WO2021124766A1 - Système de clé électronique - Google Patents

Système de clé électronique Download PDF

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Publication number
WO2021124766A1
WO2021124766A1 PCT/JP2020/042797 JP2020042797W WO2021124766A1 WO 2021124766 A1 WO2021124766 A1 WO 2021124766A1 JP 2020042797 W JP2020042797 W JP 2020042797W WO 2021124766 A1 WO2021124766 A1 WO 2021124766A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
portable device
radio wave
electronic key
key system
Prior art date
Application number
PCT/JP2020/042797
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English (en)
Japanese (ja)
Inventor
宮澤　明
Original Assignee
アルプスアルパイン株式会社
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 アルプスアルパイン株式会社 filed Critical アルプスアルパイン株式会社
Publication of WO2021124766A1 publication Critical patent/WO2021124766A1/fr

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    • 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
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/79—Systems using random coded signals or random pulse repetition frequencies, e.g. "Separation and Control of Aircraft using Non synchronous Techniques" [SECANT]

Definitions

  • the present invention relates to an electronic key system.
  • a smart keyless entry system including an in-vehicle device installed in a vehicle and a portable device owned by a user is known.
  • the user simply possesses the portable device within the communication area of the in-vehicle device, and the portable device and the in-vehicle device perform wireless communication with each other, so that various devices mounted on the vehicle (for example, Door locks, engine starters, etc.) can be controlled (keyless control) without using a physical key.
  • Relay attack is known as a method of stealing a vehicle that employs such a smart keyless entry system.
  • Relay attack is a method in which a relay attack device relays a request signal transmitted from an in-vehicle device to a user's portable device away from the vehicle, thereby causing the portable device to transmit an answer signal and illegally keyless control the vehicle. Is.
  • the signal strength of the strength measurement signal included in the request signal transmitted from the in-vehicle device is changed on the way, and the change in the signal strength is detected in the portable device.
  • a technique for determining whether or not a relay attack has been performed is disclosed. According to this technology, the request signal relayed from the relay attack device does not reproduce the change in the signal strength of the signal for strength measurement, so that the request signal is invalid due to the relay attack in the portable device. Can be determined.
  • a portable device carried by a person having a first transmission / reception unit for transmitting / receiving a first radio wave and a control unit, and a first transmission / reception unit for transmitting / receiving the first radio wave.
  • an in-vehicle device mounted on a vehicle provided with a control unit, and a plurality of sensors attached to the vehicle for detecting an operation by the person, and the control unit of the in-vehicle device is among the plurality of sensors.
  • the vehicle-mounted device and the portable device perform transmission / reception by the first radio wave, and the distance between the vehicle-mounted device and the portable device. Is measured, an accessible area corresponding to the sensor in which the operation by the person is detected is set, and whether or not the position of the portable device based on the distance exists within the set accessible area. It is characterized by making a judgment.
  • the request signal transmitted from the in-vehicle device is relayed to the portable device of the user away from the vehicle by the relay attack device, so that the portable device transmits an answer signal and the vehicle is illegally keyless controlled. How to do it. Therefore, it takes time because the request signal transmitted from the in-vehicle device needs to be relayed to the user's portable device away from the vehicle.
  • the present invention has focused on this point and has come up with the idea of preventing a relay attack.
  • the electronic key system according to the first embodiment will be described with reference to FIGS. 1 and 2.
  • the electronic key system in the present embodiment has a plurality of sensors such as a portable device 10, an in-vehicle device 20, a first door sensor 31, a second door sensor 32, and a back door sensor 33.
  • the first door sensor 31, the second door sensor 32, the back door sensor 33, and the like are touch sensors based on a capacitance method or the like.
  • the portable device 10 is a portable device carried by a person such as a driver of a vehicle 50, and is a control unit 11, a UWB (Ultra Wide Band) transmission / reception unit 12, an antenna 13, and a BLE (Bluetooth Low Energy) (registered trademark) transmission / reception unit 14. , Antenna 15, battery 16, and the like.
  • a control unit 11 a UWB (Ultra Wide Band) transmission / reception unit 12
  • an antenna 13 and a BLE (Bluetooth Low Energy) (registered trademark) transmission / reception unit 14.
  • BLE Bluetooth Low Energy
  • the on-board unit 20 is mounted on the vehicle 50 and has a control unit 21, a UWB transmission / reception unit 22, an antenna 23, a BLE transmission / reception unit 24, an antenna 25, and the like.
  • a plurality of sensors such as the on-board unit 20, the first door sensor 31, the second door sensor 32, and the back door sensor 33 are attached to the vehicle 50.
  • the in-vehicle device 20 is mounted inside the vehicle 50
  • the first door sensor 31 is mounted on the door handle of the door on the right side of the vehicle 50
  • the second door sensor 32 is mounted on the left side of the vehicle 50.
  • the back door sensor 33 is attached to the door handle of the back door that opens and closes the trunk behind the vehicle 50.
