EP0523117A1 - Installation de verrouillage centralise pour vehicules a moteur. - Google Patents

Installation de verrouillage centralise pour vehicules a moteur.

Info

Publication number
EP0523117A1
EP0523117A1 EP91907011A EP91907011A EP0523117A1 EP 0523117 A1 EP0523117 A1 EP 0523117A1 EP 91907011 A EP91907011 A EP 91907011A EP 91907011 A EP91907011 A EP 91907011A EP 0523117 A1 EP0523117 A1 EP 0523117A1
Authority
EP
European Patent Office
Prior art keywords
transmitter
receiver
central locking
locking system
word
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
EP91907011A
Other languages
German (de)
English (en)
Other versions
EP0523117B1 (fr
Inventor
Berthold Wolfram
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.)
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8203863&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0523117(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0523117A1 publication Critical patent/EP0523117A1/fr
Application granted granted Critical
Publication of EP0523117B1 publication Critical patent/EP0523117B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G07C9/00182—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
    • 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
    • G07C2009/00238—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 the transmittted data signal containing a code which is changed
    • G07C2009/00253—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 the transmittted data signal containing a code which is changed dynamically, e.g. variable code - 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
    • 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

Definitions

  • the invention relates to a central locking system for a motor vehicle with a control and a remote control device, which is provided with at least one transmitter operating as a key and a receiver operating as a lock, according to the preamble of claim 1.
  • Such a central locking system is known from German Patent 32 44 049.
  • a number of defined, different code words are stored in the transmitter and in the receiver (code word supply), which in turn are arranged in a sequence.
  • the transmitter transmits one of these code words and does this sequentially, starting with the first code word.
  • a decoding device in the receiver accordingly converts a received codeword into an unlocking signal and feeds it to the controller.
  • the code word is exhausted, the first code word is started cyclically.
  • the decoding device for processing these code words is equipped with several decoding channels corresponding to the number of transmitters.
  • both the transmitter identification and the number of decoding channels and thus the number of transmitters used in the central locking system must be known beforehand. This data must have been set at the factory, for example by programming. The user is therefore fixed from the outset to a predetermined number of keys.
  • the invention is based on the object of modifying a central locking system of the type mentioned at the outset such that the transmitter (key) searches for its own transmitter identifier, which differs from the identifier of other transmitters, and the maximum number of authorized transmitters only from depends on the size of the send and receive memory.
  • a central locking system in which a random generator in the transmitter of the remote control device generates a transmitter identifier upon authorized initialization, which is stored in a transmitter memory, in which the transmitter identifier is transmitted together with a code word from the transmitter to the receiver and in which the receiver contains an evaluation circuit by means of which the transmitter identifier is compared with already stored transmitter identifiers during initialization and is stored as an authorized transmitter identifier in a receive memory if it has not yet been stored.
  • a central locking system is simple, inexpensive and particularly suitable for mass production.
  • Another advantage of this central locking system is that there is no dialogue between the key and the lock, i.e. there must only be one transmitting element in the key, but no receiving element. Furthermore, a register in the key can be used as a random generator. Because of the small number of required components in the key, the construction largely from useful external criteria, such as of manageability.
  • FIG. 1 shows a central locking system according to the invention for a motor vehicle with a transmitter and a receiver
  • FIG. 2 shows the transmitter and the receiver of the central locking system according to FIG. 1
  • 3 shows the structure of a signal transmitted from the transmitter to the receiver of the central locking system according to FIG. 1.
  • a motor vehicle 1 (FIG. 1) has a central locking system which is actuated by a transmitter 2.
  • a signal 3 is sent to the receiver 4.
  • the receiver 4 can be outside the motor vehicle 1, e.g. on a vehicle door, or in the motor vehicle, e.g. on the rearview mirror.
  • the transmitter 2 and the receiver 4 In order to adapt a transmitter 2 to a central locking system, the transmitter 2 and the receiver 4 must first be brought into an initialization mode.
  • the receiver is activated by a predefined setting of an electrical consumer provided for this purpose in the motor vehicle 1, e.g. a car radio, prepared.
  • the central locking system can be initialized with reduced transmission power. Then the transmitter 2 must be held at a maximum distance of ten millimeters from the receiver 4.
  • a transmitter control element 6 (FIG. 2), here executed as a key, is then held down until a display element 9, e.g., controlled by a clock generator 7 and a counter 8, is pressed.
  • a light-emitting diode lights up for a predetermined period of time and thus specifies a cycle for the user to actuate the key to carry out an initialization.
  • a random generator 10 In a first initialization step, several random numbers are generated in a random generator 10.
  • the random generator 10 is integrated in a transmitter control circuit 11 here.
  • the control circuit 11 is designed here as a microprocessor and the random generator as a register of the microprocessor.
  • the register is incremented after application of a supply voltage. The content of the register determines the random number when a key is pressed.
  • Several random numbers become in the control circuit 11 formed a master code word (master code).
  • the original code changes a given mathematical law of education, with the aid of which a series for the code words of a code word supply (alternating code) can be calculated. This also determines the size of the code word pool.
  • a further random number is determined by the transmitter identifier 22 (cf. FIG. 3) from a number of approved transmitter identifiers.
  • the transmitter identifier 22 and the original code word are stored in a transmitter memory 12 and are transmitted wirelessly, e.g. by means of infrared radiation, to a receiving element 15 of the receiver 4.
  • the received signal 3 is evaluated in a further receiver control circuit 17 clocked by a clock generator 16, which here is designed as a microprocessor.
  • the original code word tells the receiver 4 that initialization is taking place.
