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WO2017014059A1 - Keyless entry device, communication device for keyless entry devices, and control method for keyless entry devices - Google Patents

Keyless entry device, communication device for keyless entry devices, and control method for keyless entry devices Download PDF

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Publication number
WO2017014059A1
WO2017014059A1 PCT/JP2016/070159 JP2016070159W WO2017014059A1 WO 2017014059 A1 WO2017014059 A1 WO 2017014059A1 JP 2016070159 W JP2016070159 W JP 2016070159W WO 2017014059 A1 WO2017014059 A1 WO 2017014059A1
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WIPO (PCT)
Prior art keywords
communication device
authentication signal
appropriate
keyless entry
communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2016/070159
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French (fr)
Japanese (ja)
Inventor
宮澤　明
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Filing date
Publication date
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Publication of WO2017014059A1 publication Critical patent/WO2017014059A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Definitions

  • the present invention relates to a keyless entry device, a communication device for keyless entry device, and a control method of the keyless entry device.
  • the door lock of the vehicle is unlocked when it is confirmed that the portable device is within a certain range from the vehicle.
  • a keyless entry device that performs processing such as locking.
  • LF low frequency
  • RF radio frequency
  • the on-vehicle device permits the control unit of the vehicle to unlock the door based on the response from the portable device.
  • the portable device is further than the receivable range of the LF signal transmitted from the in-vehicle device, the door unlocking is not permitted since the response from the portable device is not returned to the in-vehicle device.
  • the first unauthorized repeater intercepts the LF signal near the in-vehicle device, transmits the waveform information of the LF signal as an RF signal
  • the second unauthorized repeater intercepts the LF signal from the RF signal near the portable device.
  • a relay attack that reproduces and transmits is known.
  • the LF signal transmitted from the in-vehicle device also reaches the portable device which is farther than the receivable range of the LF signal. Then, since the portable device is falsely recognized as being in the vicinity of the in-vehicle device and the normal response is returned to the in-vehicle device, there is a problem that the in-vehicle device permits unlocking of the door of the vehicle.
  • Patent Document 1 there is known a keyless entry device that changes the strength of an LF signal transmitted from an on-vehicle device. Since a rogue repeater with poor performance often can not reproduce changes in the strength of the LF signal, the presence of a relay attack is detected to prevent fraud by detecting changes in the strength of the LF signal with the portable device. Can.
  • the frequency of the carrier wave of the signal transmitted from the in-vehicle device is temporally changed, although it is one at each time.
  • the changed frequency is notified in advance between the in-vehicle device and the portable device. Since a rogue repeater with poor performance often can not follow the frequency that changes over time, the portable unit measures the signal strength of the frequency corresponding to each time to detect the presence or absence of a relay attack. It is possible to prevent fraud.
  • Patent Document 1 has a disadvantage that it may not be possible to detect the presence or absence of a relay attack.
  • Patent Document 2 requires the notification of the frequency to be used, and in addition to the complexity of the device, the signal strength needs to be measured a plurality of times, which has a disadvantage of taking a long determination time.
  • the present invention has been made in view of the above circumstances, and its object is to provide a keyless entry device, a keyless entry device communication device, and a keyless entry device control method capable of preventing fraud with a simple configuration with high accuracy and short time. It is to provide.
  • the present invention includes a first communication device and a second communication device that perform wireless communication, and performs appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate.
  • a keyless entry device wherein the first communication device includes a transmitter configured to wirelessly transmit at least one authentication signal, and the second communication device includes a receiver configured to receive the at least one authentication signal; At least one of the first communication device and the second communication device further includes a processing unit, and the processing unit determines that at least one authentication signal received by the receiving unit of the second communication device is a predetermined reference. Perform the appropriate time process when not delayed for a predetermined time, and perform the incorrect time process when at least one authentication signal received by the receiving unit of the second communication device is delayed for a predetermined time with respect to a predetermined reference , Is a keyless entry device
  • the transmission unit of the first communication device is a first authentication signal with a first frequency, and a second authentication signal with a second frequency different from the first frequency.
  • the receiving unit of the second communication apparatus receives the first authentication signal and the second authentication signal, and the processing unit is received by the receiving unit of the second communication apparatus.
  • a proper process is performed when one of the authentication signal and the second authentication signal is not delayed by a predetermined time with respect to the other, and the first authentication signal and the second authentication signal received by the receiving unit of the second communication device are processed.
  • an improper processing is performed.
  • the in-appropriate process includes continuing wireless communication between the first communication apparatus and the second communication apparatus, and the inappropriate-time process includes the first communication apparatus Stopping the wireless communication with the second communication device.
  • the second communication device further includes a transmission unit, and the processing when appropriate indicates that wireless communication between the first communication device and the second communication device is appropriate.
  • Including the transmission of the information indicating the transmission from the transmission unit of the second communication apparatus, and the improper processing includes information indicating that the wireless communication between the first communication apparatus and the second communication apparatus is inappropriate. , Transmitting from the transmitter of the second communication device.
  • the second communication device transmits information on the waveform of the authentication signal received by the transmitter and the receiver of the second communication device from the transmitter of the second communication device.
  • a transfer unit, and the first communication device further includes a reception unit for receiving information from the transfer unit of the second communication device, and at least a part of the processing unit; At least a part of the processing units included in the unit performs the appropriate processing and the inappropriate processing based on the information received by the first communication device.
  • the second communication device transmits time information of the authentication signal received by the transmitting unit and the receiving unit of the second communication device from the transmitting unit of the second communication device.
  • a transfer unit, and the first communication device further includes a reception unit for receiving time information from the transfer unit of the second communication device, and at least a part of the processing unit; At least a part of the processing units included in the processing unit perform the appropriate processing and the inappropriate processing based on the time information received by the first communication device.
  • the time information indicates the reception timing of the authentication signal in the second communication device.
  • the first communication device transmits a plurality of authentication signals, and the time information indicates a deviation in reception timing between at least two authentication signals.
  • the present invention performs wireless communication with another communication device, and performs appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate, in cooperation with another communication device.
  • a communication device for keyless entry device comprising: a transmitter configured to wirelessly transmit at least one authentication signal; and in cooperation with another communication device, an authentication signal received by another communication device is compared with a predetermined reference Keyless entry device communication, which performs proper time processing when it is not delayed for a predetermined time, and improper time processing when an authentication signal received by another communication device is delayed for a predetermined time with respect to a predetermined reference It is an apparatus.
  • the present invention performs wireless communication with another communication device, and performs appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate, in cooperation with another communication device.
  • a communication device for keyless entry device comprising: a receiving unit for receiving at least one authentication signal from another communication device; and in cooperation with another communication device, the authentication signal received by the receiving unit is a predetermined standard
  • the keyless entry device communication which performs proper time processing when there is no delay with respect to the predetermined time, and performs incorrect time processing when the authentication signal received by the reception unit is delayed with respect to a predetermined reference for a predetermined time It is an apparatus.
  • the present invention relates to a keyless entry device that performs proper processing when wireless communication between the first communication device and the second communication device is proper and improper processing when the wireless communication is inappropriate.
  • a control method comprising: wireless transmission of at least one authentication signal by a first communication device; reception of at least one authentication signal by a second communication device; reception by a second communication device Processing is performed when at least one authentication signal to be transmitted is not delayed for a predetermined time with respect to a predetermined reference, and at least one authentication signal received by the second communication device is received for a predetermined time with respect to the predetermined reference It is a control method of the keyless entry device which performs an improper process when it is delayed.
  • the keyless entry device the communication device for keyless entry device, and the control method of the keyless entry device of the present invention, it is possible to prevent fraud in a short time with high accuracy and simple configuration.
  • the keyless entry device 100 includes a first communication device 200 (in-vehicle device) and a second communication device 300 (mobile device).
  • the first communication device 200 is mounted on a vehicle 400.
  • the second communication device 300 is movable and, for example, carried by a driver who is inside or outside the vehicle 400.
  • the first communication device 200 uses wireless communication with the second communication device 300 to determine whether the second communication device 300 is present near the vehicle 400, for example, locking the door of the vehicle 400 And perform an operation such as unlocking.
  • the first communication device 200 includes an LF transmission unit 210, an RF transmission unit 220, an RF reception unit 230, a processing unit 240, and a storage unit 250.
  • the LF transmission unit 210 has an LF transmission driver 211 and an LF transmission antenna 212.
  • the LF transmission driver 211 uses the sine wave of the first frequency as a carrier wave to generate the exemplary LF signal 510 shown in FIG. 3A and transmits it through the LF transmission antenna 212 shown in FIG.
  • the LF signal 510 shown in FIG. 3A includes an information signal 511, an intensity measurement signal 512, and a first authentication signal 513.
  • the information signal 511 transmits information such as a start signal and various commands between the first communication device 200 and the second communication device 300 as in the related art.
  • the intensity measurement signal 512 transmits a signal for measuring the distance between the first communication device 200 and the second communication device 300 as in the prior art.
  • the first authentication signal 513 continues for a predetermined period of time with a constant maximum intensity.
  • the RF transmission unit 220 shown in FIG. 1 has an RF transmission driver 221 and an RF transmission antenna 222.
  • the RF transmission driver 221 generates the exemplary RF signal 520 shown in FIG. 3B by using the sine wave of the second frequency shown in FIG. 3B as a carrier, and transmits it through the RF transmission antenna 222 shown in FIG. .
  • the RF signal 520 shown in FIG. 3B includes a second authentication signal 521.
  • the second authentication signal 521 continues for a predetermined period of time with a constant maximum intensity.
  • the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) are transmitted at the same timing in the present embodiment. However, as described later, other timing may be used as long as the second communication device 300 can measure the delay of the first authentication signal 513 (FIG. 3A) with respect to the second authentication signal 521 (FIG. 3B).
  • the LF transmit antenna 212 and the RF transmit antenna 222 are mounted at different positions of the vehicle 400 shown in FIG.
  • the LF transmitting antenna 212 and the RF transmitting antenna 222 are, for example, but not limited to, a first position 401 between a driver's seat and a front passenger's seat, a second position 402 in a vehicle rear door, a rear right side door It is mounted at either its third position 403 or its fourth position 404 in the rear left door.
  • the RF reception unit 230 includes an RF reception driver 231 and an RF reception antenna 232.
  • the RF reception driver 231 receives the response RF signal transmitted from the second communication device 300 through the RF reception antenna 232, and reads information from the received response RF signal.
  • the RF receiver 230 is mounted at an appropriate position (not shown) of the vehicle 400 shown in FIG.
  • the processing unit 240 illustrated in FIG. 1 is, for example, a central processing unit.
  • the storage unit 250 is, for example, a random access memory.
  • the processing unit 240 reads the program stored in the storage unit 250 and executes various processes.
  • the processing unit 240 cooperates with the processing unit 340 of the second communication device 300 to perform an appropriate processing when wireless communication is appropriate and an improper processing when wireless communication is inappropriate.
