JP2020100994A - On-vehicle device - Google Patents

Abstract

To make it possible to suppress an increase in dark current of a vehicle while enhancing responsiveness until an unlocking is permitted even when an electronic key and a portable terminal are available as a key in a coexistence manner in an electronic key system.SOLUTION: Provided are: a counting part 412 for counting an electronic key use count, the number of times of using an electronic key 2 for authentication by an authentication unit 406 and a portable terminal use count, the number of times of using a portable terminal 3 for authentication by the authentication unit 406; and a restriction processing unit 413 for stopping either an electronic key detection polling or a portable terminal detection polling according to the result obtained by counting by the counting unit 412.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to an in-vehicle device.

2. Description of the Related Art Conventionally, there is known an electronic key system that permits locking and unlocking of a vehicle by authentication via wireless communication between the vehicle and the electronic key. In this electronic key system, in order to improve responsiveness until unlocking is permitted, a request signal requesting a response from the electronic key is periodically sent from the vehicle side regardless of the presence or absence of the electronic key in the vicinity of the vehicle. There is known a technique for performing polling to be transmitted to.

Further, in recent years, a technique of using a mobile terminal as a substitute for an electronic key has been proposed. For example, in Patent Document 1, when an authorized driver approaches a vehicle and presses a call button of a mobile terminal, which is a mobile phone, the vehicle-mounted device receives a call signal, and the mobile device included in the call signal. A technique for unlocking a door when the ID number of a terminal is correct is disclosed.

JP-A-2003-120097

Even if it becomes possible to use the mobile terminal as a substitute for the electronic key, it is considered that some users are reluctant to use the mobile terminal as a substitute for the electronic key. Therefore, in the authentication system, it is considered necessary to use the electronic key and the mobile terminal together as a key.

When the electronic key and the mobile terminal can be used together as a key in the electronic key system, the user can select which of the electronic key and the mobile terminal to use as the key, but on the vehicle side, the user can select the electronic key and the mobile terminal. It is difficult to determine which is used as the key. Therefore, when the user uses the electronic key as a key, polling is performed regardless of whether the user uses the electronic key or the mobile terminal as the key in order to improve the responsiveness until the unlocking is permitted. I think it will be.

However, if polling is performed regardless of whether the user uses the electronic key or the mobile terminal as the key, when the user uses the mobile terminal as the key, polling is unnecessarily performed. Since the current used for polling is the dark current of the vehicle, wasteful polling causes an unnecessary increase in dark current.

An object of this disclosure is to increase the dark current of a vehicle while improving the responsiveness until unlocking is allowed even when an electronic key and a mobile terminal can be used as keys in an electronic key system. An object of the present invention is to provide an in-vehicle device capable of suppressing the above.

The above objective is achieved by a combination of the features described in the independent claims, and the subclaims define further advantageous embodiments of the disclosure. Reference numerals in parentheses in the claims indicate a correspondence relationship with specific means described in the embodiments described later as one aspect, and do not limit the technical scope of the present disclosure. ..

In order to achieve the above-mentioned object, the vehicle-mounted device of the present disclosure is used in a vehicle and performs authentication via a first wireless communication with an electronic key (2) and a mobile terminal (3) other than the electronic key. Between the authentication unit (406) capable of performing any of the authentications via the second wireless communication between the two, and locking/unlocking the vehicle door based on the authentication being established by the authentication unit. An on-vehicle device including a permitting unit (410) for permitting, an electronic device that periodically transmits a request signal requesting a response to an electronic key from a vehicle for authentication via a first wireless communication. While key detection polling is performed, for authentication via the second wireless communication, mobile terminal detection polling is performed in which information for communication connection with the mobile terminal is periodically transmitted from the vehicle. A count unit (412) that counts the number of times the electronic key is used, which is the number of times the electronic key is used for authentication in the authentication unit, and the number of times that the mobile terminal is used, which is the number of times the mobile terminal is used for authentication in the authentication unit. And a restriction processing unit (413) for stopping one of the electronic key detection polling and the mobile terminal detection polling according to the result of counting by the counting unit.

According to this, the authentication unit performs either of the authentication via the first wireless communication with the electronic key and the authentication via the second wireless communication with the mobile terminal other than the electronic key. It is also possible to perform the above, and the permission unit permits the locking and unlocking of the vehicle door based on the fact that the authentication is successful in the authentication unit. Therefore, in the electronic key system including the in-vehicle device, the electronic key and the mobile terminal can be used together as a key. Depending on the result of counting by the counting unit, the number of times the electronic key is used, which is the number of times the electronic key is used for authentication in the authentication unit, and the number of times the mobile terminal is used, which is the number of times the mobile terminal is used for authentication in the authentication unit Then, one of the electronic key detection polling and the mobile terminal detection polling is stopped, so that it is possible to stop the polling of the side of the electronic key and the mobile terminal that is not used by the user. Therefore, as compared with the case where neither the electronic key detection polling nor the portable terminal detection polling is stopped, it is possible to suppress an increase in dark current of the vehicle due to polling. In addition, since polling on the side more used by the user is not stopped, it is possible to improve responsiveness until unlocking is permitted. As a result, even when the electronic key and the mobile terminal can be used as a key in the electronic key system, it is possible to suppress the increase in dark current of the vehicle while improving the responsiveness until the unlocking is permitted. become.

FIG. 1 is a diagram showing an example of a schematic configuration of a vehicle authentication system 1. It is a figure which shows an example of a schematic structure of the electronic key 2. It is a figure which shows an example of a schematic structure of the portable terminal 3. It is a figure which shows an example of a schematic structure of the vehicle side unit 4. It is a figure which shows an example of a schematic structure of the collation ECU40. 6 is a flowchart showing an example of the flow of a combined use related process in the verification ECU 40. It is a figure for demonstrating an example in case a user uses the portable terminal 3 as a key of a vehicle. It is a figure for demonstrating an example in case a user uses the electronic key 2 as a key of a vehicle.