  • the received transmitter identifier 22 is adopted as the transmitter identifier which will be valid in the future and is stored in a reception memory 18.
  • An acknowledgment signal is then sent via a further display element 19, e.g. an LED, output in the receiver 4.
  • a further random number is used together with the original code to calculate a start code word.
  • the start code word is used to use the education law to determine a first code word 23 (see FIG. 3) in turn from the change code, i.e. the first code word of the change code to be transmitted is specified.
  • the start code is transmitted to the receiver 4 together with the transmitter identifier and is stored in the receiver memory 18 together with the transmitter identifier.
  • the first code value 23 of the alternating code is generated in 5ender 2 with the formation law defined by the original code with the aid of the start code word. This is transmitted to the receiver 4 together with the transmitter identifier 22. There, the first code word 23 is stored together with the transmitter identifier 22 in the reception memory 18 as the start word. The start word is used with the help of the Education Act to define the code word that is expected in the receiver 4 after the transmission of a code word 23.
  • the central locking system has now been initialized to such an extent that the transmitter 2 can be used to open or close the central locking system.
  • the transmitter identifier 22 in the microprocessor of the receiver is compared with any existing identifiers of other transmitters. If the same transmitter identifier 22 has not yet been stored, it is adopted as the transmitter identifier which will be valid in the future and stored in the receiver memory 18. However, if the same transmitter identifier has already been stored by another transmitter 2 during initialization, the receiver 4 does not issue an acknowledgment signal and the initialization must be repeated.
  • the transmitter identifier 22 in the receiver 4 is checked for its authorization as the transmitter identifier of the central locking system, and if the authorization is given, the start code word is stored together with the transmitter identifier in the receive memory 18.
  • the transmitter identifier 22 is first checked in the receiver 4 and stored together with the first code word 23 of the change code after the start code word in the reception memory 18 as the start word. With this procedure, all transmitters approved for the central locking system are now initialized.
  • the start code word can be dispensed with. Only the original code word defines the first code word of the change code to be transmitted.
  • the change code word transmitted directly beforehand is changed in accordance with the specified law of education, ie the individual code words 23 are cyclically removed from the word set of the change code when a key is pressed.
  • the first code word is started again.
  • the code word 23 is transmitted to the receiver 4 together with the stored transmitter identifier 22. There it is checked whether the transmitter identifier 22 is present.
  • the start word stored under this transmitter identifier in the reception memory 18 is changed according to the same law as in the transmitter 2 and compared with the received code word 23. If the two code words match, a control pulse 20 is sent to a control of the centrally locked door locks in order to effect a closing or opening process. The received code word 23 is saved as a new start word.
  • code word 23 is only calculated in transmitter 2.
  • the receiver 4 should react to received code words 23, which in turn have already been calculated further than the code word originally expected.
  • the start word is further calculated in the receiver 4 up to a number of several subsequent code words (catch area) and in each case compared with the received code word 23. If a code word of the catch area matches the received code word 23, a control pulse 20 is then triggered.
  • the size of the catch area depends on the size of the code word supply and on security-relevant aspects.
  • the catch range is between zero and ninety-nine code words. If the received code word 23, starting from the start word, lies outside the catch range, but within an extended catch range (post-synchronization range), then a control pulse 20 is only sent to the controller sent if the code word received immediately thereafter is the code word expected according to the Education Act. In the present application example, the post-synchronization range is between a hundred and a thousand code words. If a control pulse 20 is triggered, the received code word 23 is stored as the start word together with the transmitter identifier 22 in the reception memory 18.
  • the transmitted signal 3 (FIG. 3) consists of bits of the transmitter identifier 22 and of bits of the code word 23.
  • the transmitter identifier 22 remains the same when the key is initialized and is stored in the transmitter memory 12.
  • the size of the code word stock depends on the number of bits of code word 23. In the case of a code word 23 with, for example, sixty-four bits, there is a code word stock of 2 to 64 different code words for the alternating code.
  • the code word 23 is changed after each key operation in the transmitter by the Education Act, starting from the directly preceding code word. It is stored as a start word in the receiver 4 as soon as a control pulse 20 has been triggered.
  • the master code word, the start code word or the change code word can be transmitted as code word 23.
  • the number of possible transmitter identifiers 22 is, for example, fourteen and that of the permitted keys is four.
  • the key numbers can be coded so that they differ from one another by two bits. This largely precludes the fact that, due to a bit error in the transmission of signal 3 in receiver 4, the alternating code of another key is used for the comparison.
  • the first key is initialized, the number "11", for example, is randomly generated as the key number and accepted and acknowledged by the receiver 4.
  • the initialization of the second key results in the key number "6" generated at random. This is also accepted and acknowledged.
  • the third key is initialized, the key number "11" is generated randomly. This is not accepted by the recipient 4 because it has already been assigned to another key.
  • the special coding of the key number can be dispensed with.
  • a test byte is generated in transmitter 2 and transmitted in signal 3.
  • the receiver 4 compares the received signal 3 with the signal to be expected, in which a test byte has also been generated in the receiver.
  • a change code word to be transmitted consists of three bytes with the hexadecimal numbers "03", "02" and "04".
  • the check byte is now generated by forming the checksum of the three change code bytes and results in the hexadecimal number "09”.
  • the four bytes are transmitted to the receiver 4 in the code word 23.
  • the three bytes of the expected change code word and their checksum are calculated in the receiver 4. If the alternating code bytes or the cross sum match, the received code word 23 is assumed to be valid. The comparison can thus be used to determine whether there is a transmission error.

