WO2017047228A1 - Portable terminal device authentication system, on-board device, and portable terminal device - Google Patents
Portable terminal device authentication system, on-board device, and portable terminal device Download PDFInfo
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- WO2017047228A1 WO2017047228A1 PCT/JP2016/071534 JP2016071534W WO2017047228A1 WO 2017047228 A1 WO2017047228 A1 WO 2017047228A1 JP 2016071534 W JP2016071534 W JP 2016071534W WO 2017047228 A1 WO2017047228 A1 WO 2017047228A1
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- WIPO (PCT)
- Prior art keywords
- signal
- vehicle
- unit
- portable
- authentication
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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
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- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/44—Program or device authentication
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- 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 mobile terminal device authentication system, an in-vehicle device, and a mobile terminal device.
- the received signal strength varies depending on the distance between the in-vehicle device and the mobile terminal device.
- the received signal of the mobile terminal device may be saturated.
- the mobile terminal device receives a signal to be subjected to authentication processing from the in-vehicle device and detects that the reception intensity of a predetermined portion of the signal is saturated, the reception intensity is saturated.
- a communication system in which an in-vehicle device is notified and the in-vehicle device retransmits at least a predetermined portion of the transmission intensity in response to the notification (see, for example, Patent Document 1).
- the response of the authentication process may be delayed compared to the case where the retransmission control is not performed, and the operability may be reduced.
- the aspect which concerns on this invention is made
- a mobile terminal device authentication system is configured to transmit a request signal to an in-vehicle side transmission unit that transmits a signal, an in-vehicle side reception unit that receives a signal, and the in-vehicle side transmission unit.
- a vehicle-mounted device that determines an answer signal received by the vehicle-mounted receiver, a vehicle-mounted device that receives the signal, a portable receiver that receives the signal, a portable transmitter that transmits the signal, and the portable device
- a portable terminal device having a portable side control unit that controls the portable side transmission unit to transmit an answer signal to the request signal in response to the reception unit receiving the request signal, and The in-vehicle side control unit causes the in-vehicle side transmission unit to transmit a signal including a plurality of authentication signals set so as to have different received signal strengths as the request signal.
- the reception sensitivity characteristic can be adjusted by control, the signal transmitted by the in-vehicle side transmission unit is received as the request signal, and the portable side control unit receives the authentication signal received by the portable side reception unit. Instructing the reception sensitivity characteristic of the portable-side receiver based on the intensity value, the plurality of authentication signals received after the reception sensitivity characteristic of the portable-side receiver is adjusted to the instructed reception sensitivity characteristic The in-vehicle side control unit or the portable side control unit determines whether or not the portable side receiving unit is a communication in which a normal request signal is received based on the determination results of the plurality of authentication signals. .
- the in-vehicle side control unit causes the in-vehicle side transmission unit to transmit a signal including a plurality of authentication signals set so that the received signal strengths are different as the request signal.
- the portable-side receiving unit can adjust the reception sensitivity characteristic by control, and receives the signal transmitted by the in-vehicle-side transmitting unit as the request signal.
- the portable side control unit instructs the reception sensitivity characteristic of the portable side reception unit based on the strength value of the authentication signal received by the portable side reception unit, and the portable side reception unit The plurality of authentication signals received after the reception sensitivity characteristic is adjusted are discriminated.
- the vehicle-mounted side control unit or the mobile side control unit determines whether or not the mobile side reception unit is a communication that has received a normal request signal based on the determination results of the plurality of authentication signals. As a result, the mobile terminal device authentication system can improve the security of authentication.
- the portable side control unit may cause the portable side transmission unit to transmit the answer signal including the discrimination results of the plurality of authentication signals.
- the mobile terminal device authentication system can improve the security of authentication as in the above configuration. Further, the portable terminal device authentication system is instructed by the portable side control unit by instructing a reception sensitivity characteristic of the portable side receiving unit based on an intensity value of an authentication signal received by the portable side receiving unit. The plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver is adjusted to the received sensitivity characteristic, and the answer signal including the determination result of the plurality of authentication signals is determined in the portable transmitter By transmitting to, it is possible to improve the accuracy of identification of a plurality of authentication signals.
- the portable side control unit is configured to receive the reception sensitivity of the portable side receiving unit adjusted based on an intensity value of an authentication signal received by the portable side receiving unit.
- the plurality of authentication signals may be received based on characteristics, the plurality of authentication signals may be determined based on the intensity value, and the answer signal may be transmitted to the portable-side transmission unit.
- the mobile terminal device authentication system can improve the security of authentication as in the above configuration. Further, the mobile terminal device authentication system is configured such that the plurality of mobile side receivers receive the plurality of the mobile side receivers based on reception sensitivity characteristics of the mobile side receivers adjusted based on an intensity value of an authentication signal received by the mobile side receivers. By receiving this authentication signal, it is possible to improve the accuracy of identification of a plurality of authentication signals.
- the on-vehicle side control unit compares the transmission time of the authentication signal with the determination result of the authentication signal, and Based on the result, it may be determined whether the signal received by the mobile terminal device is a regular request signal.
- the mobile terminal device authentication system can compare the transmission time of the authentication signal and the determination result of the authentication signal, the determination accuracy at the time of authentication can be improved.
- the authentication signal includes a first signal and a second signal having a signal strength smaller than that of the first signal.
- the portable-side control unit determines the authentication signal based on a first threshold that can identify the first signal and the second signal, and the number of times determined as the first signal;
- the answer signal including the information including the second signal and the number of times of determination as the determination result of the plurality of authentication signals is transmitted to the portable-side transmitter, and the in-vehicle-side controller is configured to
- the answer signal received by the in-vehicle-side receiving unit may be determined based on the information including the number of times determined as a signal of the first and the number of times determined as the second signal.
- the mobile terminal device authentication system can further increase the determination accuracy during authentication by performing signal determination based on the number of times.
- the authentication signal includes a first signal, a second signal having a signal strength smaller than that of the first signal, A third signal having a signal strength smaller than that of the second signal, and the portable control unit includes a first threshold that can distinguish the first signal from the second signal;
- the authentication signal is discriminated based on a second threshold that can discriminate between the second signal and the third signal, the number of times of discrimination from the first signal, and the number of times of discrimination from the second signal,
- the answer signal including the information including the third signal and the number of times of determination as the determination result of the plurality of authentication signals is transmitted to the portable-side transmitter, and the in-vehicle-side controller is The number of times determined to be a signal of 1 and the number of times determined to be a second signal were determined to be a third signal. Based on the information including the serial number, it may be determined the answer signal received by the vehicle-side receiving unit.
- the mobile terminal device authentication system can further increase the determination accuracy during authentication by performing signal determination based on the number of times.
- the signal received by the vehicle-mounted receiving unit is When it is determined that the reception sensitivity characteristic of the portable-side receiver is not in an appropriate state and the number of times determined as the second signal is 1 or more, the signal received by the in-vehicle receiver is You may make it determine with it being in an appropriate state with respect to the reception sensitivity characteristic of the said portable side receiving part.
- the mobile terminal device authentication system determines that the signal received by the in-vehicle side receiving unit is appropriate for the reception sensitivity characteristic of the mobile side receiving unit because it is determined as the second signal. It can be determined that it is in a state, and the determination accuracy at the time of authentication can be further increased.
- the in-vehicle-side control unit receives the portable-side reception based on the determination results of the plurality of authentication signals included in the answer signal. It may be determined whether the signal received by the unit is the request signal transmitted by the vehicle-mounted side transmission unit.
- the mobile terminal device authentication system performs authentication by determining whether or not the signal received by the mobile side receiver is a request signal transmitted by the in-vehicle side transmitter.
- the time determination accuracy can be further increased.
- the in-vehicle side control unit receives the in-vehicle side reception based on the determination results of the plurality of authentication signals included in the answer signal. It may be determined whether the signal received by the unit is the answer signal transmitted by the portable-side transmission unit.
- the mobile terminal device authentication system determines whether the signal received by the in-vehicle side receiving unit is the answer signal transmitted by the mobile side transmitting unit.
- the determination accuracy at the time of authentication can be further increased.
- the in-vehicle side control unit outputs the authentication signal having an irregularly determined transmission time from a predetermined pattern. You may make it make a transmission part transmit.
- the mobile terminal device authentication system improves the security of authentication by using an authentication signal of an irregularly determined transmission time among predetermined patterns for authentication processing. Can be made.
- An in-vehicle device includes an in-vehicle side transmission unit that transmits a request signal to a mobile terminal device, an in-vehicle side reception unit that receives a signal, and the request signal transmitted to the in-vehicle side transmission unit. And an in-vehicle side control unit that determines an answer signal transmitted from the mobile terminal device and received by the in-vehicle side reception unit, wherein the in-vehicle side control unit has different received signal strengths as the request signal A signal including a plurality of authentication signals set as described above is transmitted to the in-vehicle side transmission unit, and the in-vehicle side reception unit is based on an intensity value of the authentication signal received by the mobile terminal device.
- the vehicle-mounted side control unit receives the answer received by the vehicle-mounted side receiving unit based on the determination result of the plurality of authentication signals included in the signal received by the vehicle-mounted side receiving unit. From the signal, it is determined whether or not the signal received by the mobile terminal device is a regular request signal.
- the reception sensitivity characteristic of the mobile terminal device is adjusted based on the intensity value of the authentication signal, and the mobile terminal device receives the signal after the reception sensitivity characteristic of the mobile terminal device is adjusted.
- the in-vehicle side receiving unit receives the signal including the result of the determination of the plurality of authentication signals by the in-vehicle side receiving unit, so that the in-vehicle side control unit determines the plurality of authentication signals included in the signal received by the in-vehicle side receiving unit. Based on the result, it is possible to determine whether or not the signal received by the mobile terminal device is a regular request signal from the answer signal received by the in-vehicle side receiving unit.
- a mobile terminal device includes a mobile-side receiver that receives a request signal from an in-vehicle device, a mobile-side transmitter that transmits a signal, and the mobile-side receiver receives the request signal.
- a portable-side control unit that controls the portable-side transmission unit so as to transmit an answer signal corresponding to the request signal to the in-vehicle device in response to reception, the portable-side reception unit receiving sensitivity by control Characteristics can be adjusted, the request signal transmitted from the in-vehicle device is received, and the portable side control unit receives the portable side reception based on the strength value of the authentication signal received by the portable side reception unit
- a reception sensitivity characteristic of the receiver unit is instructed, and a plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver is adjusted to the instructed reception sensitivity characteristic are discriminated.
- the portable side control unit instructs the reception sensitivity characteristic of the portable side receiving unit based on the strength value of the authentication signal received by the portable side receiving unit, and is instructed.
- the plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver is adjusted to the reception sensitivity characteristic.
- a mobile terminal device authentication system an in-vehicle device, and a mobile terminal device that can improve the operability of authentication processing.
- FIG. 1 is a configuration diagram showing a mobile terminal device authentication system 1 according to the present embodiment.
- the mobile terminal device authentication system 1 shown in the figure is applied to a vehicle such as an automobile or a motorbike, and restricts the use of the vehicle when locked.
- the mobile terminal device authentication system 1 can drive a device corresponding to an object to be controlled such as locking, unlocking, or starting an engine by authenticating the mobile terminal device 200 without using a mechanical key.
- a power unit P including an engine E and a transmission (not shown) is swingably supported on a body frame of a scooter V that is a small vehicle, and a rear wheel WF that is driven by the power unit P is a rear portion of the power unit P. Is pivotally supported.
- driving is restricted (driving restricted state).
- a handle H is provided at the front of the body frame of the scooter V, and the handle H is supported via a connecting shaft so that the direction of the front wheel WR can be adjusted.
- the handle lock portion 16 includes an actuator unit 18 including a mechanism that limits the rotation of the connecting shaft.
- the power unit P is provided with a kick actuating portion 7 that can drive the generator G included in the power unit P when the kick pedal 6 is depressed.
- the scooter V can use the electric power obtained by generating power by the kick operation of the kick operation unit 7.
- the battery B is mounted on the scooter V, and the starting method of the power unit P is switched according to the charging state (terminal voltage) of the battery B.
- the electric power generated by the generator G is supplied to the battery B via the converter 8.
- the generator G is driven by the engine E.
- the battery B is charged by the electric power output from the generator G by depressing the kick pedal 6 of the kick operating unit 7.
- the converter 8 functions as a rectifier and a regulator.
- the electric power stored in the battery B may be supplied to the generator G, and the generator G may be used as a starter for the engine E.
- the converter 8 supplies power so that the generator G functions as a motor.
- ignition power (not shown) provided in the engine E is supplied from the ignition circuit 13 according to the state of the main relay (MRY) 12.
- Various restriction states include locking of the handle H and driving restriction of the power unit P.
- the in-vehicle device 100 includes a power source unit 20, an in-vehicle side control unit 30, an in-vehicle side transmission unit 40, an in-vehicle side reception unit 50, a drive circuit unit 61, an input circuit unit 62, and a main switch state acquisition unit 63.
- the main relay drive unit 64 is provided.
- the in-vehicle device 100 may be configured to include a starter driving unit 65.
- the power supply unit 20 uses the battery B or the generator G as a power source, stabilizes the terminal voltage of the battery B with reference to the voltage + Vreg, and supplies the stabilized voltage to each unit such as the in-vehicle control unit 30.
- Each unit such as the in-vehicle control unit 30 uses a stabilized DC voltage as a power source.
- the power supply unit 20 monitors the voltage drop below the predetermined threshold voltage VTH of the terminal voltage of the battery B, and outputs the detection result.
- the in-vehicle side transmission unit 40 transmits a request signal for calling the mobile terminal device 200.
- a signal transmitted from the in-vehicle side transmission unit 40 may be referred to as an LF signal.
- the request signal (LF signal)
- identification information for identifying the mobile terminal device 200 (hereinafter referred to as “mobile terminal device identification information”)
- a plurality of pieces of authentication processing information (hereinafter referred to as “authentication information”). )
- authentication information for identifying the mobile terminal device 200
- authentication information a plurality of pieces of authentication processing information
- the authentication information is not limited to only this information.
- fourth authentication information may be included.
- the authentication information is an example of an “authentication signal”.
- the first authentication information, the second authentication information, and the third authentication information are examples of “first signal”, “second signal”, and “third signal”.
- the in-vehicle side receiving unit 50 receives a signal transmitted by an external device.
- the in-vehicle side receiving unit 50 receives a signal transmitted by the mobile terminal device 200.
- a signal transmitted from the mobile terminal device 200 and received by the in-vehicle side receiving unit 50 may be referred to as an RF signal.
- the carrier frequency of the RF signal is relatively higher than the carrier frequency of the LF signal.
- the drive circuit unit 61 drives the actuator unit 18 while the main switch 11 is in a conductive state.
- the main switch 11 is turned on or off by a physical key.
- the actuator unit 18 is included in the handle lock unit 16 that locks the handle H in order to disable traveling of the vehicle, and switches between locking and unlocking of the handle lock unit 16.
- the drive circuit unit 61 drives the actuator unit 18 to unlock the handle H and keep the unlocked state.
- the drive circuit unit 61 drives the actuator unit 18 to lock the handle H and keep the locked state.
- the input circuit unit 62 receives a signal from the start switch 17.
- the start switch 17 is provided on the handle H, for example, and is operated by the occupant so as to be in an on state or an off state.
- the main switch state acquisition unit 63 acquires the conduction state of the main switch 11 that can be turned on according to the operation of the occupant.
- the main relay drive unit 64 switches between the on state and the off state of the main relay 14 under the control of the in-vehicle side control unit 30.
- the starter driving unit 65 supplies a driving signal for starting the power unit P under the control of the in-vehicle side control unit 30.