A plurality of embodiments for disclosure will be described with reference to the drawings. Note that, for convenience of description, between a plurality of embodiments, parts having the same functions as the parts shown in the drawings used in the above description are denoted by the same reference numerals, and the description thereof may be omitted. is there. For the parts denoted by the same reference numerals, the description in other embodiments can be referred to.

(Embodiment 1)
<Schematic configuration of vehicle authentication system 1>
Hereinafter, Embodiment 1 of the present disclosure will be described with reference to the drawings. The vehicle authentication system 1 shown in FIG. 1 includes an electronic key 2, a mobile terminal 3, and a vehicle-side unit 4. The electronic key 2 is a so-called Bob and is carried by the user. The mobile terminal 3 is an information processing terminal such as a multifunctional mobile phone such as a smartphone and a tablet terminal, which is separate from the electronic key 2, and is carried by a user. In the following, the following description will be given by taking the case where the mobile terminal 3 is a smartphone (hereinafter, a smartphone) as an example.

In the vehicle authentication system 1, code matching is performed between the electronic key 2 and the vehicle-side unit 4 via wireless communication, and based on the fact that the authentication by the code verification is successful, locking and unlocking of the vehicle door is permitted. The functions of the smart entry system are available. Further, in the vehicle authentication system 1, the mobile terminal 3 and the vehicle-side unit 4 perform code verification via wireless communication, and based on the verification being established by the code verification, the vehicle door is locked and unlocked. The function of the smartphone key system that permits is also available. This vehicle authentication system 1 corresponds to an electronic key system.

<Schematic configuration of electronic key 2>
Next, the electronic key 2 will be described with reference to FIG. As shown in FIG. 2, the electronic key 2 includes a controller 20, an LF receiver 21, and an RF transmitter 22.

The LF receiving unit 21 has an LF receiving antenna, and receives a request signal (hereinafter referred to as a request signal) transmitted from the vehicle-side unit 4 on an LF (Low Frequency) band radio wave. The request signal received by the LF receiver 21 includes, for example, a wake signal including a code for shifting the electronic key 2 to a wakeup state, a challenge signal for requesting transmission of a code for code verification, and the like. The challenge signal includes a random number code. As the request signal, the wake signal and the challenge signal may be separately used, or a signal in which the wake signal and the challenge signal are integrated may be used.

The LF receiving unit 21 has, for example, an IC or the like, and when the request signal includes a code for shifting to the wakeup state, determines the validity of this code. As an example, the pattern is compared with a regular code pattern registered in advance in the non-volatile memory of the LF receiver 21 to determine whether the regular code is a regular code. Then, when it is determined that the pattern is a regular pattern, the control unit 20 in the sleep state is shifted to the wakeup state. The sleep state is a state in which power consumption is significantly suppressed as compared with the wakeup state. On the other hand, when the LF receiving unit 21 determines that the pattern is not a regular pattern, it does not shift the control unit 20 in the sleep state to the wakeup state.

The RF transmission unit 22 has an RF transmission antenna, electrically processes the original signal input from the control unit 20, generates a response signal to the signal received by the LF reception unit 21, and outputs the response signal. Is transmitted from the RF transmission antenna to the vehicle-side unit 4 on the radio wave in the RF band. In the present embodiment, the following description will be made on the assumption that the response signal is transmitted on the radio wave in the UHF band of the RF band. The UHF band is, for example, an ultra-high frequency band of 300 MHz to 3 GHz. Signal exchange between the electronic key 2 and the vehicle side unit 4 on the LF band radio wave from the vehicle side unit 4 to the electronic key 2 and the UHF band radio wave from the electronic key 2 to the vehicle side unit 4 The exchange of signals carried on the device corresponds to the first wireless communication.

The control unit 20 is composed of, for example, an IC, a memory, etc., and generates an original signal of a response signal corresponding to the request signal received by the LF receiving unit 21, and outputs this original signal to the RF transmitting unit 22. When the request signal received by the LF receiving unit 21 includes a random number code, the control unit 20 encrypts this random number code with the secret key and the encryption algorithm used in the common key cryptosystem, and outputs the encrypted code. To generate. Then, the original signal of the response signal including the encrypted code is output to the RF transmission unit 22. On the other hand, when the request signal does not include the random number code, the control unit 20 outputs to the RF transmission unit 22 the original signal of the response signal indicating that the request signal is received, which does not include the encryption code. Good.

<Schematic configuration of mobile terminal 3>
Next, the mobile terminal 3 will be described with reference to FIG. As shown in FIG. 3, the mobile terminal 3 includes a control unit 30 and a communication module 31. In the present embodiment, for convenience, the description of the mobile terminal 3 is omitted except for the configuration related to the smartphone key system.

The communication module 31 is a communication module for performing wireless communication with the vehicle-side unit 4. The wireless communication between the communication module 31 and the vehicle-side unit 4 may be wireless communication according to the short-range wireless communication standard. In the present embodiment, the following description will be given by taking an example of using wireless communication according to Bluetooth (registered trademark) Low Energy (hereinafter, BLE). The wireless communication according to the short-distance wireless communication standard between the mobile terminal 3 and the vehicle-side unit 4 corresponds to the second wireless communication. The communication module 31 regularly scans and receives the advertising information that is periodically transmitted from the vehicle side unit 4, and establishes a connection with the vehicle side unit 4. Then, information is transmitted and received through this connection, which is a virtual dedicated communication path.

The control unit 30 is composed of, for example, a processor and a memory, and executes processing related to the smartphone key system. When the communication connection between the communication module 31 and the vehicle side unit 4 is performed, the control unit 30 outputs a code for code matching to the communication module 31 and causes the vehicle side unit 4 to transmit this code. As an example, when a random number code is transmitted from the vehicle-side unit 4, this random number code acquired via the communication module 31 is encrypted with a secret key and an encryption algorithm used in the common key cryptosystem, and encrypted. Generate code. Then, this encrypted code may be output to the communication module 31 as a code for code verification. The code for code matching may be a code distributed from the center or the like as the regular key information of the vehicle.

