JP6409228B2 - Mobile device authentication system, vehicle-mounted device and mobile device - Google Patents

Description

  The present invention relates to a portable device authentication system, an in-vehicle device, and a portable device.

  Conventionally, in a small vehicle (vehicle) such as a motorcycle, a portable device authentication system for authenticating a portable device for driving a device to be controlled such as locking, unlocking, engine starting, etc. without using a mechanical key. There is. The vehicle-mounted device in the portable device authentication system is provided on the vehicle side, and communicates authentication information with the portable device. The in-vehicle device controls to restrict the use of the device, and when it is determined that the authentication with the portable device can be properly performed, the device corresponding to various control targets such as locking, unlocking, engine starting, etc. in the vehicle Drive.

  By the way, in the case of a small vehicle such as a motorcycle, unlike the case of an automobile or the like, the capacity of a battery mounted on the vehicle is limited. Therefore, in the above-described small vehicle, a state in which authentication cannot be performed due to battery exhaustion or the like may occur. A technique for performing communication between the vehicle-mounted device and the portable device using the power obtained by the power generation by the kick operation when the battery runs out is known (for example, Patent Document 1). reference).

  According to Patent Document 1, on the vehicle side, the power obtained by the kick operation is supplied to the vehicle-mounted device to cause the portable device authentication circuit to function. On the portable device side, the transmission button of the portable device is used. In response to the operation, data for identifying the portable device is transmitted, and the portable device is verified by unidirectional communication. Further, it is disclosed that the handle lock is released and the main relay is turned on (engine start state) by repeating the kick operation after the portable device is authenticated by the above verification.

  As a related portable device authentication system, one that can use a plurality of portable devices for one automobile is known (see, for example, Patent Document 2).

JP 2002-370621 A JP 2003-239588 A

  However, generally, the power that can be obtained by one kick operation in a small vehicle is limited. For this reason, it is difficult to maintain a voltage that can drive an actuator or function a circuit for a long time after a kick operation is performed in a small vehicle. According to Patent Document 1, it is necessary to perform a plurality of kick operations before the main relay is turned on (engine start).

  Patent Document 2 discloses a technique applied to an automobile, and can be obtained at least by a portable device authentication process and a kick operation when there is a state where authentication cannot be performed due to battery exhaustion or the like. A technical idea related to authentication processing of a portable device using electric power is not disclosed. Even if the portable device described in the above document is used, it is difficult to remove the restriction on the use of the device related to the vehicle-mounted device of the small vehicle.

  The present invention has been made in consideration of such circumstances, and a portable device authentication system, an in-vehicle device, and a portable device that improve convenience when the use restriction of the device related to the on-vehicle device is canceled using the portable device. Is one of the purposes.

The portable device authentication system of the present invention employs the following configuration.
(1) A portable device authentication system comprising an on-vehicle device and one or more portable devices corresponding to the on-vehicle device, wherein the on-vehicle device holds identification information of the corresponding one or more portable devices. A storage unit, a transmission unit that transmits a request signal, a reception unit that receives an answer signal from at least one portable device corresponding to the transmission of the request signal, a request detection unit that detects a request transmission of the request signal, When the first request signal to be transmitted including the identification information of the specific portable device and the authentication processing data is in a first communicable state, and the request signal transmission request is detected, the data is retained. The first request signal corresponding to the identification information being transmitted is sequentially transmitted, the first request signal cannot be transmitted, the communication is disabled, and the generator that supplies power to the vehicle-mounted device is driven. Based on the result of decoding the received answer signal and a transmission control unit for transmitting a second request signal for searching and authenticating the specific portable device when the second communicable state is set by the kick actuating means. A determination unit that determines whether or not the portable device corresponding to the answer signal corresponds to the on-vehicle device within a period in which the second communicable state continues.

  According to this configuration, the request detection unit detects a request signal transmission request. When the transmission control unit is in a first communicable state capable of transmitting a first request signal to be transmitted including identification information of a specific portable device and authentication processing data, and a transmission request for the request signal is detected The first request signal corresponding to the held identification information is sequentially transmitted, and the first request signal cannot be transmitted and is in a communication impossible state, and the generator that supplies power to the on-vehicle device is driven. When the second communicable state is set by the kick actuating means, a second request signal for searching for and authenticating the specific portable device is transmitted. The determination unit determines whether or not the portable device corresponding to the answer signal corresponds to the vehicle-mounted device based on the decoding result of the received answer signal within a period during which the second communicable state continues. Can be determined.

(2) The second request signal includes data that causes the specific portable device to respond to the answer signal. The length of the second request signal that includes data that causes the answer signal to respond is the first request signal. It may be shorter than the length of.
According to this configuration, the length of the second request signal is shorter than the length of the first request signal, so that the time until the use restriction of the device related to the vehicle-mounted device is canceled using the portable device is reduced. Can be shortened.

(3) The length of the second request signal is a period corresponding to the one kick operation during the process until the search for one or more portable devices corresponding to the on-vehicle device, the authentication, and the unlocking of the controlled object. The length may be determined so as to end within.
According to such a configuration, the length of the second request signal corresponds to the process of searching for one or a plurality of portable devices corresponding to the on-vehicle device, authentication, and unlocking the controlled object corresponds to the one kick operation. Since it is determined to end within the period to be used, it is possible to shorten the time until the use restriction of the device related to the vehicle-mounted device is canceled using the portable device.

(4) The transmission control unit transmits a portable device search signal for searching for one portable device of the plurality of portable devices as the second request signal, and then receives an answer signal from the portable device. If the answering signal from the portable device is not received within a predetermined time, the portable device searcher searches for another portable device among the plurality of portable devices. A process of transmitting a signal as another second request signal and waiting for reception of an answer signal from the portable device is repeated a number of times determined based on the number of portable devices corresponding to the vehicle-mounted device, and the answer signal Is received, the verification signal including at least the authentication code is transmitted to the portable device that has transmitted the answer signal, and the data length is longer than that of the portable device search signal. The machine receives the transmitted main verification signal, transmits a main verification answer signal corresponding to the main verification signal, the receiving unit receives the main verification answer signal, and the determination unit You may make it authenticate the said portable machine based on this collation answer signal.
According to this configuration, when the answer signal from the portable device is not received within a predetermined time, another portable device search signal for searching for another portable device among the plurality of portable devices is provided. The process of waiting for reception of the answer signal from the portable device is repeated for the number of times determined based on the number of portable devices corresponding to the vehicle-mounted device. It is possible to shorten the time until the use restriction of the device related to the vehicle-mounted device is released using the machine.

(5) When the transmission control unit does not receive the answer signal even when the search for the portable device has been repeated a predetermined number of times, the transmission control unit sends the portable device search signal to a predetermined portable device. The verification data may be transmitted with a longer data length and at least including an authentication code.
According to such a configuration, when the answer signal is not received even in the stage where the portable device search is repeated a predetermined number of times, the data length of the predetermined portable device is longer than the portable device search signal. Since this verification signal including at least an authentication code is transmitted, a portable device corresponding to the vehicle-mounted device can be efficiently authenticated.