  • the processing unit 240 instructs the LF transmission driver 211 to generate the LF signal 510 (FIG. 3A), and instructs the RF transmission driver 221 to generate the RF signal 520 (FIG. 3B).
  • the processing unit 240 receives information in the response RF signal from the RF reception driver 231. Details of the operation of the processing unit 240 will be described later.
  • the second communication apparatus 300 includes an LF reception unit 310, an RF reception unit 320, an RF transmission unit 330, a processing unit 340, and a storage unit 350.
  • the LF reception unit 310 includes an LF reception driver 311 and an LF reception antenna 312.
  • the LF reception driver 311 receives the LF signal 510 (FIG. 3A) transmitted from the first communication device 200 through the LF reception antenna 312.
  • the RF receiving unit 320 includes an RF receiving driver 321 and an RF receiving antenna 322.
  • the RF reception driver 321 receives the RF signal 520 (FIG. 3B) transmitted from the first communication device 200 through the RF reception antenna 322.
  • the RF transmission unit 330 has an RF transmission driver 331 and an RF transmission antenna 332.
  • the RF transmission driver 331 generates a response RF signal and transmits it through the RF transmission antenna 332.
  • the processing unit 340 is, for example, a central processing unit.
  • the storage unit 350 is, for example, a random access memory.
  • the processing unit 340 reads the program stored in the storage unit 350 and executes various processes.
  • the processing unit 340 cooperates with the processing unit 240 of the first communication device 200 to perform appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate. Details of the operation of the processing unit 340 will be described later.
  • the keyless entry device 100 is executed by the conventional keyless entry device, such as measuring the distance between the first communication device 200 and the second communication device 300 based on the intensity measurement signal 512 (FIG. 3A). Other processing may be performed, but the description is omitted.
  • step 601 the first communication device 200 (in-vehicle device) shown in FIG. 1 transmits the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) at the same timing. .
  • the LF transmission driver 211 generates a first authentication signal 513 (FIG. 3A) and transmits it from the LF transmission antenna 212. Furthermore, according to the instruction of the processing unit 240, the RF transmission driver 221 generates a second authentication signal 521 (FIG. 3B) and transmits it from the RF transmission antenna 222.
  • the start / end point of the first authentication signal 513 (FIG. 3A) and the start / end point of the second authentication signal 521 (FIG. 3B) are the same timing. If the delay between the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) can be measured, then the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 The transmission timing with (FIG. 3B) may be different from this. For example, at least one of the start time and end time of the first authentication signal 513 (FIG. 3A) is the same timing as at least one of the start time and end time of the second authentication signal 521 (FIG. 3B) It is also good.
  • step 602 the LF receiver 310 of the second communication device 300 (portable device) shown in FIG. 1 receives the first authentication signal 513 (FIG. 3A), and the RF receiver 320 Authentication signal 521 (FIG. 3B).
  • step 603 the processing unit 340 of the second communication device 300 receives the first received authentication signal 513 (FIG. 3A) based on the received second authentication signal 521 (FIG. 3B). It is determined whether the delay of D satisfies the predetermined condition.
  • the delay satisfies a predetermined condition. .
  • at least one of the start time and end time of the first authentication signal 513 (FIG. 3A) and at least one of the start time and end time of the second authentication signal 521 (FIG. 3B). Misalignment or other timing may be used.
  • step 604 at least one of the first communication device 200 and the second communication device 300 in FIG. 1 is appropriate when wireless communication is appropriate. Do the processing.
  • the appropriate time process of the present embodiment includes returning a conventional response from the second communication device 300 to the first communication device 200.
  • the first communication device 200 transmits a signal for permitting locking or unlocking of the door to a control unit (not shown) of the vehicle 400. If the delay satisfies the predetermined condition, there is a high possibility that the wireless communication between the first communication device 200 and the second communication device 300 shown in FIG. 1 is properly performed. Therefore, there is a high possibility that the conventional communication may be continued to unlock the door.
  • the appropriate time process may be various other processes performed when the wireless communication is appropriate.
  • the processing when appropriate may include sending information from the second communication device 300 to the first communication device 200 indicating that wireless communication is appropriate. Receiving this information, for example, the first communication device 200 transmits to the vehicle 400 a signal for permitting the unlocking or unlocking of the door.
  • step 605 it is determined in step 605 that at least one of the first communication device 200 and the second communication device 300 in FIG. Perform an inappropriate process.
  • Inappropriate-time processing of the present embodiment includes not returning a response from the second communication device 300 to the first communication device 200. Since the first communication device 200 does not receive a response, it does not allow the control unit (not shown) of the vehicle 400 to lock or unlock the door. If the delay does not satisfy the predetermined condition, there is a high possibility that someone is involved in the wireless communication between the first communication device 200 and the second communication device 300 shown in FIG. Therefore, by not making a response, it is possible to prevent an unfair action such as locking or unlocking of an undesirable door by a suspicious person.
  • Inappropriate processing may be various other processing performed when wireless communication is inappropriate.
  • the non-appropriate process may include sending, from the second communication device 300 to the first communication device 200, information indicating that the wireless communication is improper.
  • the first communication device 200 transmits, for example, an alarm mediated by a suspicious person to a control unit (not shown) of the vehicle 400.
  • the receivable range of the LF signal 510 transmitted from the first communication device 200 is about several meters from the vehicle 400.
  • the second communication device 300 receives the LF from the first communication device 200.
  • the signal 510 and the RF signal 520 are directly received, and the response RF signal 713 is returned to the first communication device 200.
  • the second communication device 300 when the second communication device 300 exists outside the receivable range of the LF signal 510 transmitted from the first communication device 200, if there is no fraud, the second communication device 300 performs Directly receives the RF signal 520 from the communication device 200, but does not receive the LF signal 510 directly because the distance is long. As a result, no response is returned from the second communication device 300 to the first communication device 200. In this case, since there is a high possibility that the driver is not present near the vehicle 400, the first communication device 200 does not perform appropriate processing such as unlocking of the door, thereby preventing theft or the like.
  • the second communication device 300 exists outside the receivable range of the LF signal 510 transmitted from the first communication device 200, if there is a fraud, it is transmitted from the first communication device 200.
  • the LF signal 510 may reach the second communication device 300.
  • the first unauthorized relay device 701 receives the LF signal 510 transmitted from the first communication device 200.
  • the first unauthorized relay station 701 converts the received LF signal 510 into a relay RF signal 711 and transmits it to a distant place.
  • the second fraudulent relay station 702 receives the relay RF signal 711.
  • the second unauthorized relay station 702 reproduces the same waveform as the LF signal 510 from the received relay RF signal 711 and transmits it as a reproduced LF signal 712.
  • the conventional first unauthorized relay device 701 and the second unauthorized relay device 702 transmit LF signals from the first communication device 200.
  • the signal 510 can be easily reproduced as the reproduced LF signal 712. Therefore, when the second communication device 300 receives the illegally reproduced reproduced LF signal 712, it may misidentify that the first communication device 200 exists nearby, and may transmit a normal response RF signal 713. . Since the response RF signal 713 reaches far compared to the LF signal 510, it can easily reach the first communication device 200 that is further than the receivable range of the LF signal 510. In the prior art, the first communication device 200 that has received a normal response from the second communication device 300 may allow the unlocking of the door despite the presence of unauthorized relay.
  • the first communication device 200 transmits the RF signal 520 at the same timing as the LF signal 510. It is difficult for the conventional first unauthorized repeater 701 and the second unauthorized repeater 702 suitable for single frequency reproduction to simultaneously reproduce the LF signal 510 and the RF signal 520 having different frequencies. In general, the first unauthorized relay station 701 and the second unauthorized relay station 702 which relay the LF signal 510 often can not reproduce the RF signals 520 having largely different frequencies. In order for the first unauthorized repeater 701 and the second unauthorized repeater 702 to reproduce the LF signal and the RF signal, the complex first unauthorized repeater 701 and the second unauthorized repeater 702 are required. So with difficulties.
  • the keyless entry device 100 of the present embodiment it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, by transmitting signals of different frequencies, it is possible to make reproduction by an unauthorized relay difficult. In addition, it is possible to prevent the processing at the appropriate time when there is a fraud. In addition, by explicitly indicating that wireless communication is inappropriate, it is possible to clearly execute an inappropriate time process.
  • a predetermined condition For example, when the first communication device 200 and the second communication device 300 share time with a radio clock or the like, the timing for transmitting the LF signal is selected based on the time, and the selected time is notified. Alternatively, it may be determined whether the delay of the LF signal from the selected time satisfies a predetermined condition.
  • FIG. 6 is a block diagram of a second communication device 800 according to a modification of the present invention.
  • the second communication apparatus 800 of the modification has a configuration similar to that of the second communication apparatus 300 of FIG. 1, but includes a processing unit 830 instead of the processing unit 340.
  • the processing unit 830 functions as a transfer unit 831 by executing a program stored in the storage unit 350.
  • the transfer unit 831 transmits, from the RF transmission unit 330, information on the waveform of the LF signal received by the LF reception unit 310 and information on the waveform of the RF signal received by the RF reception unit 320.
  • the transfer unit 831 transmits digital information of the sampled LF signal and RF signal.
  • the transfer unit 831 may transmit other information related to the LF signal and the RF signal.
  • the processing unit 240 of the first communication device 200 of FIG. 1 has a predetermined delay of the LF signal received by the second communication device 800 based on the information transmitted from the second communication device 800 of the modification. Determine if the condition is met.
  • the transfer unit 831 may transmit time information of the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) to the first communication device 200.
  • the processing unit 240 of the first communication device 200 may determine whether the delay of the LF signal received by the second communication device 800 satisfies a predetermined condition, based on the time information.
  • the time information is information on the reception timing of the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B).
  • the time information is at least one of the start time point and the end time point of the first authentication signal 513 (FIG. 3A) and the start time point and the end time of the second authentication signal 521 (FIG. 3B).
  • the time information includes at least one of the start time and end time of the first authentication signal 513 (FIG. 3A) and at least one of the start time and end time of the second authentication signal 521 (FIG. 3B). Deviation, or delay.
  • the time information is the delay of the first authentication signal 513 (FIG. 3A) with respect to a predetermined reference.
  • the configuration of the second communication device 300 can be simplified.
  • the present invention is applicable to a keyless entry device that performs locking and unlocking by wireless communication.
  • First communication device 210 LF transmission unit 211 LF transmission driver 212 LF transmission antenna 220 RF transmission unit 221 RF transmission driver 222 RF transmission antenna 230 RF reception unit 231 RF Reception driver 232 RF reception antenna 240 Processing unit 250 Storage unit 300
  • Second communication device 310 LF reception unit 311 LF reception driver 312 RF reception antenna 320 RF reception unit 321 RF reception driver 322 RF Receiving antenna 330 RF transmitting unit 331 RF transmitting driver 332 RF transmitting antenna 340 processing unit 350 storage unit 400 vehicle 401 first position 402 second position 403 third position 404 fourth Position 510 ... first LF signal 511 ... information signal 512 ... for measuring intensity No.
  • first authentication signal 520 second LF signal 521: second authentication signal 701: first unauthorized relay device 702: second unauthorized relay device 711: relay RF signal 712: reproduced LF signal 714: Response RF signal 800 ... second communication device 830 ... processing unit 831 ... transfer unit

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Abstract

A first communication device 200 comprises a low frequency (LF) transmitter 210 that wirelessly transmits a first authentication signal 513, and a transmitter 220 that wirelessly transmits a second authentication signal 521. A second communication device 300 comprises a LF receiver 310 that receives the first authentication signal 513, and a radio frequency (RF) receiver 320 that receives the second authentication signal 521. A processing unit 240 of the first communication device 200 is linked to a processing unit 340 of the second communication device 300 to perform suitable-time processing when at least one authentication signal received by the receiver of the second communication device is not delayed for a prescribed time with respect to prescribed reference and perform unsuitable-time processing when at least one authentication signal received by the receiver of the second communication device is delayed for the prescribed time with respect to the prescribed reference.

