KR102489959B1 - Vehicle and control method thereof - Google Patents

Abstract

A vehicle according to an embodiment includes a transmitter for transmitting a first signal requesting user information to an external terminal, a receiver for receiving a second signal transmitted in response to the first signal from the external terminal, and the second signal. and a control unit for obtaining information about the user and distance information between the vehicle and the external terminal based on a signal, and determining whether the user has authority to control the vehicle based on the obtained information. can

Description

Vehicle and its control method {VEHICLE AND CONTROL METHOD THEREOF}

The present invention relates to a vehicle and a control method thereof, and more particularly, to a technology for preventing theft of a vehicle using an external terminal device.

In modern society, automobiles are the most common means of transportation, and the number of people using automobiles is increasing. BACKGROUND OF THE INVENTION Due to the development of automobile technology, many changes are occurring in life, such as making long-distance travel easier than in the past and making life more comfortable.

A lot of electronic devices such as hands-free devices, GPS receivers, Bluetooth devices, and high-pass devices are being developed for the convenience of drivers, and among automobile-related technologies, the electric and electronic fields are increasingly creating new value. .

Also, in the past, a vehicle door was opened and the vehicle was started using a vehicle key, but recently, many technologies for operating a vehicle using an external terminal device have been developed.

A vehicle remote control system refers to a system capable of opening and closing a vehicle door and starting a vehicle from the outside without a driver inserting a separate key into the vehicle's key box or a special operation for operation. A remote control device such as a FOB for wireless communication is used.

When a driver with a remote control device approaches the vehicle, the car door is unlocked automatically through Bluetooth (Low Frequency) communication with the remote control device and Bluetooth (Radio Frequency) communication, and a separate key is required. The door can be opened without inserting it, and the engine can be started without the process of inserting the ignition key after getting into the vehicle.

In addition, recently, technologies using external terminals such as smart phones have been developed, and these technologies are being expanded and developed by combining various functions such as vehicle entry and start, remote parking, and vehicle diagnosis by utilizing various wireless communications such as NFC and Bluetooth. .

Specifically, when a user brings an external terminal such as a smart phone into contact with the outside handle, the vehicle communicates with the external terminal using NFC or Bluetooth communication, through which the vehicle door can be locked or unlocked. In addition, when the user brings the external terminal into contact with a specific location, such as a center tray or start button of the vehicle, the power of the vehicle may be automatically turned on.

However, in the case of a technology using an external remote control device, due to its nature, signals transmitted from the vehicle are collected through an antenna near the vehicle and transmitted to a remote control device that exists at a distance from the vehicle, and the remote control device transmits the signal to the vehicle. The hacking problem of the radio signal of the repeater that transmits directly or collects the signal through an antenna and transmits it to the vehicle, that is, relay attack (relay attack is occurring.

Therefore, the present invention is an invention devised to solve the problems of the prior art as described above, and after acquiring distance information between the vehicle and the mobile terminal using the vibration sensor of the mobile terminal and beacon communication, based on this, the external An object of the present invention is to provide a vehicle and a control method of the vehicle capable of effectively preventing a relay attack of the above.

A vehicle according to an embodiment includes a transmitter configured to transmit a first signal requesting user information to an external terminal, a receiver configured to receive a second signal transmitted in response to the first signal from the external terminal, and the second signal and a control unit for acquiring information about the user and distance information between the vehicle and the external terminal based on, and determining whether the user has authority to control the vehicle based on the obtained information. there is.

The control unit may obtain motion information of the user and information about a change in distance between the external terminal and the vehicle for a preset time based on the second signal.

The control unit may lock or unlock the door of the vehicle when it is determined that the user has authority to control the vehicle.

When it is determined that the user has authority to control the vehicle, the control unit may turn on power of the vehicle or start the vehicle.

The transmitting unit may transmit the first signal to the external terminal when the user touches a handle of the vehicle or operates a power button.

The control unit may acquire information about a distance between the vehicle and the external terminal based on the second signal.

The control unit may determine whether the user has authority to control the vehicle based on the degree of movement of the user for a preset period of time.

The control unit may detect a change in the strength of the second signal for a preset time period, and based on this, determine whether the user has authority to control the vehicle.

When it is determined that the user does not have authority to control the vehicle, the control unit may lock or maintain the door of the vehicle in a locked state.