The vehicle-mounted device of the present invention employs the following configuration.
(6) A vehicle-mounted device of a portable device authentication system that authenticates one or more portable devices, a storage unit that holds identification information of the one or more portable devices, a transmission unit that transmits a request signal, and the request Including a receiving unit for receiving an answer signal from at least one portable device corresponding to signal transmission, a request detecting unit for detecting a request signal transmission request, identification information of a specific portable device, and authentication processing data The first request signal corresponding to the held identification information is sequentially transmitted when a request for transmitting the request signal is detected in the first communicable state where the first request signal to be transmitted can be transmitted. The first request signal cannot be transmitted, the communication is impossible, and the second communication enabled state is established by the kick actuating means that drives the generator that supplies power to the vehicle-mounted device. A transmission control unit that transmits a second request signal for searching for and authenticating the specific portable device, and a portable device corresponding to the answer signal based on a decoding result of the received answer signal. And a determination unit that determines whether or not the device corresponds to a device within a period in which the second communicable state continues.

  According to this configuration, the request detection unit detects a request signal transmission request. When the transmission control unit is in a first communicable state capable of transmitting a first request signal to be transmitted including identification information of a specific portable device and authentication processing data, and a transmission request for the request signal is detected The first request signal corresponding to the held identification information is sequentially transmitted, and the first request signal cannot be transmitted and is in a communication impossible state, and the generator that supplies power to the on-vehicle device is driven. When the second communicable state is set by the kick actuating means, a second request signal for searching for and authenticating the specific portable device is transmitted. The determination unit determines whether or not the portable device corresponding to the answer signal corresponds to the vehicle-mounted device based on the decoding result of the received answer signal within a period during which the second communicable state continues. Can be determined.

The portable device of the present invention has the following configuration.
(7) A portable device that is authenticated by the vehicle-mounted device described in any one of (1) to (4) above, and is any of the first request signal and the second request signal transmitted by the vehicle-mounted device. When it is determined that the portable device is a portable device corresponding to the vehicle-mounted device from the portable device receiver that receives the request signal including the portable device transmitter, the portable device transmitter that transmits the answer signal, and the received request signal And a portable device controller that transmits an answer signal corresponding to the received request signal.

According to this invention, in the portable device, the portable device receiving unit receives the request signal including either the first request signal or the second request signal transmitted by the vehicle-mounted device.
When the portable device control unit determines from the received request signal that the portable device is a portable device corresponding to the vehicle-mounted device, the portable device control unit transmits an answer signal corresponding to the received request signal from the portable device transmission unit. Let

  According to the present invention, it is possible to provide a portable device authentication system, a vehicle-mounted device, a portable device, and a portable device authentication method that improve convenience when the restriction on use of the device related to the vehicle-mounted device is released using the portable device.

It is a block diagram which shows the portable device authentication system 1 by one Embodiment. It is explanatory drawing which shows the frame structure of the 1st request signal transmitted by LF communication which concerns on one Embodiment. It is explanatory drawing which shows the frame structure of the 2nd request signal transmitted by LF communication which concerns on one Embodiment. It is a flowchart which shows the procedure of the process at the time of starting of the onboard equipment which concerns on one Embodiment. It is a flowchart which shows the procedure of the "authentication process for kick start" of the onboard equipment which concerns on one Embodiment. It is a flowchart which shows the procedure of the process of the portable device which concerns on one Embodiment. It is a timing chart which shows processing of portable machine attestation system 1 based on the 1st condition concerning one embodiment. It is a timing chart which shows processing of portable machine attestation system 1 based on the 2nd condition concerning one embodiment. It is a timing chart which shows processing of portable machine attestation system 1 based on the 3rd condition concerning one embodiment. It is a timing chart which shows processing of portable machine attestation system 1 based on the 4th condition concerning one embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  FIG. 1 is a configuration diagram showing a portable device authentication system 1. A portable device authentication system 1 shown in the figure is applied to a small vehicle or the like, and restricts the use of the small vehicle at the time of locking. The mobile device authentication system 1 can drive a device corresponding to a control target such as locking, unlocking, or starting an engine by authenticating the mobile device 200 without using a mechanical key.

  For example, a power unit P including an engine E and a transmission (not shown) is swingably supported on a body frame of a scooter V that is a small vehicle, and a rear wheel WF that is driven by the power unit P is a rear portion of the power unit P. Is pivotally supported. When the power unit P is in the locked state, driving is restricted (driving restricted state). A handle H is provided at the front of the body frame of the scooter V, and the handle H is supported via a connecting shaft so that the direction of the front wheel WR can be adjusted. When the handle H is in the locked state, the rotation of the connecting shaft is restricted by the handle lock portion 17. The handle lock unit 17 includes an actuator unit 18 including a mechanism that limits the rotation of the connecting shaft.

  The power unit P is provided with kick actuating means 7 that can drive the generator G included in the power unit P when the kick pedal 6 is depressed. For example, when the battery runs out, the scooter V can use the electric power obtained by generating power by the kick operation of the kick operation means 7.

  A battery B is mounted on the scooter V, and the starting method of the power unit P is switched according to the state of charge (terminal voltage) of the battery B.

  Electric power generated by the generator G is supplied to the battery B via the converter 8. When the engine E is being driven, the generator G is driven by the engine E. For example, the battery B is charged by the electric power output from the generator G by depressing the kick pedal 6 of the kick operating means 7. In this case, the converter 8 functions as a rectifier and a regulator.

  Furthermore, the electric power stored in the battery B may be supplied to the generator G, and the generator G may be used as a starter for the engine E. In this case, the converter 8 supplies power so that the generator G functions as a motor.

  In addition, ignition power (not shown) provided in the engine E is supplied from the ignition circuit 13 according to the state of the main relay (MRY) 12.

  By the way, for example, when it is verified that the portable device 200 is a legitimate device corresponding to the scooter V, the vehicle-mounted device 100 releases various restriction states. Various restriction states include locking of the handle H and driving restriction of the power unit P.

(Configuration of the vehicle-mounted device 100)
The vehicle-mounted device 100 includes a power supply unit 20, a control unit 30, a transmission unit 41, a reception unit 42, a drive circuit unit 43, an input circuit unit 44, a main switch state acquisition unit 45, and a main relay drive unit 46. With. Furthermore, the vehicle-mounted device 100 may be configured to include a starter driving unit 47.

  The power supply unit 20 uses the battery B or the generator G as a power source, stabilizes the terminal voltage of the battery B with reference to the voltage + Vreg, and supplies the stabilized voltage to each unit such as the control unit 30. Each unit such as the control unit 30 uses a stabilized DC voltage as a power source. The power supply unit 20 monitors the voltage drop below the predetermined threshold voltage VTH of the terminal voltage of the battery B, and outputs the detection result.

  The transmission unit 41 transmits a request signal for calling the portable device 200. A signal transmitted from the transmission unit 41 may be referred to as an LF signal. The request signal (LF signal) includes identification information that identifies the portable device 200.

  The receiving unit 42 receives a signal transmitted from the portable device 200 that receives an answer signal from at least one portable device 200 corresponding to the transmission of the request signal. A signal transmitted from the portable device 200 and received by the receiving unit 42 is referred to as an RF signal. The carrier frequency of the RF signal is relatively higher than the carrier frequency of the LF signal.