Description

キーレスエントリー装置、キーレスエントリー装置用通信装置及びキーレスエントリー装置の制御方法Keyless entry device, communication device for keyless entry device, and control method of keyless entry device

　本発明は、キーレスエントリー装置、キーレスエントリー装置用通信装置及びキーレスエントリー装置の制御方法に関するものである。 The present invention relates to a keyless entry device, a communication device for keyless entry device, and a control method of the keyless entry device.

　車両に搭載された車載機と運転手が持ち歩く携帯機との間で無線通信を行うことにより、携帯機が車両から一定の範囲に存在することが確認された場合に車両のドアの施錠を解錠するなどの処理を行うキーレスエントリー装置がある。 By performing wireless communication between the on-vehicle device mounted on the vehicle and the portable device carried by the driver, the door lock of the vehicle is unlocked when it is confirmed that the portable device is within a certain range from the vehicle. There is a keyless entry device that performs processing such as locking.

　従来のキーレスエントリー装置は、車載機から携帯機への無線通信に、ＬＦ（ｌｏｗ　ｆｒｅｑｕｅｎｃｙ）信号を使用し、携帯機から車載機への無線通信に、ＲＦ（ｒａｄｉｏ　ｆｒｅｑｕｅｎｃｙ）信号を使用する場合がある。ＬＦ信号を使用する無線通信では、数ｍ程度の距離では十分に通信可能であるが、それよりも遠い距離では通信が困難である。ＬＦ信号の搬送波は、例えば、数百ｋＨｚの正弦波である。ＲＦ信号を使用する無線通信では、数十ｍ～数百ｍ程度の距離まで正常に通信できる。ＲＦ信号の搬送波は、例えば、４２６ＭＨｚ～４２９ＭＨｚの正弦波である。 Conventional keyless entry devices use low frequency (LF) signals for wireless communication from in-vehicle devices to portable devices, and may use RF (radio frequency) signals for wireless communication from portable devices to in-vehicle devices. is there. In wireless communication using LF signals, although communication is sufficiently possible at a distance of several meters, communication is difficult at distances farther than that. The carrier wave of the LF signal is, for example, a sine wave of several hundreds kHz. In wireless communication using an RF signal, communication can be normally performed to a distance of several tens m to several hundreds m. The carrier wave of the RF signal is, for example, a sine wave of 426 MHz to 429 MHz.

　例えば、車両と携帯機との距離がＬＦ信号の受信可能範囲内であるとき、携帯機からの応答に基づいて車載機が車両の制御ユニットにドアの解錠を許可する。一方、携帯機が、車載機から送信されるＬＦ信号の受信可能範囲よりも離れている場合、通常は、携帯機からの応答が車載機に返らないので、ドアの解錠は許可されない。 For example, when the distance between the vehicle and the portable device is within the range in which the LF signal can be received, the on-vehicle device permits the control unit of the vehicle to unlock the door based on the response from the portable device. On the other hand, when the portable device is further than the receivable range of the LF signal transmitted from the in-vehicle device, the door unlocking is not permitted since the response from the portable device is not returned to the in-vehicle device.

　しかし、第１の不正中継機が車載機の近くでＬＦ信号を傍受し、ＬＦ信号の波形情報をＲＦ信号で送信し、第２の不正中継機が携帯機の近くでＲＦ信号からＬＦ信号を再現して送信するリレーアタックが知られている。リレーアタックが行われると、車載機から送信されるＬＦ信号が、ＬＦ信号の受信可能範囲よりも離れている携帯機にも届く。すると、携帯機が車載機の近くにあると誤認して通常の応答を車載機に返すので、車載機が、車両のドアの解錠を許可するという問題がある。 However, the first unauthorized repeater intercepts the LF signal near the in-vehicle device, transmits the waveform information of the LF signal as an RF signal, and the second unauthorized repeater intercepts the LF signal from the RF signal near the portable device. A relay attack that reproduces and transmits is known. When a relay attack is performed, the LF signal transmitted from the in-vehicle device also reaches the portable device which is farther than the receivable range of the LF signal. Then, since the portable device is falsely recognized as being in the vicinity of the in-vehicle device and the normal response is returned to the in-vehicle device, there is a problem that the in-vehicle device permits unlocking of the door of the vehicle.

　特許文献１に開示されているように、車載機から送信されるＬＦ信号の強度を変化させるキーレスエントリー装置が知られている。性能の悪い不正中継機は、ＬＦ信号の強度の変化を再現できないことが多いので、携帯機でＬＦ信号の強度の変化を検知することにより、リレーアタックの有無を検知して不正を防止することができる。 As disclosed in Patent Document 1, there is known a keyless entry device that changes the strength of an LF signal transmitted from an on-vehicle device. Since a rogue repeater with poor performance often can not reproduce changes in the strength of the LF signal, the presence of a relay attack is detected to prevent fraud by detecting changes in the strength of the LF signal with the portable device. Can.

　特許文献２に開示されている無線キーシステムでは、車載機から送信される信号の搬送波の周波数が、各時点では一つであるが、経時的に変更される。変更した周波数は、車載機と携帯機との間で事前に通知される。性能の悪い不正中継機は、経時的に変更される周波数に追従できないことが多いので、携帯機で、各時点に対応する周波数の信号強度を測定することで、リレーアタックの有無を検知して不正を防止することができる。 In the wireless key system disclosed in Patent Document 2, the frequency of the carrier wave of the signal transmitted from the in-vehicle device is temporally changed, although it is one at each time. The changed frequency is notified in advance between the in-vehicle device and the portable device. Since a rogue repeater with poor performance often can not follow the frequency that changes over time, the portable unit measures the signal strength of the frequency corresponding to each time to detect the presence or absence of a relay attack. It is possible to prevent fraud.

特開２０１０－１８５１８６Unexamined-Japanese-Patent No. 2010-185186 特開２００８－２４０３１５Patent document 1: JP 2008-240315

　しかしながら、最近、ＬＦ信号の強度の変化を再現できる不正中継機が出現しているので、特許文献１のキーレスエントリー装置では、リレーアタックの有無を検知できない可能性があるという不利益がある。 However, recently, since an unauthorized repeater capable of reproducing a change in strength of the LF signal has appeared, the keyless entry device of Patent Document 1 has a disadvantage that it may not be possible to detect the presence or absence of a relay attack.

　特許文献２の無線キーシステムは、使用する周波数の通知が必要であるので装置が複雑となることに加え、信号強度を複数回測定する必要であるので判別時間が長くかかるという不利益がある。 The wireless key system of Patent Document 2 requires the notification of the frequency to be used, and in addition to the complexity of the device, the signal strength needs to be measured a plurality of times, which has a disadvantage of taking a long determination time.

　本発明はかかる事情に鑑みてなされたものであり、その目的は、短時間で高精度に簡潔な構成で不正を防止できるキーレスエントリー装置、キーレスエントリー装置用通信装置及びキーレスエントリー装置の制御方法を提供することにある。 The present invention has been made in view of the above circumstances, and its object is to provide a keyless entry device, a keyless entry device communication device, and a keyless entry device control method capable of preventing fraud with a simple configuration with high accuracy and short time. It is to provide.

　本発明は、無線通信する第１の通信装置と第２の通信装置とを備え、無線通信が適正である場合の適正時処理と無線通信が不適正である場合の不適正時処理とを行う、キーレスエントリー装置であって、第１の通信装置が、少なくとも１の認証信号を無線送信する送信部を含み、第２の通信装置が、少なくとも１の認証信号を受信する受信部を含み、第１の通信装置と第２の通信装置との少なくとも一方が、処理部をさらに含み、処理部が、第２の通信装置の受信部で受信される少なくとも１の認証信号が所定の基準に対して所定時間遅れていない場合に適正時処理を行い、第２の通信装置の受信部で受信される少なくとも１の認証信号が所定の基準に対して所定時間遅れている場合に不適正時処理を行う、キーレスエントリー装置である。 The present invention includes a first communication device and a second communication device that perform wireless communication, and performs appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate. A keyless entry device, wherein the first communication device includes a transmitter configured to wirelessly transmit at least one authentication signal, and the second communication device includes a receiver configured to receive the at least one authentication signal; At least one of the first communication device and the second communication device further includes a processing unit, and the processing unit determines that at least one authentication signal received by the receiving unit of the second communication device is a predetermined reference. Perform the appropriate time process when not delayed for a predetermined time, and perform the incorrect time process when at least one authentication signal received by the receiving unit of the second communication device is delayed for a predetermined time with respect to a predetermined reference , Is a keyless entry device

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration.

　好適には本発明のキーレスエントリー装置は、第１の通信装置の送信部が、第１の周波数による第１の認証信号と、第１の周波数とは異なる第２の周波数による第２の認証信号とを送信し、第２の通信装置の受信部が、第１の認証信号と第２の認証信号とを受信し、処理部が、第２の通信装置の受信部で受信される第１の認証信号と第２の認証信号との一方が他方に対して所定時間遅れていない場合に適正時処理を行い、第２の通信装置の受信部で受信される第１の認証信号と第２の認証信号との一方が他方に対して所定時間遅れている場合に不適正時処理を行う。 Preferably, in the keyless entry device according to the present invention, the transmission unit of the first communication device is a first authentication signal with a first frequency, and a second authentication signal with a second frequency different from the first frequency. And the receiving unit of the second communication apparatus receives the first authentication signal and the second authentication signal, and the processing unit is received by the receiving unit of the second communication apparatus. A proper process is performed when one of the authentication signal and the second authentication signal is not delayed by a predetermined time with respect to the other, and the first authentication signal and the second authentication signal received by the receiving unit of the second communication device are processed. When one of the authentication signal and the other is delayed by a predetermined time with respect to the other, an improper processing is performed.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、異なる周波数の信号を送信することで、不正中継機による再現を困難にすることができる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, by transmitting signals of different frequencies, it is possible to make reproduction by an unauthorized relay difficult.

　好適には本発明のキーレスエントリー装置は、適正時処理が、第１の通信装置と第２の通信装置との無線通信を継続することを含み、不適正時処理が、第１の通信装置と第２の通信装置との無線通信を停止することを含む。 Preferably, in the keyless entry device according to the present invention, the in-appropriate process includes continuing wireless communication between the first communication apparatus and the second communication apparatus, and the inappropriate-time process includes the first communication apparatus Stopping the wireless communication with the second communication device.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、不正がある場合に適正時処理を行うことを防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, when there is a fraud, it is possible to prevent performing the appropriate processing.

　好適には本発明のキーレスエントリー装置は、第２の通信装置が、送信部をさらに含み、適正時処理が、第１の通信装置と第２の通信装置との無線通信が適切であることを示す情報を、第２の通信装置の送信部から送信することを含み、不適正時処理が、第１の通信装置と第２の通信装置との無線通信が不適切であることを示す情報を、第２の通信装置の送信部から送信することを含む。 Preferably, in the keyless entry device according to the present invention, the second communication device further includes a transmission unit, and the processing when appropriate indicates that wireless communication between the first communication device and the second communication device is appropriate. Including the transmission of the information indicating the transmission from the transmission unit of the second communication apparatus, and the improper processing includes information indicating that the wireless communication between the first communication apparatus and the second communication apparatus is inappropriate. , Transmitting from the transmitter of the second communication device.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、無線通信が不適切であることを明示的に示すことで、不適切時処理を明確に実行することができる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, by explicitly indicating that the wireless communication is inappropriate, it is possible to clearly execute the inappropriate process.

