscillator with a divider gated by activation signal TXCT.
  • resonant circuit 80 which consists of coil 81, which also serves as a coupling coil, and a capacitor tuned to a frequency of 134.2 kilohertz (134.2 kHz); radio frequency voltage limiter 82 with a battery charge circuit; diode 83 connected to charge capacitor 84;
  • Coil 81 which is, for example, a small ferrite or air coil, is located proximate the antenna of low frequency transmitter/receiver 17 at a position in which the coil 81 can receive the radio frequency signals from communication processor 11 and the resonant circuit of low frequency transmitter/receiver 17.
  • the write distance expander 19a resonant circuit 80 has a high quality factor to achieve a radio frequency voltage amplitude of at least about 1 to 2 volts at the desired maximum reading distance between the transponder 15 and communication processor 11.
  • communication processor 11 transmits a challenge to transponder 15 and the distance between the two devices is too great, the low frequency transmitter/receiver 17 will not function properly because the challenge is not received or the signal is too weak.
  • the write distance expander 19a circuit has a threshold detector 85 which detects the radio frequency voltage increase during the charge phase, the period in which the radio frequency signal from communication processor 11 is used to charge charge capacitor 84.
  • the threshold detector 85 activates the supply voltage for the active devices and turns on the controller within the radio frequency transmitter 16.
  • the threshold detector 85 may be an N-channel FET with low gate source-voltage, a circuit that does not consume power as long as the FET is not in the conductive state.
  • the threshold detector 85 can also be an active device which consumes a certain amount of standby current from the battery.
  • the pulses of the PET, or of the active device can be used to trigger a retriggerable monoflop or can be used directly to turn on the controller within radio frequency transmitter 16 which activates the power supply to the write distance expander 19a.
  • the oscillation of the write distance expander is rectified by diode 83 and filtered by charge capacitor 84 to provide a reference voltage for the comparators, clock regenerator 86 and end of burst detector 88.
  • the radio frequency signal is pulsed and the length of the pulse pauses are the indication for a low or a high bit.
  • the envelope rectifier 87 detects the pulse pauses by rectifying the output of the clock regenerator 86.
  • the envelope rectifier 87 output signal is compared to the voltage reference level by the end of burst detector 88 and this signal is conducted to the controller of radio frequency transmitter 16.
  • the controller monitors the output from end of burst detector 88, detects the length of the pulse pauses and determines whether a low bit or a high bit is received.
  • Threshold detector 85, envelope rectifier 87 and comparator 88 may be combined in the simplest case using a field effect transistor (FET) with low gate/source voltage as shown in FIG. 8, an illustration of a simple write distance expander.
  • FET field effect transistor
  • the controller of radio frequency transmitter 16 switches the voltage provided by battery 90 to the clock regenerator 86 when the response from the low frequency transmitter/receiver 17 is expected and clock regenerator 86 amplifies and limits the radio frequency signal oscillation and generates a digital clock signal.
  • This clock signal is conducted directly to the controller of radio frequency transmitter 16 or to the controller through a digital or analog demodulator circuit 91 if the controller is not capable of demodulating the signal.
  • the controller checks the frequency shift keying (FSK) modulated response from the low frequency transmitter/receiver 17 to determine whether it is valid and complete.
  • the encrypted response to the challenge from the communication processor 11 is transmitted by the low frequency transmitter/receiver 17 and the response, the signature, status and other desired information, may be sent in parallel by the radio frequency transmitter 16 to confirm and authenticate the response.
  • the controller transfers the challenge stored in memory to the low frequency transmitter/receiver 17 using the 134.2 kilohertz (134.2 kHz) clock generator 89 which may be a pluck logic circuit or a gated oscillator with divider as shown in the demodulator circuit 91.
  • low frequency transmitter/receiver 17 When low frequency transmitter/receiver 17 receives the challenge, it will generate an encrypted signature from the challenge and will transmit the encrypted signature at a frequency of 134.2 kilohertz (134.2 kHz) as the response to communication processor 11. This response will also be transferred to radio frequency transmitter 16 and will be transmitted at a radio frequency of 433 megahertz (433 MHz) to communication processor 11 in parallel with the low frequency transmission of the response.
  • the radio frequency voltage limiter circuit 82 necessary to protect the components can be used to charge battery 90. If the threshold detector 85, and the controller of radio frequency transmitter 16, detects a continuous radio frequency signal for a long period of time, then radio frequency voltage limiter 82 will switch the voltage to a higher level for use to charge battery 90.
  • transponder 15 and communication processor 11 can be bridged for remote keyless entry communications.
  • This greater or expanded signal reception distance combined with the greater transmission distance for radio frequency remote control transmitter 16, greater than 10 meters (>10 m) allows the operator to gain access to the vehicle or authorize other vehicle actions from a greater distance or without removing the transponder 15 from the pocket.
  • write distance expander 19a may also be used as a low cost radio frequency module with receive and transmit capabilities. Such modules could be used in transponders useful over short distances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Near-Field Transmission Systems (AREA)