  The drive circuit unit 43 drives the actuator unit 18 while the main switch 11 is in a conductive state. The actuator unit 18 is included in the handle lock unit 17 that locks the handle H in order to disable traveling of the vehicle, and switches between locking and unlocking states of the handle lock unit 17.

  The input circuit unit 44 receives a signal from the activation switch 16.

  The main switch state acquisition unit 45 acquires the conduction state of the main switch 11 that can be turned on according to the operation of the occupant.

  The main relay drive unit 46 switches between the on state and the off state of the main relay 14 under the control of the control unit 30.

  The starter drive unit 47 supplies a drive signal for starting the power unit P under the control of the control unit 30. For example, the starter drive unit 47 supplies a drive signal when using the generator G as a starter of the engine E to the conversion unit 8.

  The control unit 30 includes a start control unit 31, a communication control unit 32, a determination unit 33, a drive control unit 34, and a storage unit 35. Some or all of the start control unit 31, the communication control unit 32, the determination unit 33, and the drive control unit 34 are software functions that function when a processor such as a CPU (Central Processing Unit) executes a program. Part. Some or all of these may be hardware function units such as LSI (Large Scale Integration) and ASIC (Application Specific Integrated Circuit). The storage unit 35 is realized by a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), a flash memory, or the like. The program executed by the processor may be stored in advance in the storage unit 35 or may be downloaded from an external device. Further, the portable storage medium storing the program may be installed in the storage unit 35 by being mounted on a drive device (not shown).

  For example, the storage unit 35 stores a program for causing each unit of the control unit 30 to function, identification information of one or more portable devices 200 corresponding to the vehicle-mounted device 100, and the like. In the case of the present embodiment, it is assumed that the storage unit 35 stores identification information of a plurality of portable devices 200 of the portable device 210, the portable device 220, the portable device 230, and the portable device 240.

  The start control unit 31 (request detection unit) detects a request transmission request. The request signal transmission request is caused by, for example, an operation of the activation switch 16. The request signals include different types such as the first request signal and the second request signal. Each of the first request signal and the second request signal may be referred to as a pattern LFP1 and a pattern LFP2 in the following description.

  The communication control unit 32 (transmission control unit) transmits a request signal (portable device search signal) corresponding to the communication state of the vehicle-mounted device 100. For example, the communication control unit 32 performs different processing depending on a difference in state determined based on the communication possibility. For example, a state where communication is possible is a first communication enable state, and a state where communication is not possible is a second communication enable state. The second communicable state includes a state in which the terminal voltage of the battery B is insufficient compared to the specified threshold voltage VTH.

  The communication control unit 32 is in a first communicable state capable of transmitting a request signal (first request signal) to be transmitted including identification information of the specific portable device 200 and authentication processing data, and transmitting the request signal. When the request is detected, the first request signal corresponding to the identification information held in the storage unit 35 is sequentially transmitted from the transmission unit 41. For example, the first communicable state is a state in which the battery B stores power that can transmit a request signal in response to a request signal transmission request. The second communicable state is a state in which the battery B does not store power that can transmit a request signal in response to a request signal transmission request.

  On the other hand, the communication control unit 32 is in an incommunicable state where the first request signal cannot be transmitted, and is in a second communicable state by the kick actuating means 7 that drives the generator G that supplies power to the vehicle-mounted device 100. In this case, a second request signal for searching for and authenticating a specific portable device 200 is transmitted from the transmission unit 41.

  The determination unit 33 determines whether the portable device 200 corresponding to the answer signal corresponds to the vehicle-mounted device 100 based on the decoding result of the answer signal received by the receiving unit 42. The determination is made within a period of time.

  When it is determined by the determination unit 33 that the portable device 200 is compatible with the vehicle-mounted device 100, the drive control unit 34 releases the handle lock state and releases the engine E start restriction. For example, the drive control unit 34 drives the actuator unit 18 of the handle lock unit 17 via the drive circuit unit 43 to release the lock state of the handle. The drive control unit 34 starts the engine E by driving the generator G via the starter driving unit 47.

(Configuration of portable device 200)
The portable device 200 is authenticated by the vehicle-mounted device 100. The storage unit 35 of the in-vehicle device 100 stores identification information of a plurality of portable devices 200 such as the portable device 210, the portable device 220, the portable device 230, and the portable device 240. The portable device 210 includes a portable device receiver 211, a portable device transmitter 212, and a portable device control 213. The portable device reception unit 211 receives a request signal including either the first request signal or the second request signal transmitted by the in-vehicle device 100. The portable device transmission unit 212 transmits an answer signal under the control of the portable device control unit 213. When the portable device control unit 213 determines from the request signal received by the portable device reception unit 211 that the portable device 200 is the portable device 200 corresponding to the vehicle-mounted device 100, the answer signal corresponding to the received request signal Is transmitted from the portable device transmission unit 212.

  Note that a part or all of the portable device receiver 211, the portable device transmitter 212, and the portable device control 213 are software function units that function when a processor such as a CPU (Central Processing Unit) executes a program. It is good. Some or all of these may be hardware function units such as LSI (Large Scale Integration) and ASIC (Application Specific Integrated Circuit). The portable device control 213 may include a storage unit (not shown), and the storage unit is realized by a ROM (Read Only Memory), a RAM (Random Access Memory), a HDD (Hard Disk Drive), a flash memory, or the like. Is done. The program executed by the processor may be stored in the storage unit in advance or may be downloaded from an external device. Further, the portable storage medium storing the program may be installed in the storage unit by being mounted on a drive device (not shown).

(Request signal frame structure)
With reference to FIG. 2 and FIG. 3, the frame structure of the request signal transmitted by LF communication of this embodiment is demonstrated. FIG. 2 is an explanatory diagram showing the frame structure of the first request signal transmitted by the LF communication of this embodiment. FIG. 3 is an explanatory diagram showing the frame structure of the second request signal transmitted by the LF communication of this embodiment.

  The frame (first frame structure) of the pattern LFP1 shown in FIG. 2 is used in LF communication in the first communicable state such as during normal operation. The time required to transmit the pattern LFP1 is shown as TLFP1. For example, the pattern LFP1 includes at least each data such as training data TD, a frame header FH1, and portable device identification information IDk. Further, the pattern LFP1 may include authentication information AUD in addition to each data such as the error correction information ECC1 and each of the above data.

  The frame (second frame structure) of the pattern LFP2 shown in FIG. 3 is used in the LF communication in the second communicable state such as when the voltage of the battery B is lowered. The time required for transmission of the pattern LFP2 is indicated as TLFP2. For example, the pattern LFP2 includes at least each data such as training data TD, a frame header FH2, and portable device identification information IDk. Further, the pattern LFP2 may include data such as error correction information ECC2.

  The elements of each frame shown in FIGS. 2 and 3 will be described together.

  The training data TD is arranged to be transmitted first when the pattern LFP1 is transmitted. The training data TD is assigned a signal pattern required for adjustment of the portable device receiving unit 211 when the portable device receives the pattern LFP1.