<Schematic configuration of vehicle-side unit 4>
Next, an example of a schematic configuration of the vehicle-side unit 4 will be described with reference to FIG. As shown in FIG. 4, the vehicle unit 4 includes a verification ECU 40, an LF transmitter 41, an RF receiver 42, a lock/unlock switch (hereinafter, lock/unlock SW) 43, a start switch (hereinafter, start SW) 44, a vehicle. A state sensor 45, a body ECU 46, a meter ECU 47, a power unit ECU 48, a smartphone key ECU 49, and a BLE module 50 are included. For example, the verification ECU 40, the vehicle state sensor 45, the body ECU 46, the meter ECU 47, and the power unit ECU 48 may be connected to the in-vehicle LAN.

The LF transmitter 41 transmits a request signal from the LF transmission antenna using an LF band radio wave in accordance with an instruction from the verification ECU 40. A plurality of LF transmission antennas may be provided in the vehicle. The RF receiver 42 receives a response signal transmitted from the electronic key 2 side in a UHF band radio wave.

For example, the LF transmission antenna may be provided near the driver's seat door, the passenger seat door, the rear bumper, the passenger compartment, and the like. After that, the LF transmitting antenna near the driver's door is the D seat antenna, the LF transmitting antenna near the passenger door is the P seat antenna, the LF transmitting antenna near the rear bumper is the rear bumper antenna, and the LF transmitting antenna in the passenger compartment is the passenger compartment. Call it an antenna. The communication range of the D-seat antenna is limited to the vicinity of the vehicle door on the driver's seat, the communication range of the P-seat antenna is limited to the vicinity of the vehicle door on the passenger side, and the communication range of the rear bumper antenna is near the rear bumper. The communication range of the vehicle interior antenna is limited to the vehicle interior. The communication range of the D-seat antenna, P-seat antenna, and rear bumper antenna extends outside the vehicle cabin. The D-seat antenna, P-seat antenna, and rear bumper antenna are collectively referred to as the vehicle exterior antenna.

The locking/unlocking SW 43 is a switch for requesting locking and unlocking of vehicle doors such as a driver's seat door, a passenger seat door, and a luggage compartment door. The locking/unlocking SW 43 may be provided on the outer door handle of the vehicle or on the rear bumper. As the lock/unlock SW43, for example, a touch switch or a mechanical button switch can be used. The signal of the locking/unlocking SW 43 may be output to the body ECU 46, for example.

The start SW 44 is, for example, a switch provided in front of the driver's seat for requesting start of a traveling drive source of the vehicle. As the starting SW 44, for example, a mechanical button switch may be used. The signal of the starting SW 44 may be output to the verification ECU 40, for example.

The vehicle state sensor 45 is a sensor group for detecting information about vehicle behavior such as a traveling state and an operating state of the vehicle. Examples of the vehicle state sensor 45 include a vehicle speed sensor that detects a vehicle speed, a shift position sensor that detects a shift position, and a brake switch that detects a brake operation.

The body ECU 46 is an electronic control device including, for example, a processor and a memory. The body ECU 46 locks and unlocks each door by outputting a drive signal for controlling locking and unlocking of each door of the vehicle to a door lock motor provided in each door. Further, a lock/unlock SW43 is connected to the body ECU 46, and a signal according to ON/OFF of the lock/unlock SW43 is acquired. In addition, the body ECU 46 is connected with a courtesy switch for each door, and acquires a signal from the courtesy switch according to opening/closing of each door.

The meter ECU 47 is an electronic control unit including, for example, a processor and a memory. The meter ECU 47 controls the operation of the meter display section and the warning section provided in the meter unit attached to the instrument panel. The meter display unit is a display unit that displays a traveling state such as a vehicle speed, an engine rotation speed, and a traveling distance. The warning unit is a notification unit that notifies various abnormalities, and may be a warning lamp or a buzzer.

The power unit ECU 48 is an electronic control device that controls a traveling drive source such as an internal combustion engine or a motor generator of the vehicle, and when the start permission signal of the traveling drive source is acquired from the verification ECU 40, the traveling drive source of the vehicle is started.

The smartphone key ECU 49 is an electronic control unit including, for example, a processor and a memory. As shown in FIG. 4, the smartphone key ECU 49 includes a smartphone key control unit 490 and a BLE communication unit 491, and executes processing related to the smartphone key system. The smartphone key ECU 49 is connected to the verification ECU 40 and the BLE module 50.

The BLE communication unit 491 is a communication module including, for example, an IC, an antenna, a communication circuit, and the like, and performs wireless communication according to BLE according to an instruction from the smartphone key control unit 490. The smartphone key control unit 490 is composed of, for example, a processor and a memory, and controls communication in the BLE communication unit 491.

According to an instruction from the verification ECU 40, the smartphone key control unit 490 causes the BLE communication unit 491 to periodically perform the polling (hereinafter, portable terminal detection polling) for transmitting the advertising information when the vehicle is parked. If there is no instruction from the verification ECU 40, the smartphone key control unit 490 does not cause the portable terminal detection polling to be performed. When this advertising information can be acquired by the communication module 31 of the mobile terminal 3, the connection between the communication module 31 and the BLE communication unit 491 is established, and information is transmitted and received. The smartphone key control unit 490 acquires, via the BLE communication unit 491, a code for code verification transmitted from the communication module 31 having a connection established with the BLE communication unit 491, and outputs the code to the verification ECU 40.

The BLE module 50 is a communication module capable of performing wireless communication according to BLE, and has the same configuration as the BLE communication unit 491. The BLE module 50 has an RSSI measurement circuit that measures the received signal strength (hereinafter, RSSI) of the radio wave received by the antenna. The BLE module 50 antennas this radio wave by sniffing (that is, interception) of the radio wave used for communication (that is, connection-type communication) in which a connection is established between the communication module 31 and the BLE communication unit 491. To receive and measure RSSI. That is, the BLE module 50 measures the RSSI of the radio wave transmitted from the mobile terminal 3 without establishing a connection with the mobile terminal 3.