- the starter drive unit 65 supplies a drive signal when using the generator G as a starter of the engine E to the conversion unit 8.
- the in-vehicle side control unit 30 includes a start control unit 31, a communication control unit 32, a determination unit 33, a drive control unit 34, and a storage unit 35.
- Some or all of the start control unit 31, the communication control unit 32, the determination unit 33, and the drive control unit 34 are software functions that function when a processor such as a CPU (Central Processing Unit) executes a program. Part. In addition, some or all of these may be hardware function units such as LSI (Large Scale Integration) and ASIC (Application Specific Specific Integrated Circuit).
- the storage unit 35 is realized by a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), a flash memory, or the like.
- the program executed by the processor may be stored in advance in the storage unit 35 or may be downloaded from an external device. Further, the portable storage medium storing the program may be installed in the storage unit 35 by being mounted on a drive device (not shown).
- the storage unit 35 holds a program for causing each unit of the in-vehicle side control unit 30 to function, identification information of the mobile terminal device 200 corresponding to the in-vehicle device 100, and the like.
- the start control unit 31 detects a request signal transmission request.
- the request signal transmission request is caused by, for example, an operation of the activation switch 17.
- the start control unit 31 transmits a request signal when the main switch 11 is in an off state, that is, when the handle H is in a locked state (the vehicle cannot travel) and the start switch 17 is in an on state. Detect requests.
- the communication control unit 32 controls the in-vehicle side transmission unit 40 to transmit the request signal. More specifically, the communication control unit 32 indicates that the start switch 17 is turned on when the main switch 11 is in the off state, that is, when the handle H is in the locked state (the vehicle cannot travel). Sometimes, the in-vehicle side transmission unit 40 is caused to transmit a request signal.
- the battery B stores power necessary for transmitting the request signal in response to a request signal transmission request.
- the main switch 11 is turned on, and the kick operating unit 7 that drives the generator G that supplies power to the in-vehicle device 100 is operated.
- the system waits until necessary power is stored in the battery B.
- the determining unit 33 decodes the signal received by the in-vehicle side receiving unit 50, and determines whether the signal received by the in-vehicle side receiving unit 50 is a signal for the request signal based on the decoded result.
- a signal corresponding to the request signal is referred to as an “answer signal”.
- the in-vehicle side receiving unit 50 Device (in this case, the mobile terminal device 200) is determined to be a predetermined regular device, and it is determined that the authentication is successful.
- the determination unit 33 cannot determine that the signal received by the in-vehicle side reception unit 50 is the answer signal transmitted by the mobile terminal device 200 that is the transmission destination of the request signal, It is determined that the receiving device is not a predetermined regular device, and it is determined that the authentication has failed. For example, when a signal is transmitted from a device different from the mobile terminal device 200, the determination unit 33 determines that this device is not a regular device.
- the determination unit 33 determines the operating state of the activation switch 17 based on the signal input from the input circuit unit 62.
- the determination unit 33 determines whether or not a signal is received by the in-vehicle side reception unit 50.
- the drive control unit 34 controls the locked state of the handle H and the start limit of the engine E according to the determination result of the determination unit 33. For example, when it is determined by the determination unit 33 that the authentication is successful, the drive control unit 34, that is, the signal received by the in-vehicle side reception unit 50 is transmitted by the mobile terminal device 200 that is the transmission destination of the request signal. If the response signal is a response signal, the locked state of the steering wheel is released and the engine E start restriction is released. For example, the drive control unit 34 drives the actuator unit 18 of the handle lock unit 16 via the drive circuit unit 61 to release the lock state of the handle. The drive control unit 34 starts the engine E by driving the generator G via the starter driving unit 65.
- the mobile terminal device 200 is authenticated by the in-vehicle device 100. Identification information of the mobile terminal device 200 is stored in the storage unit 35 of the in-vehicle device 100.
- the mobile terminal device 200 includes a mobile-side receiving unit 210, a mobile-side transmitting unit 220, and a mobile-side control unit 230.
- the mobile-side receiving unit 210 receives a request signal transmitted by the in-vehicle device 100.
- the portable side transmission unit 220 transmits the answer signal generated by the portable side control unit 230 to the in-vehicle device 100 that is the reception source of the request signal.
- the mobile-side receiving unit 210 may be configured to have sensitivity characteristics (directivity) with a plurality of different directions as axes. *
- the mobile-side control unit 230 includes, for example, a signal strength measurement unit 231, a signal determination unit 232, a signal generation unit 233, and a reception control unit 234.
- the signal strength measuring unit 231 measures the signal strength of the request signal received by the mobile-side receiving unit 210.
- the signal strength measuring unit 231 may measure the signal strength detected for each of the plurality of axes for each axis. .
- the signal determination unit 232 determines the request signal received by the portable side reception unit 210 based on the measurement result by the signal strength measurement unit 231.
- the signal generation unit 233 generates an answer signal corresponding to the request signal received by the mobile-side receiver 210 and causes the mobile-side transmitter 220 to transmit the answer signal.
- the reception control unit 234 controls the request signal transmitted by the in-vehicle device 100 to be receivable based on the result received by the mobile-side receiving unit 210.
- the signal determination unit 232 uses the signal strength measurement unit 231 to measure the signals detected for each of the plurality of axes. May be arranged, and the value of the measurement result after the arrangement may be determined.
- the mobile-side receiving unit 210, the mobile-side transmitting unit 220, and the mobile-side control unit 230 may be software function units that function when a processor such as a CPU executes a program. Further, some or all of these may be hardware function units such as an LSI or an ASIC.
- the portable control unit 230 may include a storage unit (not shown), and the storage unit may be realized by a ROM, a RAM, an HDD, a flash memory, or the like.
- the program executed by the processor may be stored in the storage unit in advance or may be downloaded from an external device. Further, the portable storage medium storing the program may be installed in the storage unit by being mounted on a drive device (not shown).
- FIG. 2 is a diagram illustrating an example of the configuration of the in-vehicle side transmission unit 40.
- the vehicle-mounted side transmission part 40 is provided with the drive part 41 and the resonance part 42, for example.
- the drive unit 41 amplifies the power of the signal supplied from the in-vehicle side control unit 30 and drives the resonance unit 42.
- the resonating unit 42 includes a transmitting antenna 43 and a capacitor 44.
- the transmitting antenna 43 includes a coil and forms, for example, an LC type resonance circuit together with the capacitor 44.
- the resonance part 42 illustrated in the figure is configured as a series resonance circuit.
- the resonance frequency of the resonance unit 42 is indicated by f0.
- the transmitting antenna 43 radiates radio waves generated by the resonance of the resonance unit 42 into the atmosphere.
- the vehicle-side transmitter 40 configured as described above functions as a bandpass filter having the resonance frequency f0 as the center frequency.
- the signal supplied from the in-vehicle side control unit 30 to the in-vehicle side transmission unit 40 may be a digital signal having a predetermined frequency f near the resonance frequency f0, and the waveform is configured as a rectangular pulse signal sequence. May be.
- the resonance unit 42 attenuates components other than the desired band having the resonance frequency f0 as the center frequency, and also has the smallest attenuation rate at the resonance frequency f0 in the signal pass band, and the attenuation rate as the frequency increases from the resonance frequency f0. Has a frequency characteristic that increases.
- the frequency components in the band other than the desired band include harmonic components having the resonance frequency f0 as the fundamental frequency
- the frequency component in the band other than the desired band is the frequency of the in-vehicle transmission unit 40. It is attenuated due to characteristics.
- the in-vehicle side control unit 30 generates a signal DMOD for generating a signal of a modulation scheme such as ASK (amplitude-shift keying) or PSK (phase-shift keying), and sends the signal DMOD to the in-vehicle side transmission unit 40.
- the signal DMOD includes a pulse signal train having a frequency f.
- the communication control unit 32 controls the frequency division ratio with respect to a clock signal having a frequency sufficiently higher than the frequency f of the signal DMOD, adjusts the frequency f of the signal DMOD so as to be a desired frequency, and performs an authentication signal. Is generated.
- a method for controlling the frequency f of the signal DMOD for generating the authentication signal will be described later.
- FIG. 3 is a diagram illustrating an example of the configuration of the mobile-side receiving unit 210.
- the mobile-side receiving unit 210 includes, for example, a receiving antenna 211, a receiving circuit unit 212, a local oscillating unit 213, a mixer 214, and a demodulating unit 215.
- the reception circuit unit 212 performs amplification of the signal received by the reception antenna 211, noise removal, offset adjustment, filtering processing, and the like, and outputs the result to the mixer 214.
- the reception circuit unit 212 includes an offset measurement unit 216 and a variable gain amplification unit (hereinafter referred to as VGA) 217.
- VGA 217 amplifies the signal with a gain according to the control.
- the signal amplified by the VGA 217 may be, for example, a signal generated from a signal received by the receiving antenna 211 and a signal whose offset is measured by the offset measuring unit 216.
- the VGA 217 amplifies the signal generated from the signal received by the receiving antenna 211 with a desired gain, and adjusts the power level to be supplied to the mixer 214.
- the offset measurement unit 216 measures the offset of the signal that the VGA 217 amplifies with a desired gain.
- the mixer 214 converts the frequency of the signal output from the reception circuit unit 212 based on the signal output from the local oscillation unit 213. For example, the mixer 214 outputs a beat signal generated from the difference between the frequency of the signal output from the reception circuit unit 212 and the frequency of the signal output from the local oscillation unit 213 to the demodulation unit 215.
- the demodulator 215 demodulates the signal output from the mixer 214 with respect to the modulation scheme of the vehicle-mounted transmitter 40 described above, and outputs the demodulated signal to the portable controller 230.
- FIG. 4 is an explanatory diagram showing a frame structure of a request signal transmitted by LF communication according to the present embodiment.
- the frame structure of the request signal will be described as a pattern LFP.
- the time required for frame transmission of the pattern LFP is indicated as TLFP.
- the pattern LFP includes mobile terminal device information and authentication information.
- the mobile terminal device information includes at least training data TD, a synchronization pattern SYNC1, and identification information IDk.
- the authentication information includes first authentication information AUD1, second authentication information AUD2, and third information. Authentication information AUD3. Further, the mobile terminal device information may include data such as error correction information ECC1.
- the training data TD is arranged so as to be transmitted first when the pattern LFP is transmitted.
- the training data TD is assigned a signal pattern required for adjustment of the mobile-side receiving unit 210 when the mobile terminal device 200 receives the pattern LFP.
- the training data TD is sometimes referred to as a preamble.
- the synchronization pattern SYNC1 is arranged to be transmitted next to the training data TD, for example.
- the synchronization pattern SYNC1 includes a signal pattern used as an index for extracting various types of information after the mobile-side receiving unit 210 finishes training with the training data TD, and information for identifying the pattern type.
- the identification information IDk is identification information that identifies the mobile terminal device corresponding to the transmission destination (destination) of the pattern LFP.
- the error correction information ECC1 is information for performing error detection and error correction of each data such as the received identification information IDk in the pattern LFP.
- the error correction information ECC1 can appropriately determine an error detection and error correction target range, an error detection and error correction method, and the like for each pattern type.
- the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 included in the pattern LFP indicate, for example, information (encryption key, ciphertext, etc.) required for the authentication process. .
- a general algorithm can be applied to the authentication processing method.
- the information encrypted in the in-vehicle device 100 is decrypted by the mobile terminal device 200, and the decrypted information is determined by either the mobile terminal device 200 or the in-vehicle device 100.
- Good In the following embodiment, a case where information necessary for authentication processing is added to the amplitude of the signal of each part of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 is illustrated. To do.
- FIG. 5 is a flowchart illustrating an example of a process flow of the in-vehicle side control unit 30. The processing in this flowchart is performed when the main switch 11 is in an off state, that is, when the handle H is in a locked state (a state where the vehicle cannot travel).
- the determination unit 33 determines the operating state of the activation switch 17 based on the signal input from the input circuit unit 62 (step S100).
- the vehicle-mounted side control unit 30 ends the process of this flowchart.
- the communication control unit 32 refers to the transmission pattern information table (FIG. 6) and sets the transmission pattern of the request signal (step S102).
- the information that defines the transmission pattern includes information such as the frequency at which authentication information is transmitted and the time at which authentication information is transmitted.
- the frequency f for transmitting the authentication information the frequency f1 for transmitting the first authentication information AUD1, the frequency f2 for transmitting the second authentication information AUD2, and the third authentication information
- the frequency f3 for sending AUD3 is defined.
- the communication control unit 32 sets the frequency f1, the frequency f2, and the frequency f3 based on the frequency characteristics (hereinafter referred to as “resonance characteristics”) with respect to the gain (signal strength) of the transmitting antenna 45 described above. .
- the frequency f1 is set to a value closer to the resonance frequency f0 of the transmitting antenna 45 than the frequency f2.
- the frequency f3 is set to a value farther than the frequency f2 with respect to the resonance frequency f0 of the transmission antenna 45 described above.
- the transmission power transmitted as radio waves of the respective frequencies The frequency f1 is the highest, followed by the frequency f2 and the frequency f3 in that order.
- the communication control unit 32 can easily change the signal strength of the request signal by adjusting the frequency at the time of sending each piece of authentication information, and the radio wave when the first authentication information AUD1 is sent.
- the request signal is transmitted by making the signal strength different from the signal strength of the radio wave when the second authentication information AUD2 is sent and the signal strength of the radio wave when the third authentication information AUD3 is sent. can do.
- the communication control unit 32 transmits a request signal (Step S104). For example, the communication control unit 32 transmits the request signal request signal according to any of a plurality of predetermined transmission patterns.
- the communication control unit 32 sets a time TAUD1 for sending the first authentication information AUD1, a time TAUD2 for sending the second authentication information AUD2, and a time TAUD3 for sending the third authentication information AUD3.
- a prescribed transmission pattern is determined in advance and stored in the storage unit 35.
- FIG. 6 is a diagram illustrating an example of a transmission pattern information table that stores transmission patterns.
- the transmission pattern information table transmits a time TAUD1 for sending the first authentication information AUD1, a time TAUD2 for sending the second authentication information AUD2, and a time TAUD3 for sending the third authentication information AUD3.
- the communication control unit 32 when the transmission control unit 32 selects a transmission pattern from the transmission pattern information table, the communication control unit 32 randomly determines the transmission pattern using a random number or the like. At this time, the values of the time TAUD1, the time TAUD2, and the time TAUD3 may be the same or different. Accordingly, the communication control unit 32 can improve the confidentiality of information regarding the time TAUD1, the time TAUD2, and the time TAUD3.
- the communication control unit 32 stores information on the determined time TAUD1, time TAUD2, and time TAUD3 in the storage unit 35.
- the communication control unit 32 stores the information last time.
- the information of the time TAUD1, time TAUD2, and time TAUD3 set this time is overwritten on the information. That is, the communication control unit 32 updates the information on the time TAUD1, the time TAUD2, and the time TAUD3 in the storage unit 35 every time the time TAUD1, the time TAUD2, and the time TAUD3 are set.
- the communication control unit 32 transmits a request signal having a frame structure as shown in FIG. 4 to the mobile terminal device 200, for example.
- the communication control unit 32 sets the frequency of the signal to be output to a predetermined frequency, and causes the in-vehicle side transmission unit 40 to transmit the mobile terminal device information.
- the communication control unit 32 sets the frequency of the signal to be output to the frequency f1, and causes the in-vehicle side transmission unit 40 to transmit the first authentication information AUD1 over the time TAUD1.
- the communication control unit 32 sets the frequency of the signal to be output to the frequency f2, and causes the in-vehicle side transmission unit 40 to transmit the second authentication information AUD2 over time TAUD2.