  The frame header FH1 or the frame header FH2 is arranged so as to be transmitted next to the training data TD, for example. The frame header FH1 or the frame header FH2 includes a signal pattern used as an index for extracting various types of information after the portable device receiving unit 211 finishes training using the training data TD, and information for identifying the pattern type. That is, the frame header includes information for identifying the pattern LFP2 and the pattern LFP1.

  The portable device identification information IDk is identification information that identifies the portable device k corresponding to the destination of the pattern LFP1 or the pattern LFP2. Here, k represents, for example, the order in which portable devices are registered in the vehicle-mounted device, and is a natural number of 1 or more.

  The error correction information ECC1 is information for performing error detection and error correction of each data such as the received mobile device identification information IDk in the pattern LFP1. The error correction information ECC2 is information for performing error detection and error correction of each data such as the received mobile device identification information IDk in the pattern LFP2. Each of the error correction information ECC1 and the error correction information ECC2 can appropriately determine an error detection and error correction target range, an error detection and error correction method, and the like for each type of pattern.

  The authentication information AUD included in the pattern LFP1 indicates information (encryption key, ciphertext, etc.) required for encryption processing, for example. Information required for encryption processing may be sent using the authentication information AUD. A general algorithm can be applied to the cryptographic processing method. In the encryption processing, the information encrypted in the in-vehicle device 100 may be decrypted by the portable device 200, and the decrypted information may be determined by either the portable device 200 or the in-vehicle device 100.

  The authentication information AUD may be divided into a plurality of pieces. For example, as a method of dividing into plural, there is a method of time-sharing authentication information AUD1 and authentication information AUD2 as shown in FIG. Here, an example of sending encrypted information using authentication information AUD1 and authentication information AUD2 is shown. For example, the value of the period for sending the authentication information AUD1 (TAUD1) and the value of the period for sending the authentication information AUD2 (TAUD2) may be encrypted data transmitted from the in-vehicle device 100 to the portable device.

  As described above, when the authentication information AUD1 and the authentication information AUD2 are transmitted in a time-sharing manner, any of the following methods for enabling the period of the authentication information AUD1 and the period of the authentication information AUD2 to be identified can be used.

(1) The transmission power of the vehicle-mounted device 100 is adjusted so that the received signal strength value (RSSI) in the period of the authentication information AUD1 and the received signal strength value in the period of the authentication information AUD2 are different.

(2) The carrier frequency in the period of authentication information AUD1 and the carrier frequency in the period of authentication information AUD2 are switched.

(3) Each data is defined so that data transmitted during the period of the authentication information AUD1 and data transmitted during the period of the authentication information AUD2 are different. For example, the former is set to “1” and the latter is set to “0”.

(4) The illustration of (3) above is changed as follows. For example, using the data scrambled from the original data by an arithmetic expression for generating a specified pseudo-random number, the former is scrambled to “1” and the latter is scrambled to “0”. In addition, instead of generating scrambled data using an arithmetic expression each time transmission is performed, previously generated data may be stored in the storage unit 35, and each piece of specific divided information includes confidential information. You may do it.

  Note that the data allocation examples (1) to (4) are merely examples, and the former and the latter may be interchanged, and different values may be defined for the respective values.

  When comparing the pattern LFP1 and the pattern LFP2 configured as described above, the pattern LFP1 (main verification signal) has a data length longer than that of the pattern LFP2 (portable device search signal) and includes at least an authentication code. Also good.

(Processing when the on-vehicle device 100 is activated)
With reference to FIG. 4, the process at the time of starting of the onboard equipment of this embodiment is demonstrated. The figure is a flowchart showing a procedure of processing at the time of starting the on-vehicle device of the present embodiment.

  The control unit 30 performs an initialization process. For example, the initialization process includes a process for setting an input / output port corresponding to a peripheral part of the control unit 30 and a process for adjusting an initial state of the receiving unit 42 (step SU10).

  The start control unit 31 determines whether or not the start switch 16 is in an off (shut off) state (step SU20). When it is determined by the determination in step SU20 that the activation switch 16 is in the off (shutoff) state (step SU20: No), the control unit 30 advances the process to step SU40. When it is determined by the determination in step SU20 that the activation switch 16 is in an off (shutoff) state (step SU20: Yes), the control unit 30 performs a kick start authentication process (step SU30).

  After the determination in step SU20 or after the process in step SU30 is completed, the control unit 30 repeatedly performs a timer process that waits for execution of the next process until a predetermined waiting time elapses ( Step SU40). In the timer process of step SU40, when a predetermined waiting time (for example, 300 ms) has elapsed (step SU40: Yes), the control unit 30 performs an initialization process. For example, the initialization process includes an input / output port setting process that is a peripheral part of the control unit 30 and a process of adjusting the initial state of the receiving unit 42 (step SU50). After completing the initialization process in step SU50, the control unit 30 performs a normal operation process (step SU60).

With reference to FIG. 5, “the authentication process for kick start” of the vehicle-mounted device of the present embodiment will be described. This figure is a flowchart showing the procedure of “authentication process for kick start” of the vehicle-mounted device of the present embodiment.
In the following description, the pattern LFP2 signal including the identification information of the portable device 210 is denoted as LFP21, the pattern LFP2 signal including the identification information of the portable device 220 is denoted as LFP22, and the pattern LFP2 signal including the identification information of the portable device 230 is denoted as LFP23. A pattern LFP2 signal including identification information of the portable device 240 is denoted as LFP24. The answer signal of the portable device 210 for the LFP 21 is indicated as RFA21, the answer signal of the portable device 220 for the LFP22 is indicated as RFA22, the answer signal of the portable device 230 for the LFP23 is indicated as RFA23, and the answer signal of the portable device 240 for the LFP24 is indicated. This is indicated as RFA24. Communication using LFP 21 to LFP 24 (second request signal) and RFA 21 to RFA 24 is referred to as “kick authentication communication”.

  Similarly to the above, the pattern LFP1 signal including the identification information of the portable device 210 is denoted as LFP11, the pattern LFP1 signal including the identification information of the portable device 220 is denoted as LFP12, and the pattern LFP1 signal including the identification information of the portable device 230 is denoted as LFP13. The pattern LFP1 signal including the identification information of the portable device 240 is denoted as LFP14. The answer signal of the portable device 210 for the LFP 11 is indicated as RFA11, the answer signal of the portable device 220 for the LFP 12 is indicated as RFA12, the answer signal of the portable device 230 for the LFP13 is indicated as RFA13, and the answer signal of the portable device 240 for the LFP14 is indicated. This is indicated as RFA14. Communication using LFP 11 to LFP 14 (main verification signal, first request signal) and RFA 11 to RFA 14 (main verification answer) is referred to as “smart authentication communication”.

  The control unit 30 starts kick authentication communication with the portable device 210, transmits the LFP 21 from the transmission unit 41, waits for reception of the RFA 21 after transmitting the LFP 21, and identifies the portable device of the received signal. (Step SU311). The determination unit 33 determines whether or not the authentication that the identified portable device is the portable device 210 has succeeded (step SU312). When it is determined in step SU312 that the authentication is not successful (step SU312: No), the control unit 30 proceeds to the process of step SU320.