　好適には本発明のキーレスエントリー装置は、第２の通信装置が、送信部と、第２の通信装置の受信部で受信した認証信号の波形に関する情報を第２の通信装置の送信部から送信する転送部と、をさらに含み、第１の通信装置が、第２の通信装置の転送部から情報を受信する受信部と、処理部の少なくとも一部と、をさらに含み、第１の通信装置に含まれる処理部の少なくとも一部が、第１の通信装置で受信される情報に基づいて、適正時処理と不適正時処理とを行う。 Preferably, in the keyless entry device according to the present invention, the second communication device transmits information on the waveform of the authentication signal received by the transmitter and the receiver of the second communication device from the transmitter of the second communication device. A transfer unit, and the first communication device further includes a reception unit for receiving information from the transfer unit of the second communication device, and at least a part of the processing unit; At least a part of the processing units included in the unit performs the appropriate processing and the inappropriate processing based on the information received by the first communication device.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、第２の通信装置の構成を簡潔にしながら不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, tampering can be prevented while simplifying the configuration of the second communication device.

　好適には本発明のキーレスエントリー装置は、第２の通信装置が、送信部と、第２の通信装置の受信部で受信した認証信号の時間情報を第２の通信装置の送信部から送信する転送部と、をさらに含み、第１の通信装置が、第２の通信装置の転送部から時間情報を受信する受信部と、処理部の少なくとも一部と、をさらに含み、第１の通信装置に含まれる処理部の少なくとも一部が、第１の通信装置で受信される時間情報に基づいて、適正時処理と不適正時処理とを行う。 Preferably, in the keyless entry device according to the present invention, the second communication device transmits time information of the authentication signal received by the transmitting unit and the receiving unit of the second communication device from the transmitting unit of the second communication device. A transfer unit, and the first communication device further includes a reception unit for receiving time information from the transfer unit of the second communication device, and at least a part of the processing unit; At least a part of the processing units included in the processing unit perform the appropriate processing and the inappropriate processing based on the time information received by the first communication device.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、第２の通信装置の構成を簡潔にしながら不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, tampering can be prevented while simplifying the configuration of the second communication device.

　好適には本発明のキーレスエントリー装置は、時間情報が、第２の通信装置における認証信号の受信タイミングを示す。 Preferably, in the keyless entry device of the present invention, the time information indicates the reception timing of the authentication signal in the second communication device.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、第２の通信装置の構成を簡潔にしながら不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, tampering can be prevented while simplifying the configuration of the second communication device.

　好適には本発明のキーレスエントリー装置は、第１の通信装置が、複数の認証信号を送信し、時間情報が、少なくとも２つの認証信号間の受信タイミングのずれを示す。 Preferably, in the keyless entry device of the present invention, the first communication device transmits a plurality of authentication signals, and the time information indicates a deviation in reception timing between at least two authentication signals.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、第２の通信装置の構成を簡潔にしながら不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, tampering can be prevented while simplifying the configuration of the second communication device.

　本発明は、他の通信装置と無線通信して、無線通信が適正である場合の適正時処理と無線通信が不適正である場合の不適正時処理とを他の通信装置と連携して行う、キーレスエントリー装置用通信装置であって、少なくとも１の認証信号を無線送信する送信部を備え、他の通信装置と連携して、他の通信装置で受信される認証信号が所定の基準に対して所定時間遅れていない場合に適正時処理を行い、他の通信装置で受信される認証信号が所定の基準に対して所定時間遅れている場合に不適正時処理を行う、キーレスエントリー装置用通信装置である。 The present invention performs wireless communication with another communication device, and performs appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate, in cooperation with another communication device. A communication device for keyless entry device, comprising: a transmitter configured to wirelessly transmit at least one authentication signal; and in cooperation with another communication device, an authentication signal received by another communication device is compared with a predetermined reference Keyless entry device communication, which performs proper time processing when it is not delayed for a predetermined time, and improper time processing when an authentication signal received by another communication device is delayed for a predetermined time with respect to a predetermined reference It is an apparatus.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration.

　本発明は、他の通信装置と無線通信して、無線通信が適正である場合の適正時処理と無線通信が不適正である場合の不適正時処理とを他の通信装置と連携して行う、キーレスエントリー装置用通信装置であって、少なくとも１の認証信号を他の通信装置から受信する受信部を備え、他の通信装置と連携して、受信部で受信される認証信号が所定の基準に対して所定時間遅れていない場合に適正時処理を行い、受信部で受信される認証信号が所定の基準に対して所定時間遅れている場合に不適正時処理を行う、キーレスエントリー装置用通信装置である。 The present invention performs wireless communication with another communication device, and performs appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate, in cooperation with another communication device. A communication device for keyless entry device, comprising: a receiving unit for receiving at least one authentication signal from another communication device; and in cooperation with another communication device, the authentication signal received by the receiving unit is a predetermined standard The keyless entry device communication, which performs proper time processing when there is no delay with respect to the predetermined time, and performs incorrect time processing when the authentication signal received by the reception unit is delayed with respect to a predetermined reference for a predetermined time It is an apparatus.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration.

　本発明は、第１の通信装置と第２の通信装置との無線通信が適正である場合の適正時処理と無線通信が不適正である場合の不適正時処理とを行う、キーレスエントリー装置の制御方法であって、第１の通信装置により、少なくとも１の認証信号を無線送信することと、第２の通信装置により、少なくとも１の認証信号を受信することと、第２の通信装置で受信される少なくとも１の認証信号が所定の基準に対して所定時間遅れていない場合に適正時処理を行い、第２の通信装置で受信される少なくとも１の認証信号が所定の基準に対して所定時間遅れている場合に不適正時処理を行う、キーレスエントリー装置の制御方法である。 The present invention relates to a keyless entry device that performs proper processing when wireless communication between the first communication device and the second communication device is proper and improper processing when the wireless communication is inappropriate. A control method comprising: wireless transmission of at least one authentication signal by a first communication device; reception of at least one authentication signal by a second communication device; reception by a second communication device Processing is performed when at least one authentication signal to be transmitted is not delayed for a predetermined time with respect to a predetermined reference, and at least one authentication signal received by the second communication device is received for a predetermined time with respect to the predetermined reference It is a control method of the keyless entry device which performs an improper process when it is delayed.

　この構成によれば、短時間で高精度に簡潔な構成で不正を防止できる。 According to this configuration, it is possible to prevent fraud in a short time with high accuracy and a simple configuration.

　本発明のキーレスエントリー装置、キーレスエントリー装置用通信装置及びキーレスエントリー装置の制御方法によれば、短時間で高精度に簡潔な構成で不正を防止できる。 According to the keyless entry device, the communication device for keyless entry device, and the control method of the keyless entry device of the present invention, it is possible to prevent fraud in a short time with high accuracy and simple configuration.

本発明の実施形態のキーレスエントリー装置の構成図である。It is a block diagram of the keyless entry device of the embodiment of the present invention. 図１に示すキーレスエントリー装置を搭載した車両の概略図である。It is the schematic of the vehicle carrying the keyless entry apparatus shown in FIG. ＬＦ信号の波形図である。It is a wave form diagram of LF signal. ＲＦ信号の波形図である。It is a wave form diagram of RF signal. 図１に示すキーレスエントリー装置の制御方法のフロー図である。It is a flowchart of the control method of the keyless entry apparatus shown in FIG. 不正行為が行われた場合の図１に示すキーレスエントリー装置の動作を説明するための図である。It is a figure for demonstrating the operation | movement of the keyless entry apparatus shown in FIG. 1 when unauthorized activity is performed. 本発明の実施形態の変形例に係る第２の通信装置の構成図である。It is a block diagram of the 2nd communication apparatus which concerns on the modification of embodiment of this invention.

　以下、本発明の実施形態に係るキーレスエントリー装置１００について説明する。図１に示すように、キーレスエントリー装置１００は、第１の通信装置２００（車載機）と第２の通信装置３００（携帯機）とを備える。図２に示すように、第１の通信装置２００は、車両４００に搭載される。第２の通信装置３００は、移動可能であり、例えば、車両４００の内外にいる運転手に携帯されている。第１の通信装置２００は、第２の通信装置３００との無線通信を使用して、第２の通信装置３００が車両４００の近くに存在するか判断して、例えば、車両４００のドアの施錠及び解錠といった動作を行う。 Hereinafter, the keyless entry device 100 according to the embodiment of the present invention will be described. As shown in FIG. 1, the keyless entry device 100 includes a first communication device 200 (in-vehicle device) and a second communication device 300 (mobile device). As shown in FIG. 2, the first communication device 200 is mounted on a vehicle 400. The second communication device 300 is movable and, for example, carried by a driver who is inside or outside the vehicle 400. The first communication device 200 uses wireless communication with the second communication device 300 to determine whether the second communication device 300 is present near the vehicle 400, for example, locking the door of the vehicle 400 And perform an operation such as unlocking.

　図１に示すように、第１の通信装置２００は、ＬＦ送信部２１０とＲＦ送信部２２０とＲＦ受信部２３０と処理部２４０と記憶部２５０とを備える。 As shown in FIG. 1, the first communication device 200 includes an LF transmission unit 210, an RF transmission unit 220, an RF reception unit 230, a processing unit 240, and a storage unit 250.

　ＬＦ送信部２１０は、ＬＦ送信ドライバ２１１とＬＦ送信アンテナ２１２とを有する。ＬＦ送信ドライバ２１１は、第１の周波数の正弦波を搬送波として使用することで、図３Ａに示す例示的なＬＦ信号５１０を生成し、図１に示すＬＦ送信アンテナ２１２を通じて送信する。 The LF transmission unit 210 has an LF transmission driver 211 and an LF transmission antenna 212. The LF transmission driver 211 uses the sine wave of the first frequency as a carrier wave to generate the exemplary LF signal 510 shown in FIG. 3A and transmits it through the LF transmission antenna 212 shown in FIG.

　図３Ａに示すＬＦ信号５１０は、情報信号５１１と強度測定用信号５１２と第１の認証信号５１３とを含む。情報信号５１１は、従来のように、第１の通信装置２００と第２の通信装置３００との間で、起動信号、各種コマンドなどの情報を伝達する。強度測定用信号５１２は、従来のように、第１の通信装置２００と第２の通信装置３００との距離を測定するための信号を伝達する。第１の認証信号５１３は、一定の最大強度で、所定の期間にわたって継続する。 The LF signal 510 shown in FIG. 3A includes an information signal 511, an intensity measurement signal 512, and a first authentication signal 513. The information signal 511 transmits information such as a start signal and various commands between the first communication device 200 and the second communication device 300 as in the related art. The intensity measurement signal 512 transmits a signal for measuring the distance between the first communication device 200 and the second communication device 300 as in the prior art. The first authentication signal 513 continues for a predetermined period of time with a constant maximum intensity.

　図１に示すＲＦ送信部２２０は、ＲＦ送信ドライバ２２１とＲＦ送信アンテナ２２２とを有する。ＲＦ送信ドライバ２２１は、図３Ｂに示す第２の周波数の正弦波を搬送波として使用することで、図３Ｂに示す例示的なＲＦ信号５２０を生成し、図１に示すＲＦ送信アンテナ２２２を通じて送信する。 The RF transmission unit 220 shown in FIG. 1 has an RF transmission driver 221 and an RF transmission antenna 222. The RF transmission driver 221 generates the exemplary RF signal 520 shown in FIG. 3B by using the sine wave of the second frequency shown in FIG. 3B as a carrier, and transmits it through the RF transmission antenna 222 shown in FIG. .