Claims (13)

  1. Système sécurisé (10) d'entrée sans clé dans un véhicule routier, comprenant un processeur de communication (11) situé dans le véhicule et un transpondeur distant (15), le processeur de communication (11) et le transpondeur (15) communiquant selon des trajets parallèles, un premier trajet étant une transmission à fréquence radio s'étendant du transpondeur (15) au processeur de communication (11) et un second trajet étant une transmission bidirectionnelle cryptée à basse fréquence entre le transpondeur (15) et le processeur de communication (11), les premier et second trajets étant tous deux utilisés pour l'établissement d'une communication entre le processeur de communication (11) situé dans le véhicule et le transpondeur (15) en réponse à un stimulus manuel envoyé au transpondeur distant (15).
  2. Système sécurisé (10) d'entrée sans clé dans un véhicule routier selon la revendication 1, dans lequel la transmission à fréquence radio et la transmission à basse fréquence sont comparées pour une authentification des données transmises.
  3. Système sécurisé (10) d'entrée sans clé dans un véhicule routier selon la revendication 1, dans lequel la transmission à fréquence radio est une transmission bidirectionnelle entre le transpondeur (15) et le processeur de communication (11).
  4. Système sécurisé (10) d'entrée sans clé dans un véhicule routier selon la revendication 1, comprenant en outre : le processeur de communication (11) possédant un récepteur à fréquence radio (12), un émetteur/récepteur à basse fréquence (13) et un contrôleur (14) apte à lire les signaux émis et reçus par l'émetteur-récepteur à basse fréquence (13); et
       le transpondeur (15) possédant un émetteur à fréquence radio (16) pour émettre un signal en direction du récepteur à fréquence radio (12) et du processeur de communication (11) lors de la réception d'un stimulus manuel, et un émetteur-récepteur à basse fréquence (17) pouvant lire des signaux reçus de la part du processeur de communication (11) et émettre une réponse cryptée au processeur de communication (11).
  5. Système (10) d'entrée sans clé dans un véhicule routier selon la revendication 4, dans lequel le transpondeur (15) inclut en outre un circuit d'interface et une bobine de couplage pour établir un transfert sans contact de données entre l'émetteur à fréquence radio et l'émetteur-récepteur à basse fréquence.
  6. Système (10) d'entrée sans clé dans un véhicule routier selon la revendication 4 ou la revendication 5, dans lequel l'émetteur à fréquence radio (16) du transpondeur (15) et le récepteur à fréquence radio (12) du processeur de communication (11) émettent et reçoivent un signal possédant une fréquence de 433 mégahertz.
  7. Système (10) d'entrée sans clé dans un véhicule routier selon l'une quelconque des revendications 4 à 6, dans lequel les émetteurs/récepteurs à basse fréquence (17) du transpondeur (15) et du processeur de communication (11) émettent et reçoivent un signal possédant une fréquence de 134,2 kilohertz.
  8. Système (10) d'entrée sans clé dans un véhicule routier selon la revendication 5, dans lequel le stimulus manuel est l'actionnement manuel de l'un d'une pluralité de boutons-poussoirs (18).