The transmitting unit and the receiving unit may transmit and receive signals with the external terminal using at least one of Near Field Communication (NFC), Bluetooth, and Wi-Fi.

The control unit, when the number of times it is determined that the user does not have the authority to control the vehicle exceeds a predetermined number of times during a preset period, turns off the power of the vehicle or turns off the vehicle. The start function can be blocked.

The transmission unit may transmit information about the vehicle state to the mobile terminal.

Another vehicle control method according to another embodiment includes transmitting a first signal requesting user information to an external terminal and receiving a second signal transmitted in response to the first signal from the external terminal. and acquiring information about the user and distance information between the vehicle and the external terminal based on the second signal, and determining whether the user has authority to control the vehicle based on the obtained information. steps may be included.

Acquiring the distance information may include acquiring motion information of the user and information about a change in distance between the external terminal and the vehicle for a preset time based on the second signal.

The step of determining whether the authority to control the vehicle may further include locking or unlocking the door of the vehicle when it is determined that the user has authority to control the vehicle. can include

In the step of determining whether the authority to control the vehicle exists, if it is determined that the user has the authority to control the vehicle, the power of the vehicle is turned on or the vehicle is started. The key may further include steps.

Transmitting the first signal may include transmitting the first signal to the external terminal when the user touches a handle of the vehicle or operates a power button.

Acquiring the distance information may include acquiring information about a distance between the vehicle and the external terminal based on the second signal.

Determining whether the authority to control the vehicle exists may include determining whether the user has authority to control the vehicle based on a degree of movement of the user for a preset period of time. .

The step of determining whether there is authority to control the vehicle may include detecting a change in the strength of the second signal for a preset time period, and determining whether the user has authority to control the vehicle based on this. steps may be included.

The step of determining whether there is authority to control the vehicle may further include locking or maintaining the door of the vehicle in a locked state when it is determined that the user does not have authority to control the vehicle. can include

Transmitting the first signal and receiving the second signal may include transmitting and receiving a signal with the external terminal using at least one of Near Field Communication (NFC), Bluetooth, and Wi-Fi. steps may be included.

In the step of determining whether the authority to control the vehicle exists, when the number of times that it is determined that the user does not have the authority to control the vehicle exceeds a predetermined number of times during a preset period of time, the vehicle of the vehicle. The method may further include turning off the power or blocking the starting function of the vehicle.

The vehicle control method may further include transmitting information about the vehicle state to the mobile terminal.

A vehicle according to an embodiment blocks a relay attack based on distance information between the vehicle and the mobile terminal, so it is possible to block relay attacks under more diverse conditions. Since beacons are used, relay attacks can be blocked more economically.

1 is an external view showing an external appearance of a vehicle according to an embodiment of the present invention.
2 is an internal view showing the inside of a vehicle according to an embodiment of the present invention.
3 and 4 are diagrams illustrating an example of communication between an external terminal and a vehicle according to an embodiment of the present invention.
5 is a block diagram showing some configurations of a vehicle according to an embodiment of the present invention.
6 is a diagram illustrating a process in which a relay attack is performed using a plurality of repeaters.
7 is a block diagram showing some configurations of a vehicle according to an embodiment of the present invention.
8 is a flowchart illustrating a method for controlling a vehicle according to an embodiment of the present invention.
9 is a diagram for explaining a first signal and a second signal according to an embodiment of the present invention.
10 is a diagram illustrating several examples of determining whether a user has authority to control a vehicle according to an embodiment of the present invention.

The configurations shown in the embodiments and drawings described in this specification are preferred examples of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings in this specification at the time of filing of the present application.

In addition, terms used in this specification are used to describe embodiments, and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as "include", "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or the existence or addition of more other features, numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

Also, terms including ordinal numbers such as “first” and “second” used in this specification may be used to describe various components, but the components are not limited by the terms.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted. Hereinafter, a vehicle in which the present invention is installed will be described with reference to FIGS. 1 and 2.

1 is an exterior view showing an external appearance of a vehicle according to an embodiment of the present invention, and FIG. 2 is an internal view showing an internal appearance of a vehicle according to an embodiment of the present invention. Hereinafter, descriptions will be made together to prevent duplication of description of the same content.

Referring to FIG. 1 , the exterior of a vehicle 100 according to an embodiment includes wheels 12 and 13 for moving the vehicle 100, a door 15L for shielding the inside of the vehicle 100 from the outside, and a vehicle 100 ) may include a windshield 16 providing a front view of the vehicle 100 to a driver inside, and side mirrors 14L and 14R providing a view of the rear of the vehicle 100 to the driver.