  If it is determined in step SU312 that the authentication is successful (step SU312: Yes), the control unit 30 starts smart authentication communication with the portable device 210. For example, the control unit 30 transmits the LFP 11 from the transmission unit 41, waits for reception of the RFA 11 after transmitting the LFP 11, and confirms that the identification of the portable device and the received data are authentic from the received signal Identify (step SU313). The determination unit 33 determines whether the smart authentication communication with the portable device 210 has succeeded (step SU314).

  If it is determined in step SU314 that the smart authentication communication is successful (step SU314: Yes), the control unit 30 performs an unlocking process (step SU315), and ends the process. If it is determined in step SU314 that the smart authentication communication has not been successful (step SU314: No), the process ends.

  On the other hand, if it is determined in step SU312 that the authentication is not successful (step SU312: No), the control unit 30 determines whether the portable device 220 is registered in the storage unit 35 (step SU320). If it is determined in step SU320 that the portable device 220 is not registered (step SU320: No), the process is terminated. If it is determined in step SU320 that the portable device 220 is registered (step SU320: Yes), the following processing is performed.

  The control unit 30 starts kick authentication communication with the portable device 220, transmits the LFP 22 from the transmission unit 41, transmits the LFP 22, waits for reception of the RFA 22, and identifies the portable device of the received signal. (Step SU321). The determination unit 33 determines whether or not the authentication that the identified portable device is the portable device 220 has been successful (step SU322). If it is determined in step SU322 that the authentication is not successful (step SU322: No), the control unit 30 proceeds to the process of step SU330.

  If it is determined in step SU322 that the authentication is successful (step SU322: Yes), the control unit 30 starts smart authentication communication with the portable device 220. For example, the control unit 30 transmits the LFP 12 from the transmission unit 41, waits for the reception of the RFA 12 after transmitting the LFP 12, and whether the received data is legitimate from the received signal. Identify (step SU323). The determination unit 33 determines whether the smart authentication communication with the portable device 220 has been successful (step SU324).

  If it is determined in step SU324 that the smart authentication communication is successful (step SU324: Yes), the control unit 30 performs the unlocking process in step SU315 described above and ends the process. If it is determined in step SU324 that the smart authentication communication has not been successful (step SU324: No), the process ends.

  On the other hand, when it is determined in step SU322 that the authentication is not successful (step SU322: No), the control unit 30 determines whether the portable device 230 is registered in the storage unit 35 (step SU330). If it is determined in step SU330 that the portable device 230 is not registered (step SU330: No), the process ends. If it is determined in step SU330 that the portable device 230 is registered (step SU330: Yes), the following processing is performed.

  The control unit 30 starts kick authentication communication with the portable device 230, transmits the LFP 23 from the transmission unit 41, transmits the LFP 23, waits for reception of the RFA 23, and identifies the portable device of the received signal. (Step SU331). The determination unit 33 determines whether or not the authentication that the identified portable device is the portable device 230 has been successful (step SU332). If it is determined in step SU332 that the authentication is not successful (step SU332: No), the control unit 30 proceeds to the process of step SU330.

  If it is determined in step SU332 that the authentication is successful (step SU332: Yes), the control unit 30 starts smart authentication communication with the portable device 230. For example, the control unit 30 transmits the LFP 13 from the transmission unit 41, waits for the reception of the RFA 13 after transmitting the LFP 13, and whether the received data is legitimate from the received signal. Identify (step SU333). The determination unit 33 determines whether the smart authentication communication with the portable device 230 has succeeded (step SU334).

  If it is determined in step SU334 that the smart authentication communication is successful (step SU334: Yes), the control unit 30 performs the unlocking process in step SU315 described above and ends the process. If it is determined in step SU334 that the smart authentication communication has not been successful (step SU334: No), the process ends.

  On the other hand, if it is determined in step SU332 that the authentication has not been successful (step SU332: No), the control unit 30 determines whether the portable device 240 is registered in the storage unit 35 (step SU340). If it is determined in step SU340 that the portable device 240 is not registered (step SU340: No), the process ends. If it is determined in step SU340 that the portable device 240 is registered (step SU340: Yes), the following processing is performed.

  The control unit 30 starts smart authentication communication with the portable device 240. For example, the control unit 30 transmits the LFP 14 from the transmission unit 41, waits for reception of the RFA 14 after transmitting the LFP 14, and confirms whether the received data is legitimate from the received signal. Identify (step SU343). The determination unit 33 determines whether the smart authentication communication with the portable device 240 has succeeded (step SU344).

  If it is determined in step SU344 that the smart authentication communication is successful (step SU344: Yes), the control unit 30 performs the unlocking process in step SU315 described above and ends the process. If it is determined in step SU344 that the smart authentication communication has not been successful (step SU344: No), the process ends.

  As described above, when the portable device 200 cannot be searched, the control unit 30 transmits a portable device search signal for searching for another portable device among the plurality of portable devices from the LFP 21 to the LFP 23 (other second request signal). And the process of waiting for reception of the answer signal from the portable device is repeated the number of times determined based on the number of portable devices 200 corresponding to the vehicle-mounted device 100.

  With reference to FIG. 6, the process of the portable device of this embodiment will be described. FIG. 5 is a flowchart showing a processing procedure of the portable device of the present embodiment. Hereinafter, the portable device 210 will be described as an example.

  The portable device reception unit 211 receives the LF signal (step SF31). The portable device control unit 213 determines the pattern of the received LF signal (step SF32).

  If it is determined in step SF32 that the pattern of the received LF signal is the pattern LFP1, the portable device control unit 213 performs reception processing of the pattern LFP1 (step SF33). The portable device control unit 213 collates the identification number of the portable device included in the pattern LFP1 with the identification number assigned to the own device, and determines whether the collation is successful (step SF34). As a result of the collation in step SF34, when it is determined that the collation is unsuccessful (step SF34: No), the process ends.

  On the other hand, when it is determined that the collation is successful as a result of the collation in step SF34 (step SF34: Yes), the portable device control unit 213 extracts the secret information from the pattern LFP1, for example, the secret information is the authentication information AUD. Information such as an encryption key and ciphertext sent from the vehicle-mounted device 100 may be included (step SF35). The portable device control unit 213 transmits an answer process for the pattern LFP1 from the portable device transmission unit 212, and ends the process (step SF36).

  Furthermore, when the pattern of the received LF signal is determined to be the pattern LFP2 by the determination in step SF32, the portable device control unit 213 performs a reception process for the pattern LFP2 (step SF37). The portable device control unit 213 collates the identification number of the portable device included in the pattern LFP2 with the identification number assigned to the own device, and determines whether the collation is successful (step SF38). As a result of the collation in step SF38, when it is determined that the collation is unsuccessful (step SF38: No), the process ends.

  On the other hand, when it is determined that the collation is successful as a result of the collation in step SF38 (step SF38: Yes), the portable device control unit 213 transmits an answer process for the pattern LFP2 from the portable device transmission unit 212, and ends the process. (Step SF39).

  Processing of the portable device authentication system 1 will be described with reference to FIGS. FIG. 7 is a timing chart showing processing of the portable device authentication system 1 based on the first condition.