The BLE modules 50 are provided at a plurality of locations on the vehicle and measure the RSSI of the radio wave transmitted from the mobile terminal 3 at each installation location. As an example, a plurality of BLE modules 50 may be provided from the front to the rear of the left and right side surfaces of the vehicle. Then, the BLE module 50 outputs the measured RSSI to the smartphone key control unit 490. Since RSSI has a distance attenuation characteristic, the position of the mobile terminal 3 with respect to the vehicle can be determined from the RSSI measured by the BLE modules 50 provided at a plurality of locations of the vehicle. The RSSI measured by the BLE modules 50 provided at a plurality of locations in the vehicle is sent to the verification ECU 40 via the smartphone key control unit 490, and is used by the verification ECU 40 to determine the position of the mobile terminal 3 with respect to the vehicle.

The verification ECU 40 includes, for example, a processor, a memory, an I/O, and a bus connecting these, and executes various processes related to vehicle authentication by executing a control program stored in the memory. The memory mentioned here is a non-transitory tangible storage medium that non-temporarily stores computer-readable programs and data. The non-transitional physical storage medium is realized by a semiconductor memory, a magnetic disk, or the like. This verification ECU 40 corresponds to an in-vehicle device. The details of the verification ECU 40 will be described below.

<Schematic configuration of BCM40>
Here, an example of a schematic configuration of the BCM 40 will be described with reference to FIG. As shown in FIG. 5, the BCM 40 includes a vehicle state determination unit 401, a request unit 402, a response acquisition unit 403, a mobile information acquisition unit 404, a storage unit 405, an authentication unit 406, an inside/outside determination unit 409, a permission unit 410, and an alarm instruction. The unit 411, the counting unit 412, and the restriction processing unit 413 are provided as functional blocks.

The vehicle state determination unit 401 determines the vehicle state based on the sensing result regarding the vehicle state detected by the vehicle state sensor 45. For example, whether or not the vehicle is parked is determined based on the vehicle speed detected by the vehicle speed sensor, the shift position detected by the shift position sensor, and the like. In addition, it is determined based on the signal from the brake switch whether the vehicle is being braked.

The request unit 402 requests the LF transmitter 41 to transmit a request signal or transmits the advertising information to the smartphone key ECU 49 in accordance with the signal input from the body ECU 46, the vehicle state determined by the vehicle state determination unit 401, and the like. Request or The request unit 402 requests the transmission of the request signal from the LF transmitter 41 and the transmission of the advertising information from the smartphone key ECU 49 until the request is limited by the restriction processing unit 413 described later.

An example of a request to the LF transmitter 41 will be described below. For example, the request unit 402 causes the LF transmitter 41 to sequentially transmit request signals from a plurality of vehicle exterior antennas when the vehicle power is off and all the doors of the vehicle are locked. Make a request. In accordance with this request, the LF transmitter 41 causes polling (hereinafter, electronic key detection polling) to sequentially transmit request signals from a plurality of vehicle exterior antennas in order. Hereinafter, a series of processes from the electronic key detection polling to the code verification using the code transmitted in response to the electronic key detection polling is referred to as vehicle exterior verification for unlocking with the electronic key 2. And The request signal transmitted by the electronic key detection polling may be a wake signal, and when the electronic key 2 responds to the wake signal, a challenge signal may be transmitted to suppress the amount of current used for polling. Good.

In addition, it is preferable that the cycle of periodically transmitting the request signal in the electronic key detection polling is shorter than the cycle of periodically transmitting the request signal in the portable terminal detection polling. In the following, a case where the cycle of periodically transmitting the request signal in the electronic key detection polling is shorter than the cycle of periodically transmitting the request signal in the portable terminal detection polling will be described as an example.

Further, the request unit 402 transmits the LF so that the request signal is transmitted from the vehicle interior antenna when the start SW 44 is operated while the vehicle state determination unit 401 determines that the vehicle brake operation is performed. Request to the container 41. According to this request, the LF transmitter 41 causes the vehicle interior antenna to transmit a request signal. The request signal may be transmitted by polling that is periodically transmitted. Hereinafter, a series of processes from the transmission of the request signal from the vehicle interior antenna to the code verification using the code transmitted in response to the request signal will be referred to as vehicle interior verification for starting with the electronic key 2. I shall call it. The request unit 402 may determine that the start SW 44 has been operated from the signal of the start SW 44.

Further, the request unit 402 outputs request signals sequentially from the vehicle exterior antenna and the vehicle interior antenna when the lock/unlock SW43 is operated in a state where the power supply state of the vehicle is off and there is an unlocked door. Send it. The request signal may be transmitted by polling that is periodically transmitted. After that, a series of processes from the transmission of the request signal from the vehicle exterior antenna and the vehicle interior antenna to the code verification using the code transmitted in response to the request signal are performed to lock the electronic key 2. This is referred to as vehicle interior/outdoor verification. Note that the vehicle exterior antenna that transmits the request signal may be limited to the vehicle exterior antenna located at a position corresponding to the operated locking/unlocking SW 43. The operation of the lock/unlock SW43 may be determined by the request unit 402 from the signal of the lock/unlock SW43 acquired via the body ECU 46.

In addition, the request unit 402 causes the vehicle exterior antenna and the vehicle interior antenna to sequentially transmit request signals when the vehicle is parked and the door of the vehicle is opened and closed. The request signal may be transmitted by polling that is periodically transmitted. In the following, a series of processes from the transmission of request signals from the vehicle exterior antenna and the vehicle interior antenna to the code collation using the code transmitted in response to the request signal are performed to prevent the electronic key 2 from being taken out. This is referred to as vehicle interior/outdoor verification. It should be noted that the request unit 402 may determine that the door is opened or closed from the signal of the door courtesy switch acquired via the body ECU 46.

Next, an example of a request to the smartphone key ECU 49 will be described below. For example, the request unit 402 requests the smartphone key ECU 49 to cause the BLE communication unit 491 to periodically transmit the advertisement information when the power supply state of the vehicle is off and all the doors of the vehicle are locked. To do. According to this request, the smartphone key ECU 49 causes mobile terminal detection polling, which is polling for periodically transmitting the advertisement information from the BLE communication unit 491. Hereinafter, a series of processes from the mobile terminal detection polling to the code verification using the code transmitted in response to the mobile terminal detection polling will be referred to as vehicle interior/exterior verification for unlocking the mobile terminal 3. I shall. The advertisement information corresponds to the information for communication connection with the mobile terminal 3.