  9. Système (10) d'entrée sans clé dans un véhicule routier selon l'une quelconque des revendications 4 à 8, dans lequel le récepteur de fréquences radio (12) du processeur de communication et l'émetteur à fréquence radio (16) du transpondeur sont des émetteurs/récepteurs de fréquences radio aptes à réaliser des transmissions bidirectionnelles entre le processeur de communication (11) et le transpondeur (15).
  10. Système (10) d'entrée sans clé dans un véhicule routier selon l'une quelconque des revendications 4 à 9, dans lequel le transpondeur (15) complète ou remplace la clé de la portière du véhicule et la clé de contact, des signaux provenant du transpondeur (15) étant reçus par le processeur de communication (11) qui, après réception et vérification de codes d'accès, autorise le déverrouillage du véhicule et l'exécution de fonctions d'initialisation associées au véhicule, comme par exemple des ajustement du siège, de la courroie de siège et de rétroviseurs du véhicule.
  11. Système (10) d'entrée sans clé dans un véhicule routier selon l'une quelconque des revendications 5 à 9, dans lequel l'émetteur à fréquence radio (16) du transpondeur et l'émetteur-récepteur à basse fréquence (17) sont situés dans des boítiers séparés.
  12. Procédé d'entrée sans clé dans un véhicule comprenant les étapes consistant à :
    prévoir un processeur de communication (11) situé dans le véhicule et un transpondeur miniaturisé (15) situé à distance, le processeur de communication (11) possédant un récepteur à fréquence radio (12), un émetteur/récepteur à basse fréquence (13) pour transmettre les signaux à basse fréquence et un contrôleur (14) pour lire les signaux émis et reçus par l'émetteur/le récepteur à basse fréquence (13) et le transpondeur (15) comportant un émetteur à fréquence radio (16) qui transmet un signal au processeur de communication (11) lors de la réception d'un stimulus manuel dans ce dernier, et un émetteur/récepteur à basse fréquence (17) pour lire des signaux à basse fréquence reçus depuis le processeur de communication (11) et transmettant une réponse cryptée au processeur de communication (11);
    produire ledit stimulus manuel pour amener ledit transpondeur (15) à émettre un signal RF en direction dudit processeur de communication (11) et envoyer un signal à basse fréquence audit émetteur/récepteur à basse fréquence (13) dans ledit processeur de communication (11) en réponse audit stimulus manuel;
    puis envoyer un signal à basse fréquence depuis ledit émetteur/récepteur à basse fréquence (13) dans ledit processeur de communication (11) audit émetteur/récepteur (17) dans ledit transpondeur (15) en réponse à au moins l'un desdits signaux transmis dudit transpondeur (15) audit processeur de communication (11), puis envoyer un signal dudit transpondeur (15) audit processeur de communication (11) en réponse audit signal envoyé par ledit processeur de communication (11 ) audit transpondeur (15).
  13. Procédé selon la revendication 12, selon lequel ledit signal provenant dudit émetteur/récepteur à basse fréquence (13) dans ledit processeur de communication (11) et aboutissant audit émetteur/récepteur à basse fréquence (17) dans ledit transpondeur (15) est un signal codé.
EP97117590A 1996-10-10 1997-10-10 Système télécommandé d'entrée sans clé Expired - Lifetime EP0848123B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US728844 1996-10-10
US08/728,844 US6323566B1 (en) 1996-10-10 1996-10-10 Transponder for remote keyless entry systems
JP31576697A JPH11177464A (ja) 1996-10-10 1997-10-13 遠隔無鍵乗車システム用トランスポンダ