  In the figure, (a) battery voltage, (b) control unit activation, (c) control unit initialization processing, (d) main switch, (e) main switch determination value, (f) LF transmission, (g) Each state of portable device processing, (h) RF reception, (i) RF data determination, (j) solenoid control, and (k) unlocking is shown.

  The conditions (first condition) relating to the processing shown in FIG. Four portable devices 200 (a portable device 210, a portable device 220, a portable device 230, and a portable device 240) are registered in the in-vehicle device 100. The registered order is the order of the portable device 210, the portable device 220, the portable device 230, and the portable device 240. The in-vehicle device 100 performs the authentication process of the portable device 200 in the above order. In the vicinity of the vehicle-mounted device 100, the portable device 210 and the portable device 220 that can respond are not present, the portable device 230 that can respond is present, and the presence of the portable device 240 is arbitrary.

  A kick operation is performed at time t1. The power supply unit 20 detects that the voltage of the battery B (battery voltage) has reached a predetermined threshold voltage by the action of the kick actuating means 7 (time t10). From time t1 to time t30, the voltage of the battery B (battery voltage) can secure a predetermined threshold voltage, and the time is TMAX.

  After time t10, the control unit 30 is instructed to start the control unit ("control unit start-up: ON"). In response to the instruction, the control unit 30 performs the control unit initialization process and ends by time t15. The control unit 30 detects that the main switch 11 is in an OFF state, and continues the determination result (main switch determination value) of the main switch while it is OFF.

  The control unit 30 sequentially transmits LF signals corresponding to the portable devices registered in the control unit 30 as described below.

  At time t211, the vehicle-mounted device 100 starts transmission of the LFP 21. When the portable device 210 does not exist within the range where the LFP 21 can be received, the answer signal from the portable device 210 does not reach the vehicle-mounted device 100 after time t212. The answer unit cannot receive the answer signal, and the control unit 30 detects that the portable device 210 does not exist.

  At time t221, the vehicle-mounted device 100 starts transmission of the LFP 22. When the portable device 220 does not exist within the range where the LFP 22 can be received, the answer signal from the portable device 220 does not reach the vehicle-mounted device 100 after time t222. The answer unit cannot receive the answer signal, and the control unit 30 detects that the portable device 220 does not exist.

  At time t231, the vehicle-mounted device 100 starts transmission of the LFP 23. The portable device 230 exists in a range where the LFP 23 can be received, and the portable device 230 receives the LFP 23. The portable device 230 starts transmission of the answer signal (RFA23) from the portable device 230 after time t232. The vehicle-mounted device 100 receives the answer signal (RFA 23) by the receiving unit 42.

  At time t233, the vehicle-mounted device 100 performs authentication (RF data determination) of the portable device 230 based on the received answer signal (RFA23). The in-vehicle device 100 starts “smart authentication communication” when the authentication of the portable device 230 is successful.

  As “smart authentication communication” of the portable device 230, the vehicle-mounted device 100 starts transmission of the LFP 13 at time t131. The portable device 230 receives the LFP 13. The portable device 230 starts transmission of the answer signal (RFA13) from the portable device 230 after time t132. The in-vehicle device 100 receives the answer signal (RFA13) by the receiving unit.

  At time t133, the in-vehicle device 100 performs authentication (RF data determination) of the portable device 230 based on the received answer signal (RFA13). When the authentication of the portable device 230 is successful (time t134), the vehicle-mounted device 100 controls the control unit 30 (drive control unit 34) to drive the solenoid of each unit to unlock the locked state of each unit. The locked state of each part is unlocked within a period from time t135 to time t30.

  As described above, the control unit 30 (communication control unit 32) transmits a portable device search signal for searching for one portable device 200 of the plurality of portable devices 200 as one second request signal, and then the portable device. The reception unit 42 is made to wait for reception of an answer signal from 200. When the answer signal from the portable device 200 is not received within a predetermined time, the control unit 30 generates a portable device search signal for searching for another one of the plurality of portable devices 200. It transmits as another 2nd request signal. Further, the control unit 30 repeats the process of waiting for the reception of the answer signal from the portable device 200 by the number of times determined based on the number of portable devices 200 corresponding to the vehicle-mounted device 100. For example, when receiving the answer signal RFA23, the control unit 30 has a pattern LFP13 that has a data length longer than that of the portable device search signal and includes at least an authentication code, etc. (this verification signal) to the portable device 230 that has transmitted the answer signal RFA23 Send. The portable device 230 that has transmitted the answer signal RFA23 receives the transmitted pattern LFP13 (main verification signal) and transmits an answer signal RFA13 (main verification answer signal) corresponding to the pattern LFP13. The receiving unit 42 receives the answer signal RFA13 (main verification answer signal), and the determination unit 33 authenticates the portable device 200 based on the answer signal RFA13 (main verification answer signal).

  As a result, the vehicle-mounted device 100 opens the locked state of each part during a period (TMAX) in which the voltage of the battery B by one kick operation is continuously maintained at a voltage sufficient to cause each part to function. Can be controlled to lock.

  FIG. 8 is a timing chart showing processing of the portable device authentication system 1 based on the second condition.

  In the figure, (a) battery voltage, (b) control unit activation, (c) control unit initialization processing, (d) main switch, (e) main switch determination value, (f) LF transmission, (g) Each state of portable device processing, (h) RF reception, (i) RF data determination, (j) solenoid control, and (k) unlocking is shown.

  The conditions (second conditions) relating to the processing shown in FIG. Four portable devices 200 (a portable device 210, a portable device 220, a portable device 230, and a portable device 240) are registered in the in-vehicle device 100. The registered order is the order of the portable device 210, the portable device 220, the portable device 230, and the portable device 240. The portable device 100 performs the authentication process of the portable device 200 in the above order. In the vicinity of the vehicle-mounted device 100, there are no portable device 210, portable device 220, and portable device 230 that can respond, but there is a portable device 240 that can respond.

  In the figure, after the kick operation is performed at time t1, a period during which the voltage of the battery B (battery voltage) is maintained at a predetermined threshold voltage (TMAX, a period from time t10 to time t30) is This is the same as FIG. The state transition between time t1 and time tt232 is also the same as that in FIG.

  Under this condition, the vehicle-mounted device 100 starts transmission of the LFP 23 at time t231. Since the portable device 230 does not exist within the range in which the LFP 23 can be received, the answer signal from the portable device 230 does not reach the vehicle-mounted device 100 after time t232. The answer unit cannot receive the answer signal, and the control unit 30 detects that the portable device 230 does not exist.

  As described above, the control unit 30 of the in-vehicle device 100 has already detected that there is no response from each of the portable devices 210, 220, and 230. At this stage, there is only the portable device 240 to be detected. Therefore, the LFP 14 is directly transmitted to the portable device 240 registered so that the search order is lowest, without transmitting the LFP 24. In short, when the answer signal cannot be received before the time TLFW2 elapses from time t232, the vehicle-mounted device 100 starts “smart authentication communication” with respect to the portable device 240 at time t141.