The wheels 12 and 13 include a front wheel 12 provided at the front of the vehicle and a rear wheel 13 provided at the rear of the vehicle, and a driving device (not shown) provided inside the vehicle 100 is ) may provide rotational force to the front wheels 12 or rear wheels 13 so as to move forward or backward. Such a driving device may employ an engine that generates rotational force by burning fossil fuel or a motor that generates rotational force by receiving power from a capacitor.

Doors 15L and 15R (see FIG. 2) are provided to be pivotable on the left and right sides of the vehicle 100 so that a driver or passenger can get inside the vehicle 100 when opened, and when closed, the vehicle ( 100) is shielded from the outside. In addition, handles 17L and 17R capable of opening and closing the doors 15L and 15R (see FIG. 2) may be provided outside the vehicle 100, and a Bluetooth (Low Frequency) signal may be transmitted to the handle 17L. Bluetooth antennas 111a and 111c (see FIG. 3) capable of recognizing a user's touch input and a touch sensor (not shown) capable of recognizing a user's touch input may be mounted.

When the touch sensing unit of the doors 15L and 15R detects the user's touch input while the user is holding the remote control device 200 (see FIG. 3), the vehicle 100 transmits the remote control device ( 200 (see FIG. 3) and authentication are performed, and when the authentication is completed, the door lock of the vehicle 100 is released, and the door 15L can be opened by the user pulling the handles 17L and 17R. Here, the user includes not only the driver but also a passenger inside the vehicle 100 and means a person who possesses the external terminal 200 .

The windshield 16 is provided on the front upper side of the body so that the driver inside the vehicle 100 can obtain visual information of the front of the vehicle 100, and is also referred to as a windshield glass.

In addition, the side mirrors 14L and 14R include a left side mirror 14L provided on the left side of the vehicle 100 and a right side mirror 14R provided on the right side of the vehicle 100, so that the driver inside the vehicle 100 can 100) to obtain side and rear visual information.

In addition, the vehicle 100 may include a sensing device such as a proximity sensor for detecting an obstacle or another vehicle on the rear or side, and a rain sensor for detecting whether or not there is precipitation and the amount of precipitation.

The proximity sensor may transmit a detection signal to the side or rear of the vehicle and receive a reflected signal reflected from an obstacle such as another vehicle. Based on the waveform of the received reflection signal, the presence or absence of an obstacle on the side or rear of the vehicle 100 may be detected, and the position of the obstacle may be detected. As an example of such a proximity sensor, a method of transmitting ultrasonic waves or infrared rays and detecting a distance to an obstacle using the ultrasonic waves or infrared rays reflected by the obstacle may be employed.

Referring to FIG. 2 , an AVN (Audio Video Navigation) display 71 and an AVN input unit 61 may be provided in a central area of the dashboard 29 . The AVN display 71 may selectively display at least one of an audio screen, a video screen, and a navigation screen, and may also display various control screens related to the vehicle 100 or screens related to additional functions.

The AVN display 71 may be implemented as a Liquid Crystal Display (LCD), Light Emitting Diode (LED), Plasma Display Panel (PDP), Organic Light Emitting Diode (OLED), Cathode Ray Tube (CRT), or the like.

The AVN input unit 61 may be provided as a hard key type in an area adjacent to the AVN display 71, or in the form of a touch panel on the front of the AVN display 71 when the AVN display 71 is implemented as a touch screen type. may be provided.

In addition, a jog shuttle type center input unit 62 may be provided between the driver's seat 18L and the passenger's seat 18R. The user may input a control command by turning, pressing, or pushing the center input unit 62 up, down, left, or right.

A sound output unit 80 capable of outputting sound may be provided in the vehicle 100 , and the sound output unit 80 may be a speaker. The sound output unit 80 may output sound necessary for performing an audio function, a video function, a navigation function, and other additional functions.

A steering wheel 27 is provided on the dashboard 29 on the driver's seat 18L side, and a remote control device 200 (as an example, a FOB key; see FIG. 3) is provided in an area adjacent to the steering wheel 27. A key groove 29a into which can be inserted may be formed. When the external terminal 200 is inserted into the key groove 29a or authentication between the external terminal 200 and the vehicle 100 is completed through a wireless communication network, the external terminal 200 and the vehicle 100 may be connected.