Publications (3)

Publication Number Publication Date
EP0848123A2 EP0848123A2 (fr) 1998-06-17
EP0848123A3 EP0848123A3 (fr) 2000-11-02
EP0848123B1 true EP0848123B1 (fr) 2004-12-08

Family

ID=26568419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97117590A Expired - Lifetime EP0848123B1 (fr) 1996-10-10 1997-10-10 Système télécommandé d'entrée sans clé

Country Status (2)

Country Link
EP (1) EP0848123B1 (fr)
JP (1) JPH11177464A (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19827586B4 (de) * 1998-06-20 2007-09-20 Leopold Kostal Gmbh & Co. Kg Schlüssellose Zugangskontrolleinrichtung für Kraftfahrzeuge sowie Verfahren zum Durchführen einer schlüssellosen Zugangsberechtigungskontrolle bei Kraftfahrzeugen
DE19832204B4 (de) * 1998-07-17 2012-09-13 Leopold Kostal Gmbh & Co. Kg Verfahren zum Durchführen einer schlüssellosen Zugangsberechtigungskontrolle bei einem Kraftfahrzeug
DE19839349C1 (de) * 1998-08-28 2000-04-13 Daimler Chrysler Ag Wegfahrsperreinrichtung für ein Kraftfahrzeug
DE19839478A1 (de) * 1998-08-29 2000-03-09 Bosch Gmbh Robert Zugangs- und Start/Fahrberechtigungssystem für ein Kraftfahrzeug
DE59906447D1 (de) 1998-09-01 2003-09-04 Kostal Leopold Gmbh & Co Kg Verfahren zum durchführen einer schlüssellosen zugangsberechtigungskontrolle sowie schlüssellose zugangsberechtigungskontrolleinrichtung
DE19850792A1 (de) * 1998-11-04 2000-05-11 Opel Adam Ag Benutzeridentifikationsvorrichtung
EP1006248B1 (fr) 1998-12-04 2003-10-22 Siemens Aktiengesellschaft Dispositif de contrôle d'accès commandé à distance, en particulier pour un véhicule à moteur et transpondeur portable associé
DK199900474A (da) * 1999-04-12 2000-10-13 Stroebech Kristian Dogel Elektronisk låsemekanisme
DE19949970A1 (de) * 1999-10-16 2001-04-19 Volkswagen Ag Verfahren und Vorrichtung zur Zugangskontrolle zu einem gesicherten Ort, insbesondere einem Kraftfahrzeug
DE19957536C2 (de) 1999-11-30 2003-04-03 Siemens Ag Diebstahlschutzsystem für ein Kraftfahrzeug und Verfahren zum Betreiben eines Diebstahlschutzsystems
DE10005444C2 (de) 2000-02-08 2002-05-02 Siemens Ag Verfahren zum Betreiben eines Diebstahlschutzsystems für ein Kraftfahrzeug und Diebstahlschutzsystem
US6801134B1 (en) * 2000-03-02 2004-10-05 Trw Inc. System and method for automatic function operation with controlled distance communication having vehicle-based frequency selection
WO2001066886A1 (fr) * 2000-03-09 2001-09-13 Siemens Aktiengesellschaft Procede d'emission et de reception, en particulier pour la detection d'un indicateur d'identite
JP2004513271A (ja) * 2000-10-20 2004-04-30 ブルー　ソルテック　カンパニー　リミティッド 無線通信を利用したドア制御システム及び屋内家電制御システム
DE10060431A1 (de) * 2000-12-05 2002-06-20 Delphi Tech Inc Anordnung für ein Fernbedienungssystem an Kraftfahrzeugen
DE10106736B4 (de) * 2001-02-14 2006-11-09 Atmel Germany Gmbh Verfahren zur Erkennung einer Weiterleitung bei einer bidirektionalen, kontaktlosen Datenübertragung
DE10113072C5 (de) * 2001-03-15 2011-05-26 Stobbe, Anatoli, Dipl.-Ing. System zur Lagerung und Ausgabe von Objekten
US20020149469A1 (en) * 2001-04-12 2002-10-17 Siemens Vdo Automotive Corporation Single point failure avoidance for a keyless passive entry and immobilizer system
FR2824943B1 (fr) 2001-05-21 2006-03-10 Siemens Automotive Sa Procede de communication entre un badge et un vehicule automobile
DE10151034B4 (de) 2001-10-16 2004-02-05 Siemens Ag Diebstahlschutzsystem, Verfahren zum Betreiben eines Diebstahlschutzsystems und Komponenten eines Diebstahlschutzsystems
FR2836270B1 (fr) * 2002-02-19 2006-12-29 Cogelec Telecommande destinee a communiquer avec une centrale d'acces, systeme de controle d'acces et procede de configuration de cette telecommande
DE10246060B4 (de) * 2002-10-02 2012-06-28 Robert Bosch Gmbh Vorrichtung zur sicheren Signalerzeugung
DE10254203B8 (de) * 2002-11-20 2004-08-12 Siemens Ag Vorrichtung für den Insassenschutz in einem Kraftfahrzeug und zur Diebstahlsicherung des Kraftfahrzeuges
DE10309600A1 (de) * 2003-03-05 2004-09-16 Delphi Technologies, Inc., Troy Sicherungssystem
DE10359701A1 (de) * 2003-12-18 2005-07-14 Volkswagen Ag Funkantenne
DE102004039835B3 (de) * 2004-08-17 2006-04-13 Siemens Ag Elektronisches Zugangsberechtigungssystem
KR101177958B1 (ko) 2005-01-12 2012-08-28 브리티쉬 텔리커뮤니케이션즈 파블릭 리미티드 캄퍼니 Ｒｆｉｄ 태그 보안 시스템 및 그 방법
JP5080275B2 (ja) 2005-01-12 2012-11-21 ブリティッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー 無線周波数識別タグセキュリティシステム
US7683756B2 (en) 2007-03-30 2010-03-23 Lear Corporation Wireless access system and method
WO2014057312A1 (fr) * 2012-10-11 2014-04-17 Burtsev Dmitry U Dualkey-s