Further, the request unit 402 transmits information requesting a code from the BLE communication unit 491 when the start SW 44 is operated in a state where the vehicle state determination unit 401 determines that the vehicle is being braked. A request is made to the smartphone key ECU 49 to cause it. In accordance with this request, the smartphone key ECU 49 causes the BLE communication unit 491 to transmit information requesting a code to the mobile terminal 3. Hereinafter, a series of processes from the request for the code from the BLE communication unit 491 to the code verification using the code transmitted in response to the request will be referred to as the vehicle interior/exterior verification for starting the mobile terminal 3. I shall call it. When the connection between the BLE communication unit 491 and the mobile terminal 3 needs to be reestablished, the advertisement information may be periodically transmitted as the code request information. The same applies to the subsequent steps.

Further, the request unit 402 causes the BLE communication unit 491 to transmit the information requesting the code when the lock/unlock SW43 is operated in the state where the power supply state of the vehicle is off and there is an unlocked door. Request to the smartphone key ECU 49. In accordance with this request, the smartphone key ECU 49 causes the BLE communication unit 491 to transmit information requesting a code to the mobile terminal 3. Hereinafter, a series of processes from the request for the code from the BLE communication unit 491 to the code verification using the code transmitted in response to this request will be referred to as the vehicle interior/exterior verification for locking the mobile terminal 3. I shall call it.

The response acquisition unit 403 acquires, via the RF receiver 42, the response signal including the encryption code, which is transmitted from the electronic key 2 that has received the request signal transmitted from the LF transmission antenna. The mobile information acquisition unit 404 acquires the code transmitted from the mobile terminal 3 that has received the advertisement information, via the smartphone key ECU 49. The storage unit 405 is, for example, an electrically rewritable non-volatile memory, and stores information for authentication. For example, as information for authentication by code verification, a secret key used in the common key cryptosystem is stored, or a code as regular vehicle key information is stored.

The authentication unit 406 includes an electronic key matching unit 407 and a mobile phone matching unit 408, and performs authentication by code matching. The electronic key matching unit 407 obtains the encryption code included in the response signal acquired by the response acquisition unit 403 and the code of the challenge signal transmitted from the LF transmission antenna by encrypting the code with the secret key stored in the storage unit 405. Code matching with the encrypted code that is performed is performed. The result of success or failure of code collation is output to the permission unit 410. The code verification in the electronic key verification unit 407 is referred to as authentication using the electronic key 2.

The mobile phone collating unit 408 carries out code collation between the code acquired by the mobile information acquiring unit 404 and the code stored in the storage unit 405 as the regular key information of the vehicle. The result of success or failure of code collation is output to the permission unit 410. The code matching in the mobile phone collating unit 408 is the authentication using the mobile terminal 3. In the authentication unit 406, authentication is performed by the authentication that uses the electronic key 2 or the mobile terminal 3 that has the first code collation until it is restricted by the restriction processing unit 413 described below. Shall be given.

In the present embodiment, an example will be described in which the code used for code matching is different between the smart entry system and the smartphone key system, but the present invention is not limited to this. For example, the smart entry system and the smartphone key system may have a common code used for code matching.

The inside/outside determination unit 409 determines whether the electronic key 2 is located inside or outside the vehicle, or determines whether the portable terminal 3 is located inside or outside the vehicle. The inside/outside determination unit 409, when the response signal transmitted from the electronic key 2 is acquired by the response acquisition unit 403 via the RF receiver 42 in response to the request signal transmitted from the vehicle interior antenna, the electronic key 2 is located in the vehicle compartment. The inside/outside determination unit 409 receives the response signal transmitted from the electronic key 2 by the response acquisition unit 403 via the RF receiver 42 in response to the request signal transmitted from the vehicle exterior antenna. 2 is determined to be located outside the vehicle compartment.

Further, the inside/outside determination unit 409 acquires the code transmitted from the mobile terminal 3 by the mobile information acquisition unit 404 via the smartphone key ECU 49 in response to the advertisement information transmitted from the BLE communication unit 491 of the smartphone key ECU 49. In this case, it is determined whether the portable terminal 3 is located inside or outside the vehicle. Specifically, the inside/outside determination unit 409 identifies the position of the mobile terminal 3 with respect to the vehicle, from the magnitude of the RSSI measured by the BLE modules 50 provided at a plurality of locations of the vehicle and the RSSI distance attenuation characteristic acquired from the smartphone key ECU 49. Then, it is determined whether the mobile terminal 3 is located inside or outside the vehicle. The determination result of the inside/outside determination unit 409 is output to the permission unit 410.

In the vehicle exterior verification for unlocking with the electronic key 2, the permission unit 410 determines that the electronic key verification unit 407 has performed verification, and the inside/outside determination unit 409 determines that the electronic key 2 is located outside the vehicle interior. In this case, a signal that permits unlocking of each door of the vehicle is sent to the body ECU 46. When the body ECU 46 detects that the locking/unlocking SW 43 is operated while unlocking each door is allowed, it outputs a drive signal to the door lock motor to automatically unlock each door.

In the vehicle interior verification for starting with the electronic key 2, the permission unit 410 determines that the electronic key verification unit 407 has successfully performed verification, and the inside/outside determination unit 409 determines that the electronic key 2 is located in the vehicle interior. First, a start permission signal for the vehicle drive source is sent to the power unit ECU 48. When the power unit ECU 48 acquires the start permission signal, the power unit ECU 48 starts the traveling drive source.

In the vehicle interior/exterior collation for locking with the electronic key 2, the permission unit 410 determines that the electronic key collation unit 407 has succeeded, and the interior/external determination unit 409 determines that the electronic key 2 is located outside the vehicle interior. In this case, a signal for permitting locking of each door of the vehicle is sent to the body ECU 46. The body ECU 46 outputs a drive signal to the door lock motor to automatically lock each door when detecting that the locking/unlocking SW 43 is operated in a state in which each door is locked.