- the communication control unit 32 sets the frequency of the signal to be output to the frequency f3, and causes the in-vehicle side transmission unit 40 to transmit the third authentication information AUD3 over the time TAUD3.
- the communication control unit 32 transmits a request signal to the mobile terminal device 200 based on the transmission frequency (frequency f1, f2, f3) and the transmission time (time TAUD1, TAUD2, TAUD3) set in this way.
- the determination unit 33 determines whether or not the answer signal is received by the in-vehicle side reception unit 50 (step S108).
- the in-vehicle side control unit 30 stands by until the answer signal is received.
- the determination unit 33 is information included in the answer signal received by the in-vehicle side receiving unit 50, and shows the result of receiving the authentication information. From the information shown, it is determined whether or not the number of differential signal detections (difference signal detection count) is zero (step S110).
- the difference signal in the above case is the second authentication information AUD2 or the third authentication information AUD3 with respect to the first authentication information AUD1, and the received signal strength (signal) of the first authentication information AUD1
- This is a signal excluding signals whose received signal strength (signal strength value) is less than or equal to a predetermined amount compared to the intensity value) and which are treated as invalid signals whose received signal strength (signal strength value) is small. is there.
- the determination unit 33 determines whether or not the determination condition is satisfied based on the information of the signal received by the in-vehicle side reception unit 50 (step S112).
- the determination condition is, for example, whether or not the mobile terminal device 200 that is the communication partner of the in-vehicle side receiving unit 50 is a legitimate device, and from the answer signal received from the mobile terminal device 200, the mobile terminal device 200. Is a condition used as a criterion for determining whether or not the received signal is a regular request signal. For example, when the determination condition is satisfied, the determination unit 33 determines that the signal received by the mobile terminal device 200 is a normal request signal and that the mobile terminal device 200 that has sent the answer signal is a normal device.
- the mobile terminal device 200 determines that the mobile terminal device 200 has been successfully authenticated.
- the determination condition “when the number of detected invalid signals is zero” or “the number of times determined with respect to the time at which the first authentication information AUD1 was sent, and the first authentication” The case where the number of times that the received signal strength of the usage information AUD1 is determined to be equal to the received signal strength coincides.
- the determination unit 33 determines that the signal received by the in-vehicle side reception unit 50 is the answer signal transmitted by the mobile terminal device 200 that is the transmission destination of the request signal when the above determination condition is satisfied. In conjunction with this determination, whether the portable device ID information included in the answer signal matches, whether the RSSI strength (reception strength of the first authentication information AUD1) is equal to or greater than a predetermined threshold, and encryption by decrypting the encryption data When the respective statuses such as whether the data for use match can be detected, the determination unit 33 determines that the mobile terminal device 200 that is the communication counterpart of the in-vehicle side reception unit 50 is a legitimate device and succeeds in the authentication. It is determined that it has been performed (step S114).
- the determination unit 33 determines whether the authentication has failed. If the determination unit 33 has a difference signal detection count (difference signal detection count) of 1 or more, or if the determination condition is not satisfied, the signal received by the in-vehicle side reception unit 50 is: It is determined that the answer signal is not transmitted by the mobile terminal device 200 that is the transmission destination of the request signal. The determination unit 33 determines that the device that is the communication partner of the in-vehicle side reception unit 50 is not a regular device, and determines that the authentication has failed.
- difference signal detection count difference signal detection count
- step S116 it is determined that the device that is the communication partner of the in-vehicle side receiving unit 50 is not a regular device.
- step S114 the vehicle-mounted side control unit 30 (drive control unit 34) controls the drive unit (solenoid) of each unit to be driven to unlock the locked state of each unit (step S118). Thereby, the processing of this flowchart is completed.
- FIG. 7 is a flowchart illustrating an example of a process flow of the mobile-side control unit 230.
- the mobile-side control unit 230 performs a request signal reception process.
- the request signal reception process the reception sensitivity characteristic of the mobile-side receiving unit 210 of the mobile terminal device 200 is optimized.
- the mobile-side control unit 230 determines whether or not the mobile-side reception unit 210 has started receiving a request signal (step S205). If reception of the request signal is not started by the mobile-side receiving unit 210, the process of this flowchart is terminated.
- the signal determination unit 232 determines whether reception of the first authentication information AUD1 is started in the frame structure (pattern LFP) of the request signal when reception of the request signal is started by the mobile-side receiving unit 210. That is, it is determined whether or not the period of the mobile terminal device information (LF data) has ended in the frame structure of the request signal (step S210).
- the signal determination unit 232 starts counting the time when the reception of the request signal is started, that is, in the frame structure of the request signal, in response to the start of the information for the mobile terminal device. It is determined that the period of the mobile terminal device information (LF data) has ended due to the expiration of the period.
- the signal determination unit 232 waits until the LF data period of the request signal expires. On the other hand, after the LF data period of the request signal expires, the portable control unit 230 performs signal measurement processing. Details of the signal measurement process will be described later (step S220).
- the signal generation unit 233 generates an answer signal having a predetermined frame structure and causes the portable-side transmission unit 220 to transmit it (step S230). Thereby, the process of this flowchart is complete
- FIG. 8 is a diagram for explaining the signal measurement process of the portable control unit 230 in step S220.
- the figure shows a request signal received by the mobile terminal device 200 that is the target of the signal measurement process.
- a description will be given of processing performed in a period from time t0 to time t7 when the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 are observed in the request signal.
- the mobile-side control unit 230 performs a plurality of measurements during a period from time t0 to time t7. For example, in the following description, as shown in the figure, a case where measurement is performed in six steps from M1 to M6 will be described as an example.
- the measurement is performed at each time from time t1 to time t6 measured with reference to time t0. From the time t1 to the time t6, the time from the time t0 to the time t1 is defined as the time T1, and the time after the time t1 is defined as the period T2.
- Fig. 8 (a) shows a schematic signal waveform.
- the amplitudes of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 are observed at W1, W2, and W3.
- the relationship is W1> W2> W3.
- Fig. 8 (b) shows the detected value of the amplitude detected in each measurement.
- the detected value of the measurement time M1 at time t1 and the measurement time M2 at time t2 is W1.
- the detected value of the measurement time M3 at time t3 and the measurement time M4 at time t4 is W2.
- the detected value of the measurement time M5 at time t5 and the measurement time M6 at time t6 is W3.
- the first threshold value TH1 and the second threshold value TH2 are determined so that the relationship represented by the following formula (1) is established.
- TH1 (W1-d1)
- TH2 (W1-d2) W3 ⁇ TH2 ⁇ W2 ⁇ TH1 ⁇ W1 (1)
- d1 and d2 are predetermined as constants, and for example, the values are stored in the storage unit of the mobile terminal device 200 not shown.
- d1 is referred to as a differential threshold (first threshold) that can identify a signal (second signal) having a detection value W2 having a smaller amplitude than the signal (first signal) having a detection value W1
- d2 is referred to as a difference threshold (first threshold).
- the signal of the detection value W3 (third signal) having an amplitude smaller than the detection value W2 is referred to as an identifiable invalid threshold (second threshold).
- FIG. 9 is a flowchart showing an example of the flow of signal measurement processing.
- the portable-side control unit 230 counts the number of measurements using a measurement number counter that takes a value from 0 to 6.
- the portable-side control unit 230 counts the number of measurement times when the measured value is detected as (TH1 ⁇ W1) using a normal signal detection number counter that takes values from 1 to N1.
- the portable side control unit 230 counts the number of measurement times when the measured value is detected as (TH2 ⁇ W2 ⁇ TH1) using a differential signal detection number counter that takes values from 0 to N2.
- the portable-side control unit 230 counts the number of measurement times when the measured value is detected as (W3 ⁇ TH2) using an invalid signal detection number counter that takes values from 0 to N3.
- the “normal signal detection number counter”, “difference signal detection number counter”, and “invalid signal detection number counter” are defined as variables. For example, these values are stored in the storage unit of the mobile terminal device 200 (not shown). Stored in the area. For example, each of “measurement number counter”, “normal signal detection number counter”, “difference signal detection number counter”, and “invalid signal detection number counter” is set to 0, 1, 0, and 0 by initialization processing. Is done.
- the mobile-side controller 230 determines whether or not the current measurement is the first time based on the value of the measurement counter. For example, the portable control unit 230 determines whether or not the value of the measurement number counter is 1 (step S402).
- the reception control unit 234 uses the offset measurement unit 216 to execute the request signal frame before performing the first measurement described later.
- the offset of the signal corresponding to the first authentication information AUD1 is measured. If the measured offset value is not within the predetermined range, the reception control unit 234 controls the offset measuring unit 216 so that the offset value falls within the predetermined desired range. Adjust. The reception control unit 234 finishes the adjustment when the measured offset value measured again falls within a predetermined range, and fixes the adjusted value until the following series of processing is finished after the adjustment is finished. .
- the reception control unit 234 stores the adjusted offset measurement value data in a storage unit (not shown) (step S404).
- the reception control unit 234 determines a measurement range suitable for receiving each piece of authentication information in order to adjust the reception sensitivity characteristic of the mobile-side reception unit 210.
- the portable receiver 210 has a VGA 217, and the amplification factor of the portable receiver 210 can be set to a desired amplification factor by adjusting the amplification factor of the VGA 217.
- the reception control unit 234 controls the VGA 217 to function as an AGC (Automatic Gain Control), and obtains an amplification factor that optimizes the output signal level of the VGA 217 by the function of the AGC. Note that the amplification factor obtained as a result of the optimization takes a quantized discrete value.
- the amplification factors are set to values of 54 dB (decibel), 36 dB, 18 dB, 0 dB, ⁇ 18 dB, etc. in order from the largest amplification factor.
- the reception control unit 234 measures the signal level of the output signal of the VGA 217 while adjusting the amplification factor of the VGA 217 to the above value, and optimizes the amplification factor of the VGA 217 so that the measured signal level is within a desired range. To do.
- the VGA 217 may be divided into a plurality of stages, or may be switched corresponding to a plurality of systems.
- the reception control unit 234 adjusts the amplification factor of the VGA 217 so that the amplification factor is suitable for the optimized measurement range.
- the measurement range of the portable receiver 210 is set (step S406).
- the signal strength measurement unit 231 obtains a received signal strength value (RSSI 1 ) by measuring the received signal strength of the signal corresponding to the first authentication information AUD1 as the strength value of the authentication signal.
- RSSI 1 is used as a reference value for the determination process of the measurement time in the subsequent measurement times (step S408).
- RSSI 1 corresponds to the measured value W1 at M1 in FIG.
- the reception control unit 234 adds 1 to the value of the normal signal detection number counter, updates the value after the addition, writes the updated value in the normal signal detection number counter (step S410), and performs step S424. Proceed to processing.
- the signal strength measurement unit 231 uses the received signal strength of the signal corresponding to the authentication information AUD corresponding to the measurement time as the strength value of the authentication signal. Is measured to obtain a received signal strength value (RSSI N ) (step S412).
- the signal determination unit 232 determines whether or not the detected signal should be determined as an invalid signal based on the invalid threshold d2 determined from RSSI 1 acquired in step S412 (step S414).
- step S414 If it is determined in step S414 that the detected signal is an invalid signal, the reception control unit 234 adds 1 to the counter value of the invalid signal detection count, and updates the value after the addition, The updated value is written in the invalid signal detection number counter (step S416), and the process proceeds to step S424.
- the reception control unit 234 acquires the RSSI 1 acquired in step S408 of the first measurement time obtained by the signal determination unit 232.
- the difference between the RSSI N obtained in step S412 of the current measurement count and determines whether or difference threshold value For example, the reception control unit 234 determines whether or not the detected signal should be determined as a differential signal based on the difference threshold d1 determined from RSSI 1 acquired in step S412 (step S418).
- step S4108 the difference between the RSSI 1 and RSSI N is, when it is determined to be equal to or greater than the difference threshold, the reception control unit 234 adds 1 to the value of the differential signal detection number counter, the The value after the addition is updated, the updated value is written in the difference signal detection number counter (step S420), and the process proceeds to step S424.
- step S4108 the difference between the RSSI 1 and RSSI N is, when it is determined not more than the difference threshold, the reception control unit 234 adds 1 to the normal signal detection times, after the addition The value is updated, and the updated value is written in the normal signal detection number counter (step S422), and the process proceeds to step S424.
- step S416, step S420, or step S422 the reception control unit 234 adds 1 to the number of measurements, updates the value after the addition, and after the update Is written in the measurement counter (step S424).
- the reception control unit 234 determines based on the value of the measurement number counter whether or not the specified number of measurements have been completed (step S426).
- step S426 If it is determined in step S426 that the specified number of measurements have been completed, the measurement for the request signal is terminated (step S428). Thereby, the process of this flowchart is complete
- step S426 determines whether the specified number of measurements has been completed. If it is determined in step S426 that the specified number of measurements has not been completed, the measurement for the request signal is continued (step S430). Thereby, the process of this flowchart is complete
- FIG. 2 is a timing chart showing an example of the processing flow of the mobile terminal device authentication system 1.
- the in-vehicle control unit 30 is instructed to start the control unit (“control unit start: ON”). In response to this instruction, the in-vehicle control unit 30 performs initialization processing and ends by time t15.
- the initialization process includes a process for setting an input / output port corresponding to a peripheral part of the in-vehicle side control unit 30 and a process for adjusting an initial state of the in-vehicle side receiving unit 50.
- the in-vehicle side control unit 30 detects that the main switch 11 is in an OFF state based on the result of acquiring the conduction state of the main switch 11 by the main switch state acquisition unit 63, and the determination result of the main switch The state where the (main switch judgment value) is turned off is continued.
- the in-vehicle side control unit 30 sequentially transmits LF signals for “smart authentication communication” corresponding to the mobile device registered in the in-vehicle side control unit 30 as follows.
- the in-vehicle device 100 starts transmitting a request signal and ends the transmission at time t22.
- the mobile terminal device 200 requests, for example, a request including a set of signals of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3. Send a signal.
- the mobile terminal device 200 receives the request signal. By this reception, the mobile terminal device 200 adjusts the reception sensitivity characteristic according to the signal strength of the signal extracted from the received request signal.
- the mobile terminal device 200 receives a request signal including signals of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3, for example. Send.
- the mobile terminal device 200 receives the request signal and performs an authentication process based on the request signal.
- an authentication process is performed using difference information of signal strength values of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3.
- the mobile terminal device 200 stores information on the number of times shown in the transmission pattern information table shown in FIG. 6 above, and when detecting the number of times corresponding to the pattern, a request (request) from the in-vehicle device 100 is stored.
- the mobile terminal device 200 transmits an answer signal (RFA) from the mobile terminal device 200 after time t22. Start.
- the in-vehicle device 100 receives the answer signal (RFA) transmitted by the in-vehicle side receiving unit 50.
- the in-vehicle device 100 performs authentication (RF data determination) of the mobile terminal device 200 based on the received answer signal (RFA). For example, the authentication of the mobile terminal device 200 may determine whether or not the received answer signal (RFA) matches that specified as a regular answer signal.
- the in-vehicle device 100 causes the in-vehicle side control unit 30 (drive control unit 34) to drive the solenoid of each unit to unlock the locked state of each unit. Control. The locking state of each part is unlocked after time t25.
- FIG. 11 is an explanatory diagram showing a frame structure of an answer signal transmitted by RF communication according to the present embodiment.
- the frame structure of the answer signal will be described as a pattern RFA.
- the pattern RFA indicates in-vehicle device information, information indicating the number of receptions NAUD1 # of the first authentication information AUD1, and the number of receptions NAUD2 # of the second authentication information AUD2.
- Information information indicating the number of receptions NAUD3 # of the third authentication information AUD3, error correction information ECC2, and the like.