In addition, the dashboard 29 may be provided with a start button 31 for controlling the on/off of the vehicle 100, and the external terminal 200 may be inserted into the key groove 29a or via a wireless communication network. When authentication between the external terminal 200 and the vehicle 100 succeeds, the vehicle 100 may be turned on by pressing the start button 31 by the user.

Meanwhile, the vehicle 100 is equipped with an air conditioner to perform both heating and cooling, and the heated or cooled air can be discharged through the vent 21 to control the temperature inside the vehicle 100 .

3 and 4 are diagrams illustrating an example in which an external terminal 200 and a vehicle 100 perform communication according to an embodiment, and FIG. 5 is for explaining the concept of a beacon using Bluetooth communication. FIG. 6 is a diagram for explaining a procedure in which a relay attack is performed.

Referring to FIGS. 3 and 4 , the external terminal 200 directly contacts the vehicle 100 or is connected through transmission and reception of wireless signals. As an example disclosed in FIG. 3 , the external terminal 200 may be connected to the vehicle 100 to release a door lock or serve as a FOB key enabling start-up and driving.

The external terminal 200 in the embodiment disclosed in FIG. 3 may correspond to a mobile device such as a smart phone. If the external terminal 200 is a mobile device, an application capable of executing an operation as a remote control device may be installed. The mobile device may be sold with the application installed, or may be downloaded from a server after sale. In addition, in order for the mobile device to operate as a remote control device for the vehicle 100, it may undergo an authentication procedure.

In addition, the vehicle 100 may communicate with the external terminal 200 using a beacon device. Specifically, by transmitting a Bluetooth signal to the external terminal 200 and receiving another Bluetooth signal transmitted from the external terminal 200, information of the external terminal 200 close to the vehicle 100 and information necessary for user authentication are obtained. You can request and receive.

Accordingly, the vehicle 100 may include a communication unit 110 to transmit and receive Bluetooth signals, and the communication unit 111 may include one or more beacon devices 110a to 110d.

A beacon refers to a device that performs a short-range wireless communication device based on the Bluetooth 4.0 (BLE) protocol, and Bluetooth communication refers to a one-way communication technology in which a transmitter transmits only transmitter ID and power intensity information unilaterally to a space.

In the case of Bluetooth communication, the location of a Bluetooth device can be determined with an accuracy of 5 to 10 cm without a GPS signal, and it is possible to communicate with devices within a maximum distance of 70 m. 5 is a diagram illustrating the concept of a data packet of a signal transmitted through a beacon. The signal transmitted through a beacon includes information (a) on a transmitter ID and information on the strength (b) of a transmitted signal. can do.

Transmitter information can be determined by the ID transmitted by the transmitter, and the distance can be determined by comparing the output signal strength information with the actually received signal strength.

In the vehicle 100 according to an embodiment, when the communication unit 110 transmits the first signal requesting user information to the external terminal 200 and then receives the second signal transmitted from the external terminal 200 After acquiring distance information between the mobile terminal 200 and the vehicle 100 based on the received second signal, based on the acquired distance information, whether or not the user has authority to control the vehicle 100 exists. can judge about it. A detailed description of this will be described later.

Each of the beacon devices 110a to 110d is provided on the front, rear, side, or inside of the body of the vehicle 100 to perform Bluetooth communication with the external terminal 200 at various angles and strengths. Depending on the location of the beacon devices 110a to 110d, the reception strength and reception direction of the Bluetooth signal of the external terminal 200 may vary.

Referring to FIG. 4 , when the external terminal 200 is within a range capable of transmitting and receiving a Bluetooth signal from the vehicle 100, the vehicle 100 may transmit a Bluetooth signal to the external terminal 200, and the external terminal ( 200) can receive a signal transmitted from it.

Meanwhile, when the external terminal 200 does not exist within a distance capable of transmitting and receiving a Bluetooth signal from the vehicle 100, even if the vehicle 100 transmits a Bluetooth signal, the external terminal 200 cannot receive it. The external terminal 200 that has not received the Bluetooth signal cannot transmit a Bluetooth signal as a response signal to the vehicle 100 .

However, referring to FIG. 6 , even when the external terminal 200 does not exist within a distance capable of transmitting and receiving a Bluetooth signal, the relays (relay 1 and relay 2) attempting a relay attack may attack the vehicle 100. ) and the external terminal 200, the Bluetooth signal may be transmitted to the external terminal 200.