In the vehicle interior/exterior collation for unlocking the mobile terminal 3, the permission unit 410 determines that the mobile collation unit 408 has succeeded, and the inside/outside determination unit 409 determines that the mobile terminal 3 is located outside the vehicle cabin. In this case, a signal that permits unlocking of each door of the vehicle is sent to the body ECU 46.

In the vehicle interior verification for starting with the mobile terminal 3, the permission unit 410 determines that the mobile verification unit 408 has successfully verified and the inside/outside determination unit 409 determines that the mobile terminal 3 is located in the vehicle interior. , Sends a start permission signal for the vehicle drive source to the power unit ECU 48.

In the vehicle interior/exterior collation for locking with the mobile terminal 3, the permission unit 410 determines that the mobile collation unit 408 has established the collation, and the inside/outside determination unit 409 determines that the mobile terminal 3 is located outside the vehicle interior. Then, a signal for permitting locking of each door of the vehicle is sent to the body ECU 46.

The permitting unit 410 executes, for example, the smart entry system or the smartphone key system, whichever is the first one to be verified, until the restriction processing unit 413 described later stops either the smart entry system or the smartphone key system. Allow unlocking and start.

The alarm instructing unit 411 determines that the electronic key collating unit 407 has succeeded in collating the inside and outside of the vehicle to prevent the electronic key 2 from being taken out, and the inside/outside determining unit 409 determines that the electronic key 2 is located outside the vehicle. In this case, the meter ECU 47 is instructed to output an alarm for carrying out prevention. As an example of the alarm for preventing carry-out, a buzzer sound may be output or a warning lamp may be turned on. The prevention of carry-out here means prevention of carry-out of the electronic key 2 to the outside of the vehicle compartment after the traveling drive source of the vehicle is started.

Further, the alarm instructing unit 411 determines that the electronic key collating unit 407 performs the collation in the vehicle interior/exterior collation for locking the electronic key 2, and the electronic key 2 is located in the vehicle interior by the inside/outside determination unit 409. If so, the meter ECU 47 is instructed to output an alarm for preventing the electronic key 2 from being locked in the vehicle interior. As an example of the alarm for preventing carry-out, a buzzer sound may be output or a warning lamp may be turned on.

The counting unit 412 uses the electronic key 2 for the authentication in the authentication unit 406 (hereinafter, the number of times the electronic key is used) and the number of times the mobile terminal 3 is used in the authentication in the authentication unit 406 (hereinafter, the number of times the mobile terminal is used. ) And each count. The number of times the electronic key has been used can be restated as the number of times the smart entry system has been used for authentication by the authentication unit 406. The number of times the mobile terminal is used can be rephrased as the number of times the smartphone key system is used for authentication by the authentication unit 406.

When the permitting unit 410 uses the electronic key 2 for the authentication when permitting the locking of the vehicle door after the permitting unit 410 permits the unlocking of the vehicle door, The portable terminal 3 is also used for counting the number of times the electronic key is used and for authentication when permitting the locking of the vehicle door by the permitting unit 410, following authentication when permitting the unlocking of the vehicle door by the permitting unit 410. In this case, it is preferable to count the number of times the mobile terminal is used. According to this, even if the collation for unlocking is performed a plurality of times when the user gets on the vehicle, it is possible to make one count for each trip of the user, and count according to the actual number of times the vehicle is used. It will be possible to do.

The restriction processing unit 413 stops one of the smart entry system and the smartphone key system according to the result of counting by the counting unit 412. When the smart entry system is stopped, the request unit 402 may stop the request from the LF transmitter 41 to send a request signal to the electronic key 2. As a result, the electronic key detection polling is also stopped. When stopping the smartphone key system, the request unit 402 may stop the smartphone key ECU 49 from transmitting a request for information transmission to the mobile terminal 3. As a result, the mobile terminal detection polling is also stopped. That is, the restriction processing unit 413 stops one of the electronic key detection polling and the mobile terminal detection polling according to the result counted by the counting unit 412. The restriction processing unit 413 may stop the smart entry system by turning off the power of the LF transmitter 41, or may stop the smartphone key system by turning off the power of the smartphone key ECU 49.

As an example, the restriction processing unit 413, when the number of times the electronic key has been used is counted first by the counting unit 412 and the number of times the mobile terminal has been used, the smartphone key system is used. On the other hand, the smart entry system may be stopped when the cumulative number of times the mobile terminal has been used reaches or exceeds the specified value. The specified value referred to here is a plurality that can be set arbitrarily.

However, in a vehicle in which the frequency of use of the smart entry system and that of the smartphone key system are competing with each other, if the condition that the system is stopped is that the number of times of counting in the counting unit 412 is equal to or greater than the specified value, the latest Even if the system is not used frequently, it may be stopped. In this case, there is a possibility that a lot of trouble is required to release the stop.

Therefore, when the count of the number of times the electronic key is used in the counting unit 412 continues for a specified number or more, the restriction processing unit 413 stops the smartphone key system, while the counting unit 412 counts the number of times the mobile terminal is used in the specified number. In the case of continuous above, it is preferable that the smart entry system is stopped. Here, the specified number is a predetermined number of times and can be arbitrarily set. For example, when the number of times of using the electronic key is counted once and then the number of times of using the mobile terminal is counted once, the number of consecutive times of using the electronic key is 0, and the number of times of using the portable terminal is consecutive. The number of times is 1. If neither the number of times the electronic key has been used in the counting unit 412 nor the number of times the mobile terminal has been used reaches the specified number of consecutive states, neither the smart entry system nor the smartphone key system is stopped. That is, neither the electronic key detection polling nor the mobile terminal detection polling is stopped.

According to this, in a vehicle in which the smart entry system and the smartphone key system are frequently used, it is difficult to continuously use one of the systems, and thus it is easy to continue to use both systems together. In vehicles where the frequency of use of the smart entry system and the smartphone key system is competitive, even if both systems are used together, there is little waste in using them together. Further, according to the above configuration, in a vehicle in which the usage frequency of the smart entry system and the smartphone key system is biased to one side, it is possible to stop the system that is used less frequently and reduce waste.