　図３Ｂに示すＲＦ信号５２０は、第２の認証信号５２１を含む。第２の認証信号５２１は、一定の最大強度で、所定の期間にわたって継続する。第１の認証信号５１３（図３Ａ）と第２の認証信号５２１（図３Ｂ）とは、本実施形態では同じタイミングで送信される。ただし、後述するように第２の通信装置３００で、第２の認証信号５２１（図３Ｂ）に対する第１の認証信号５１３（図３Ａ）の遅延が測定できれば、他のタイミングであってもよい。 The RF signal 520 shown in FIG. 3B includes a second authentication signal 521. The second authentication signal 521 continues for a predetermined period of time with a constant maximum intensity. The first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) are transmitted at the same timing in the present embodiment. However, as described later, other timing may be used as long as the second communication device 300 can measure the delay of the first authentication signal 513 (FIG. 3A) with respect to the second authentication signal 521 (FIG. 3B).

　ＬＦ送信アンテナ２１２及びＲＦ送信アンテナ２２２は、図２に示す車両４００の、異なる位置に搭載される。ＬＦ送信アンテナ２１２及びＲＦ送信アンテナ２２２は、これらに限定はされないが、例えば、運転席と助手席との間の第１の位置４０１、車両後部のドア内の第２の位置４０２、後部右側ドア内の第３の位置４０３、及び、後部左側ドア内の第４の位置４０４のいずれかに搭載される。 The LF transmit antenna 212 and the RF transmit antenna 222 are mounted at different positions of the vehicle 400 shown in FIG. The LF transmitting antenna 212 and the RF transmitting antenna 222 are, for example, but not limited to, a first position 401 between a driver's seat and a front passenger's seat, a second position 402 in a vehicle rear door, a rear right side door It is mounted at either its third position 403 or its fourth position 404 in the rear left door.

　図１に示すように、ＲＦ受信部２３０は、ＲＦ受信ドライバ２３１とＲＦ受信アンテナ２３２とを有する。ＲＦ受信ドライバ２３１は、第２の通信装置３００から送信される応答ＲＦ信号を、ＲＦ受信アンテナ２３２を通じて受信して、受信した応答ＲＦ信号から情報を読み取る。ＲＦ受信部２３０は、図２に示す車両４００の適宜の位置（図示せず）に搭載される。 As shown in FIG. 1, the RF reception unit 230 includes an RF reception driver 231 and an RF reception antenna 232. The RF reception driver 231 receives the response RF signal transmitted from the second communication device 300 through the RF reception antenna 232, and reads information from the received response RF signal. The RF receiver 230 is mounted at an appropriate position (not shown) of the vehicle 400 shown in FIG.

　図１に示す処理部２４０は、例えば、中央処理装置である。記憶部２５０は、例えば、ランダムアクセスメモリである。処理部２４０は、記憶部２５０に記憶されたプログラムを読み出して各種処理を実行する。処理部２４０は、第２の通信装置３００の処理部３４０と連携して、無線通信が適正である場合の適正時処理と、無線通信が不適正である場合の不適正時処理とを行う。処理部２４０は、具体的には、ＬＦ送信ドライバ２１１に指示を出してＬＦ信号５１０（図３Ａ）を生成させ、ＲＦ送信ドライバ２２１に指示を出してＲＦ信号５２０（図３Ｂ）を生成させる。さらに、処理部２４０は、応答ＲＦ信号中の情報をＲＦ受信ドライバ２３１から受け取る。処理部２４０の動作の詳細については後述する。 The processing unit 240 illustrated in FIG. 1 is, for example, a central processing unit. The storage unit 250 is, for example, a random access memory. The processing unit 240 reads the program stored in the storage unit 250 and executes various processes. The processing unit 240 cooperates with the processing unit 340 of the second communication device 300 to perform an appropriate processing when wireless communication is appropriate and an improper processing when wireless communication is inappropriate. Specifically, the processing unit 240 instructs the LF transmission driver 211 to generate the LF signal 510 (FIG. 3A), and instructs the RF transmission driver 221 to generate the RF signal 520 (FIG. 3B). Further, the processing unit 240 receives information in the response RF signal from the RF reception driver 231. Details of the operation of the processing unit 240 will be described later.

　第２の通信装置３００は、ＬＦ受信部３１０とＲＦ受信部３２０とＲＦ送信部３３０と処理部３４０と記憶部３５０とを備える。 The second communication apparatus 300 includes an LF reception unit 310, an RF reception unit 320, an RF transmission unit 330, a processing unit 340, and a storage unit 350.

　ＬＦ受信部３１０は、ＬＦ受信ドライバ３１１とＬＦ受信アンテナ３１２とを含む。ＬＦ受信ドライバ３１１は、ＬＦ受信アンテナ３１２を通じて、第１の通信装置２００から送信されるＬＦ信号５１０（図３Ａ）を受信する。 The LF reception unit 310 includes an LF reception driver 311 and an LF reception antenna 312. The LF reception driver 311 receives the LF signal 510 (FIG. 3A) transmitted from the first communication device 200 through the LF reception antenna 312.

　ＲＦ受信部３２０は、ＲＦ受信ドライバ３２１とＲＦ受信アンテナ３２２とを含む。ＲＦ受信ドライバ３２１は、ＲＦ受信アンテナ３２２を通じて、第１の通信装置２００から送信されるＲＦ信号５２０（図３Ｂ）を受信する。 The RF receiving unit 320 includes an RF receiving driver 321 and an RF receiving antenna 322. The RF reception driver 321 receives the RF signal 520 (FIG. 3B) transmitted from the first communication device 200 through the RF reception antenna 322.

　ＲＦ送信部３３０は、ＲＦ送信ドライバ３３１とＲＦ送信アンテナ３３２とを有する。ＲＦ送信ドライバ３３１は、応答ＲＦ信号を生成して、ＲＦ送信アンテナ３３２を通じて送信する。 The RF transmission unit 330 has an RF transmission driver 331 and an RF transmission antenna 332. The RF transmission driver 331 generates a response RF signal and transmits it through the RF transmission antenna 332.

　処理部３４０は、例えば、中央処理装置である。記憶部３５０は、例えば、ランダムアクセスメモリである。処理部３４０は、記憶部３５０に記憶されたプログラムを読み出して各種処理を実行する。処理部３４０は、第１の通信装置２００の処理部２４０と連携して、無線通信が適正である場合の適正時処理と、無線通信が不適正である場合の不適正時処理とを行う。処理部３４０の動作の詳細については後述する。 The processing unit 340 is, for example, a central processing unit. The storage unit 350 is, for example, a random access memory. The processing unit 340 reads the program stored in the storage unit 350 and executes various processes. The processing unit 340 cooperates with the processing unit 240 of the first communication device 200 to perform appropriate processing when wireless communication is appropriate and improper processing when wireless communication is inappropriate. Details of the operation of the processing unit 340 will be described later.

　次に、図４のフロー６００を参照しながら、本実施形態のキーレスエントリー装置１００の制御方法について説明する。 Next, a control method of the keyless entry device 100 of the present embodiment will be described with reference to the flow 600 of FIG. 4.

　ここでは、第１の通信装置２００と第２の通信装置３００との間の無線通信に不正中継が介在する場合と介在しない場合との処理の違いについて詳細に説明する。なお、キーレスエントリー装置１００は、強度測定用信号５１２（図３Ａ）に基づいた、第１の通信装置２００と第２の通信装置３００との距離の測定など、従来のキーレスエントリー装置で実行される他の処理を実行してもよいが、説明は省略する。 Here, the difference in processing between the case where the unauthorized relay intervenes in the wireless communication between the first communication device 200 and the second communication device 300 and the case where it does not intervene will be described in detail. The keyless entry device 100 is executed by the conventional keyless entry device, such as measuring the distance between the first communication device 200 and the second communication device 300 based on the intensity measurement signal 512 (FIG. 3A). Other processing may be performed, but the description is omitted.

　まず、ステップ６０１で、図１に示す第１の通信装置２００（車載機）が、第１の認証信号５１３（図３Ａ）と第２の認証信号５２１（図３Ｂ）とを同じタイミングで送信する。 First, in step 601, the first communication device 200 (in-vehicle device) shown in FIG. 1 transmits the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) at the same timing. .

　具体的には、第１の通信装置２００の処理部２４０の指示により、ＬＦ送信ドライバ２１１が第１の認証信号５１３（図３Ａ）を生成して、ＬＦ送信アンテナ２１２から送信する。さらに、処理部２４０の指示により、ＲＦ送信ドライバ２２１が第２の認証信号５２１（図３Ｂ）を生成して、ＲＦ送信アンテナ２２２から送信する。 Specifically, according to an instruction of the processing unit 240 of the first communication device 200, the LF transmission driver 211 generates a first authentication signal 513 (FIG. 3A) and transmits it from the LF transmission antenna 212. Furthermore, according to the instruction of the processing unit 240, the RF transmission driver 221 generates a second authentication signal 521 (FIG. 3B) and transmits it from the RF transmission antenna 222.

　なお、第１の認証信号５１３（図３Ａ）の開始終了時点と第２の認証信号５２１（図３Ｂ）の開始終了時点とが同じタイミングである。第１の認証信号５１３（図３Ａ）と第２の認証信号５２１（図３Ｂ）との間の遅延が測定できるのであれば、第１の認証信号５１３（図３Ａ）と第２の認証信号５２１（図３Ｂ）との送信タイミングは、これと異なっていてもよい。例えば、第１の認証信号５１３（図３Ａ）の開始時点と終了時点との少なくとも一方が、第２の認証信号５２１（図３Ｂ）の開始時点と終了時点との少なくとも一方と同じタイミングであってもよい。 Note that the start / end point of the first authentication signal 513 (FIG. 3A) and the start / end point of the second authentication signal 521 (FIG. 3B) are the same timing. If the delay between the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) can be measured, then the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 The transmission timing with (FIG. 3B) may be different from this. For example, at least one of the start time and end time of the first authentication signal 513 (FIG. 3A) is the same timing as at least one of the start time and end time of the second authentication signal 521 (FIG. 3B) It is also good.

　次に、ステップ６０２で、図１に示す第２の通信装置３００（携帯機）のＬＦ受信部３１０が、第１の認証信号５１３（図３Ａ）を受信し、ＲＦ受信部３２０が、第２の認証信号５２１（図３Ｂ）を受信する。 Next, in step 602, the LF receiver 310 of the second communication device 300 (portable device) shown in FIG. 1 receives the first authentication signal 513 (FIG. 3A), and the RF receiver 320 Authentication signal 521 (FIG. 3B).

　次に、ステップ６０３で、第２の通信装置３００の処理部３４０は、受信された第２の認証信号５２１（図３Ｂ）を基準とした、受信された第１の認証信号５１３（図３Ａ）の遅延が、所定の条件を満たすかを判定する。 Next, in step 603, the processing unit 340 of the second communication device 300 receives the first received authentication signal 513 (FIG. 3A) based on the received second authentication signal 521 (FIG. 3B). It is determined whether the delay of D satisfies the predetermined condition.