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4329697C2 (de) * 1993-09-02 1995-10-05 Siemens Ag Fernsteuerbare Zugangskontrolleinrichtung
DE4409559C2 (de) * 1993-11-26 2001-06-07 Marquardt Gmbh Schlüssel für Schließsystem
EP0659963A1 (fr) * 1993-12-20 1995-06-28 Siemens Aktiengesellschaft Dispositif électronique d'immobilisation pour un véhicule à moteur
DE4422906C2 (de) * 1994-06-30 1996-12-05 Telefunken Microelectron Verfahren zum Betrieb eines Schließsystems für verschließbare Gegenstände
JPH10511441A (ja) * 1994-12-21 1998-11-04 ユナイテッド テクノロジーズ オートモーティブ，インコーポレイテッド ドライブアウエイ防止用ｒｆ遠隔システム
EP0767286A3 (fr) * 1995-10-02 1998-10-14 Motorola, Inc. Système télécommandé d'entrée sans clé et d'immobilisation pour véhicules automobiles

Also Published As

Publication number Publication date
EP0848123A3 (fr) 2000-11-02
JPH11177464A (ja) 1999-07-02
EP0848123A2 (fr) 1998-06-17

Similar Documents

Publication Publication Date Title
US6323566B1 (en) Transponder for remote keyless entry systems
EP0848123B1 (fr) Système télécommandé d'entrée sans clé
US6965295B2 (en) Electronic key system operable with charge capacitor power
US5736935A (en) Keyless vehicle entry and engine starting system
US5552641A (en) Remote-control access control device and method for operating the same
US7902960B2 (en) Door lock mechanism controller and method of controlling door lock mechanism
US6218929B1 (en) Door entry control by wireless communication
US6963794B2 (en) Locking system for a motor vehicle
EP0767286A2 (fr) Système télécommandé d'entrée sans clé et d'immobilisation pour véhicules automobiles
US10931150B2 (en) Ambient RF backscatter communication for vehicle remote control and sensing
JPH1046891A (ja) 低電力消費の携帯用送受信機を用いた無鍵乗車システム
EP1134134A2 (fr) Système de sécurité permettant l'accès authentifié d'un individu à une enceinte protégée
JPH10266651A (ja) キーエントリーシステム
JP2000185627A (ja) 自動車におけるユ―ザ―識別装置
JP3672963B2 (ja) 送受信システム
JP2002054331A (ja) 制御装置
US9126564B2 (en) Communication apparatus for vehicle
JP4923626B2 (ja) 車両用無線通信システム及び無線通信方法
EP1969566B1 (fr) Procédé d entrée passive sans clé pour véhicule à moteur, en particulier pour véhicule industriel
KR20100079606A (ko) 스마트키 시스템
US20020149469A1 (en) Single point failure avoidance for a keyless passive entry and immobilizer system
JP3812291B2 (ja) 移動体用機器遠隔制御装置及び移動体用携帯機
JP2005320708A (ja) 電子キーシステム、電子キー及び発信機
JP2000103316A (ja) 車載機器遠隔制御装置
JP2000233719A (ja) 車両の盗難防止装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RIC1 Information provided on ipc code assigned before grant

Free format text: 7E 05B 49/00 A, 7B 60R 25/04 B

17P Request for examination filed

Effective date: 20010427

AKX Designation fees paid

Free format text: DE FR GB IT NL SE

17Q First examination report despatched

Effective date: 20030513

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041208

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20041208

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69731875

Country of ref document: DE

Date of ref document: 20050113

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050308

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20050909

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20120925

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20121031

Year of fee payment: 16

Ref country code: FR

Payment date: 20121010

Year of fee payment: 16

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20131010

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69731875

Country of ref document: DE

Effective date: 20140501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131010

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140501

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131031