Specifically, the first repeater (relay1, 300) exists within a distance capable of transmitting and receiving a Bluetooth signal from the vehicle 100, and the second repeater (relay2, 400) exists within a distance capable of transmitting and receiving a Bluetooth signal from the external terminal 200. ) exists, the first repeater (relay1, 300) modulates the Bluetooth signal transmitted from the vehicle 100 into a high frequency band and transmits it to the second repeater (relay2, 400), and the second repeater (relay2, 400) The Bluetooth signal can be transmitted to the external terminal 200 at a long distance by demodulating the Bluetooth signal back to the original frequency band and transmitting it to the external terminal 200 .

That is, the first repeater (relay1, 300) may modulate the frequency band of the Bluetooth signal received from the vehicle 100 into a high frequency band in order to increase the transmittable distance of the Bluetooth signal.

In addition, the second repeater (relay2, 400) existing within a distance capable of transmitting and receiving a Bluetooth signal from the vehicle 100 transmits a Bluetooth signal to the vehicle 100 as a response signal, so that the authentication process can be abnormally completed.

In addition, although not shown, even when the external terminal 200 does not exist within a possible distance for transmitting and receiving Bluetooth signals from the vehicle 100, Bluetooth signals can be transmitted and received from the vehicle 100 and the external terminal 200. The authentication process may be abnormally completed by a repeater existing within a certain distance transmitting a Bluetooth signal from the external terminal 200 to the vehicle 100 .

Therefore, the present invention is an invention devised to solve this problem, and the vehicle 100 according to an embodiment determines whether the relay is involved in the authentication process between the vehicle 100 and the external terminal 200, that is, a relay attack It is possible to prevent a relay attack in advance by determining whether it has occurred. Hereinafter, a detailed configuration and control method of the vehicle 100 according to an exemplary embodiment will be described.

Referring to FIG. 7 , a vehicle 100 according to an embodiment includes a communication unit 110 for transmitting and receiving wireless signals, a control unit 120 for controlling operations of components of the vehicle 100, and a storage unit for storing data. (130).

The communication unit 110 of the vehicle 100 may include a transmitter 111 for transmitting a signal to the external terminal 200 using Bluetooth communication and a receiver 112 for receiving a signal from the external terminal 200. Accordingly, the communication unit 110 may include a plurality of beacon devices for transmitting and receiving Bluetooth signals.

The beacon device may be provided on the front, rear, side, or inside of the body of the vehicle 100 to transmit and receive Bluetooth signals at different angles and different intensities.

Specifically, the beacon device may be provided in the handle 17R of the right door 15R, the handle 17L of the left door 15L, the top of the main body, and the trunk.

The transmission unit 111 of the communication unit 110 may transmit a first signal requesting information about the user to the external terminal 200 . Specifically, when the user touches the handle of the vehicle 100 or operates the power button, the transmitter 111 transmits the user to the external terminal 200 to determine whether a user having authority to actually control the vehicle has accessed. A first signal requesting information of may be transmitted.

The receiving unit 112 of the communication unit 110 may receive a second signal transmitted in response to the first signal from the external terminal 200 .

Specifically, the receiving unit 112 may receive a second signal including motion information of the user and distance information between the vehicle 100 and the external terminal 200 for a preset period of time.

In addition, although Bluetooth communication is described herein as a method in which the communication unit 110 and the external terminal 200 transmit and receive signals, the communication unit 110 and the external terminal 220 are not limited thereto, and the communication unit 110 and the external terminal 220 use NFC (Near Signals may be transmitted and received to each other using Field Communication (Wi-Fi) communication or Wi-Fi (Wireless-Fidelity) communication.

In addition, although not shown in the drawing, the communication unit 110 is a remote control device capable of remotely controlling the vehicle 100, and an LF transmission unit (not shown) for transmitting an LF signal, an RF signal within an RF transmission and reception distance through an RF communication network It may also include an RF receiver (not shown) for receiving, and a high frequency receiver (not shown) for receiving a signal of a frequency band preset in the vehicle 100.

The controller 120 may control each component included in the vehicle 100 .

The control unit 120 according to an embodiment acquires information about the user and distance information between the vehicle 100 and the external terminal 220 based on the second signal received by the receiver 112, and based on the acquired information. As a result, it is possible to determine whether the user has authority to control the vehicle 100 .