Abstract

Une installation de verrouillage centralisé pour véhicules à moteur comprend un émetteur (2) qui sert de clé et un récepteur (4) qui sert de serrure. Lorsque l'émetteur (2) est actionné afin de fermer ou d'ouvrir les serrures des portes, un signal (3) est transmis au récepteur (4), déclenchant une impulsion de commande (3). Chaque émetteur (2) a sa propre caractéristique d'émission et un réservoir de mots de code dans lequel des mots de code sont successivement prélevés et transmis. Le récepteur (4) procède à une allocation de l'émetteur sur la base de la caractéristique d'émission. L'objet de l'invention est d'obtenir que l'émetteur (2) recherche sa propre caractéristique d'émission. A cet effet, une caractéristique d'émission est aléatoirement générée dans l'émetteur, enregistrée dans une mémoire (12) d'émission et transmise avec un mot de code. Le récepteur (4) comprend un circuit d'évaluation qui compare la caractéristique de l'émetteur avec des caractéristiques d'émission déjà mémorisées et la mémorise en tant que caractéristique admissible d'émission dans une mémoire (18) du récepteur lorsqu'elle n'est pas encore mémorisée.
EP91907011A 1990-04-06 1991-04-05 Installation de verrouillage centralise pour vehicules a moteur Expired - Lifetime EP0523117B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP90106583 1990-04-06
EP90106583 1990-04-06
PCT/EP1991/000652 WO1991015644A1 (fr) 1990-04-06 1991-04-05 Installation de verrouillage centralise pour vehicules a moteur

Publications (2)

Publication Number Publication Date
EP0523117A1 true EP0523117A1 (fr) 1993-01-20
EP0523117B1 EP0523117B1 (fr) 1994-08-24

Family

ID=8203863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91907011A Expired - Lifetime EP0523117B1 (fr) 1990-04-06 1991-04-05 Installation de verrouillage centralise pour vehicules a moteur

Country Status (6)

Country Link
US (1) US5508692A (fr)
EP (1) EP0523117B1 (fr)
JP (1) JP3145112B2 (fr)
AU (1) AU7661091A (fr)
DE (1) DE59102653D1 (fr)
WO (1) WO1991015644A1 (fr)

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Also Published As

Publication number Publication date
JP3145112B2 (ja) 2001-03-12
EP0523117B1 (fr) 1994-08-24
AU7661091A (en) 1991-10-30
WO1991015644A1 (fr) 1991-10-17
JPH05505916A (ja) 1993-08-26
US5508692A (en) 1996-04-16
DE59102653D1 (de) 1994-09-29

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