EP4371094A1 - Procédé d'évaluation d'une distance courante entre un véhicule automobile et un dispositif d'identification électronique mobile - Google Patents

Procédé d'évaluation d'une distance courante entre un véhicule automobile et un dispositif d'identification électronique mobile

Info

Publication number
EP4371094A1
EP4371094A1 EP22732190.8A EP22732190A EP4371094A1 EP 4371094 A1 EP4371094 A1 EP 4371094A1 EP 22732190 A EP22732190 A EP 22732190A EP 4371094 A1 EP4371094 A1 EP 4371094A1
Authority
EP
European Patent Office
Prior art keywords
motor vehicle
transmitter
signal
communication link
transmitting
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.)
Pending
Application number
EP22732190.8A
Other languages
German (de)
English (en)
Inventor
Konrad Betz
Matthias Reinhardt
Özgür Mutlu
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.)
Mercedes Benz Group AG
Original Assignee
Mercedes Benz Group 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 Mercedes Benz Group AG filed Critical Mercedes Benz Group AG
Publication of EP4371094A1 publication Critical patent/EP4371094A1/fr
Pending 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
    • G07C9/00309—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • 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
    • 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
    • G07C2209/64—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle using a proximity sensor

Definitions

  • the invention relates to a method for determining a current distance between a motor vehicle and a mobile electronic ID transmitter and an arrangement with a motor vehicle and with an ID transmitter that is set up/programmed to carry out this method.
  • Mobile electronic ID transmitters are used to enable authorization for access to a motor vehicle as an alternative to mechanical keys.
  • radio systems in the low-frequency range are used to communicate between the identification transmitter and the motor vehicle. This allows authentication data to be transmitted wirelessly and, in particular, access authorizations to be checked.
  • UWB Ultra-Wide-Band
  • UWB twist also makes it possible to determine an instantaneous distance between the identification transmitter and the motor vehicle with relatively high accuracy.
  • the disadvantage here is that to determine the distance, data relating to the signal propagation times of the UWB signals—typically in the form of so-called time stamps that characterize the sending and receiving time of the respective UWB signal—must be transmitted from the ID transmitter to the motor vehicle.
  • the basic idea of the invention is therefore, for the above-mentioned authorization and distance determination - as known from conventional methods - to carry out signal propagation time measurements via a UWB connection between the motor vehicle and ID transmitter and the times required for this - also known to those skilled in the art as "time stamps" - in to store identifiers.
  • a data packet containing the time stamp is not transmitted to the motor vehicle via the UWB connection but via an additionally available BLE connection after said signals for determining the transit time have been transmitted via the UWB connection. Since such a BLE connection is not subject to the above restrictions of the UWB connection in terms of link budget and transmission power, said time stamp can also be used in the form of a relatively large data packet securely and completely by the Transfer ID transmitter to the motor vehicle and evaluated there to determine the distance. In this way, a reliable and highly accurate determination of the distance between the ID transmitter and the motor vehicle is possible.
  • the method according to the invention serves to determine the distance of a mobile electronic identification transmitter relative to a motor vehicle, which can be unlocked using this identification transmitter.
  • the identifier communicates with the motor vehicle both via a first wireless communication link that works with the UWB standard and by means of a second wireless communication link that works with the BLE standard, in a data-transmitting manner.
  • a maximum range of the first communication link is preferably less than a maximum range of the second communication link.
  • the method according to the invention comprises three measures a), b) and c).
  • measure a at least one signal is transmitted from the motor vehicle via the first communication link to the identification transmitter, which signal contains the time at which this signal was sent.
  • the identification transmitter which signal contains the time at which this signal was sent.
  • several such signals can be transmitted successively.
  • the respective transmission and reception times of the signal received from the identification transmitter or of the signals received by the identification transmitter are stored in the identification transmitter.
  • a data packet is transmitted from the ID transmitter to the motor vehicle via the second communication link, which contains the stored transmission and reception times of the signal transmitted in measure a) or of the signals transmitted in measure a).
  • This information can later be used to calculate the distance between the ID transmitter and the motor vehicle at the time the signal is transmitted. In principle, this is done by forming the difference between the time of receipt and the time of sending. This difference corresponds to the time required for the transmission of the signal.
  • the distance of the identification transmitter from the motor vehicle at the time of the signal transmission can in turn be calculated in a simple manner from this period of time.
  • the method according to the invention comprises an additional measure d) following measure c), according to which a current distance is determined from the data packet transmitted to the motor vehicle in measure c). of the identification transmitter for the motor vehicle is determined.
  • the distance between the identification transmitter and the motor vehicle can thus be determined with very high accuracy using the method according to the invention.
  • a “polling” method can be used to carry out measures a) and b). Signal propagation times of signals transmitted between the identification transmitter and the motor vehicle via the first communication connection can be determined in a simple manner by means of such a polling method. These signal propagation times can in turn be used for later determination of the distance between the identification transmitter and the motor vehicle.
  • a polling signal can be sent to the motor vehicle from the identification transmitter via the first communication connection in a particularly expedient manner.
  • the motor vehicle transmits at least one response signal, also via the first communication link, to the identification transmitter at the time at which this response signal was sent.
  • the reception time at which the response signal is received can be stored by the identification transmitter. Both points in time—that is, the sending point in time and the receiving point in time—can thus be added to the data packet to be transmitted to the motor vehicle.
  • the data packet to be transmitted from the identification transmitter to the motor vehicle by means of the second communication link thus contains the time of sending and a time of receipt of the response signal.
  • two or more response signals are particularly preferably transmitted in succession to the identification transmitter in response to the polling signal via the first communication link in measure b).
  • a respective transmission time and a respective reception time of the response signal are added to the data packet to be transmitted from the ID transmitter to the motor vehicle via the second communication connection for each response signal.
  • the sending time and the receiving time of the polling signal can also be added to the data packet.
  • the signal propagation time of the polling signal can also be used for later distance calculation. In this way, the accuracy with which the distance between the ID transmitter and the motor vehicle can be determined is further increased.
  • the transmission of the data packet carried out in measure c) via the second communication connection can preferably take place in encrypted form.
  • Safety-critical authorization data which are used to authorize access to the motor vehicle, can thus also be added to this data packet.