Since the external terminal 200 such as a smart phone generally has an acceleration sensor and an angular velocity sensor (gyroscope sensor), the external terminal 200 measures the degree of movement and vibration of the external terminal 200 for a preset time. can judge

Accordingly, when receiving the first signal from the vehicle 100, the external terminal 200 may transmit a second signal including movement information of the external terminal 200 to the vehicle 100. Then, since the motion information of the external terminal 200 may be referred to as user motion information, the control unit 120 may obtain the user motion information for a preset time based on the second signal.

In addition, since the second signal transmitted by the external terminal 200 is a signal based on Bluetooth, NFC, or Wi-Fi communication, the strength of the received signal may vary depending on the distance from the vehicle 100. Accordingly, the control unit 200 may acquire distance information between the vehicle 100 and the user based on the strength of the received signal.

Also, here, the preset time may mean a sufficient time for the control unit 120 to obtain user information and distance information based on the second signal. It may be the time after a certain time has elapsed after the external terminal 200 transmits the first signal, and the time after a certain time has elapsed after the vehicle 200 first receives the second signal corresponds to this. can In addition, it can be set to various times according to the operating environment of the user.

In addition, when it is determined that the user has authority to control the vehicle 100 based on the second signal, the controller 120 may lock or unlock the door of the vehicle 100, The power or starting function of the vehicle 100 may be turned on.

Conversely, when the number of times it is determined that the user does not have the authority to control the vehicle 100 exceeds a certain number of times during a preset period, the control unit 120 determines that there is an intrusion from the outside and powers on the vehicle 100. may be turned off or the starting function of the vehicle 100 may be blocked.

In this case, the control unit 120 may transmit the determination result to the communication unit 110, and the transmission unit of the communication unit 110 may transmit information about the current state of the vehicle 100 to the mobile terminal 200 of the user.

In addition, the control unit 120 may perform the above operations using a memory (not shown) storing data for an algorithm for controlling the operation of components in the vehicle 100 or a program that reproduces the algorithm, and the data stored in the memory. It may be implemented as a processor (not shown) that performs. In this case, the memory and the processor may be implemented as separate chips. Alternatively, the memory and the processor may be implemented as a single chip.

The storage unit 130 stores an ID shared with the external terminal 200 and authentication information.

The storage unit 130 may include a non-volatile memory device such as a cache, read only memory (ROM), programmable ROM (PROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), and flash memory or RAM. It may be implemented as at least one of a volatile memory device such as (Random Access Memory), a hard disk drive (HDD), or a storage medium such as a CD-ROM, but is not limited thereto. The storage unit 130 may be a memory implemented as a separate chip from the processor described above in relation to the controller 120, or may be implemented as a single chip with the processor.

At least one component may be added or deleted corresponding to the performance of components of the vehicle 100 shown in FIG. 7 . In addition, it will be easily understood by those skilled in the art that the mutual positions of the components may be changed corresponding to the performance or structure of the system.

Meanwhile, each component shown in FIG. 7 may be software and/or hardware components such as a Field Programmable Gate Array (FPGA) and an Application Specific Integrated Circuit (ASIC).

Hereinafter, a specific control method of the vehicle 100 will be described with reference to FIGS. 8 to 10 .

8 is a flowchart illustrating a method for controlling a vehicle according to an embodiment, and FIG. 9 is a diagram for explaining a first signal and a second signal according to an embodiment of the present invention.

Referring to FIG. 8 , the vehicle 1 may determine whether a user approaches the vehicle 1 and whether an external terminal is detected (S100, S200).

Specifically, it is possible to determine whether the external terminal 200 has approached the vehicle based on whether or not it has entered within a communication distance with the vehicle 1 through the communication device, and the user touches the handle of the vehicle 100 or When the start button is touched, it may be determined that the user has approached the vehicle 100 .

When the external terminal 200 is detected, the vehicle 1 may transmit a first signal requesting user information to the external terminal 200, and a response signal corresponding to the first signal from the external terminal 200 A second signal may be received. (S300, S400)

Communication between the vehicle 1 and the external terminal 200 may be performed using at least one of Bluetooth communication, NFC (Near Field Communication) communication, and Wi-Fi (Wireless-Fidelity) communication, and the second signal includes an external terminal Information capable of obtaining motion information of 200 and distance information to the vehicle 100 may be included.