- the in-vehicle device information includes at least training data TD, a synchronization signal SYNC2, and identification information. Further, the in-vehicle device information may include data such as error correction information ECC2. It is assumed that time TRFA is required for sending an answer signal having the frame structure of pattern RFA.
- the training data TD is arranged to be transmitted first when the pattern RFA is transmitted.
- a signal pattern required for adjustment of the in-vehicle side receiving unit 50 when the in-vehicle device 100 receives the pattern RFA is assigned to the training data TD.
- the synchronization signal SYNC2 is arranged to be transmitted next to the training data TD, for example.
- the synchronization signal SYNC2 includes a signal pattern used as an index when extracting various types of information after the in-vehicle side receiving unit 50 finishes training with the training data TD, and information for identifying the pattern type.
- the error correction information ECC2 is information for performing error detection and error correction of each data such as information indicating the received number of times of reception NAUD1 # in the pattern RFA.
- the error correction information ECC2 can appropriately determine an error detection and error correction target range, an error detection and error correction method, and the like for each type of pattern.
- the information indicating the number of receptions NAUD1 # of the first authentication information AUD1, the information indicating the number of receptions NAUD2 # of the second authentication information AUD2, and the number of receptions NAUD3 # of the third authentication information AUD3 are shown.
- Information such as information may be assigned to a part of the pattern RFA in association with other information.
- information indicating the number of receptions NAUD1 # of the first authentication information AUD1 may be associated with the received signal strength of the first authentication information AUD1.
- the information indicating the number of receptions NAUD1 # of the first authentication information AUD1 and the information indicating the received signal strength of the first authentication information AUD1 are multiplied by a predetermined coefficient to be linearly added. Can be one piece of information.
- the first authentication information AUD1 is the first authentication information AUD1
- the second authentication information AUD2 is the same.
- the third authentication information AUD3 is the same.
- the determination unit 33 of the in-vehicle device 100 receives the number of receptions NAUD1 # of the first authentication information AUD1 and the number of receptions of the second authentication information AUD2 from an answer signal having a frame structure (RFA) as shown in FIG.
- the NAUD2 # and the number of times of receiving the third authentication information AUD3 NAUD3 # are acquired.
- the determination unit 33 includes, for example, the number of times determined as a “normal” signal (first signal) and the number of times determined as a “difference signal (second signal)” based on the difference threshold (first threshold). Based on the information, it is determined from the answer signal received by the in-vehicle side receiving unit 50 whether or not the signal received by the mobile terminal device 200 is a regular request signal.
- the signal is received by the in-vehicle side receiving unit 50. It can be determined that the received signal is a normal answer signal.
- FIG. 12 and 13 are diagrams showing the effects of the mobile terminal device authentication system 1.
- FIG. The graphs shown in FIG. 12 and FIG. 13 show the measurement results of the signal strength of the set of signals detected in the mobile terminal device 200 by changing the distance between the in-vehicle device 100 and the mobile terminal device 200.
- FIG. 12 shows an example in which the reception sensitivity characteristic of the mobile terminal device 200 is determined so that the in-vehicle device 100 can be unlocked from the mobile terminal device 200 located relatively far away.
- the graphs indicated by W1 to W3 indicate the reception strengths of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3, respectively.
- FIG. 13 shows a measurement result when the reception sensitivity characteristic of the mobile terminal device 200 is adjusted with respect to the measurement conditions of FIG.
- the reception sensitivity of the mobile terminal device 200 is reduced from the measurement condition in the case of FIG.
- the result shown in FIG. 12 shows that the signals can be separated and received in the range of about 40 (cm) or less where W1 to W3 were not separated.
- the first authentication information used as the authentication signal is adjusted by adjusting the reception sensitivity characteristic of the mobile terminal device 200 based on the intensity of the actually received signal.
- AUD1, second authentication information AUD2 and third authentication information AUD3 can be received as signals having different signal strengths.
- the in-vehicle side control unit 30 causes the in-vehicle side transmission unit 40 to transmit a signal including a plurality of authentication signals set so that the received signal strength (RSSI) is different as the request signal
- the portable side receiving unit 210 receives the signal transmitted by the in-vehicle side transmitting unit 40 as a request signal
- the portable side control unit 230 is based on the strength value of the authentication signal received by the portable side receiving unit 210.
- the reception sensitivity characteristic of the reception unit 210 is instructed, and a plurality of authentication signals received after the reception sensitivity characteristic of the mobile-side reception unit 210 is adjusted to the instructed reception sensitivity characteristic are determined.
- the answer signal including the determination result is transmitted to the mobile-side transmission unit 220, and the in-vehicle side control unit 30 determines the determination results of the plurality of authentication signals included in the signal received by the in-vehicle side reception unit 50. Based on the answer signal received by the in-vehicle side receiving unit 50, it is possible to improve the security of authentication by determining whether the signal received by the mobile terminal device is a legitimate request signal. .
- the mobile-side receiving unit 210 includes a plurality of antennas (not shown), and detects signals from the respective antennas separately. Each antenna is assigned to an individual system (channel). Each of the plurality of antennas has directivity characteristics with independent reception sensitivity. For example, the directivity axis of each antenna is determined so that the sensitivity increases in different directions. For example, the directivity axes of the three antennas are determined to be orthogonal to each other, and the antennas are supported so that the axes of the antennas are fixed to the main body of the mobile terminal device 200. The above three antennas are allocated to three channels (ch1, ch2, ch3).
- the mobile-side receiving unit 210 detects a signal from each antenna separately for each channel, and can individually determine the received signal strength of each channel.
- the mobile side control unit 230 instructs the reception sensitivity characteristic of the mobile side reception unit 210 based on the strength value of the authentication signal received by the mobile side reception unit 210 separately for each channel.
- the portable control unit 230 determines a plurality of authentication signals received after the reception sensitivity characteristic of the portable reception unit 210 is adjusted to the instructed reception sensitivity characteristic.
- the mobile terminal device 200 of the first modified example receives a received signal by a plurality of systems, but the mobile terminal device 200 of the second modified example receives a received signal by a plurality of systems. This simplifies the configuration. Hereinafter, this point will be mainly described.
- the reception control unit 234 can select any one of the plurality of measurement ranges. For example, in the following description, it is assumed that there are two selectable measurement ranges.
- the two measurement ranges are a first measurement range suitable for authentication of the mobile terminal device 200 arranged at a relatively long distance and a second measurement range suitable for authentication of the mobile terminal device 200 arranged at a relatively short distance. It is.
- the first measurement range and the second measurement range are different in the range of received power of radio waves received by the mobile terminal device 200.
- the reception control unit 234 selects one of the plurality of measurement ranges as a measurement range common to each channel, and causes the reception sensitivity characteristic of the mobile-side reception unit 210 to correspond to the selected measurement range.
- FIG. 14 is a flowchart illustrating a procedure of measurement range setting processing of the mobile terminal device 200 according to the modification.
- the measurement range setting process corresponds to step S406 in FIG.
- the reception control unit 234 receives the signal component in each axial direction detected by the antenna of each channel. For example, the reception control unit 234 acquires the value of the amplification factor of the VGA 217 for each of the three channels (ch1, ch2, ch3) as the optimum range information of each channel (step S4061).
- the reception control unit 234 calculates an average value of the three acquired values, and determines whether the calculated average value is greater than a predetermined threshold value, whether the first measurement range is set, 2 Select whether to set the measurement range.
- the reception control unit 234 calculates the average value of 18 dB, 18 dB, and 18 dB when the values of the amplification factors of the VGA 217 of the three channels are 18 dB. The result is in the second measurement range.
- the reception control unit 234 calculates the average value thereof as 30 dB, and the determination result is the second. Set to the measurement range.
- the reception control unit 234 calculates the average value of 36 dB, 36 dB, and 18 dB when the gain values of the respective VGAs 217 are 36 dB, 36 dB, and 18 dB. Set to the measurement range.
- the reception control unit 234 calculates the amplification factor that can be commonly used for each of the three channels from the amplification factor value of the VGA 217 corresponding to the three channels.
- the reception control unit 234 sets the VGA 217 based on the selected optimum range information (step S4062).
- the number of optimal range candidates is two is illustrated, but the number of optimal range candidates may be three or more.
- the configuration of the amplifying unit can be simplified by sharing the amplifying unit (for example, VGA 217) for receiving the received signal with a plurality of systems in each channel.
- the portable side control unit 230 is instructed by instructing the reception sensitivity characteristic of the portable side reception unit 210 based on the strength value of the authentication signal received by the portable side reception unit 210.
- a plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver 210 is adjusted to the reception sensitivity characteristic are discriminated.
- the mobile-side control unit 230 causes the mobile-side transmission unit 220 to transmit an answer signal including the determination results of a plurality of authentication signals.
- the in-vehicle side control unit 30 determines whether the portable terminal device is based on the answer signal received by the in-vehicle side reception unit 50 based on the determination results of the plurality of authentication signals included in the signal received by the in-vehicle side reception unit 50.
- the mobile terminal device authentication system 1 can improve the security of authentication.
- the result of the determination whether the signal received by the mobile terminal device 200 is a regular request signal is the result of the determination whether the mobile-side receiving unit 210 is a communication that has received the regular request signal. Also good.
- the mobile side control unit 230 of the mobile terminal device authentication system 1 performs a plurality of authentications based on the reception sensitivity characteristics of the mobile side reception unit 210 adjusted based on the intensity value of the authentication signal received by the mobile side reception unit 210.
- the authentication signal may be received, a plurality of authentication signals may be determined based on the intensity value, and the answer signal may be transmitted to the mobile-side transmitting unit 220.
- the in-vehicle side control unit 30 compares the transmission time of the authentication signal with the determination result of the authentication signal, and based on the comparison result, the signal received by the mobile terminal device 200 is a normal request signal. You may make it determine whether it exists.
- the authentication signal includes a first signal and a second signal whose signal strength is smaller than that of the first signal.
- the vehicle-mounted side control unit 30 receives the answer received by the vehicle-mounted side receiving unit 50 based on information including the number of times determined as the first signal and the number of times determined as the second signal based on the first threshold. The signal may be determined.
- the authentication signal includes a first signal and a second signal whose signal strength is smaller than that of the first signal.
- the portable-side control unit 230 identifies a first threshold that can identify the first signal and the second signal, and a third signal that has a smaller signal strength than the second signal. Information based on two threshold values and including the number of times determined as the first signal, the number of times determined as the second signal, and the number of times determined as the third signal. Information indicating the discrimination result of the signal.
- the portable side control unit 230 causes the portable side transmission unit to transmit the answer signal, and the in-vehicle side control unit determines the number of times determined as the first signal, the number of times determined as the second signal, and the third number.
- the answer signal received by the in-vehicle side receiving unit may be determined based on information including the number of times of the determination and the number of times determined.
- the in-vehicle side control unit determines that the signal received by the in-vehicle side reception unit corresponds to the reception sensitivity characteristic of the portable side reception unit when the number of times determined as the second signal is not (the number of times is 0).
- the signal received by the in-vehicle side receiving unit is the portable side receiving unit when it is determined that the signal is not in an appropriate state and there is a time when the second signal is determined (the number of times is 1 or more). It may be determined that the reception sensitivity characteristic is in an appropriate state.
- the mobile terminal device authentication system determines that the signal is the second signal, so that the signal received by the in-vehicle side receiving unit is in an appropriate state with respect to the reception sensitivity characteristic of the mobile side receiving unit. And the determination accuracy at the time of authentication can be further improved.
- the in-vehicle side control unit is a request signal transmitted by the in-vehicle side transmission unit based on a determination result of the plurality of authentication signals included in the answer signal. It may be determined whether or not.
- the vehicle-mounted side control unit is the answer signal transmitted by the mobile-side transmitting unit based on the determination result of the plurality of authentication signals included in the answer signal. It may be determined whether or not.
- the in-vehicle side control unit may cause the in-vehicle side transmission unit to transmit the authentication signal having a transmission time irregularly determined from a predetermined pattern.
- the signal strength of the request signal is easily changed by setting the frequency at the time of transmission of a plurality of pieces of authentication information based on the resonance characteristics of the transmission antenna 45. be able to.
- the in-vehicle side control unit 30 (communication control unit 32) causes the in-vehicle side transmission unit 40 to transmit a request signal with an irregularly determined transmission time.
- the mobile terminal device authentication system 1 in the above-described embodiment may be applied to an automobile having a vehicle door such as a passenger car, for example.
- the mobile terminal device 200 is authenticated by the in-vehicle device 100, the locking of the vehicle door may be unlocked.
- the mobile terminal device authentication system 1 in the above-described embodiment determines whether the signal received by the mobile terminal device 200 is a legitimate request signal, based on the mobile terminal device 200 side, that is, the mobile side control unit 230. May be implemented.
- the mobile-side control unit 230 can obtain the determination result on the mobile terminal device 200 side by performing the determination process described above as the process of the in-vehicle side control unit 30.
- the mobile-side control unit 230 includes the result of the above determination in the answer signal, transmits it to the in-vehicle device 100, displays it on the display unit included in the mobile terminal device 200, or displays the in-vehicle device 100. Control may be made so that an external device other than the above is notified and output.
- the signal strength (output) at the time of transmission (transmission) of the authentication information included in the request signal varies depending on the resonance characteristic of the resonance unit 42 and the difference in frequency.
- the present invention is not limited to this.
- the signal strength (or gain) for each piece of authentication information may be made different by a filter circuit or the like in which the resonance characteristics of the resonance unit 42 are simulated.
- the filter circuit may be realized by an analog circuit, a digital circuit, or a combination of these circuits.
- the in-vehicle control unit 30 generates a periodic signal in which a sine wave or a harmonic component is suppressed. And you may supply to the drive part 41.
- DESCRIPTION OF SYMBOLS 1 ... Portable terminal device authentication system, 6 ... Kick pedal, 7 ... Kick operation part, 8 ... Conversion part, 16 ... Handle lock part, 17 ... Start switch, 18 ... Actuator part, 100 ... In-vehicle apparatus, 20 ... Power supply part, DESCRIPTION OF SYMBOLS 30 ... Car-mounted side control part, 31 ... Start-up control part, 32 ... Communication control part, 33 ... Determination part, 34 ... Drive control part, 35 ... Memory
- Main switch state acquisition part 64 ... Main relay drive part, 65 ... Starter drive part, 200 ... Portable terminal device, 210 ... Portable side receiver, 220 ... Portable side transmission , 230... Portable side control unit, 231... Signal strength measurement unit, 232... Signal determination unit, 233... Signal generation unit, 234 .. reception control unit, V .. scooter, E. Teri, H ... handle
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Abstract
The on-board device of this portable terminal authentication system transmits a signal to a vehicle-side transmission unit, said signal including preset multiple authentication signals having different reception signal strengths. The portable terminal device instructs a portable-terminal-side reception unit to use a reception sensitivity characteristic determined on the basis of the strength values of the received authentication signals, and discriminates between the received multiple authentication signals after the reception sensitivity characteristic of the portable-terminal-side reception unit is adjusted to match the instructed reception sensitivity characteristic. A vehicle-side control unit or a portable-terminal-side control unit determines, on the basis of the discrimination result of the multiple authentication signals, whether or not the portable-terminal-side reception unit received a legitimate request signal during the communication.
Description
本発明は、携帯端末装置認証システム、車載装置、および携帯端末装置に関する。
本願は、2015年9月18日に出願された日本国特願2015-185677号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a mobile terminal device authentication system, an in-vehicle device, and a mobile terminal device.
This application claims priority based on Japanese Patent Application No. 2015-185677 filed on Sep. 18, 2015, the contents of which are incorporated herein by reference.