  • the invention also relates to an arrangement with a motor vehicle and with a mobile electronic ID transmitter, which can communicate or communicates with the motor vehicle by means of a first wireless communication link according to the UWB standard and by means of a second wireless communication link according to the BLE standard.
  • the motor vehicle comprises a transmission and reception system for wireless data transmission with the identification transmitter via the two communication links, the transmission and reception system being set up/programmed to carry out the method according to the invention.
  • the sending and receiving system comprises a first sending and receiving device for sending and receiving data via the first communication link and a second sending and receiving device for sending and receiving data via the second communication link.
  • the first transmitting and receiving device and the second transmitting and receiving device are connected to one another in a data-transmittable manner via a suitable—preferably wired—communication connection, so that the signal propagation time received by the second transmitting and receiving device is Further processing can be transmitted to the first transmitting and receiving device.
  • the electronic identification transmitter is part of a smartphone or is formed by a smartphone.
  • transmitter and receiver units based on both the UWB and the BLE standard are often installed as standard.
  • FIG. 1 illustrates an example of an arrangement 20 according to the invention in a plan view.
  • the arrangement 20 comprises a motor vehicle 1 with vehicle doors 4, via which access to a vehicle interior of the motor vehicle 1 is possible.
  • the motor vehicle 1 includes a transmission and reception system 10 for wireless data transmission, which is set up/programmed to carry out the method according to the invention.
  • the transmission and reception system 10 for wireless data transmission can be a control device which is connected to a fieldbus present in the motor vehicle 1, for example a LIN or CAN bus.
  • the arrangement 20 also includes a mobile electronic identification transmitter 2.
  • the electronic identifier 2 can be part of a smartphone 11 or can be formed by a smartphone 11 .
  • the ID transmitter 2 enables automatic authorization of access to the motor vehicle 1 when the ID transmitter 2 approaches the motor vehicle 1. In particular, the vehicle doors 4 can be unlocked after authorization has taken place.
  • the mobile ID transmitter 2 can communicate with the transmission and reception system 10 of the motor vehicle 1 by means of a first wireless communication link 3a according to the UWB standard and by means of a second wireless communication link 3b according to the BLE standard.
  • a first transmitting and receiving device 6a can be provided in motor vehicle 1 as part of transmitting and receiving system 10, which can transmit data via first communication link 3a with a corresponding first transmitting and receiving device 7a present in ID transmitter 2.
  • a second transmitting and receiving device 6b can be provided in the motor vehicle 1, which can communicate via the second communication connection 3b with a corresponding second transmitting and receiving device 7b present in the ID transmitter 2 in a data-transmitting manner.
  • a first maximum range, measured from motor vehicle 1, of the first communication link 3a from motor vehicle 1 to ID transmitter 2 is, in the example, less than a second maximum range, also measured from motor vehicle 1, of the second communication link 3b.
  • the first transmitting and receiving device 6a and the second transmitting and receiving device 6b of the motor vehicle 1 can be connected to one another in a data-transmittable manner via a wired communication link 8 .
  • the procedure comprises three measures a), b) and c).
  • measure a several signals S are successively transmitted from the motor vehicle 1 via the first communication connection 3a to the identification transmitter 2, in which the transmission time of the respective signal S is contained.
  • a data packet D is transmitted from the identification transmitter 2 to the motor vehicle 1 by means of the second communication connection 3b.
  • a so-called "polling" procedure can be used to carry out measures a) and b).
  • a polling signal PS is transmitted from the first transmitting and receiving device 7a of the identification transmitter 2 to the first transmitting and receiving unit 6a of the motor vehicle 1 via the first communication link 3a.
  • the first transmitting and receiving unit 6a of the motor vehicle 2 - also via the first communication link 3a - successively sends several response signals AS to the first transmitting and receiving unit 7a of the identification transmitter 2 with a sending time stamp of the respective response signal AS transmitted.
  • the data packet D to be transmitted from the second transmitting and receiving unit 7b of the identification transmitter 2 via the second communication connection 3b to the second transmitting and receiving unit 6b of the motor vehicle 1 is assigned a respective sending time and a respective receiving time for each response signal AS. Added time of response signal AS.
  • the associated transmission time and the associated reception time included.
  • motor vehicle 1 calculates a current distance between identification transmitter 2 and motor vehicle 1 from data packet D transmitted to motor vehicle 1 in measure c) and containing the sending and receiving times. This calculation can take place in the first transmission and reception unit 6a.
  • the data packet D received by the second transmitting and receiving unit 6b of the transmitting and receiving system 10 of the motor vehicle 1 can be transmitted via the wired communication link 8 to the first transmitting and receiving device 6a of the transmitting and receiving system 10 and used there to calculate the distance sought be further processed between ID transmitter 2 and motor vehicle 1.
  • the transmission of the data packet D carried out in measure c) via the second communication link 3b can be encrypted.
  • D safety-critical authorization data can also be added to the data packet, which are used to authorize access to the motor vehicle 1 by the ID transmitter 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de détermination de la position d'un dispositif d'identification électronique mobile par rapport à un véhicule automobile (1) qui peut être déverrouillé par le dispositif d'identification (2). Le dispositif d'identification (2) peut communiquer avec le véhicule automobile (1) de manière à transmettre des données par l'intermédiaire d'une première connexion de communication sans fil (3a), qui fonctionne conformément à la norme UWB, ainsi que d'une seconde connexion de communication sans fil (3b), qui fonctionne conformément à la norme BLE. La portée maximale de la première connexion de communication est plus courte que la portée maximale de la seconde connexion de communication. Le procédé comprend les étapes suivantes consistant à : a) transmettre au moins un signal (S), de préférence transmettre successivement de multiples signaux (S), du véhicule automobile (1) à un dispositif d'identification (2) par l'intermédiaire de la première connexion de communication (3a), ledit signal contenant le temps de transmission dudit signal (S), b) mémoriser le temps de transmission et le temps de réception dudit signal (S) reçu par le dispositif d'identification (2) dans le dispositif d'identification (2), et c) transmettre un paquet de données (D) du dispositif d'identification (2) au véhicule automobile (1) par l'intermédiaire de la seconde connexion de communication (3b), ledit paquet de données contenant les temps de transmission et de réception mémorisés des signaux (S) transmis à l'étape a).
EP22732190.8A 2021-07-13 2022-06-08 Procédé d'évaluation d'une distance courante entre un véhicule automobile et un dispositif d'identification électronique mobile Pending EP4371094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021003617.4A DE102021003617A1 (de) 2021-07-13 2021-07-13 Verfahren zum Ermitteln eines momentanen Abstands zwischen einem Kraftfahrzeug und einem mobilen elektronischen Identifikationsgeber
PCT/EP2022/065535 WO2023285035A1 (fr) 2021-07-13 2022-06-08 Procédé d'évaluation d'une distance courante entre un véhicule automobile et un dispositif d'identification électronique mobile