　具体的には、第１の認証信号５１３（図３Ａ）が第２の認証信号５２１（図３Ｂ）に対して、所定時間遅れていなければ、遅延が所定の条件を満たしていると判定される。なお、遅延を測定するため、第１の認証信号５１３（図３Ａ）の開始時点と終了時点との少なくとも一方と、第２の認証信号５２１（図３Ｂ）の開始時点と終了時点との少なくとも一方とのずれ、またはその他のタイミングが使用されもよい。 Specifically, if the first authentication signal 513 (FIG. 3A) is not delayed by a predetermined time with respect to the second authentication signal 521 (FIG. 3B), it is determined that the delay satisfies a predetermined condition. . Note that in order to measure the delay, at least one of the start time and end time of the first authentication signal 513 (FIG. 3A) and at least one of the start time and end time of the second authentication signal 521 (FIG. 3B). Misalignment or other timing may be used.

　第１の認証信号５１３（図３Ａ）と第２の認証信号５２１（図３Ｂ）との一方の無線通信に不正な中継が介在している場合には、介在している側に遅延が生じるので、遅延を測定することにより不正な中継の介在を確認できる。 In the case where an unauthorized relay intervenes in one of the wireless communications of the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B), a delay occurs on the intervening side. By measuring the delay, it is possible to confirm the presence of unauthorized relay.

　ステップ６０３の判定で遅延が所定の条件を満たす場合、ステップ６０４で、図１の第１の通信装置２００と第２の通信装置３００との少なくとも一方が、無線通信が適正である場合の適正時処理を行う。 If the delay satisfies the predetermined condition in the determination of step 603, then, in step 604, at least one of the first communication device 200 and the second communication device 300 in FIG. 1 is appropriate when wireless communication is appropriate. Do the processing.

　本実施形態の適正時処理は、第２の通信装置３００から第１の通信装置２００に従来通りの応答を返すことを含む。第１の通信装置２００は、応答を受けて、ドアの施錠又は解錠を許可する信号を車両４００の制御ユニット（図示せず）に送信する。遅延が所定の条件を満たしている場合、図１に示す第１の通信装置２００と第２の通信装置３００との無線通信が適正に行われている可能性が高い。従って、従来通りの通信を継続してドアを解錠してよい可能性が高い。 The appropriate time process of the present embodiment includes returning a conventional response from the second communication device 300 to the first communication device 200. In response to the response, the first communication device 200 transmits a signal for permitting locking or unlocking of the door to a control unit (not shown) of the vehicle 400. If the delay satisfies the predetermined condition, there is a high possibility that the wireless communication between the first communication device 200 and the second communication device 300 shown in FIG. 1 is properly performed. Therefore, there is a high possibility that the conventional communication may be continued to unlock the door.

　適正時処理は、無線通信が適正である場合に行われる他の様々な処理であってもよい。例えば、適正時処理は、第２の通信装置３００から第１の通信装置２００に、無線通信が適正であることを示す情報を送ることを含んでもよい。この情報を受けて、例えば、第１の通信装置２００は、ドアの解錠または解錠を許可する信号を車両４００に送信する。 The appropriate time process may be various other processes performed when the wireless communication is appropriate. For example, the processing when appropriate may include sending information from the second communication device 300 to the first communication device 200 indicating that wireless communication is appropriate. Receiving this information, for example, the first communication device 200 transmits to the vehicle 400 a signal for permitting the unlocking or unlocking of the door.

　ステップ６０３の判定で遅延が所定の条件を満たさない場合、ステップ６０５で、図１の第１の通信装置２００と第２の通信装置３００との少なくとも一方が、無線通信が不適正である場合の不適正時処理を行う。 In the case where the delay does not satisfy the predetermined condition in the determination of step 603, it is determined in step 605 that at least one of the first communication device 200 and the second communication device 300 in FIG. Perform an inappropriate process.

　本実施形態の不適正時処理は、第２の通信装置３００から第１の通信装置２００に応答を返さないことを含む。第１の通信装置２００は、応答を受けないので、車両４００の制御ユニット（図示せず）にドアの施錠も解錠も許可しない。遅延が所定の条件を満たしていない場合、図１に示す第１の通信装置２００と第２の通信装置３００との無線通信に、何者かが介在している可能性が高い。従って、応答を行わないことにより、不審者による望ましくないドアの施錠または解錠などの不正行為を防ぐことができる。 Inappropriate-time processing of the present embodiment includes not returning a response from the second communication device 300 to the first communication device 200. Since the first communication device 200 does not receive a response, it does not allow the control unit (not shown) of the vehicle 400 to lock or unlock the door. If the delay does not satisfy the predetermined condition, there is a high possibility that someone is involved in the wireless communication between the first communication device 200 and the second communication device 300 shown in FIG. Therefore, by not making a response, it is possible to prevent an unfair action such as locking or unlocking of an undesirable door by a suspicious person.

　不適正時処理は、無線通信が不適正である場合に行われる他の様々な処理であってもよい。例えば、不適正時処理は、第２の通信装置３００から第１の通信装置２００に、無線通信が不適正であることを示す情報を送ることを含んでもよい。この情報を受けて、第１の通信装置２００は、例えば、不審者が介在している警報を車両４００の制御ユニット（図示せず）に送信する。 Inappropriate processing may be various other processing performed when wireless communication is inappropriate. For example, the non-appropriate process may include sending, from the second communication device 300 to the first communication device 200, information indicating that the wireless communication is improper. In response to the information, the first communication device 200 transmits, for example, an alarm mediated by a suspicious person to a control unit (not shown) of the vehicle 400.

　ここで、図５を参照しながら、第１の通信装置２００（車載機）と第２の通信装置３００（携帯機）との無線通信が不適正である場合の一例について説明する。 Here, an example of the case where the wireless communication between the first communication device 200 (in-vehicle device) and the second communication device 300 (portable device) is inappropriate will be described with reference to FIG. 5.

　第１の通信装置２００から送信されるＬＦ信号５１０の受信可能範囲は、車両４００から数ｍ程度である。第１の通信装置２００から送信されるＬＦ信号５１０の受信可能範囲の中に第２の通信装置３００が存在している場合、第２の通信装置３００は、第１の通信装置２００からのＬＦ信号５１０及びＲＦ信号５２０を直接受信して、第１の通信装置２００に応答ＲＦ信号７１３を返す。この場合は、車両４００の近くに運転手が存在する可能性が高いので、第１の通信装置２００がドアの解錠などの適正時処理を行っても、盗難などの問題が生じないことが多い。 The receivable range of the LF signal 510 transmitted from the first communication device 200 is about several meters from the vehicle 400. When the second communication device 300 exists in the receivable range of the LF signal 510 transmitted from the first communication device 200, the second communication device 300 receives the LF from the first communication device 200. The signal 510 and the RF signal 520 are directly received, and the response RF signal 713 is returned to the first communication device 200. In this case, there is a high possibility that a driver is present near the vehicle 400, so that problems such as theft do not occur even if the first communication device 200 performs appropriate processing such as door unlocking. There are many.

　一方、第１の通信装置２００から送信されるＬＦ信号５１０の受信可能範囲の外に第２の通信装置３００が存在している場合、不正がなければ、第２の通信装置３００は、第１の通信装置２００からのＲＦ信号５２０を直接受信するが、距離が遠いのでＬＦ信号５１０は直接受信しない。その結果、第２の通信装置３００から第１の通信装置２００に応答が返らない。この場合は、車両４００の近くに運転手が存在しない可能性が高いので、第１の通信装置２００がドアの解錠などの適正時処理を行わないことにより、盗難などを防ぐことができる。 On the other hand, when the second communication device 300 exists outside the receivable range of the LF signal 510 transmitted from the first communication device 200, if there is no fraud, the second communication device 300 performs Directly receives the RF signal 520 from the communication device 200, but does not receive the LF signal 510 directly because the distance is long. As a result, no response is returned from the second communication device 300 to the first communication device 200. In this case, since there is a high possibility that the driver is not present near the vehicle 400, the first communication device 200 does not perform appropriate processing such as unlocking of the door, thereby preventing theft or the like.

　しかし、第１の通信装置２００から送信されるＬＦ信号５１０の受信可能範囲の外に第２の通信装置３００が存在している場合でも、不正があると、第１の通信装置２００から送信されるＬＦ信号５１０が、第２の通信装置３００まで到達する場合がある。 However, even if the second communication device 300 exists outside the receivable range of the LF signal 510 transmitted from the first communication device 200, if there is a fraud, it is transmitted from the first communication device 200. The LF signal 510 may reach the second communication device 300.

　具体的には、図５に示すように第１の通信装置２００の近くで、第１の不正中継機７０１が、第１の通信装置２００から送信されるＬＦ信号５１０を受信する。第１の不正中継機７０１は、受信したＬＦ信号５１０を中継ＲＦ信号７１１に変換して遠くまで送信する。第２の通信装置３００の近くで、第２の不正中継機７０２が、中継ＲＦ信号７１１を受信する。第２の不正中継機７０２は、受信した中継ＲＦ信号７１１からＬＦ信号５１０と同じ波形を再現して再現ＬＦ信号７１２として送信する。 Specifically, as shown in FIG. 5, near the first communication device 200, the first unauthorized relay device 701 receives the LF signal 510 transmitted from the first communication device 200. The first unauthorized relay station 701 converts the received LF signal 510 into a relay RF signal 711 and transmits it to a distant place. Near the second communication device 300, the second fraudulent relay station 702 receives the relay RF signal 711. The second unauthorized relay station 702 reproduces the same waveform as the LF signal 510 from the received relay RF signal 711 and transmits it as a reproduced LF signal 712.

　従来のように第１の通信装置２００からＬＦ信号５１０だけが送信される場合、従来の第１の不正中継機７０１及び第２の不正中継機７０２は、第１の通信装置２００からのＬＦ信号５１０を簡単に再現ＬＦ信号７１２として再現できる。従って、第２の通信装置３００は、不正に再現された再現ＬＦ信号７１２を受信すると、第１の通信装置２００が近くに存在すると誤認して、正常な応答ＲＦ信号７１３を送信するおそれがある。応答ＲＦ信号７１３は、ＬＦ信号５１０に比べると遠くまで到達するので、ＬＦ信号５１０の受信可能範囲以上に離れた第１の通信装置２００にも届きやすい。従来技術では、第２の通信装置３００から正常な応答を受けた第１の通信装置２００は、不正な中継があるにもかかわらず、ドアの解錠を許可するおそれがある。 When only the LF signal 510 is transmitted from the first communication device 200 as in the related art, the conventional first unauthorized relay device 701 and the second unauthorized relay device 702 transmit LF signals from the first communication device 200. The signal 510 can be easily reproduced as the reproduced LF signal 712. Therefore, when the second communication device 300 receives the illegally reproduced reproduced LF signal 712, it may misidentify that the first communication device 200 exists nearby, and may transmit a normal response RF signal 713. . Since the response RF signal 713 reaches far compared to the LF signal 510, it can easily reach the first communication device 200 that is further than the receivable range of the LF signal 510. In the prior art, the first communication device 200 that has received a normal response from the second communication device 300 may allow the unlocking of the door despite the presence of unauthorized relay.