The description from time t141 to time t145 corresponds to the description from time t131 to time t135 in FIG. The difference is that the target of “smart authentication communication” is for the portable device 240.
Regarding this point, even if the LFP 240 to the portable device 240 having the lowest search order among the plurality of registered portable devices 210 to 240 is omitted, there is a temporal influence on subsequent communication depending on the presence or absence of the portable device 240. Absent. Therefore, in the case where the smart authentication of the portable device 240, which takes the longest time to complete the smart authentication communication, is performed, the time until the smart authentication communication is completed by omitting the transmission of the LFP 24 to the portable device 240. Is shortened.

  As described above, even in the case of the above-described conditions, the on-board device is within the period (TMAX) in which the voltage of the battery B by one kick operation is continuously maintained at a voltage sufficient to cause each part to function. 100 can be controlled to unlock the locked state of each part.

  With reference to FIG. 9 and FIG. 10, the operation when the voltage of the battery B is sufficiently high and the kick operation is not required will be described. 9 and 10 are timing charts showing the operation when the voltage of the battery B is sufficiently high and the kick operation is not required.

  In the figure, (a) start switch, (b) control unit start, (c) control unit initialization process, (d) main switch, (e) main switch determination value, (f) LF transmission, (g) Each state of portable device processing, (h) RF reception, (i) RF data determination, (j) solenoid control, and (k) unlocking is shown.

  The conditions (third condition) relating to the processing shown in FIG. 9 are as follows. Four portable devices 200 (a portable device 210, a portable device 220, a portable device 230, and a portable device 240) are registered in the in-vehicle device 100. The registered order is the order of the portable device 210, the portable device 220, the portable device 230, and the portable device 240. The portable device 100 performs the authentication process of the portable device 200 in the above order. A portable device 210 that can respond is present in the vicinity of the vehicle-mounted device 100, and the presence of the portable device 220, the portable device 230, and the portable device 240 is arbitrary. Note that the voltage of the battery B is sufficiently high, and the vehicle-mounted device 100 unlocks the locked state of each part by operating the start switch 16 without requiring a kick operation.

  At time t20, when the operation of the start switch 16 is detected (0 V), the control unit 30 is instructed to start the control unit (“control unit start: ON (ON)”). In response to the instruction, the control unit 30 performs the control unit initialization process and ends by time t25. The control unit 30 detects that the main switch 11 is in an OFF state, and continues the determination result (main switch determination value) of the main switch while it is OFF.

  The control unit 30 sequentially transmits LF signals corresponding to the portable devices registered in the control unit 30 as described below.

  The in-vehicle device 100 starts “smart authentication communication”.

  As “smart authentication communication” of the portable device 210, the vehicle-mounted device 100 starts transmission of the LFP 11 at time t111. The portable device 210 receives the LFP 11. The portable device 210 starts transmitting an answer signal (RFA11) from the portable device 210 after time t112. The in-vehicle device 100 receives the answer signal (RFA11) by the receiving unit.

  At time t113, the in-vehicle device 100 performs authentication (RF data determination) of the portable device 210 based on the received answer signal (RFA11). When the authentication of the portable device 210 is successful (time t114), the vehicle-mounted device 100 controls the control unit 30 (drive control unit 34) to drive the solenoid of each unit to unlock the locked state of each unit. The locked state of each part is unlocked within a period from time t135 to time t30.

  As described above, the on-board device 100 can be controlled to unlock the locked state of each part while the voltage of the battery B continues to be sufficient to cause each part to function.

  The conditions (fourth condition) relating to the processing shown in FIG. 10 are as follows. Four portable devices 200 (a portable device 210, a portable device 220, a portable device 230, and a portable device 240) are registered in the in-vehicle device 100. The registered order is the order of the portable device 210, the portable device 220, the portable device 230, and the portable device 240. The portable device 100 performs the authentication process of the portable device 200 in the above order. In the vicinity of the vehicle-mounted device 100, the portable device 210, the portable device 220, and the portable device 230 that can respond are not present, but the portable device 240 is present. Note that the voltage of the battery B is sufficiently high, and the vehicle-mounted device 100 unlocks the locked state of each part by operating the start switch 16 without requiring a kick operation.

  At time t20, when the operation of the start switch 16 is detected (0 V), the control unit 30 is instructed to start the control unit (“control unit start: ON (ON)”). In response to the instruction, the control unit 30 performs the control unit initialization process and ends by time t25. The control unit 30 detects that the main switch 11 is in an OFF state, and continues the determination result (main switch determination value) of the main switch while it is OFF.

  At time t111, the vehicle-mounted device 100 starts transmission of the LFP 11. When the portable device 210 does not exist within the range in which the LFP 11 can be received, the answer signal from the portable device 210 does not reach the vehicle-mounted device 100 after time t112. The answer unit cannot receive the answer signal, and the control unit 30 detects that the portable device 210 does not exist.

  At time t121, the vehicle-mounted device 100 starts transmission of the LFP 12. When the portable device 220 does not exist within the range where the LFP 12 can be received, the answer signal from the portable device 220 does not reach the vehicle-mounted device 100 after time t122. The answer unit cannot receive the answer signal, and the control unit 30 detects that the portable device 220 does not exist.

  At time t131, the vehicle-mounted device 100 starts transmission of the LFP 13. When the portable device 230 does not exist within the range where the LFP 13 can be received, the answer signal from the portable device 230 does not reach the vehicle-mounted device 100 after time t132. The answer unit cannot receive the answer signal, and the control unit 30 detects that the portable device 230 does not exist.

  At time t141, the vehicle-mounted device 100 starts transmission of the LFP 14. The portable device 140 exists in a range where the LFP 14 can be received, and the portable device 240 receives the LFP 14. The portable device 240 starts transmission of the answer signal (RFA23) from the portable device 240 after time t142. The in-vehicle device 100 receives the answer signal (RFA 24) by the receiving unit 42.

  At time t143, the in-vehicle device 100 performs “smart authentication communication” of the portable device 240 based on the received answer signal (RFA14).

(Examination of processing time based on each condition)

  First, referring to FIG. 7 and FIG. 8 described above, the processing time required to release the lock will be examined.

The time from time t10 to time t15 is TD1, and the time from time t15 to time t211 is TD2.
The time for transmission of LFP21, LFP22, and LFP23 is TLFP2. Let TLFW2 be a period of waiting for the transmitted responses from LFP21, LFP22, and LFP23. The time taken to receive the RFA 23 as a response to the LFP 23 is TRFP2. The time taken for the determination of the received RFA 23 is TJ2. Although not shown in the figure, each period during which RFA 21 and RFA 22 are received as a response to LFP 21 and LFP 22 is referred to as TLFW2.

  A time related to transmission of the LFP 13 and the LFP 14 is TLFP1. As a response to the LFP 13 and the LFP 14, the time taken to receive the RFA 23 and the RFA 24 is TRFP2. The time taken to determine the received RFA 13 and RFA 23 is TJ1.

  In the case of the first condition shown in FIG. 7 described above, the value of each period is assigned so that the following equation (1) is satisfied.

TMAX> (3xTLFP2 + 2xTLFW2 + TRFP2 + TJ2)
+ (TLFP1 + TRFP1 + TJ1) + (TD1 + TD2 + TD3)
... (1)

  In the case of the second condition shown in FIG. 8, the value of each period is assigned so that the following expression (2) is satisfied.