If the second signal is received, the vehicle 100 may acquire user information and distance information based on the received second signal (S500).

9, the second signal transmitted from the external terminal 200 to the vehicle 1 may include user movement information and information about the distance between the vehicle 100 and the external terminal 200. there is.

Specifically, as the user's movement information, information on how much the user has moved may be acquired using an acceleration sensor and an angular velocity sensor provided in the external terminal 200 .

As shown in the left side of the graph for the amount of movement in FIG. 9 , when there are many changes in the graph, information that the user has moved that much can be inferred. However, as shown on the right side of the graph for the amount of movement, if the change in the graph is small, information that the user has hardly moved can be inferred.

In addition, looking at the graph of signal strength in FIG. 9 , the signal strength decreases with time. In the case of a Bluetooth signal, the signal strength decreases in proportion to the distance. Therefore, when obtaining such a graph, the user can infer that the user is gradually moving away from the vehicle. Through this process, information about the user and distance information can be obtained.

If the information about the user and the distance information are acquired, it is determined whether the user has authority to control the vehicle 100 based on this (S600).

When it is determined that the user has the authority to control the vehicle 100 based on the second signal, the door of the vehicle 100 may be locked or unlocked, and the power of the vehicle 100 or The start function can be turned on. (S700)

Conversely, if the number of times it is determined that the user does not have the authority to control the vehicle 100 exceeds a certain number of times during a preset period, it is determined that there is an intrusion from the outside and the power of the vehicle 100 is turned off. or block the starting function of the vehicle 100.

FIG. 10 is a diagram illustrating several examples of determining whether a user has authority to control the vehicle 100 according to an embodiment.

In the case of type 1, it can be seen that the user's movement is continuous and the strength of the beacon signal constantly increases. This corresponds to the case where the user normally carries the mobile terminal 200 and approaches the vehicle, 100) can be judged to have a legitimate right to control.

In the case of type 2, although the user's movement is insignificant, since the strength of the beacon signal is constantly strong, it can be known that the user is staying around the vehicle 100 . This case corresponds to the case where the user normally possesses the mobile terminal 200, approaches the vehicle, and then stays near the vehicle 100, so it can be determined that the user has a legitimate right to control the vehicle 100.

In the case of type 3, although the user's movement is observed, it can be seen that the strength of the beacon signal is getting weaker. This corresponds to a case where an actual user is moving away from the vehicle 100 and there is no user around the vehicle 100 . However, in this case, if the vehicle 100 receives the signal, it corresponds to a relay attack, and thus, it may be determined that a person who wants to enter the vehicle 100 does not have a legitimate authority to control the vehicle 100 . Thus, it is possible to keep the door locked and shut off the starting function.

In the case of type 4, it can be seen that the user's movement is not observed and the strength of the beacon signal is also maintained in a weak state. This corresponds to a case where an actual user is not around the vehicle 100 . However, in this case, if the vehicle 100 receives the signal, it corresponds to a relay attack, and thus, it may be determined that a person who wants to enter the vehicle 100 does not have a legitimate authority to control the vehicle 100 . Thus, it is possible to keep the door locked and shut off the starting function.

In the case of type 5, the user's movement was observed, but the strength of the beacon signal suddenly increased, and this can be determined as an approach using equipment. That is, since it corresponds to a relay attack rather than a normal user's access, it may be determined that a person who wants to enter the vehicle 100 does not have a legitimate right to control the vehicle 100 . Thus, it is possible to keep the door locked and shut off the starting function.

In the case of type 6, the user's movement is not observed and the strength of the beacon signal suddenly increases, which can be determined as an approach using equipment. That is, since it corresponds to a relay attack rather than a normal user's access, it may be determined that a person who wants to enter the vehicle 100 does not have a legitimate right to control the vehicle 100 . Thus, it is possible to keep the door locked and shut off the starting function.

In FIG. 10, various embodiments of determining whether or not a legitimate user have been described, but the present invention is not limited thereto, and if it is possible to determine whether the user has a valid source of authority to control the vehicle 1 based on the second signal information, this will be the case. can

So far, the vehicle 100 and the control method of the vehicle 100 according to an exemplary embodiment have been described.