本願は、2015年9月18日に出願された日本国特願2015-185677号に基づき優先権を主張し、その内容をここに援用する。 The present invention relates to a mobile terminal device authentication system, an in-vehicle device, and a mobile terminal device.
This application claims priority based on Japanese Patent Application No. 2015-185677 filed on Sep. 18, 2015, the contents of which are incorporated herein by reference.
従来、車載装置と、ユーザが携帯する携帯端末装置との間で双方向通信を行って端末装置の認証を行い、車両のドアの施解錠や、エンジンの始動等を実施する双方向通信認証技術が知られている。
Conventionally, two-way communication authentication technology that performs two-way communication between an in-vehicle device and a portable terminal device carried by a user to authenticate the terminal device, and locks and unlocks a door of a vehicle, starts an engine, etc. It has been known.
車載装置と携帯端末装置との間の距離により受信信号強度が変化する。携帯端末装置が車載装置の近くに配置された場合に、携帯端末装置の受信信号が飽和することがある。
これに関連し、携帯端末装置が車載装置から認証処理の対象にする信号を受信して、その信号の所定の部分の受信強度が飽和していることを検出した場合、受信強度が飽和していることを車載装置に通知して、車載装置がその通知に応じて、少なくとも所定の部分の送信強度を下げて再送する通信システムが知られている(例えば、特許文献1参照)。 The received signal strength varies depending on the distance between the in-vehicle device and the mobile terminal device. When the mobile terminal device is arranged near the in-vehicle device, the received signal of the mobile terminal device may be saturated.
In this regard, when the mobile terminal device receives a signal to be subjected to authentication processing from the in-vehicle device and detects that the reception intensity of a predetermined portion of the signal is saturated, the reception intensity is saturated. There is known a communication system in which an in-vehicle device is notified and the in-vehicle device retransmits at least a predetermined portion of the transmission intensity in response to the notification (see, for example, Patent Document 1).
これに関連し、携帯端末装置が車載装置から認証処理の対象にする信号を受信して、その信号の所定の部分の受信強度が飽和していることを検出した場合、受信強度が飽和していることを車載装置に通知して、車載装置がその通知に応じて、少なくとも所定の部分の送信強度を下げて再送する通信システムが知られている(例えば、特許文献1参照)。 The received signal strength varies depending on the distance between the in-vehicle device and the mobile terminal device. When the mobile terminal device is arranged near the in-vehicle device, the received signal of the mobile terminal device may be saturated.
In this regard, when the mobile terminal device receives a signal to be subjected to authentication processing from the in-vehicle device and detects that the reception intensity of a predetermined portion of the signal is saturated, the reception intensity is saturated. There is known a communication system in which an in-vehicle device is notified and the in-vehicle device retransmits at least a predetermined portion of the transmission intensity in response to the notification (see, for example, Patent Document 1).
しかしながら、従来の技術では、受信強度の飽和が生じる場合には、再送制御を実施することにより、再送制御を行わない場合に比べて認証処理の応答が遅くなり操作性が低下することがあった。
However, in the conventional technique, when the reception intensity is saturated, by performing the retransmission control, the response of the authentication process may be delayed compared to the case where the retransmission control is not performed, and the operability may be reduced. .
本発明に係る態様は、このような事情を考慮してなされたものであり、認証処理の操作性を向上させることができる携帯端末装置認証システム、車載装置、および携帯端末装置を提供することを目的の一つとする。
The aspect which concerns on this invention is made | formed in view of such a situation, and provides the portable terminal device authentication system which can improve the operativity of an authentication process, a vehicle-mounted apparatus, and a portable terminal device. One of the purposes.
上記技術課題を解決して係る目的を達成するために、本発明は以下の態様を採用した。
(1)本発明に係る一態様の携帯端末装置認証システムは、信号を送信する車載側送信部と、信号を受信する車載側受信部と、前記車載側送信部に前記リクエスト信号を送信させるとともに、前記車載側受信部によって受信されたアンサー信号を判定する車載側制御部と、を有する車載装置と、信号を受信する携帯側受信部と、信号を送信する携帯側送信部と、前記携帯側受信部が前記リクエスト信号を受信するのに応じて、前記リクエスト信号に対するアンサー信号を送信するように前記携帯側送信部を制御する携帯側制御部と、を有する携帯端末装置と、を備え、前記車載側制御部は、前記リクエスト信号として、受信信号強度が異なるように設定された複数の認証用信号を含む信号を前記車載側送信部に送信させ、前記携帯側受信部は、制御により受信感度特性の調整が可能であり、前記車載側送信部によって送信された信号を、前記リクエスト信号として受信し、前記携帯側制御部は、前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した前記複数の認証用信号を判別し、前記車載側制御部又は前記携帯側制御部は、前記複数の認証用信号の判別結果に基づいて前記携帯側受信部が正規のリクエスト信号を受信した通信であるか否かを判定する。 In order to solve the above technical problems and achieve the object, the present invention adopts the following aspects.
(1) A mobile terminal device authentication system according to an aspect of the present invention is configured to transmit a request signal to an in-vehicle side transmission unit that transmits a signal, an in-vehicle side reception unit that receives a signal, and the in-vehicle side transmission unit. A vehicle-mounted device that determines an answer signal received by the vehicle-mounted receiver, a vehicle-mounted device that receives the signal, a portable receiver that receives the signal, a portable transmitter that transmits the signal, and the portable device A portable terminal device having a portable side control unit that controls the portable side transmission unit to transmit an answer signal to the request signal in response to the reception unit receiving the request signal, and The in-vehicle side control unit causes the in-vehicle side transmission unit to transmit a signal including a plurality of authentication signals set so as to have different received signal strengths as the request signal. The reception sensitivity characteristic can be adjusted by control, the signal transmitted by the in-vehicle side transmission unit is received as the request signal, and the portable side control unit receives the authentication signal received by the portable side reception unit. Instructing the reception sensitivity characteristic of the portable-side receiver based on the intensity value, the plurality of authentication signals received after the reception sensitivity characteristic of the portable-side receiver is adjusted to the instructed reception sensitivity characteristic The in-vehicle side control unit or the portable side control unit determines whether or not the portable side receiving unit is a communication in which a normal request signal is received based on the determination results of the plurality of authentication signals. .
(1)本発明に係る一態様の携帯端末装置認証システムは、信号を送信する車載側送信部と、信号を受信する車載側受信部と、前記車載側送信部に前記リクエスト信号を送信させるとともに、前記車載側受信部によって受信されたアンサー信号を判定する車載側制御部と、を有する車載装置と、信号を受信する携帯側受信部と、信号を送信する携帯側送信部と、前記携帯側受信部が前記リクエスト信号を受信するのに応じて、前記リクエスト信号に対するアンサー信号を送信するように前記携帯側送信部を制御する携帯側制御部と、を有する携帯端末装置と、を備え、前記車載側制御部は、前記リクエスト信号として、受信信号強度が異なるように設定された複数の認証用信号を含む信号を前記車載側送信部に送信させ、前記携帯側受信部は、制御により受信感度特性の調整が可能であり、前記車載側送信部によって送信された信号を、前記リクエスト信号として受信し、前記携帯側制御部は、前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した前記複数の認証用信号を判別し、前記車載側制御部又は前記携帯側制御部は、前記複数の認証用信号の判別結果に基づいて前記携帯側受信部が正規のリクエスト信号を受信した通信であるか否かを判定する。 In order to solve the above technical problems and achieve the object, the present invention adopts the following aspects.
(1) A mobile terminal device authentication system according to an aspect of the present invention is configured to transmit a request signal to an in-vehicle side transmission unit that transmits a signal, an in-vehicle side reception unit that receives a signal, and the in-vehicle side transmission unit. A vehicle-mounted device that determines an answer signal received by the vehicle-mounted receiver, a vehicle-mounted device that receives the signal, a portable receiver that receives the signal, a portable transmitter that transmits the signal, and the portable device A portable terminal device having a portable side control unit that controls the portable side transmission unit to transmit an answer signal to the request signal in response to the reception unit receiving the request signal, and The in-vehicle side control unit causes the in-vehicle side transmission unit to transmit a signal including a plurality of authentication signals set so as to have different received signal strengths as the request signal. The reception sensitivity characteristic can be adjusted by control, the signal transmitted by the in-vehicle side transmission unit is received as the request signal, and the portable side control unit receives the authentication signal received by the portable side reception unit. Instructing the reception sensitivity characteristic of the portable-side receiver based on the intensity value, the plurality of authentication signals received after the reception sensitivity characteristic of the portable-side receiver is adjusted to the instructed reception sensitivity characteristic The in-vehicle side control unit or the portable side control unit determines whether or not the portable side receiving unit is a communication in which a normal request signal is received based on the determination results of the plurality of authentication signals. .
上記(1)の態様によれば、車載側制御部が、前記リクエスト信号として、受信信号強度が異なるように設定された複数の認証用信号を含む信号を前記車載側送信部に送信させる。携帯側受信部が、制御により受信感度特性の調整が可能であり、前記車載側送信部によって送信された信号を、前記リクエスト信号として受信する。携帯側制御部が、前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した前記複数の認証用信号を判別する。前記車載側制御部又は前記携帯側制御部は、前記複数の認証用信号の判別結果に基づいて前記携帯側受信部が正規のリクエスト信号を受信した通信であるか否かを判定する。この結果、携帯端末装置認証システムは、認証のセキュリティ性を向上させることができる。
According to the above aspect (1), the in-vehicle side control unit causes the in-vehicle side transmission unit to transmit a signal including a plurality of authentication signals set so that the received signal strengths are different as the request signal. The portable-side receiving unit can adjust the reception sensitivity characteristic by control, and receives the signal transmitted by the in-vehicle-side transmitting unit as the request signal. The portable side control unit instructs the reception sensitivity characteristic of the portable side reception unit based on the strength value of the authentication signal received by the portable side reception unit, and the portable side reception unit The plurality of authentication signals received after the reception sensitivity characteristic is adjusted are discriminated. The vehicle-mounted side control unit or the mobile side control unit determines whether or not the mobile side reception unit is a communication that has received a normal request signal based on the determination results of the plurality of authentication signals. As a result, the mobile terminal device authentication system can improve the security of authentication.
(2)上記(1)の態様において、前記携帯側制御部は、前記複数の認証用信号の前記判別結果を含む前記アンサー信号を前記携帯側送信部に送信させてもよい。
(2) In the aspect of the above (1), the portable side control unit may cause the portable side transmission unit to transmit the answer signal including the discrimination results of the plurality of authentication signals.
上記(2)の態様の場合、携帯端末装置認証システムは、上記構成と同様に、認証のセキュリティ性を向上させることができる。さらに、携帯端末装置認証システムは、前記携帯側制御部によって、前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した前記複数の認証用信号を判別し、前記複数の認証用信号の判別結果を含むアンサー信号を前記携帯側送信部に送信させることにより、複数の認証用信号の識別の精度を高めることができる。
In the case of the above aspect (2), the mobile terminal device authentication system can improve the security of authentication as in the above configuration. Further, the portable terminal device authentication system is instructed by the portable side control unit by instructing a reception sensitivity characteristic of the portable side receiving unit based on an intensity value of an authentication signal received by the portable side receiving unit. The plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver is adjusted to the received sensitivity characteristic, and the answer signal including the determination result of the plurality of authentication signals is determined in the portable transmitter By transmitting to, it is possible to improve the accuracy of identification of a plurality of authentication signals.
(3)上記(1)又は(2)の態様において、前記携帯側制御部は、前記携帯側受信部によって受信した認証用信号の強度値に基づいて調整された前記携帯側受信部の受信感度特性のもとで前記複数の認証用信号を受信させて、前記強度値に基づいて前記複数の認証用信号を判別し、前記アンサー信号を前記携帯側送信部に送信させてもよい。
(3) In the aspect of the above (1) or (2), the portable side control unit is configured to receive the reception sensitivity of the portable side receiving unit adjusted based on an intensity value of an authentication signal received by the portable side receiving unit. The plurality of authentication signals may be received based on characteristics, the plurality of authentication signals may be determined based on the intensity value, and the answer signal may be transmitted to the portable-side transmission unit.
上記(3)の態様の場合、携帯端末装置認証システムは、上記構成と同様に、認証のセキュリティ性を向上させることができる。さらに、携帯端末装置認証システムは、前記携帯側受信部によって受信した認証用信号の強度値に基づいて調整された前記携帯側受信部の受信感度特性のもとで前記携帯側受信部に前記複数の認証用信号を受信させることにより、複数の認証用信号の識別の精度を高めることができる。
In the case of the above aspect (3), the mobile terminal device authentication system can improve the security of authentication as in the above configuration. Further, the mobile terminal device authentication system is configured such that the plurality of mobile side receivers receive the plurality of the mobile side receivers based on reception sensitivity characteristics of the mobile side receivers adjusted based on an intensity value of an authentication signal received by the mobile side receivers. By receiving this authentication signal, it is possible to improve the accuracy of identification of a plurality of authentication signals.
(4)上記(1)から(3)の何れか1つの態様において、前記車載側制御部は、前記認証用信号の送信時間と、前記認証用信号の判別結果とを比較し、当該比較の結果に基づいて、前記携帯端末装置が受信した信号が正規のリクエスト信号であるか否かを判定するようにしてもよい。
(4) In any one of the above aspects (1) to (3), the on-vehicle side control unit compares the transmission time of the authentication signal with the determination result of the authentication signal, and Based on the result, it may be determined whether the signal received by the mobile terminal device is a regular request signal.
上記(4)の態様の場合、携帯端末装置認証システムは、前記認証用信号の送信時間と、前記認証用信号の判別結果とを比較できるため、認証時の判定精度を高めることができる。
In the case of the above aspect (4), since the mobile terminal device authentication system can compare the transmission time of the authentication signal and the determination result of the authentication signal, the determination accuracy at the time of authentication can be improved.
(5)上記(1)から(3)の何れか1つの態様において、前記認証用信号は、第1の信号と、前記第1の信号に比して信号強度が小さい第2の信号とを含み、前記携帯側制御部は、前記第1の信号と前記第2の信号とを識別可能な第1閾値に基づいて前記認証用信号を判別し、前記第1の信号と判別した回数と、前記第2の信号と判別した回数とを含む情報を、前記複数の認証用信号の前記判別結果として含む前記アンサー信号を前記携帯側送信部に送信させ、前記車載側制御部は、前記第1の信号と判別した前記回数と前記第2の信号と判別した前記回数とを含む前記情報に基づいて、前記車載側受信部によって受信された前記アンサー信号を判定するようにしてもよい。
(5) In any one of the above aspects (1) to (3), the authentication signal includes a first signal and a second signal having a signal strength smaller than that of the first signal. The portable-side control unit determines the authentication signal based on a first threshold that can identify the first signal and the second signal, and the number of times determined as the first signal; The answer signal including the information including the second signal and the number of times of determination as the determination result of the plurality of authentication signals is transmitted to the portable-side transmitter, and the in-vehicle-side controller is configured to The answer signal received by the in-vehicle-side receiving unit may be determined based on the information including the number of times determined as a signal of the first and the number of times determined as the second signal.
上記(5)の態様の場合、携帯端末装置認証システムは、信号の判別を回数に基づいて実施することにより、認証時の判定精度をより高めることができる。
In the case of the above aspect (5), the mobile terminal device authentication system can further increase the determination accuracy during authentication by performing signal determination based on the number of times.