  • the vehicle 50 is provided with an engine start unit 34 for moving the vehicle 50. Therefore, the vehicle 50 is equipped with a plurality of sensors for detecting human operation.
  • Communication using UWB radio waves between the portable device 10 and the vehicle-mounted device 20 is performed, for example, by using radio waves having a frequency of 8 GHz, the UWB transmitter / receiver 12 and the antenna 13 of the portable device 10 and the UWB transmitter / receiver 22 and the antenna 23 of the vehicle-mounted device 20. It is done using and.
  • the BLE transmission / reception section 14 and the antenna 15 of the portable device 10 and the BLE transmission / reception section 24 of the in-vehicle device 20 are transmitted by radio waves having a frequency of 2.4 GHz. This is done using the antenna 25.
  • the UWB radio wave is described as the first radio wave
  • the UWB transmission / reception unit 12 and the UWB transmission / reception unit 22 are described as the first transmission / reception unit
  • the BLE radio wave is described as the second radio wave.
  • the BLE transmission / reception unit 14 and the BLE transmission / reception unit 24 may be referred to as a second transmission / reception unit. Therefore, the frequency of the first radio wave is higher than the frequency of the second radio wave.
  • the portable device 10 possessed by the driver or the like of the vehicle 50 exists in a region having a radius of 1 m or more and less than 3 m from the in-vehicle device 20. Therefore, when the driver or the like of the vehicle 50 is detected by the first door sensor 31 of the vehicle 50, the distance between the portable device 10 and the in-vehicle device 20 is set to the antenna 13 of the UWB transmission / reception unit 12 of the portable device 10.
  • the distance between the UWB transmitter / receiver 22 of the vehicle-mounted device 20 and the antenna 23 is measured using UWB radio waves, and whether or not the portable device 10 exists in a region having a radius of 1 m or more and less than 3 m from the vehicle-mounted device 20. To judge. When the portable device 10 exists in an area having a radius of 1 m or more and less than 3 m from the vehicle-mounted device 20, the vehicle 50 controls to unlock or lock the door to which the first door sensor 31 is attached. Do.
  • the on-board unit 20 transmits the UWB radio wave toward the portable device 10, and the portable device 10 receives the UWB radio wave. Turns back and transmits the UWB radio wave toward the in-vehicle device 20.
  • the portable device 10 is based on the time that the UWB radio wave is transmitted from the portable device 10 and the time that the in-vehicle device 20 receives the UWB radio wave from the portable device 10.
  • the distance between the vehicle and the vehicle-mounted device 20 is calculated by the control unit 21 or the like. Such a distance calculation method is called a TOA (Time of Arrival) method.
  • the accessible area where the portable device 10 is considered to exist has a radius smaller than that of the vehicle-mounted device 20.
  • the portable device 10 is present in an area of 1 m or more and less than 3 m, the door to which the first door sensor 31 is attached is controlled to be unlocked or locked.
  • the position of the portable device 10 based on the distance calculated by the vehicle-mounted device 20 exists in a region having a radius of less than 1 m or a radius of 3 m or more from the vehicle-mounted device 20, or as shown in FIG.
  • the portable device 10 exists in an area having a radius of 5 m or more from the in-vehicle device 20, it is considered that the operation is performed by a person who is not the owner of the portable device 10, so that the first door sensor 31 is used. Do not unlock or lock the attached door.
  • the portable device 10 owned by the driver or the like of the vehicle 50 exists in a region having a radius of 1 m or more and less than 3 m from the in-vehicle device 20.
  • the distance between the portable device 10 and the in-vehicle device 20 is carried.
  • the distance between the antenna 13 of the UWB transmission / reception unit 12 of the machine 10 and the antenna 23 of the UWB transmission / reception unit 22 of the vehicle-mounted device 20 is measured using UWB radio waves, and the portable device 10 has a radius of 1 m or more from the vehicle-mounted device 20. It is determined whether or not it exists in an area of less than 3 m.
  • the vehicle 50 controls to unlock or lock the door to which the second door sensor 32 is attached. Do.
  • the position of the portable device 10 based on the distance calculated by the vehicle-mounted device 20 exists in a region having a radius of less than 1 m or a radius of 3 m or more from the vehicle-mounted device 20, or is shown in FIG.
  • the operation of unlocking or locking the door to which the second door sensor 32 is attached is not performed.
  • the portable device 10 owned by the driver or the like of the vehicle 50 exists in a region having a radius of 3 m or more and less than 5 m from the in-vehicle device 20. Therefore, when the driver or the like of the vehicle 50 is detected by the back door sensor 33 of the vehicle 50, the distance between the portable device 10 and the in-vehicle device 20 is determined by the antenna 13 of the UWB transmission / reception unit 12 of the portable device 10 and the in-vehicle device.
  • the distance of the UWB transmitter / receiver 22 of the machine 20 to the antenna 23 is measured using UWB radio waves, and it is determined whether or not the portable device 10 exists in a region having a radius of 3 m or more and less than 5 m from the in-vehicle device 20. To do. When the portable device 10 exists in an area having a radius of 3 m or more and less than 5 m from the in-vehicle device 20, the vehicle 50 controls to unlock or lock the back door to which the back door sensor 33 is attached. ..
  • the distance between the portable device 10 and the in-vehicle device 20 is calculated by the control unit 21 or the like, and based on the calculated distance.