TMAX> (3xTLFP2 + 3xTLFW2 + TJ2)
+ (TLFP1 + TRFP1 + TJ1) + (TD1 + TD2 + TD3)
... (2)

  FIG. 7 and FIG. 8 show the cases where the third and fourth portable devices respond, respectively, but when the first and second portable devices respond, It is apparent that the length is shorter than that shown in FIGS.

  FIG. 7 and FIG. 8 show the cases where the third and fourth portable devices respond, respectively, but when the first and second portable devices respond, It is apparent that the length is shorter than that shown in FIGS.

  FIGS. 9 and 10 show a case where only “smart authentication communication” is used without using “kick authentication communication”. In particular, the case shown in FIG. 10 is a case where the fourth portable device responds in the same manner as in the case of the second condition. The time required when the fourth portable device responds in the case of the fourth condition is expressed by the following equation (3).

TMAX <(4xTLFP1 + 3xTLFW2 + TRFP1 + TJ1
+ (TD1 + TD2 + TD3)
... (3)

  In the above equation (3), the standby time is assumed to be the same as TLFW2.

  Taking the difference between the right side of the above formula (3) and formula (2), the following formula (4) is obtained.

  (3x (TLFP1-TLFP2) + TJ2) (4)

  The larger the value of the above equation (4), the greater the effect of shortening the time according to this embodiment. Thus, according to the portable device authentication system according to the present embodiment, it is possible to shorten the time until the restriction on the use of the devices of the respective units related to the vehicle-mounted device 100 is released using the portable device 200. Thereby, smart authentication processing corresponding to a plurality of portable devices 200 can be performed within a short communicable time in the kick operation.

  As described above, the portable device authentication system 1 can improve the convenience when the use restriction of the device related to the vehicle-mounted device 100 is released using the portable device 200.

  As mentioned above, although the form for implementing this invention was demonstrated using embodiment, this invention is not limited to such embodiment at all, In the range which does not deviate from the summary of this invention, various deformation | transformation and substitution Can be added.

DESCRIPTION OF SYMBOLS 1 ... Portable apparatus authentication system, 6 ... Kick pedal, 7 ... Kick actuating means, 8 ... Conversion part, 17 ... Handle lock part, 18 ... Actuator part, 100 ... Onboard equipment, 20 ... Power supply part, 30 ... Control part, 31 ... Starting control unit 32 ... Communication control unit 33 ... Determining unit 34 ... Drive control unit 35 ... Storage unit 41 ... Transmitting unit 42 ... Receiving unit 43 ... Drive circuit unit 44 ... Input circuit unit 45 ... main switch state acquisition unit, 46 ... main relay drive unit, 47 ... starter drive unit, 200, 210, 220, 230, 240 ... portable device, 211, 221, 231, 241 ... portable device reception unit, 212, 222, 232, 242 ... portable device transmission unit, 213, 223, 233, 243 ... portable device control unit V ... scooter, E ... engine, P ... power unit, B ... battery, H ... handle

Claims (7)

A portable device authentication system comprising an on-vehicle device and one or more portable devices corresponding to the on-vehicle device,
The in-vehicle device is
A storage unit that holds identification information of the corresponding one or more portable devices;
A transmission unit for transmitting a request signal;
A receiver for receiving an answer signal from at least one portable device corresponding to the transmission of the request signal;
A request detection unit for detecting a request for transmitting a request signal;
When the first request signal to be transmitted including the identification information of the specific portable device and the authentication processing data is in a first communicable state, and the request signal transmission request is detected, the data is retained. The first request signal corresponding to the identification information is sequentially transmitted, the first request signal cannot be transmitted, the communication is disabled, and the kick operating means that drives the generator that supplies power to the vehicle-mounted device A transmission control unit for transmitting a second request signal for performing search and authentication of the specific portable device when the communication is enabled;
A determination unit that determines whether a portable device corresponding to the answer signal corresponds to the vehicle-mounted device based on a result of decoding the received answer signal within a period in which the second communicable state continues. When,
A portable device authentication system characterized by comprising: The second request signal includes data that causes the specific portable device to respond to the answer signal,
The portable device authentication system according to claim 1, wherein a length of the second request signal including data for responding to the answer signal is shorter than a length of the first request signal. The length of the second request signal is such that the process of searching for one or a plurality of portable devices corresponding to the on-vehicle device, authentication, and unlocking the controlled object ends within a period corresponding to the one kick operation. The portable device authentication system according to claim 1, wherein the length is determined as follows. The transmission control unit
After transmitting a portable device search signal for searching for one portable device of the plurality of portable devices as one second request signal, the reception unit waits for reception of an answer signal from the portable device, When the answer signal from the portable device is not received within a predetermined time, a portable device search signal for searching for another portable device among the plurality of portable devices is set as another second request signal. The process of transmitting and waiting for reception of an answer signal from the portable device is repeated a number of times determined based on the number of portable devices corresponding to the on-vehicle device,
When receiving the answer signal, to the portable device that transmitted the answer signal, the data length is longer than the portable device search signal, the verification signal including at least an authentication code,
The portable device that transmitted the answer signal is:
Receiving the transmitted main verification signal and transmitting a main verification answer signal corresponding to the main verification signal;
The receiving unit receives the main verification answer signal,
The mobile device authentication system according to any one of claims 1 to 3, wherein the determination unit authenticates the mobile device based on the main verification answer signal. The transmission control unit
If the answer signal is not received even when the search for the predetermined number of portable devices is repeated, the data length is longer than the portable device search signal for at least the authentication for the predetermined portable device. The mobile device authentication system according to claim 4, wherein the verification signal including the code is transmitted. An in-vehicle device for a portable device authentication system for authenticating one or more portable devices,
A storage unit that holds identification information of one or more portable devices;
A transmission unit for transmitting a request signal;
A receiver for receiving an answer signal from at least one portable device corresponding to the transmission of the request signal;
A request detection unit for detecting a request for transmitting a request signal;
When the first request signal to be transmitted including the identification information of the specific portable device and the authentication processing data is in a first communicable state, and the request signal transmission request is detected, the data is retained. The first request signal corresponding to the identification information is sequentially transmitted, the first request signal cannot be transmitted, the communication is disabled, and the kick operating means that drives the generator that supplies power to the vehicle-mounted device A transmission control unit for transmitting a second request signal for performing search and authentication of the specific portable device when the communication is enabled;
A determination unit that determines whether a portable device corresponding to the answer signal corresponds to the vehicle-mounted device based on a result of decoding the received answer signal within a period in which the second communicable state continues. When,
In-vehicle device characterized by comprising. The portable device authentication system according to any one of claims 1 to 5, wherein the portable device is authenticated by the vehicle-mounted device,
A portable device receiver that receives a request signal including either the first request signal or the second request signal transmitted by the in-vehicle device;
A portable device transmitter for transmitting an answer signal;
A portable device control unit that transmits an answer signal corresponding to the received request signal when it is determined from the received request signal that the portable device is a portable device corresponding to the vehicle-mounted device. Portable machine.

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