(6)上記(1)から(3)の何れか1つの態様において、認証用信号は、第1の信号と、前記第1の信号に比して信号強度が小さい第2の信号と、前記第2の信号に比して信号強度が小さい第3の信号とを含み、前記携帯側制御部は、前記第1の信号と前記第2の信号とを識別可能な第1閾値と、前記第2の信号と前記第3の信号とを識別可能な第2閾値とに基づいて前記認証用信号を判別し、前記第1の信号と判別した回数と、前記第2の信号と判別した回数と、前記第3の信号と判別した回数とを含む情報を、前記複数の認証用信号の前記判別結果として含む前記アンサー信号を前記携帯側送信部に送信させ、前記車載側制御部は、前記第1の信号と判別した前記回数と前記第2の信号と判別した前記回数と前記第3の信号と判別した前記回数とを含む前記情報に基づいて、前記車載側受信部によって受信された前記アンサー信号を判定するようにしてもよい。
(6) In any one of the above aspects (1) to (3), the authentication signal includes a first signal, a second signal having a signal strength smaller than that of the first signal, A third signal having a signal strength smaller than that of the second signal, and the portable control unit includes a first threshold that can distinguish the first signal from the second signal; The authentication signal is discriminated based on a second threshold that can discriminate between the second signal and the third signal, the number of times of discrimination from the first signal, and the number of times of discrimination from the second signal, The answer signal including the information including the third signal and the number of times of determination as the determination result of the plurality of authentication signals is transmitted to the portable-side transmitter, and the in-vehicle-side controller is The number of times determined to be a signal of 1 and the number of times determined to be a second signal were determined to be a third signal. Based on the information including the serial number, it may be determined the answer signal received by the vehicle-side receiving unit.
上記(6)の態様の場合、携帯端末装置認証システムは、信号の判別を回数に基づいて実施することにより、認証時の判定精度をより高めることができる。
In the case of the above aspect (6), the mobile terminal device authentication system can further increase the determination accuracy during authentication by performing signal determination based on the number of times.
(7)上記(5)又は(6)の態様において、前記車載側制御部は、前記第2の信号と判別した前記回数が0であった場合、前記車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にないと判定し、前記第2の信号と判別した前記回数が1以上であった場合、前記車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にあると判定するようにしてもよい。
(7) In the aspect of the above (5) or (6), when the number of times that the vehicle-mounted control unit has determined that the second signal is 0, the signal received by the vehicle-mounted receiving unit is When it is determined that the reception sensitivity characteristic of the portable-side receiver is not in an appropriate state and the number of times determined as the second signal is 1 or more, the signal received by the in-vehicle receiver is You may make it determine with it being in an appropriate state with respect to the reception sensitivity characteristic of the said portable side receiving part.
上記(7)の態様の場合、携帯端末装置認証システムは、第2の信号と判別したことにより、車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にあると判定することができ、認証時の判定精度をより高めることができる。
In the case of the above aspect (7), the mobile terminal device authentication system determines that the signal received by the in-vehicle side receiving unit is appropriate for the reception sensitivity characteristic of the mobile side receiving unit because it is determined as the second signal. It can be determined that it is in a state, and the determination accuracy at the time of authentication can be further increased.
(8)上記(1)から(7)の何れか1つの態様において、前記車載側制御部は、前記アンサー信号に含まれる前記複数の認証用信号の前記判別結果に基づいて、前記携帯側受信部によって受信された信号が、前記車載側送信部によって送信された前記リクエスト信号であるか否かを判定するようにしてもよい。
(8) In any one of the above aspects (1) to (7), the in-vehicle-side control unit receives the portable-side reception based on the determination results of the plurality of authentication signals included in the answer signal. It may be determined whether the signal received by the unit is the request signal transmitted by the vehicle-mounted side transmission unit.
上記(8)の態様の場合、携帯端末装置認証システムは、携帯側受信部によって受信された信号が、前記車載側送信部によって送信されたリクエスト信号であるか否かを判定することにより、認証時の判定精度をより高めることができる。
In the case of the above aspect (8), the mobile terminal device authentication system performs authentication by determining whether or not the signal received by the mobile side receiver is a request signal transmitted by the in-vehicle side transmitter. The time determination accuracy can be further increased.
(9)上記(1)から(8)の何れか1つの態様において、前記車載側制御部は、前記アンサー信号に含まれる前記複数の認証用信号の前記判別結果に基づいて、前記車載側受信部によって受信された信号が、前記携帯側送信部によって送信された前記アンサー信号であるか否かを判定するようにしてもよい。
(9) In any one of the above aspects (1) to (8), the in-vehicle side control unit receives the in-vehicle side reception based on the determination results of the plurality of authentication signals included in the answer signal. It may be determined whether the signal received by the unit is the answer signal transmitted by the portable-side transmission unit.
上記(9)の態様の場合、携帯端末装置認証システムは、前記車載側受信部によって受信された信号が、前記携帯側送信部によって送信された前記アンサー信号であるか否かを判定することにより、認証時の判定精度をより高めることができる。
In the case of the above aspect (9), the mobile terminal device authentication system determines whether the signal received by the in-vehicle side receiving unit is the answer signal transmitted by the mobile side transmitting unit. The determination accuracy at the time of authentication can be further increased.
(10)上記(1)から(9)の何れか1つの態様において、車載側制御部は、予め定められたパターンのうちから不規則に決定された送信時間の前記認証用信号を前記車載側送信部に送信させるようにしてもよい。
(10) In any one of the above aspects (1) to (9), the in-vehicle side control unit outputs the authentication signal having an irregularly determined transmission time from a predetermined pattern. You may make it make a transmission part transmit.
上記(10)の態様の場合、携帯端末装置認証システムは、予め定められたパターンのうちから不規則に決定された送信時間の認証用信号を認証処理に用いることにより、認証のセキュリティ性を向上させることができる。
In the case of the above aspect (10), the mobile terminal device authentication system improves the security of authentication by using an authentication signal of an irregularly determined transmission time among predetermined patterns for authentication processing. Can be made.
(11)本発明に係る一態様の車載装置は、携帯端末装置へリクエスト信号を送信する車載側送信部と、信号を受信する車載側受信部と、前記車載側送信部に前記リクエスト信号を送信させるとともに、前記携帯端末装置から送信され前記車載側受信部によって受信されたアンサー信号を判定する車載側制御部と、を備え、前記車載側制御部は、前記リクエスト信号として、受信信号強度が異なるように設定された複数の認証用信号を含む信号を前記車載側送信部に送信させ、前記車載側受信部は、前記携帯端末装置によって受信した認証用信号の強度値に基づいて前記携帯端末装置の受信感度特性が調整されて、前記携帯端末装置の受信感度特性が調整された後に前記携帯端末装置が受信した前記複数の認証用信号が判別された結果を含む信号を受信して、前記車載側制御部は、前記車載側受信部によって受信された信号に含まれる前記複数の認証用信号の判別結果に基づいて、前記車載側受信部によって受信された前記アンサー信号から、前記携帯端末装置が受信した信号が正規のリクエスト信号であるか否かを判定する。
(11) An in-vehicle device according to an aspect of the present invention includes an in-vehicle side transmission unit that transmits a request signal to a mobile terminal device, an in-vehicle side reception unit that receives a signal, and the request signal transmitted to the in-vehicle side transmission unit. And an in-vehicle side control unit that determines an answer signal transmitted from the mobile terminal device and received by the in-vehicle side reception unit, wherein the in-vehicle side control unit has different received signal strengths as the request signal A signal including a plurality of authentication signals set as described above is transmitted to the in-vehicle side transmission unit, and the in-vehicle side reception unit is based on an intensity value of the authentication signal received by the mobile terminal device. Including the result of the determination of the plurality of authentication signals received by the mobile terminal device after the reception sensitivity property of the mobile terminal device is adjusted And the vehicle-mounted side control unit receives the answer received by the vehicle-mounted side receiving unit based on the determination result of the plurality of authentication signals included in the signal received by the vehicle-mounted side receiving unit. From the signal, it is determined whether or not the signal received by the mobile terminal device is a regular request signal.
上記(11)の態様によれば、認証用信号の強度値に基づいて前記携帯端末装置の受信感度特性が調整されて、携帯端末装置の受信感度特性が調整された後に携帯端末装置が受信した複数の認証用信号が判別された結果を含む信号を車載側受信部により受信することで、車載側制御部が、車載側受信部によって受信された信号に含まれる前記複数の認証用信号の判別結果に基づいて、前記車載側受信部によって受信されたアンサー信号から、前記携帯端末装置が受信した信号が正規のリクエスト信号であるか否かを判定することができる。
According to the aspect of (11) above, the reception sensitivity characteristic of the mobile terminal device is adjusted based on the intensity value of the authentication signal, and the mobile terminal device receives the signal after the reception sensitivity characteristic of the mobile terminal device is adjusted. The in-vehicle side receiving unit receives the signal including the result of the determination of the plurality of authentication signals by the in-vehicle side receiving unit, so that the in-vehicle side control unit determines the plurality of authentication signals included in the signal received by the in-vehicle side receiving unit. Based on the result, it is possible to determine whether or not the signal received by the mobile terminal device is a regular request signal from the answer signal received by the in-vehicle side receiving unit.
(12)本発明に係る一態様の携帯端末装置は、車載装置からのリクエスト信号を受信する携帯側受信部と、信号を送信する携帯側送信部と、前記携帯側受信部が前記リクエスト信号を受信するのに応じて、前記リクエスト信号に対するアンサー信号を前記車載装置へ送信するように前記携帯側送信部を制御する携帯側制御部と、を備え、前記携帯側受信部は、制御により受信感度特性の調整が可能であり、前記車載装置から送信された前記リクエスト信号を受信し、前記携帯側制御部は、前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した複数の認証用信号を判別する。
(12) A mobile terminal device according to an aspect of the present invention includes a mobile-side receiver that receives a request signal from an in-vehicle device, a mobile-side transmitter that transmits a signal, and the mobile-side receiver receives the request signal. A portable-side control unit that controls the portable-side transmission unit so as to transmit an answer signal corresponding to the request signal to the in-vehicle device in response to reception, the portable-side reception unit receiving sensitivity by control Characteristics can be adjusted, the request signal transmitted from the in-vehicle device is received, and the portable side control unit receives the portable side reception based on the strength value of the authentication signal received by the portable side reception unit A reception sensitivity characteristic of the receiver unit is instructed, and a plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver is adjusted to the instructed reception sensitivity characteristic are discriminated.
上記(12)の態様によれば、携帯側制御部が、前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した前記複数の認証用信号を判別することができる。
According to the above aspect (12), the portable side control unit instructs the reception sensitivity characteristic of the portable side receiving unit based on the strength value of the authentication signal received by the portable side receiving unit, and is instructed. The plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver is adjusted to the reception sensitivity characteristic.
本発明に係る態様によれば、認証処理の操作性を向上させることができる携帯端末装置認証システム、車載装置、および携帯端末装置を提供することができる。
According to the aspect of the present invention, it is possible to provide a mobile terminal device authentication system, an in-vehicle device, and a mobile terminal device that can improve the operability of authentication processing.
以下、本発明の実施の形態を、添付の図面に示した本発明の一実施例に基づいて説明する。
Hereinafter, an embodiment of the present invention will be described based on an example of the present invention shown in the accompanying drawings.
図1は、本実施形態に係る携帯端末装置認証システム1を示す構成図である。同図に示される携帯端末装置認証システム1は、自動車や原動機付自転車等の車両に適用され、同車両の施錠時の利用を制限する。携帯端末装置認証システム1は、機械的な鍵を使わずに、携帯端末装置200を認証することで、車両の施錠、解錠、エンジン始動等の制御対象にあたる装置を駆動させることができる。
FIG. 1 is a configuration diagram showing a mobile terminal device authentication system 1 according to the present embodiment. The mobile terminal device authentication system 1 shown in the figure is applied to a vehicle such as an automobile or a motorbike, and restricts the use of the vehicle when locked. The mobile terminal device authentication system 1 can drive a device corresponding to an object to be controlled such as locking, unlocking, or starting an engine by authenticating the mobile terminal device 200 without using a mechanical key.
例えば、小型車両であるスクータVの車体フレームには、エンジンEおよび変速機(不図示)を含むパワーユニットPが揺動可能に支承され、パワーユニットPによって駆動される後輪WFが該パワーユニットPの後部に軸支される。パワーユニットPは、施錠状態にある場合、駆動が制限される(駆動制限状態)。スクータVの車体フレームの前部には、ハンドルHが設けられており、ハンドルHは、連結軸を介して前輪WRの向きを調整可能に支持される。ハンドルHは、施錠状態にある場合、上記の連結軸の回転がハンドルロック部16により制限される。ハンドルロック部16は、連結軸の回転を制限する機構を含むアクチュエータ部18を備える。
For example, a power unit P including an engine E and a transmission (not shown) is swingably supported on a body frame of a scooter V that is a small vehicle, and a rear wheel WF that is driven by the power unit P is a rear portion of the power unit P. Is pivotally supported. When the power unit P is in the locked state, driving is restricted (driving restricted state). A handle H is provided at the front of the body frame of the scooter V, and the handle H is supported via a connecting shaft so that the direction of the front wheel WR can be adjusted. When the handle H is in the locked state, the rotation of the connecting shaft is restricted by the handle lock portion 16. The handle lock unit 16 includes an actuator unit 18 including a mechanism that limits the rotation of the connecting shaft.
なお、パワーユニットPには、キックペダル6の踏込み操作により、パワーユニットPに含まれる発電機Gを駆動し得るキック作動部7が設けられる。例えば、スクータVは、バッテリ上がりが生じた場合に、キック作動部7のキック動作により発電して得られた電力を利用することができる。
The power unit P is provided with a kick actuating portion 7 that can drive the generator G included in the power unit P when the kick pedal 6 is depressed. For example, when the battery runs out, the scooter V can use the electric power obtained by generating power by the kick operation of the kick operation unit 7.
スクータVには、バッテリBが搭載されており、バッテリBの充電状態(端子電圧)に応じて、パワーユニットPの始動方法が切り替わる。
The battery B is mounted on the scooter V, and the starting method of the power unit P is switched according to the charging state (terminal voltage) of the battery B.
バッテリBには、発電機Gが発電した電力が変換部8を介して供給される。エンジンEが駆動されている場合には、エンジンEによって発電機Gが駆動される。例えば、キック作動部7のキックペダル6を踏込み操作することにより発電機Gから出力される電力によりバッテリBが充電される。この場合、変換部8は整流器およびレギュレータとして機能する。
The electric power generated by the generator G is supplied to the battery B via the converter 8. When the engine E is being driven, the generator G is driven by the engine E. For example, the battery B is charged by the electric power output from the generator G by depressing the kick pedal 6 of the kick operating unit 7. In this case, the converter 8 functions as a rectifier and a regulator.
さらに、バッテリBに蓄えた電力を発電機Gに供給して、発電機GをエンジンEのスターターとして用いてもよい。この場合、変換部8は、発電機Gをモーターとして機能させるように電力を供給する。
Furthermore, the electric power stored in the battery B may be supplied to the generator G, and the generator G may be used as a starter for the engine E. In this case, the converter 8 supplies power so that the generator G functions as a motor.
また、エンジンEが備える点火プラグ(不図示)には、メインリレー(MRY)12の状態に応じて、点火回路13から点火電力が供給される。
Further, ignition power (not shown) provided in the engine E is supplied from the ignition circuit 13 according to the state of the main relay (MRY) 12.
ところで、たとえば携帯端末装置200がスクータVに対応する正規のものであると照合された場合、車載装置100は、各種制限状態を解除する。各種制限状態には、ハンドルHの施錠、パワーユニットPの駆動制限が含まれる。
Incidentally, for example, when it is verified that the mobile terminal device 200 is a legitimate one corresponding to the scooter V, the in-vehicle device 100 cancels various restriction states. Various restriction states include locking of the handle H and driving restriction of the power unit P.