Publications (1)

Publication Number Publication Date
EP4371094A1 true EP4371094A1 (fr) 2024-05-22

Family

ID=82117691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22732190.8A Pending EP4371094A1 (fr) 2021-07-13 2022-06-08 Procédé d'évaluation d'une distance courante entre un véhicule automobile et un dispositif d'identification électronique mobile

Country Status (5)

Country Link
EP (1) EP4371094A1 (fr)
KR (1) KR20240017025A (fr)
CN (1) CN117581277A (fr)
DE (1) DE102021003617A1 (fr)
WO (1) WO2023285035A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10906508B2 (en) 2016-02-26 2021-02-02 Huf Hülsbeck & Fürst Gmbh & Co. Kg Method for activating at least one security function of a security system of a vehicle
DE102017210523B3 (de) 2017-06-22 2018-07-26 Volkswagen Aktiengesellschaft Verfahren zum Betreiben einer passiven funkbasierten Schließvorrichtung und passive funkbasierte Schließvorrichtung
US10486646B2 (en) * 2017-09-29 2019-11-26 Apple Inc. Mobile device for communicating and ranging with access control system for automatic functionality
DE102017222824A1 (de) 2017-12-15 2019-06-19 Robert Bosch Gmbh Verfahren zur Überprüfung einer Berechtigung zu einem Zugriff auf eine Fahrzeugfunktion

Also Published As

Publication number Publication date
DE102021003617A1 (de) 2023-01-19
KR20240017025A (ko) 2024-02-06
CN117581277A (zh) 2024-02-20
WO2023285035A1 (fr) 2023-01-19

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