Note that the counting unit 412 may be configured to reset the number of times the electronic key is used and the number of times the mobile terminal is used when the limit processing unit 413 stops either the smart entry system or the smartphone key system.

Even when the restriction processing unit 413 stops either the smart entry system or the smartphone key system, that is, even when the polling of either the mobile terminal detection polling or the electronic key detection polling is stopped. It is preferable to cancel the stop by a predetermined trigger and restart the polling. As an example, the restriction processing unit 413 releases the stop when the locking/unlocking SW 43 is turned on in a state where the permission unit 410 does not perform the authentication for permitting the unlocking of the vehicle door. The locking/unlocking SW 43 corresponds to the switch of the vehicle operated by the user when getting on the vehicle.

According to this, if you try to get in with a device used as a key in a stopped system instead of a device used as a key in a system that is not stopped, the stopped system will be released and a new It will be possible to restart polling for the device used as the key.

The restriction processing unit 413 first detects the vehicle until the smart entry system or the smartphone key system is stopped, that is, the mobile terminal detection polling or the electronic key detection polling is stopped. While the polling on the side used for authentication when permitting the unlocking of the door is not suspended, the polling on the side not used for that authentication is temporarily suspended until the vehicle door is locked. It is preferable to suspend the polling and release the suspension after permitting the locking of the vehicle door. According to this, even if the authentication is established in one of the smart entry system and the smartphone key system, it is possible to eliminate the waste of continuing polling in the other system. This makes it possible to suppress an increase in dark current of the vehicle due to useless polling.

The alarm instructing unit 411 may be configured not to issue an alarm to the user of the electronic key 2 when the smart processing is stopped by the restriction processing unit 413, that is, when the electronic key detection polling is stopped. An example of the alarm for the user of the electronic key 2 is the above-mentioned alarm for preventing the smart entry from being taken out.

According to this, when the user is using the vehicle by authenticating with the mobile terminal 3 instead of the electronic key 2, the user of the electronic key 2 does not need to be alarmed, but the troublesome operation is performed. It becomes possible to prevent it. For example, when the user is using the vehicle by authenticating with the mobile terminal 3 instead of the electronic key 2, the electronic key 2 is not in the vehicle compartment, and thus the above-mentioned alarm for preventing the smart entry from being taken out is issued. However, it is possible to prevent such a useless alarm.

<Combination-related processing in collation ECU 40>
Next, an example of the flow of processing (hereinafter, combination-related processing) related to the combined use of the smart entry system and the smartphone key system in the verification ECU 40 will be described with reference to the flowchart of FIG. 6. The flowchart of FIG. 6 may be configured to start when the power supply of the verification ECU 40 is turned on and to end when the power supply of the verification ECU 40 is turned off. The verification ECU 40 may be configured to operate with the backup power source even when the vehicle power is off. In the flowchart of FIG. 6, it is assumed that both the smart entry system and the smartphone key system are operating by default.

First, in step S1, the smart entry system and the smartphone key system are also used for the authentication when permitting the unlocking of the vehicle door by the permitting unit 410 and the authentication when permitting the locking of the vehicle door by the permitting unit 410. If the same system is used (YES in S1), the process proceeds to step S2. On the other hand, if the same system is not used (NO in S1), the process proceeds to step S3.

In step S2, the permission unit 410 counts. When the smart entry system is also used for authentication when permitting the locking of the vehicle door by the permitting unit 410 following the authentication when permitting the unlocking of the vehicle door by the permitting unit 410, the electronic key is used. Count the number of uses. On the other hand, in the case where the smartphone key system is also used for the authentication when permitting the unlocking of the vehicle door by the permitting unit 410 and the authentication when permitting the locking of the vehicle door by the permitting unit 410, Count the number of times the mobile terminal is used.

In step S3, when the count of the number of times the electronic key has been used continues for the specified number or more (YES in S3), the process proceeds to step S4. On the other hand, if the count of the number of times the electronic key has been used has not reached the specified number of consecutive times (NO in S3), the process proceeds to step S5. In step S4, the restriction processing unit 413 stops the smartphone key system, and proceeds to step S7.

In step S5, if the count of the number of times the mobile terminal has been used continues for the specified number or more (YES in S5), the process proceeds to step S6. On the other hand, when the count of the number of times the mobile terminal has been used has not reached the specified number of consecutive times (NO in S5), the process returns to S1 and is repeated. In step S6, the restriction processing unit 413 stops the smart entry system, and proceeds to step S7.

In step S7, if the unlocking SW 43 is turned on (YES in S7) while the authorization unit 410 has not performed authentication to permit unlocking of the vehicle door, the process proceeds to step S8. On the other hand, when the unlocking SW 43 is not turned on (NO in S7) in a state in which the authorization unit 410 does not authenticate when unlocking the vehicle door, the process of S7 is repeated. In step S8, the restriction processing unit 413 releases the stopped system of the smart entry system and the smartphone key system, and returns to S1 to repeat the process.

Here, the outline of the processing in the verification ECU 40 when the electronic key 2 is used as the vehicle key and when the portable terminal 3 is used will be described with reference to FIGS. 7 and 8. FIG. 7 shows an example in which the user uses the mobile terminal 3 as a key for the vehicle. FIG. 8 shows an example in which the user uses the electronic key 2 as a key for the vehicle.

As shown in FIG. 7, when the user uses the mobile terminal 3 as the key of the vehicle, the user does not carry the electronic key 2. Therefore, if the user continues to use the mobile terminal 3 as the key of the vehicle, the number of times the mobile terminal is used is continuously counted. When the count of the number of times the mobile terminal is used continues for a predetermined number or more, the restriction processing unit 413 stops the smart entry system. As a result, the operation of the smartphone key system is continued, while the operation of the smart entry system is stopped. As a result, the portable terminal detection polling is performed, but the electronic key detection polling is not performed.