(車載装置100の構成)
車載装置100は、電源部20と、車載側制御部30と、車載側送信部40と、車載側受信部50と、駆動回路部61と、入力回路部62と、メインスイッチ状態取得部63と、メインリレー駆動部64とを備える。さらに、車載装置100は、スターター駆動部65を備えるように構成してもよい。 (Configuration of in-vehicle device 100)
The in-vehicle device 100 includes a power source unit 20, an in-vehicle side control unit 30, an in-vehicle side transmission unit 40, an in-vehicle side reception unit 50, a drive circuit unit 61, an input circuit unit 62, and a main switch state acquisition unit 63. The main relay drive unit 64 is provided. Further, the in-vehicle device 100 may be configured to include a starter driving unit 65.
車載装置100は、電源部20と、車載側制御部30と、車載側送信部40と、車載側受信部50と、駆動回路部61と、入力回路部62と、メインスイッチ状態取得部63と、メインリレー駆動部64とを備える。さらに、車載装置100は、スターター駆動部65を備えるように構成してもよい。 (Configuration of in-vehicle device 100)
The in-
電源部20は、バッテリBまたは発電機Gを電源とし、バッテリBの端子電圧を、電圧+Vregを基準に安定化して車載側制御部30等の各部に供給する。車載側制御部30等の各部は、安定化された直流電圧をそれぞれの電源にする。電源部20は、バッテリBの端子電圧の予め定められた閾値電圧VTH以下の電圧低下を監視して、検出結果を出力する。
The power supply unit 20 uses the battery B or the generator G as a power source, stabilizes the terminal voltage of the battery B with reference to the voltage + Vreg, and supplies the stabilized voltage to each unit such as the in-vehicle control unit 30. Each unit such as the in-vehicle control unit 30 uses a stabilized DC voltage as a power source. The power supply unit 20 monitors the voltage drop below the predetermined threshold voltage VTH of the terminal voltage of the battery B, and outputs the detection result.
車載側送信部40は、携帯端末装置200を呼び出すリクエスト信号を送信する。車載側送信部40から送信される信号をLF信号という場合がある。リクエスト信号(LF信号)には、携帯端末装置200を特定する識別情報(以下、「携帯端末装置識別情報」と称する)と、複数の認証処理用の情報(以下、「認証用情報」と称する)とが含まれる。
本実施形態では、説明を簡略化するために、リクエスト信号に含まれる複数の認証用情報として、第1の認証用情報と、第2の認証用情報と、第3の認証用情報との3種類を代表して説明するが、認証用情報は、これら情報のみに限定されるものでない。例えば、第4等の認証用情報が含まれていてもよい。認証用情報は、「認証用信号」の一例である。また、第1の認証用情報と第2の認証用情報と第3の認証用情報とは、「第1の信号」と「第2の信号」と「第3の信号」の一例である。 The in-vehicleside transmission unit 40 transmits a request signal for calling the mobile terminal device 200. A signal transmitted from the in-vehicle side transmission unit 40 may be referred to as an LF signal. In the request signal (LF signal), identification information for identifying the mobile terminal device 200 (hereinafter referred to as “mobile terminal device identification information”) and a plurality of pieces of authentication processing information (hereinafter referred to as “authentication information”). ) And
In the present embodiment, in order to simplify the description, as the plurality of pieces of authentication information included in the request signal, 3 of the first authentication information, the second authentication information, and the third authentication information. Although the type will be described as a representative, the authentication information is not limited to only this information. For example, fourth authentication information may be included. The authentication information is an example of an “authentication signal”. The first authentication information, the second authentication information, and the third authentication information are examples of “first signal”, “second signal”, and “third signal”.
本実施形態では、説明を簡略化するために、リクエスト信号に含まれる複数の認証用情報として、第1の認証用情報と、第2の認証用情報と、第3の認証用情報との3種類を代表して説明するが、認証用情報は、これら情報のみに限定されるものでない。例えば、第4等の認証用情報が含まれていてもよい。認証用情報は、「認証用信号」の一例である。また、第1の認証用情報と第2の認証用情報と第3の認証用情報とは、「第1の信号」と「第2の信号」と「第3の信号」の一例である。 The in-vehicle
In the present embodiment, in order to simplify the description, as the plurality of pieces of authentication information included in the request signal, 3 of the first authentication information, the second authentication information, and the third authentication information. Although the type will be described as a representative, the authentication information is not limited to only this information. For example, fourth authentication information may be included. The authentication information is an example of an “authentication signal”. The first authentication information, the second authentication information, and the third authentication information are examples of “first signal”, “second signal”, and “third signal”.
車載側受信部50は、外部の装置によって送信された信号を受信する。例えば、車載側受信部50は、携帯端末装置200によって送信される信号を受信する。以下、携帯端末装置200から送信され、車載側受信部50が受信する信号をRF信号と称して説明する場合がある。RF信号の搬送周波数は、前述のLF信号の搬送周波数に対して比較的高い。
The in-vehicle side receiving unit 50 receives a signal transmitted by an external device. For example, the in-vehicle side receiving unit 50 receives a signal transmitted by the mobile terminal device 200. Hereinafter, a signal transmitted from the mobile terminal device 200 and received by the in-vehicle side receiving unit 50 may be referred to as an RF signal. The carrier frequency of the RF signal is relatively higher than the carrier frequency of the LF signal.
駆動回路部61は、メインスイッチ11の導通状態でアクチュエータ部18を駆動する。メインスイッチ11は、例えば、物理的なキー(鍵)によって導通状態、或いは非導通状態にされる。なお、アクチュエータ部18は、車両の走行を不能とするためにハンドルHをロックするハンドルロック部16に含まれ、ハンドルロック部16の施錠および解錠状態を切換える。
The drive circuit unit 61 drives the actuator unit 18 while the main switch 11 is in a conductive state. For example, the main switch 11 is turned on or off by a physical key. The actuator unit 18 is included in the handle lock unit 16 that locks the handle H in order to disable traveling of the vehicle, and switches between locking and unlocking of the handle lock unit 16.
メインスイッチ11が導通状態である場合、駆動回路部61は、アクチュエータ部18を駆動してハンドルHをアンロックしてアンロック状態を保持させる。また、メインスイッチ11が非導通状態である場合、駆動回路部61は、アクチュエータ部18を駆動してハンドルHをロックしてロック状態を保持させる。
When the main switch 11 is in the conductive state, the drive circuit unit 61 drives the actuator unit 18 to unlock the handle H and keep the unlocked state. When the main switch 11 is in a non-conducting state, the drive circuit unit 61 drives the actuator unit 18 to lock the handle H and keep the locked state.
入力回路部62は、起動スイッチ17からの信号を受け付ける。起動スイッチ17は、例えば、ハンドルHに設けられ、オン状態、あるいはオフ状態になるように乗員によって操作される。
The input circuit unit 62 receives a signal from the start switch 17. The start switch 17 is provided on the handle H, for example, and is operated by the occupant so as to be in an on state or an off state.
メインスイッチ状態取得部63は、乗員の操作に応じて導通することを可能としたメインスイッチ11の導通状態を取得する。
The main switch state acquisition unit 63 acquires the conduction state of the main switch 11 that can be turned on according to the operation of the occupant.
メインリレー駆動部64は、車載側制御部30の制御により、メインリレー14のオン状態とオフ状態とを切換える。
The main relay drive unit 64 switches between the on state and the off state of the main relay 14 under the control of the in-vehicle side control unit 30.
スターター駆動部65は、車載側制御部30からの制御により、パワーユニットPを始動させるための駆動信号を供給する。例えば、スターター駆動部65は、発電機GをエンジンEのスターターとして利用する際の駆動信号を変換部8に供給する。
The starter driving unit 65 supplies a driving signal for starting the power unit P under the control of the in-vehicle side control unit 30. For example, the starter drive unit 65 supplies a drive signal when using the generator G as a starter of the engine E to the conversion unit 8.
車載側制御部30は、始動制御部31と、通信制御部32と、判定部33と、駆動制御部34と、記憶部35とを備える。始動制御部31と、通信制御部32と、判定部33と、駆動制御部34とのうち一部または全部は、CPU(Central Processing Unit)等のプロセッサがプログラムを実行することにより機能するソフトウェア機能部である。また、これらのうち一部または全部は、LSI(Large Scale Integration)やASIC(Application Specific Integrated Circuit)等のハードウェア機能部であってもよい。また、記憶部35は、ROM(Read Only Memory)やRAM(Random Access Memory)、HDD(Hard Disk Drive)、フラッシュメモリ等で実現される。プロセッサが実行するプログラムは、予め記憶部35に格納されていてもよいし、外部装置からダウンロードされてもよい。また、プログラムを格納した可搬型記憶媒体が図示しないドライブ装置に装着されることで記憶部35にインストールされてもよい。
The in-vehicle side control unit 30 includes a start control unit 31, a communication control unit 32, a determination unit 33, a drive control unit 34, and a storage unit 35. Some or all of the start control unit 31, the communication control unit 32, the determination unit 33, and the drive control unit 34 are software functions that function when a processor such as a CPU (Central Processing Unit) executes a program. Part. In addition, some or all of these may be hardware function units such as LSI (Large Scale Integration) and ASIC (Application Specific Specific Integrated Circuit). The storage unit 35 is realized by a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), a flash memory, or the like. The program executed by the processor may be stored in advance in the storage unit 35 or may be downloaded from an external device. Further, the portable storage medium storing the program may be installed in the storage unit 35 by being mounted on a drive device (not shown).
例えば、記憶部35は、車載側制御部30の各部を機能させるためのプログラム、及び、車載装置100に対応する携帯端末装置200の識別情報などを保持する。
For example, the storage unit 35 holds a program for causing each unit of the in-vehicle side control unit 30 to function, identification information of the mobile terminal device 200 corresponding to the in-vehicle device 100, and the like.
始動制御部31は、リクエスト信号の送信要求を検知する。リクエスト信号の送信要求は、例えば、起動スイッチ17の操作などに起因する。例えば、始動制御部31は、メインスイッチ11がオフ状態、すなわち、ハンドルHがロック状態(車両の走行が不可能な状態)であり、起動スイッチ17がオン状態である場合に、リクエスト信号の送信要求を検知する。
The start control unit 31 detects a request signal transmission request. The request signal transmission request is caused by, for example, an operation of the activation switch 17. For example, the start control unit 31 transmits a request signal when the main switch 11 is in an off state, that is, when the handle H is in a locked state (the vehicle cannot travel) and the start switch 17 is in an on state. Detect requests.
通信制御部32は、始動制御部31によってリクエスト信号の送信要求が検知された場合に、車載側送信部40を制御してリクエスト信号を送信させる。より具体的には、通信制御部32は、メインスイッチ11がオフ状態、すなわち、ハンドルHがロック状態(車両の走行が不可能な状態)である場合において、起動スイッチ17がオン状態になったときに、車載側送信部40にリクエスト信号を送信させる。
When the start control unit 31 detects a request signal transmission request, the communication control unit 32 controls the in-vehicle side transmission unit 40 to transmit the request signal. More specifically, the communication control unit 32 indicates that the start switch 17 is turned on when the main switch 11 is in the off state, that is, when the handle H is in the locked state (the vehicle cannot travel). Sometimes, the in-vehicle side transmission unit 40 is caused to transmit a request signal.
なお、通信制御部32が車載側送信部40にリクエスト信号を送信させる状況において、バッテリBには、リクエスト信号の送信要求に応じてリクエスト信号を送信する際に必要となる電力が蓄えられているものとする。
In a situation where the communication control unit 32 causes the in-vehicle side transmission unit 40 to transmit a request signal, the battery B stores power necessary for transmitting the request signal in response to a request signal transmission request. Shall.
一方、リクエスト信号の送信に要する電力がバッテリBに蓄えられていない場合、メインスイッチ11がオン状態となって、車載装置100に電力を供給する発電機Gを駆動するキック作動部7が操作され、必要な電力がバッテリBに蓄電されるまで待機する。
On the other hand, when the power required for transmitting the request signal is not stored in the battery B, the main switch 11 is turned on, and the kick operating unit 7 that drives the generator G that supplies power to the in-vehicle device 100 is operated. The system waits until necessary power is stored in the battery B.
判定部33は、車載側受信部50によって受信された信号を解読し、解読した結果に基づいて、車載側受信部50によって受信された信号がリクエスト信号に対する信号であるか否かを判定する。以下、リクエスト信号に対する信号を、「アンサー信号」と称する。
The determining unit 33 decodes the signal received by the in-vehicle side receiving unit 50, and determines whether the signal received by the in-vehicle side receiving unit 50 is a signal for the request signal based on the decoded result. Hereinafter, a signal corresponding to the request signal is referred to as an “answer signal”.
例えば、判定部33は、車載側受信部50によって受信された信号が、リクエスト信号の送信先である携帯端末装置200によって送信されたアンサー信号であると判定できた場合に、車載側受信部50の受信元の装置(この場合、携帯端末装置200)が予め定められた正規の装置であると判定し、認証に成功したと判定する。
For example, when the determination unit 33 determines that the signal received by the in-vehicle side receiving unit 50 is an answer signal transmitted by the mobile terminal device 200 that is the transmission destination of the request signal, the in-vehicle side receiving unit 50 Device (in this case, the mobile terminal device 200) is determined to be a predetermined regular device, and it is determined that the authentication is successful.
一方、判定部33は、車載側受信部50によって受信された信号が、リクエスト信号の送信先である携帯端末装置200によって送信されたアンサー信号であると判定できない場合に、車載側受信部50の受信元の装置が予め定められた正規の装置でないと判定し、認証に失敗したと判定する。例えば、判定部33は、携帯端末装置200と異なる装置から信号が送られてきた場合に、この装置を正規の装置でないと判定する。
On the other hand, when the determination unit 33 cannot determine that the signal received by the in-vehicle side reception unit 50 is the answer signal transmitted by the mobile terminal device 200 that is the transmission destination of the request signal, It is determined that the receiving device is not a predetermined regular device, and it is determined that the authentication has failed. For example, when a signal is transmitted from a device different from the mobile terminal device 200, the determination unit 33 determines that this device is not a regular device.
また、判定部33は、入力回路部62から入力される信号に基づいて、起動スイッチ17の動作状態を判定する。
Further, the determination unit 33 determines the operating state of the activation switch 17 based on the signal input from the input circuit unit 62.
また、判定部33は、車載側受信部50によって信号が受信されたか否かを判定する。
Further, the determination unit 33 determines whether or not a signal is received by the in-vehicle side reception unit 50.
駆動制御部34は、判定部33の判定結果に応じて、ハンドルHのロック状態と、エンジンEの始動制限とを制御する。例えば、駆動制御部34は、判定部33によって認証に成功したと判定された場合、すなわち、車載側受信部50によって受信された信号が、リクエスト信号の送信先である携帯端末装置200によって送信されたアンサー信号である場合に、ハンドルのロック状態を解除し、エンジンEの始動制限を解除する。例えば、駆動制御部34は、駆動回路部61を介してハンドルロック部16のアクチュエータ部18を駆動させて、ハンドルのロック状態を解除する。駆動制御部34は、スターター駆動部65を介して、発電機Gを駆動させることで、エンジンEを始動させる。
The drive control unit 34 controls the locked state of the handle H and the start limit of the engine E according to the determination result of the determination unit 33. For example, when it is determined by the determination unit 33 that the authentication is successful, the drive control unit 34, that is, the signal received by the in-vehicle side reception unit 50 is transmitted by the mobile terminal device 200 that is the transmission destination of the request signal. If the response signal is a response signal, the locked state of the steering wheel is released and the engine E start restriction is released. For example, the drive control unit 34 drives the actuator unit 18 of the handle lock unit 16 via the drive circuit unit 61 to release the lock state of the handle. The drive control unit 34 starts the engine E by driving the generator G via the starter driving unit 65.