  • the portable device 10 is present in an accessible area where the portable device 10 is considered to exist, for example, as shown in FIG. 6, a radius of 3 m or more and less than 5 m from the in-vehicle device 20. Controls the unlocking or locking of the back door to which the back door sensor 33 is attached.
  • the owner of the portable device 10 Since it is considered that the operation is performed by a person or the like, the operation of unlocking or locking the back door to which the back door sensor 33 is attached is not performed.
  • the portable device 10 possessed by the driver or the like of the vehicle 50 exists in a region having a radius of less than 1 m from the vehicle-mounted device 20. Therefore, since the driver or the like of the vehicle 50 operates the engine start unit 34 of the vehicle 50, when touched, the distance between the portable device 10 and the in-vehicle device 20 is determined by the antenna of the UWB transmission / reception unit 12 of the portable device 10.
  • the distance between 13 and the antenna 23 of the UWB transmitter / receiver 22 of the vehicle-mounted device 20 is measured using UWB radio waves, and it is determined whether or not the portable device 10 exists in a region having a radius of less than 1 m from the vehicle-mounted device 20. to decide.
  • the engine start unit 34 is started to control the movement of the vehicle 50.
  • the distance between the portable device 10 and the in-vehicle device 20 is calculated by the control unit 21 or the like, and based on the calculated distance, the distance is calculated.
  • the portable device 10 is present in an accessible area where the portable device 10 is considered to exist, for example, as shown in FIG. 7, a radius of less than 1 m from the in-vehicle device 20 is present.
  • the engine start unit 34 is started to control the movement of the vehicle 50.
  • the engine start unit 34 does not start.
  • step 102 the operation is detected by the sensor or the like in the vehicle 50. Specifically, it is detected that the operation has been performed by touching any of the first door sensor 31, the second door sensor 32, the back door sensor 33, and the engine start unit 34 attached to the vehicle 50.
  • step 104 the accessible area of the portable device 10 is set corresponding to the detected sensor. Specifically, in step 102, when the detection is made by the first door sensor 31 or the second door sensor 32, the accessible area of the portable device 10 is set to 1 m or more and less than 3 m. When the back door sensor 33 detects it, the accessible area of the portable device 10 is set to 3 m or more and less than 5 m. If the engine start unit 34 detects it, the accessible area of the portable device 10 is set to less than 1 m.
  • step 106 UWB communication for measuring the distance between the vehicle-mounted device 20 and the portable device 10 is started. Specifically, based on the control of the control unit 21 of the vehicle-mounted device 20, the UWB radio wave is transmitted from the UWB transmission / reception unit 22 via the antenna 23.
  • the UWB transmission / reception unit 12 of the portable device 10 receives the UWB radio wave transmitted from the vehicle-mounted device 20 via the antenna 13
  • the UWB radio wave from the UWB transmission / reception unit 12 of the portable device 10 via the antenna 13 is controlled by the control unit 11. To send.
  • the control unit 21 of the vehicle-mounted device 20 receives the UWB radio wave from the vehicle-mounted device 20.
  • the distance AX between the in-vehicle device 20 and the portable device 10 is calculated from the time when the in-vehicle device 20 is transmitted and the time when the UWB radio wave is received from the in-vehicle device 20.
  • step 110 it is determined whether or not the portable device 10 exists within the accessible area set in step 104 based on the distance AX between the vehicle-mounted device 20 and the portable device 10.
  • the operation detected in step 102 is determined to be a normal operation, and the process proceeds to step 112. If the portable device 10 does not exist in the accessible area set in step 104, the operation detected in step 102 is determined to be an illegal operation and ends.
  • step 112 the position of the portable device 10 is estimated from the distance AX between the vehicle-mounted device 20 and the portable device 10, and in step 114 (S114), between the vehicle-mounted device 20 and the portable device 10.
  • BLE communication is started, and in step 116 (S116), the determination of ID authentication is made.
  • the process proceeds to step 118 (S118), and control signals such as unlocking and locking are transmitted. If the ID is not authenticated, the process ends without unlocking or locking.
  • control of the electronic key system described above is performed by the control unit 21 of the in-vehicle device 20, but it can also be controlled by another control unit or the like inside the vehicle 50, and further, the control unit of the portable device 10. It is also possible to do it in 11.
  • the electronic key system in the present embodiment measures the distance between the portable device and the in-vehicle device in the wavelength band of BLE communication, and uses radio waves of one wavelength.
  • the electronic key system in the present embodiment is a portable device carried by a person such as a driver of a vehicle 50, and the control unit 11, the BLE transmission / reception unit 14, the antenna 15, and the like. It has a battery 16 and the like.
  • the vehicle-mounted device 120 is mounted on the vehicle 50 and has a control unit 21, a BLE transmission / reception unit 24, an antenna 25, and the like.
  • both the distance measurement and the communication are performed using BLE radio waves. Therefore, in the present embodiment, the BLE radio wave becomes the first radio wave, and the BLE transmission / reception unit 14 and the BLE transmission / reception unit 24 function as the first transmission / reception unit.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