As shown in FIG. 8, when the user uses the electronic key 2 as the key of the vehicle, the user may not carry the mobile terminal 3, but may also carry the mobile terminal 3. When the user does not carry the mobile terminal 3, if the user continues to use the electronic key 2 as the key of the vehicle, the number of times of using the electronic key is continuously counted. Even when the user carries the mobile terminal 3 as well, the cycle of the electronic key detection polling is shorter than the cycle of the mobile terminal detection polling, so that the frequency of authentication in the smart entry system increases. Therefore, even when the user carries the mobile terminal 3 as well, the number of times of using the electronic key is continuously counted. When the count of the number of times the electronic key has been used continues for a prescribed number or more, the restriction processing unit 413 stops the smartphone key system. As a result, the operation of the smart entry system is continued, while the operation of the smartphone key system is stopped. As a result, the electronic key detection polling is performed, but the mobile terminal detection polling is not performed.

<Summary of Embodiment 1>
According to the configuration of the first embodiment, the authentication unit 406 can perform both the authentication by the function of the smart entry system and the authentication by the smartphone key system. The vehicle door is locked and unlocked based on the successful authentication. Therefore, in the vehicle authentication system 1, the electronic key 2 and the mobile terminal 3 can be used together as a key. Also, the counting unit counts the number of times the electronic key 2 has been used for the authentication in the authentication unit 406, which is the number of times the electronic key has been used, and the number of times the mobile terminal 3 has been used, that is, the number of times the mobile terminal 3 has been used for the authentication in the authentication unit 406. According to the result of counting at 412, the polling of the side of the electronic key 2 and the mobile terminal 3 which is not used by the user is stopped. Therefore, as compared with the case where neither the electronic key detection polling nor the portable terminal detection polling is stopped, it is possible to suppress an increase in dark current of the vehicle due to polling. In addition, since polling on the side more used by the user is not stopped, it is possible to improve responsiveness until unlocking is permitted. As a result, even when the electronic key 2 and the mobile terminal 3 can be used as a key in the vehicle authentication system 1, the responsiveness until unlocking is increased and the increase in dark current of the vehicle is suppressed. It will be possible.

(Embodiment 2)
In the first embodiment, an example in which the verification ECU 40 and the body ECU 46 are separate bodies has been described, but the invention is not limited to this. For example, the verification ECU 40 may be configured to include the function of the body ECU 46. In other words, the body ECU 46 may be integrated with the verification ECU 40.

It should be noted that the present disclosure is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and are obtained by appropriately combining the technical means disclosed in the different embodiments. Embodiments are also included in the technical scope of the present disclosure. Further, the control unit and the method thereof described in the present disclosure may be realized by a dedicated computer that constitutes a processor programmed to execute one or a plurality of functions embodied by a computer program. Alternatively, the apparatus and method described in the present disclosure may be realized by a dedicated hardware logic circuit. Alternatively, the device and the method described in the present disclosure may be realized by one or more dedicated computers configured by a combination of a processor that executes a computer program and one or more hardware logic circuits. Further, the computer program may be stored in a computer-readable non-transition tangible recording medium as an instruction executed by the computer.

1 vehicle authentication system, 2 electronic key, 3 mobile terminal, 4 vehicle side unit, 40 verification ECU (on-vehicle device), 41 LF transmitter, 42 RF receiver, 43 lock/unlock SW (switch), 49 smartphone key ECU, 406 authentication Section, 407 electronic key collating section, 408 mobile collating section, 409 inside/outside determining section, 410 permitting section, 411 alarm instructing section, 412 counting section, 413 restriction processing section

Claims (5)

Used in vehicles,
Any of authentication via the first wireless communication with the electronic key (2) and authentication via the second wireless communication with the portable terminal (3) other than the electronic key. An authentication unit (406) that can also be used,
An in-vehicle device comprising: a permitting unit (410) for permitting locking and unlocking of the door of the vehicle based on the fact that the authentication is established by the authenticating unit,
For authentication through the first wireless communication, electronic key detection polling in which a request signal requesting a response to the electronic key is periodically transmitted from the vehicle is performed,
For authentication through the second wireless communication, mobile terminal detection polling is performed in which information for communication connection with the mobile terminal is periodically transmitted from the vehicle,
A count for counting the number of times the electronic key is used, which is the number of times the electronic key is used for authentication in the authentication unit, and the number of times the mobile terminal is used, which is the number of times the mobile terminal is used for authentication in the authentication unit. Part (412),
An in-vehicle device comprising: a restriction processing unit (413) for stopping one of the electronic key detection polling and the mobile terminal detection polling according to the result of counting by the counting unit. In the case where the electronic key is also used for the authentication when the permitting unit permits the locking of the vehicle door subsequently to the authentication when the permitting unit permits the unlocking of the vehicle door. In addition, the number of times the electronic key is used is counted, and the authentication when permitting the unlocking of the vehicle door by the permission unit is followed by the authentication when permitting the locking of the vehicle door by the permission unit. The in-vehicle apparatus according to claim 1, wherein the number of times the mobile terminal is used is counted when the mobile terminal is used. The limit processing unit stops the portable terminal detection polling when the count of the number of times the electronic key is used by the counting unit continues for a predetermined number of times, while counting the number of times the portable terminal is used by the counting unit. The vehicle-mounted device according to claim 1 or 2, wherein the electronic key detection polling is not stopped when is repeated for a predetermined number of times. Even when the restriction processing unit stops polling of either the portable terminal detection polling or the electronic key detection polling, the authentication when the unlocking of the vehicle door is permitted by the permission unit is performed. The polling, which has been stopped, is restarted when the switch (43) of the vehicle operated by the user when getting on the vehicle is turned on in a state where the polling is not performed. The in-vehicle device according to the item. The restriction processing unit until the polling of any one of the mobile terminal detection polling and the electronic key detection polling is stopped, the side of the side used for the authentication when the unlocking of the door of the vehicle is permitted first. While the polling is not suspended, the polling on the side not used for the authentication is temporarily suspended until the locking of the vehicle door is permitted, and then suspended after permitting the locking of the vehicle door. The vehicle-mounted device according to any one of claims 1 to 4, wherein the in-vehicle device is released.

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