In the case of a technology using an external remote control device, due to its characteristics, signals transmitted from the vehicle are collected through an antenna near the vehicle and transmitted to a remote control device that exists far away from the vehicle, and the remote control device directly transmits the signal to the vehicle. There is no technology that can effectively prevent the hacking problem of the wireless signal of the repeater, that is, the relay attack (relay attack), which collects signals through an antenna or the like and transmits them to the vehicle.

However, since the vehicle 100 according to an embodiment blocks relay attacks based on distance information between the vehicle 100 and the mobile terminal, there is an effect of blocking relay attacks under more diverse conditions. In addition, since a sensor and a beacon provided in the mobile terminal 200 are used, relay attacks can be blocked more economically.

Although the embodiments so far have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved. Therefore, other embodiments and equivalents of the claims fall within the scope of the following claims.

100: vehicle
110: communication department
120: control unit
130: storage unit
200: external terminal
300: first repeater
400: second repeater

Claims (24)

a transmitter for transmitting a first signal requesting user information to an external terminal;
a receiver configured to receive a second signal transmitted in response to the first signal from the external terminal; and
Based on the second signal, information about the degree of movement of the user and the change in the intensity of the second signal is acquired for a preset time, and the information about the degree of movement of the user and the change in the intensity of the second signal are obtained. A vehicle comprising: a control unit that determines whether the user has authority to control the vehicle based on information about the vehicle. delete According to claim 1,
The control unit,
A vehicle that locks or unlocks a door of the vehicle when it is determined that the user has authority to control the vehicle. According to claim 1,
The control unit,
When it is determined that the user has authority to control the vehicle, the vehicle turns on the power of the vehicle or starts the vehicle. According to claim 1,
The sending unit,
A vehicle that transmits the first signal to the external terminal when the user touches a handle of the vehicle or operates a power button. According to claim 1,
The control unit,
A vehicle that obtains information on a distance between the vehicle and the external terminal based on the second signal. delete delete According to claim 1,
The control unit,
A vehicle that locks or maintains a door of the vehicle when it is determined that the user does not have the authority to control the vehicle. According to claim 1,
The transmitter and receiver,
A vehicle that transmits and receives signals with the external terminal using at least one of Near Field Communication (NFC), Bluetooth, and Wi-Fi. According to claim 10,
The control unit,
When the number of times that it is determined that the user does not have the authority to control the vehicle exceeds a predetermined number of times during a preset period, the vehicle's power is turned off or the vehicle's starting function is blocked. vehicle to do. According to claim 11,
The sending unit,
A vehicle that transmits information about the state of the vehicle to the external terminal. Transmitting a first signal requesting information about a user to an external terminal;
receiving a second signal transmitted in response to the first signal from the external terminal;
Acquiring information about the degree of movement of the user and the change in strength of the second signal for a preset time based on the second signal; and
and determining whether the user has authority to control the vehicle based on the acquired information about the degree of movement of the user and the change in strength of the second signal. delete According to claim 13,
The step of determining whether the authority to control the vehicle exists,
The vehicle control method further comprising locking or unlocking a door of the vehicle when it is determined that the user has authority to control the vehicle. According to claim 13,
The step of determining whether the authority to control the vehicle exists,
The method of controlling a vehicle further comprising turning on power of the vehicle or starting the vehicle when it is determined that the user has authority to control the vehicle. According to claim 13,
Transmitting the first signal,
and transmitting the first signal to the external terminal when the user touches a handle of the vehicle or operates a power button. According to claim 13,
Acquiring information about the degree of movement of the user and the change in the intensity of the second signal for a preset time based on the second signal,
and acquiring information on a distance between the vehicle and the external terminal based on the second signal. delete delete According to claim 13,
The step of determining whether the authority to control the vehicle exists,
The vehicle control method further comprising locking or maintaining a locked state of a door of the vehicle when it is determined that the user does not have authority to control the vehicle. According to claim 13,
Transmitting the first signal and receiving the second signal,
A method for controlling a vehicle, comprising transmitting and receiving a signal with the external terminal using at least one of Near Field Communication (NFC), Bluetooth, and Wi-Fi. 23. The method of claim 22,
The step of determining whether the authority to control the vehicle exists,
When the number of times it is determined that the user does not have the authority to control the vehicle exceeds a predetermined number of times during a preset period, the vehicle's power is turned off or the vehicle's starting function is blocked. A method of controlling a vehicle further comprising the step of doing. According to claim 23,
The method of controlling a vehicle further comprising transmitting information about the state of the vehicle to the external terminal.

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