La présente invention aborde le problème d'obtention d'un système de clé électronique pouvant empêcher une attaque de relais sur un véhicule. Le problème est résolu par un système de clé électronique ayant : un dispositif portatif porté par une personne et pourvu d'une première unité d'émission/réception pour émettre et recevoir une première onde radio et une unité de commande; un dispositif embarqué installé dans un véhicule et pourvu d'une première unité d'émission/réception pour émettre et recevoir la première onde radio et une unité de commande; et plusieurs capteurs fixés au véhicule et détectant une opération par la personne. Le système de clé électronique est caractérisé en ce que, lorsque l'opération par la personne est détectée par un capteur parmi la pluralité de capteurs, l'unité de commande du dispositif embarqué effectue une émission et une réception au moyen de la première onde radio entre le dispositif embarqué et le dispositif portatif, mesure la distance entre le dispositif embarqué et le dispositif portatif, définit une zone accessible correspondant au capteur qui a détecté l'opération par la personne, et détermine si l'emplacement du dispositif portatif sur la base de la distance existe dans la zone accessible définie.
PCT/JP2020/042797 2019-12-17 2020-11-17 Système de clé électronique WO2021124766A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-227696 2019-12-17
JP2019227696A JP2023002854A (ja) 2019-12-17 2019-12-17 電子キーシステム

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WO2021124766A1 true WO2021124766A1 (fr) 2021-06-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011052412A (ja) * 2009-08-31 2011-03-17 Tokai Rika Co Ltd 車両の電子キーシステム
JP2016020580A (ja) * 2014-07-14 2016-02-04 株式会社オートネットワーク技術研究所 車両用通信システム、車載機、携帯機、及びコンピュータプログラム
WO2019181416A1 (fr) * 2018-03-22 2019-09-26 株式会社東海理化電機製作所 Système de mesure de distance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011052412A (ja) * 2009-08-31 2011-03-17 Tokai Rika Co Ltd 車両の電子キーシステム
JP2016020580A (ja) * 2014-07-14 2016-02-04 株式会社オートネットワーク技術研究所 車両用通信システム、車載機、携帯機、及びコンピュータプログラム
WO2019181416A1 (fr) * 2018-03-22 2019-09-26 株式会社東海理化電機製作所 Système de mesure de distance

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