　一方、本実施形態の場合、第１の通信装置２００は、ＬＦ信号５１０と同じタイミングでＲＦ信号５２０を送信する。単一周波数の再現に適した従来の第１の不正中継機７０１及び第２の不正中継機７０２は、周波数の異なるＬＦ信号５１０とＲＦ信号５２０とを同時に再現することが難しい。一般に、ＬＦ信号５１０を中継する第１の不正中継機７０１及び第２の不正中継機７０２は、周波数の大きく異なるＲＦ信号５２０は再現できないことが多い。第１の不正中継機７０１及び第２の不正中継機７０２がＬＦ信号とＲＦ信号とを再現するためには、複雑な第１の不正中継機７０１及び第２の不正中継機７０２が必要となるので、困難が伴う。 On the other hand, in the case of the present embodiment, the first communication device 200 transmits the RF signal 520 at the same timing as the LF signal 510. It is difficult for the conventional first unauthorized repeater 701 and the second unauthorized repeater 702 suitable for single frequency reproduction to simultaneously reproduce the LF signal 510 and the RF signal 520 having different frequencies. In general, the first unauthorized relay station 701 and the second unauthorized relay station 702 which relay the LF signal 510 often can not reproduce the RF signals 520 having largely different frequencies. In order for the first unauthorized repeater 701 and the second unauthorized repeater 702 to reproduce the LF signal and the RF signal, the complex first unauthorized repeater 701 and the second unauthorized repeater 702 are required. So with difficulties.

　第１の通信装置２００からＬＦ信号５１０とＲＦ信号５２０とが同時に送信された場合、第１の不正中継機７０１及び第２の不正中継機７０２を経由しないＲＦ信号５２０に比べて、第１の不正中継機７０１及び第２の不正中継機７０２を経由した再現ＬＦ信号７１２に遅延が発生する。基準となるＲＦ信号５２０に対する再現ＬＦ信号７１２の遅延は、不正の介在により正常時より長く、所定の条件を満たさない。従って、第２の通信装置３００は、応答ＲＦ信号７１４を第１の通信装置２００に返さない。従って、不審者による望ましくないドアの施錠または解錠などの不正行為を防ぐことができる。 When the LF signal 510 and the RF signal 520 are simultaneously transmitted from the first communication device 200, compared with the RF signal 520 not passing through the first unauthorized relay device 701 and the second unauthorized relay device 702, A delay occurs in the reproduced LF signal 712 passing through the unauthorized relay device 701 and the second unauthorized relay device 702. The delay of the reproduced LF signal 712 with respect to the reference RF signal 520 is longer than normal due to the presence of an incorrect signal and does not satisfy the predetermined condition. Therefore, the second communication device 300 does not return the response RF signal 714 to the first communication device 200. Therefore, it is possible to prevent an unfair act such as locking or unlocking of an undesired door by a suspicious person.

　本実施形態のキーレスエントリー装置１００によれば、短時間で高精度に簡潔な構成で不正を防止できる。特に、異なる周波数の信号を送信することで、不正中継機による再現を困難にすることができる。また、不正がある場合に適正時処理を行うことを防止できる。また、無線通信が不適切であることを明示的に示すことで、不適切時処理を明確に実行することができる。 According to the keyless entry device 100 of the present embodiment, it is possible to prevent fraud in a short time with high accuracy and a simple configuration. In particular, by transmitting signals of different frequencies, it is possible to make reproduction by an unauthorized relay difficult. In addition, it is possible to prevent the processing at the appropriate time when there is a fraud. In addition, by explicitly indicating that wireless communication is inappropriate, it is possible to clearly execute an inappropriate time process.

　なお、本実施形態では、第１の通信装置２００から送信されるＲＦ信号を基準としたときの、第１の通信装置２００から送信されるＬＦ信号の遅延が所定の条件を満たすか判定しているが、不正な中継による信号の遅延を検知できる別の基準が使用されてもよい。例えば、第１の通信装置２００と第２の通信装置３００が電波時計などで時刻を共有している場合、ＬＦ信号を送信するタイミングを時刻に基づいて選択し、選択された時刻を通知しておき、その選択した時刻からのＬＦ信号の遅延が所定の条件を満たすかを判定してもよい。 In the present embodiment, it is determined whether the delay of the LF signal transmitted from the first communication device 200 based on the RF signal transmitted from the first communication device 200 satisfies a predetermined condition. However, other criteria may be used that can detect signal delays due to unauthorized relaying. For example, when the first communication device 200 and the second communication device 300 share time with a radio clock or the like, the timing for transmitting the LF signal is selected based on the time, and the selected time is notified. Alternatively, it may be determined whether the delay of the LF signal from the selected time satisfies a predetermined condition.

　図６は、本発明の変形例に係る第２の通信装置８００の構成図である。変形例の第２の通信装置８００は、図１の第２の通信装置３００と同様の構成をもつが、処理部３４０の代わりに処理部８３０を備える。処理部８３０は、記憶部３５０に記憶されるプログラムを実行することにより転送部８３１として機能する。転送部８３１は、ＬＦ受信部３１０で受信されるＬＦ信号の波形に関する情報、及び、ＲＦ受信部３２０で受信されるＲＦ信号の波形に関する情報を、ＲＦ送信部３３０から送信する。具体的には、転送部８３１は、サンプリングしたＬＦ信号及びＲＦ信号のデジタル情報を送信する。転送部８３１は、ＬＦ信号及びＲＦ信号に関する他の情報を送信してもよい。 FIG. 6 is a block diagram of a second communication device 800 according to a modification of the present invention. The second communication apparatus 800 of the modification has a configuration similar to that of the second communication apparatus 300 of FIG. 1, but includes a processing unit 830 instead of the processing unit 340. The processing unit 830 functions as a transfer unit 831 by executing a program stored in the storage unit 350. The transfer unit 831 transmits, from the RF transmission unit 330, information on the waveform of the LF signal received by the LF reception unit 310 and information on the waveform of the RF signal received by the RF reception unit 320. Specifically, the transfer unit 831 transmits digital information of the sampled LF signal and RF signal. The transfer unit 831 may transmit other information related to the LF signal and the RF signal.

　図１の第１の通信装置２００の処理部２４０は、変形例の第２の通信装置８００から送信される情報に基づいて、第２の通信装置８００で受信されたＬＦ信号の遅延が所定の条件を満たすかを判定する。 The processing unit 240 of the first communication device 200 of FIG. 1 has a predetermined delay of the LF signal received by the second communication device 800 based on the information transmitted from the second communication device 800 of the modification. Determine if the condition is met.

　なお、転送部８３１は、第１の認証信号５１３（図３Ａ）及び第２の認証信号５２１（図３Ｂ）の時間情報を第１の通信装置２００に送信してもよい。その場合、第１の通信装置２００の処理部２４０は、時間情報に基づいて、第２の通信装置８００で受信されたＬＦ信号の遅延が所定の条件を満たすかを判定してもよい。時間情報は、第１の認証信号５１３（図３Ａ）及び第２の認証信号５２１（図３Ｂ）の受信タイミングに関する情報である。例えば、時間情報は、第１の認証信号５１３（図３Ａ）の開始時点と終了時点との少なくとも一方と、第２の認証信号５２１（図３Ｂ）の開始時点と終了時点とである。例えば、時間情報は、第１の認証信号５１３（図３Ａ）の開始時点と終了時点との少なくとも一方と、第２の認証信号５２１（図３Ｂ）の開始時点と終了時点との少なくとも一方とのずれ、すなわち遅延である。例えば、時間情報は、所定の基準に対する第１の認証信号５１３（図３Ａ）の遅延である。 The transfer unit 831 may transmit time information of the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B) to the first communication device 200. In that case, the processing unit 240 of the first communication device 200 may determine whether the delay of the LF signal received by the second communication device 800 satisfies a predetermined condition, based on the time information. The time information is information on the reception timing of the first authentication signal 513 (FIG. 3A) and the second authentication signal 521 (FIG. 3B). For example, the time information is at least one of the start time point and the end time point of the first authentication signal 513 (FIG. 3A) and the start time point and the end time of the second authentication signal 521 (FIG. 3B). For example, the time information includes at least one of the start time and end time of the first authentication signal 513 (FIG. 3A) and at least one of the start time and end time of the second authentication signal 521 (FIG. 3B). Deviation, or delay. For example, the time information is the delay of the first authentication signal 513 (FIG. 3A) with respect to a predetermined reference.

　本変形例のキーレスエントリー装置によれば、図１のキーレスエントリー装置１００の効果に加えて、第２の通信装置３００の構成を簡単にすることができる。 According to the keyless entry device of this modification, in addition to the effects of the keyless entry device 100 of FIG. 1, the configuration of the second communication device 300 can be simplified.

　本発明は上述した実施形態には限定されない。すなわち、当業者は、本発明の技術的範囲又はその均等の範囲内において、上述した実施形態の構成要素に関し、様々な変更、コンビネーション、サブコンビネーション、並びに代替を行ってもよい。 The present invention is not limited to the embodiments described above. That is, those skilled in the art may make various modifications, combinations, subcombinations, and substitutions within the technical scope of the present invention or equivalent components thereof regarding the components of the above-described embodiment.

　本発明は、無線通信により施錠及び解錠を行うキーレスエントリー装置に適用可能である。 The present invention is applicable to a keyless entry device that performs locking and unlocking by wireless communication.

１００…キーレスエントリー装置
２００…第１の通信装置
２１０…ＬＦ送信部
２１１…ＬＦ送信ドライバ
２１２…ＬＦ送信アンテナ
２２０…ＲＦ送信部
２２１…ＲＦ送信ドライバ
２２２…ＲＦ送信アンテナ
２３０…ＲＦ受信部
２３１…ＲＦ受信ドライバ
２３２…ＲＦ受信アンテナ
２４０…処理部
２５０…記憶部
３００…第２の通信装置
３１０…ＬＦ受信部
３１１…ＬＦ受信ドライバ
３１２…ＬＦ受信アンテナ
３２０…ＲＦ受信部
３２１…ＲＦ受信ドライバ
３２２…ＲＦ受信アンテナ
３３０…ＲＦ送信部
３３１…ＲＦ送信ドライバ
３３２…ＲＦ送信アンテナ
３４０…処理部
３５０…記憶部
４００…車両
４０１…第１の位置
４０２…第２の位置
４０３…第３の位置
４０４…第４の位置
５１０…第１のＬＦ信号
５１１…情報信号
５１２…強度測定用信号
５１３…第１の認証信号
５２０…第２のＬＦ信号
５２１…第２の認証信号
７０１…第１の不正中継機
７０２…第２の不正中継機
７１１…中継ＲＦ信号
７１２…再現ＬＦ信号
７１４…応答ＲＦ信号
８００…第２の通信装置
８３０…処理部
８３１…転送部 100 Keyless entry device 200 First communication device 210 LF transmission unit 211 LF transmission driver 212 LF transmission antenna 220 RF transmission unit 221 RF transmission driver 222 RF transmission antenna 230 RF reception unit 231 RF Reception driver 232 RF reception antenna 240 Processing unit 250 Storage unit 300 Second communication device 310 LF reception unit 311 LF reception driver 312 RF reception antenna 320 RF reception unit 321 RF reception driver 322 RF Receiving antenna 330 RF transmitting unit 331 RF transmitting driver 332 RF transmitting antenna 340 processing unit 350 storage unit 400 vehicle 401 first position 402 second position 403 third position 404 fourth Position 510 ... first LF signal 511 ... information signal 512 ... for measuring intensity No. 513: first authentication signal 520: second LF signal 521: second authentication signal 701: first unauthorized relay device 702: second unauthorized relay device 711: relay RF signal 712: reproduced LF signal 714: Response RF signal 800 ... second communication device 830 ... processing unit 831 ... transfer unit

Claims (11)

　無線通信する第１の通信装置と第２の通信装置とを備え、前記無線通信が適正である場合の適正時処理と前記無線通信が不適正である場合の不適正時処理とを行う、キーレスエントリー装置であって、
　前記第１の通信装置が、少なくとも１の認証信号を無線送信する送信部を含み、
　前記第２の通信装置が、前記少なくとも１の認証信号を受信する受信部を含み、
　前記第１の通信装置と前記第２の通信装置との少なくとも一方が、処理部をさらに含み、　前記処理部が、
　　前記第２の通信装置の前記受信部で受信される前記少なくとも１の認証信号が所定の基準に対して所定時間遅れていない場合に前記適正時処理を行い、
　　前記第２の通信装置の前記受信部で受信される前記少なくとも１の認証信号が前記所定の基準に対して前記所定時間遅れている場合に前記不適正時処理を行う、
　キーレスエントリー装置。 Keyless comprising a first communication device and a second communication device for performing wireless communication, performing appropriate processing when the wireless communication is appropriate and inappropriate processing when the wireless communication is inappropriate An entry device,
The first communication device includes a transmitter configured to wirelessly transmit at least one authentication signal;
The second communication device includes a receiver that receives the at least one authentication signal;
At least one of the first communication device and the second communication device further includes a processing unit, and the processing unit includes:
Performing the correctness process when the at least one authentication signal received by the reception unit of the second communication device is not delayed for a predetermined time with respect to a predetermined reference;
Performing the non-appropriate-time process when the at least one authentication signal received by the receiving unit of the second communication device is delayed by the predetermined time with respect to the predetermined reference;
Keyless entry device. 　前記第１の通信装置の前記送信部が、第１の周波数による第１の認証信号と、前記第１の周波数とは異なる第２の周波数による第２の認証信号とを送信し、
　前記第２の通信装置の前記受信部が、前記第１の認証信号と前記第２の認証信号とを受信し、
　前記処理部が、
　　前記第２の通信装置の前記受信部で受信される前記第１の認証信号と前記第２の認証信号との一方が他方に対して所定時間遅れていない場合に前記適正時処理を行い、
　　前記第２の通信装置の前記受信部で受信される前記第１の認証信号と前記第２の認証信号との前記一方が前記他方に対して前記所定時間遅れている場合に前記不適正時処理を行う、
　請求項１のキーレスエントリー装置。 The transmission unit of the first communication device transmits a first authentication signal with a first frequency and a second authentication signal with a second frequency different from the first frequency,
The receiving unit of the second communication device receives the first authentication signal and the second authentication signal,
The processing unit
The appropriateness process is performed when one of the first authentication signal and the second authentication signal received by the reception unit of the second communication device is not delayed by a predetermined time with respect to the other,
Inappropriate-time processing when the one of the first authentication signal and the second authentication signal received by the reception unit of the second communication device is delayed by the predetermined time with respect to the other I do,
The keyless entry device according to claim 1. 　前記適正時処理が、前記第１の通信装置と前記第２の通信装置との前記無線通信を継続することを含み、
　前記不適正時処理が、前記第１の通信装置と前記第２の通信装置との前記無線通信を停止することを含む、
　請求項１または請求項２のキーレスエントリー装置。 The proper processing includes continuing the wireless communication between the first communication device and the second communication device;
The improper processing includes stopping the wireless communication between the first communication device and the second communication device.
The keyless entry device according to claim 1 or 2. 　前記第２の通信装置が、送信部をさらに含み、
　前記適正時処理が、前記第１の通信装置と前記第２の通信装置との前記無線通信が適切であることを示す情報を、前記第２の通信装置の前記送信部から送信することを含み、
　前記不適正時処理が、前記第１の通信装置と前記第２の通信装置との前記無線通信が不適切であることを示す情報を、前記第２の通信装置の前記送信部から送信することを含む、
　請求項１から請求項３のいずれかのキーレスエントリー装置。 The second communication device further includes a transmitter;
The appropriate time processing includes transmitting, from the transmission unit of the second communication device, information indicating that the wireless communication between the first communication device and the second communication device is appropriate. ,
The improper time process transmits, from the transmission unit of the second communication device, information indicating that the wireless communication between the first communication device and the second communication device is inappropriate. including,
The keyless entry device according to any one of claims 1 to 3. 　前記第２の通信装置が、
　　送信部と、
　　前記第２の通信装置の前記受信部で受信した前記認証信号の波形に関する情報を前記第２の通信装置の前記送信部から送信する転送部と、をさらに含み、
　前記第１の通信装置が、
　　第２の通信装置の前記転送部から前記情報を受信する受信部と、
　　前記処理部の少なくとも一部と、をさらに含み、
　前記第１の通信装置に含まれる前記処理部の前記少なくとも一部が、前記第１の通信装置で受信される前記情報に基づいて、前記適正時処理と前記不適正時処理とを行う、
　請求項１から請求項４のいずれかのキーレスエントリー装置。 The second communication device is
A transmitter,
And a transfer unit for transmitting information on the waveform of the authentication signal received by the reception unit of the second communication device from the transmission unit of the second communication device,
The first communication device is
A receiving unit for receiving the information from the transfer unit of the second communication device;
And at least a portion of the processing unit;
The at least part of the processing unit included in the first communication device performs the in-appropriate-time process and the in-appropriate-time process based on the information received by the first communication device.
The keyless entry device according to any one of claims 1 to 4. 　前記第２の通信装置が、
　　送信部と、
　　前記第２の通信装置の前記受信部で受信した前記認証信号の時間情報を前記第２の通信装置の前記送信部から送信する転送部と、をさらに含み、
　前記第１の通信装置が、
　　第２の通信装置の前記転送部から前記時間情報を受信する受信部と、
　　前記処理部の少なくとも一部と、をさらに含み、
　前記第１の通信装置に含まれる前記処理部の前記少なくとも一部が、前記第１の通信装置で受信される前記時間情報に基づいて、前記適正時処理と前記不適正時処理とを行う、
　請求項１から請求項５のいずれかのキーレスエントリー装置。 The second communication device is
A transmitter,
And a transfer unit for transmitting time information of the authentication signal received by the reception unit of the second communication device from the transmission unit of the second communication device,
The first communication device is
A receiving unit for receiving the time information from the transfer unit of the second communication device;
And at least a portion of the processing unit;
The at least part of the processing unit included in the first communication device performs the in-appropriate process and the in-appropriate process based on the time information received by the first communication device.
The keyless entry device according to any one of claims 1 to 5. 　前記時間情報が、前記第２の通信装置における前記認証信号の受信タイミングを示す、
　請求項６のキーレスエントリー装置。 The time information indicates the reception timing of the authentication signal in the second communication device.
The keyless entry device according to claim 6. 　前記第１の通信装置が、複数の前記認証信号を送信し、
　前記時間情報が、少なくとも２つの前記認証信号間の受信タイミングのずれを示す、
　請求項６のキーレスエントリー装置。 The first communication device transmits a plurality of the authentication signals;
The time information indicates a deviation in reception timing between at least two of the authentication signals,
The keyless entry device according to claim 6. 　他の通信装置と無線通信して、前記無線通信が適正である場合の適正時処理と前記無線通信が不適正である場合の不適正時処理とを前記他の通信装置と連携して行う、キーレスエントリー装置用通信装置であって、
　少なくとも１の認証信号を無線送信する送信部を備え、
　前記他の通信装置と連携して、
　　前記他の通信装置で受信される前記認証信号が所定の基準に対して所定時間遅れていない場合に前記適正時処理を行い、
　　前記他の通信装置で受信される前記認証信号が前記所定の基準に対して前記所定時間遅れている場合に前記不適正時処理を行う、
　キーレスエントリー装置用通信装置。 The wireless communication with another communication device is performed in cooperation with the other communication device to perform an appropriate processing when the wireless communication is appropriate and an improper processing when the wireless communication is incorrect. A communication device for a keyless entry device,
A transmitter configured to wirelessly transmit at least one authentication signal;
In cooperation with the other communication device,
If the authentication signal received by the other communication device is not delayed for a predetermined time with respect to a predetermined reference, the appropriate time process is performed,
Performing the non-appropriate-time process when the authentication signal received by the other communication device is delayed for the predetermined time with respect to the predetermined reference;
Communication device for keyless entry device. 　他の通信装置と無線通信して、前記無線通信が適正である場合の適正時処理と前記無線通信が不適正である場合の不適正時処理とを前記他の通信装置と連携して行う、キーレスエントリー装置用通信装置であって、
　少なくとも１の認証信号を前記他の通信装置から受信する受信部を備え、
　前記他の通信装置と連携して、
　　前記受信部で受信される前記認証信号が所定の基準に対して所定時間遅れていない場合に前記適正時処理を行い、
　　前記受信部で受信される前記認証信号が前記所定の基準に対して前記所定時間遅れている場合に前記不適正時処理を行う、
　キーレスエントリー装置用通信装置。 The wireless communication with another communication device is performed in cooperation with the other communication device to perform an appropriate processing when the wireless communication is appropriate and an improper processing when the wireless communication is incorrect. A communication device for a keyless entry device,
A receiver configured to receive at least one authentication signal from the other communication device;
In cooperation with the other communication device,
If the authentication signal received by the reception unit is not delayed for a predetermined time with respect to a predetermined reference, the appropriate time process is performed,
Performing the non-appropriate process when the authentication signal received by the receiving unit is delayed by the predetermined time with respect to the predetermined reference;
Communication device for keyless entry device. 　第１の通信装置と第２の通信装置との無線通信が適正である場合の適正時処理と前記無線通信が不適正である場合の不適正時処理とを行う、キーレスエントリー装置の制御方法であって、
　前記第１の通信装置により、少なくとも１の認証信号を無線送信することと、
　前記第２の通信装置により、前記少なくとも１の認証信号を受信することと、
　前記第２の通信装置で受信される前記少なくとも１の認証信号が所定の基準に対して所定時間遅れていない場合に前記適正時処理を行い、
　前記第２の通信装置で受信される前記少なくとも１の認証信号が前記所定の基準に対して前記所定時間遅れている場合に前記不適正時処理を行う、
　キーレスエントリー装置の制御方法。 A control method of a keyless entry device, which performs an appropriate process when wireless communication between the first communication apparatus and the second communication apparatus is appropriate and an improper process when the wireless communication is inappropriate. There,
Wirelessly transmitting at least one authentication signal by the first communication device;
Receiving the at least one authentication signal by the second communication device;
Performing the correctness process when the at least one authentication signal received by the second communication device is not delayed for a predetermined time with respect to a predetermined reference,
Performing the non-appropriate-time process when the at least one authentication signal received by the second communication device is delayed by the predetermined time with respect to the predetermined reference;
Control method of keyless entry device.
PCT/JP2016/070159 2015-07-17 2016-07-07 Keyless entry device, communication device for keyless entry devices, and control method for keyless entry devices Ceased WO2017014059A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003191824A (en) * 2001-12-26 2003-07-09 Toyota Motor Corp In-vehicle device remote control system
JP2011208463A (en) * 2010-03-30 2011-10-20 Denso Corp On-vehicle wireless communication system
JP2013245468A (en) * 2012-05-25 2013-12-09 Nippon Soken Inc Smart system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003191824A (en) * 2001-12-26 2003-07-09 Toyota Motor Corp In-vehicle device remote control system
JP2011208463A (en) * 2010-03-30 2011-10-20 Denso Corp On-vehicle wireless communication system
JP2013245468A (en) * 2012-05-25 2013-12-09 Nippon Soken Inc Smart system

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