(携帯端末装置200の構成)
携帯端末装置200は、車載装置100により認証される。車載装置100の記憶部35には、携帯端末装置200の識別情報が記憶されている。携帯端末装置200は、携帯側受信部210と、携帯側送信部220と、携帯側制御部230とを備える。 (Configuration of mobile terminal device 200)
The mobileterminal device 200 is authenticated by the in-vehicle device 100. Identification information of the mobile terminal device 200 is stored in the storage unit 35 of the in-vehicle device 100. The mobile terminal device 200 includes a mobile-side receiving unit 210, a mobile-side transmitting unit 220, and a mobile-side control unit 230.
携帯端末装置200は、車載装置100により認証される。車載装置100の記憶部35には、携帯端末装置200の識別情報が記憶されている。携帯端末装置200は、携帯側受信部210と、携帯側送信部220と、携帯側制御部230とを備える。 (Configuration of mobile terminal device 200)
The mobile
携帯側受信部210は、車載装置100によって送信されるリクエスト信号を受信する。携帯側送信部220は、携帯側制御部230によって生成されたアンサー信号を、リクエスト信号の受信元である車載装置100に送信する。なお、携帯側受信部210は、互いに異なる複数の方向を軸にした感度特性(指向性)を有するように構成してもよい。
The mobile-side receiving unit 210 receives a request signal transmitted by the in-vehicle device 100. The portable side transmission unit 220 transmits the answer signal generated by the portable side control unit 230 to the in-vehicle device 100 that is the reception source of the request signal. Note that the mobile-side receiving unit 210 may be configured to have sensitivity characteristics (directivity) with a plurality of different directions as axes. *
携帯側制御部230は、例えば、信号強度測定部231と、信号判定部232と、信号生成部233と、受信制御部234とを備える。信号強度測定部231は、携帯側受信部210によって受信されたリクエスト信号の信号強度を測定する。なお、携帯側受信部210が互いに異なる複数の方向を軸にした感度特性を有する場合、信号強度測定部231は、当該複数の軸ごとに検出された信号強度を軸ごとに測定してもよい。
The mobile-side control unit 230 includes, for example, a signal strength measurement unit 231, a signal determination unit 232, a signal generation unit 233, and a reception control unit 234. The signal strength measuring unit 231 measures the signal strength of the request signal received by the mobile-side receiving unit 210. When the mobile-side receiving unit 210 has sensitivity characteristics with a plurality of different directions as axes, the signal strength measuring unit 231 may measure the signal strength detected for each of the plurality of axes for each axis. .
信号判定部232は、信号強度測定部231による測定結果に基づいて、携帯側受信部210によって受信されたリクエスト信号を判定する。信号生成部233は、携帯側受信部210によって受信されたリクエスト信号に応じたアンサー信号を生成し、携帯側送信部220に送信させる。受信制御部234は、携帯側受信部210が受信した結果に基づいて、車載装置100によって送信されるリクエスト信号を受信可能に制御する。なお、携帯側受信部210が、互いに異なる複数の方向を軸にした感度特性を有する場合、信号判定部232は、信号強度測定部231により、当該複数の軸ごとに検出された信号の測定結果を整理して、整理した後の測定結果の値を判定するようにしてもよい。
The signal determination unit 232 determines the request signal received by the portable side reception unit 210 based on the measurement result by the signal strength measurement unit 231. The signal generation unit 233 generates an answer signal corresponding to the request signal received by the mobile-side receiver 210 and causes the mobile-side transmitter 220 to transmit the answer signal. The reception control unit 234 controls the request signal transmitted by the in-vehicle device 100 to be receivable based on the result received by the mobile-side receiving unit 210. When the mobile-side receiving unit 210 has sensitivity characteristics with a plurality of different directions as axes, the signal determination unit 232 uses the signal strength measurement unit 231 to measure the signals detected for each of the plurality of axes. May be arranged, and the value of the measurement result after the arrangement may be determined.
なお、携帯側受信部210と、携帯側送信部220と、携帯側制御部230とのうち一部または全部は、CPU等のプロセッサがプログラムを実行することにより機能するソフトウェア機能部としてもよい。また、これらのうち一部または全部は、LSIやASIC等のハードウェア機能部であってもよい。また、携帯側制御部230が記憶部(不図示)を備えていてもよく、同記憶部がROMやRAM、HDD、フラッシュメモリ等で実現されてもよい。プロセッサが実行するプログラムは、予め上記記憶部に格納されていてもよいし、外部装置からダウンロードされてもよい。また、プログラムを格納した可搬型記憶媒体が図示しないドライブ装置に装着されることで上記記憶部にインストールされてもよい。
Note that some or all of the mobile-side receiving unit 210, the mobile-side transmitting unit 220, and the mobile-side control unit 230 may be software function units that function when a processor such as a CPU executes a program. Further, some or all of these may be hardware function units such as an LSI or an ASIC. Further, the portable control unit 230 may include a storage unit (not shown), and the storage unit may be realized by a ROM, a RAM, an HDD, a flash memory, or the like. The program executed by the processor may be stored in the storage unit in advance or may be downloaded from an external device. Further, the portable storage medium storing the program may be installed in the storage unit by being mounted on a drive device (not shown).
図2は、車載側送信部40の構成の一例を示す図である。車載側送信部40は、例えば、駆動部41と共振部42を備える。
駆動部41は、車載側制御部30から供給される信号の電力を増幅して共振部42を駆動する。共振部42は、送信用アンテナ43とコンデンサ44とを備える。送信用アンテナ43は、コイルを含み、例えば、コンデンサ44とともにLC型の共振回路を形成する。同図に例示する共振部42は、直列共振回路として構成したものである。なお、共振部42の共振周波数をf0で示す。送信用アンテナ43は、共振部42の共振により生成される電波を、大気中に放射する。 FIG. 2 is a diagram illustrating an example of the configuration of the in-vehicleside transmission unit 40. The vehicle-mounted side transmission part 40 is provided with the drive part 41 and the resonance part 42, for example.
Thedrive unit 41 amplifies the power of the signal supplied from the in-vehicle side control unit 30 and drives the resonance unit 42. The resonating unit 42 includes a transmitting antenna 43 and a capacitor 44. The transmitting antenna 43 includes a coil and forms, for example, an LC type resonance circuit together with the capacitor 44. The resonance part 42 illustrated in the figure is configured as a series resonance circuit. The resonance frequency of the resonance unit 42 is indicated by f0. The transmitting antenna 43 radiates radio waves generated by the resonance of the resonance unit 42 into the atmosphere.
駆動部41は、車載側制御部30から供給される信号の電力を増幅して共振部42を駆動する。共振部42は、送信用アンテナ43とコンデンサ44とを備える。送信用アンテナ43は、コイルを含み、例えば、コンデンサ44とともにLC型の共振回路を形成する。同図に例示する共振部42は、直列共振回路として構成したものである。なお、共振部42の共振周波数をf0で示す。送信用アンテナ43は、共振部42の共振により生成される電波を、大気中に放射する。 FIG. 2 is a diagram illustrating an example of the configuration of the in-vehicle
The
上記のように構成した車載側送信部40は、共振周波数f0を中心周波数とするバンドパスフィルタとして機能する。例えば、車載側制御部30から車載側送信部40に供給される信号は、共振周波数f0近傍の所定の周波数fのディジタル信号であってもよく、その波形が矩形のパルス信号列として構成されていてもよい。共振部42は、共振周波数f0を中心周波数とする所望の帯域以外の成分を減衰させるとともに、信号の通過帯域においても共振周波数f0の減衰率が最も小さく、共振周波数f0から周波数が離れるにつれて減衰率が大きくなる周波数特性を有している。なお、所望の帯域以外の帯域の周波数成分には、共振周波数f0を基本周波数とする高調波成分などが含まれており、所望の帯域以外の帯域の周波数成分が、車載側送信部40の周波数特性等により減衰される。
The vehicle-side transmitter 40 configured as described above functions as a bandpass filter having the resonance frequency f0 as the center frequency. For example, the signal supplied from the in-vehicle side control unit 30 to the in-vehicle side transmission unit 40 may be a digital signal having a predetermined frequency f near the resonance frequency f0, and the waveform is configured as a rectangular pulse signal sequence. May be. The resonance unit 42 attenuates components other than the desired band having the resonance frequency f0 as the center frequency, and also has the smallest attenuation rate at the resonance frequency f0 in the signal pass band, and the attenuation rate as the frequency increases from the resonance frequency f0. Has a frequency characteristic that increases. Note that the frequency components in the band other than the desired band include harmonic components having the resonance frequency f0 as the fundamental frequency, and the frequency component in the band other than the desired band is the frequency of the in-vehicle transmission unit 40. It is attenuated due to characteristics.
車載側制御部30は、例えば、ASK(amplitude-shift keying)やPSK(phase-shift keying)等の変調方式の信号を生成するための信号DMODを生成し、信号DMODを車載側送信部40に供給する。信号DMODは、周波数fのパルス信号列を含む。例えば、通信制御部32は、信号DMODの周波数fより十分に高い周波数のクロック信号に対する分周比を制御して、所望の周波数になるように信号DMODの周波数fを調整して、認証用信号を生成する。認証用信号を生成するための信号DMODの周波数fの制御方法については後述する。
The in-vehicle side control unit 30 generates a signal DMOD for generating a signal of a modulation scheme such as ASK (amplitude-shift keying) or PSK (phase-shift keying), and sends the signal DMOD to the in-vehicle side transmission unit 40. Supply. The signal DMOD includes a pulse signal train having a frequency f. For example, the communication control unit 32 controls the frequency division ratio with respect to a clock signal having a frequency sufficiently higher than the frequency f of the signal DMOD, adjusts the frequency f of the signal DMOD so as to be a desired frequency, and performs an authentication signal. Is generated. A method for controlling the frequency f of the signal DMOD for generating the authentication signal will be described later.
図3は、携帯側受信部210の構成の一例を示す図である。携帯側受信部210は、例えば、受信用アンテナ211と、受信回路部212と、局部発振部213と、ミキサー214と、復調部215とを備える。
FIG. 3 is a diagram illustrating an example of the configuration of the mobile-side receiving unit 210. The mobile-side receiving unit 210 includes, for example, a receiving antenna 211, a receiving circuit unit 212, a local oscillating unit 213, a mixer 214, and a demodulating unit 215.
受信回路部212は、受信用アンテナ211によって受信された信号の増幅や、ノイズ除去、オフセット調整、フィルタリング処理等を行って、ミキサー214に出力する。例えば、受信回路部212は、オフセット測定部216と、可変利得増幅部(以下、VGAという。)217とを備える。VGA217は、制御に応じた利得で信号を増幅する。VGA217が増幅する信号は、例えば、受信用アンテナ211によって受信された信号から生成された信号であって、オフセット測定部216により信号のオフセットが測定された信号としてもよい。VGA217は、受信用アンテナ211によって受信された信号から生成された信号を所望の利得で増幅して、ミキサー214に供給する電力レベルに調整する。オフセット測定部216は、VGA217が所望の利得で増幅する信号のオフセットを測定する。
The reception circuit unit 212 performs amplification of the signal received by the reception antenna 211, noise removal, offset adjustment, filtering processing, and the like, and outputs the result to the mixer 214. For example, the reception circuit unit 212 includes an offset measurement unit 216 and a variable gain amplification unit (hereinafter referred to as VGA) 217. The VGA 217 amplifies the signal with a gain according to the control. The signal amplified by the VGA 217 may be, for example, a signal generated from a signal received by the receiving antenna 211 and a signal whose offset is measured by the offset measuring unit 216. The VGA 217 amplifies the signal generated from the signal received by the receiving antenna 211 with a desired gain, and adjusts the power level to be supplied to the mixer 214. The offset measurement unit 216 measures the offset of the signal that the VGA 217 amplifies with a desired gain.
ミキサー214は、受信回路部212によって出力された信号の周波数を、局部発振部213によって出力された信号に基づいて変換する。例えば、ミキサー214は、受信回路部212によって出力された信号の周波数と局部発振部213によって出力された信号の周波数との差から生じたビート信号を復調部215に出力する。
The mixer 214 converts the frequency of the signal output from the reception circuit unit 212 based on the signal output from the local oscillation unit 213. For example, the mixer 214 outputs a beat signal generated from the difference between the frequency of the signal output from the reception circuit unit 212 and the frequency of the signal output from the local oscillation unit 213 to the demodulation unit 215.
復調部215は、ミキサー214によって出力された信号を、上述した車載側送信部40の変調方式に対する復調を行い、復調した信号を携帯側制御部230に出力する。
The demodulator 215 demodulates the signal output from the mixer 214 with respect to the modulation scheme of the vehicle-mounted transmitter 40 described above, and outputs the demodulated signal to the portable controller 230.
(リクエスト信号のフレーム構造)
図4を参照して、本実施形態のLF通信にて送信するリクエスト信号のフレーム構造について説明する。図4は、本実施形態のLF通信にて送信するリクエスト信号のフレーム構造を示す説明図である。以下、リクエスト信号のフレーム構造をパターンLFPと称して説明する。 (Request signal frame structure)
With reference to FIG. 4, the frame structure of the request signal transmitted by LF communication of this embodiment is demonstrated. FIG. 4 is an explanatory diagram showing a frame structure of a request signal transmitted by LF communication according to the present embodiment. Hereinafter, the frame structure of the request signal will be described as a pattern LFP.
図4を参照して、本実施形態のLF通信にて送信するリクエスト信号のフレーム構造について説明する。図4は、本実施形態のLF通信にて送信するリクエスト信号のフレーム構造を示す説明図である。以下、リクエスト信号のフレーム構造をパターンLFPと称して説明する。 (Request signal frame structure)
With reference to FIG. 4, the frame structure of the request signal transmitted by LF communication of this embodiment is demonstrated. FIG. 4 is an explanatory diagram showing a frame structure of a request signal transmitted by LF communication according to the present embodiment. Hereinafter, the frame structure of the request signal will be described as a pattern LFP.
パターンLFPのフレーム伝送に要する時間をTLFPとして示す。図4に示すように、例えば、パターンLFPは、携帯端末装置用情報と、認証用情報とを含む。携帯端末装置用情報は、少なくともトレーニングデータTDと、同期パターンSYNC1と、識別情報IDkとを含み、認証用情報は、第1の認証用情報AUD1と、第2の認証用情報AUD2と、第3の認証用情報AUD3を含む。さらに、携帯端末装置用情報は、誤り訂正情報ECC1などのデータを含めてもよい。
The time required for frame transmission of the pattern LFP is indicated as TLFP. As shown in FIG. 4, for example, the pattern LFP includes mobile terminal device information and authentication information. The mobile terminal device information includes at least training data TD, a synchronization pattern SYNC1, and identification information IDk. The authentication information includes first authentication information AUD1, second authentication information AUD2, and third information. Authentication information AUD3. Further, the mobile terminal device information may include data such as error correction information ECC1.
トレーニングデータTDは、パターンLFPを送信する際に最初に送信されるように配置されている。トレーニングデータTDには、携帯端末装置200がパターンLFPを受信する際に携帯側受信部210の調整に要する信号パターンが割り付けられる。なお、トレーニングデータTDのことを、プリアンブルということがある。
The training data TD is arranged so as to be transmitted first when the pattern LFP is transmitted. The training data TD is assigned a signal pattern required for adjustment of the mobile-side receiving unit 210 when the mobile terminal device 200 receives the pattern LFP. The training data TD is sometimes referred to as a preamble.
同期パターンSYNC1は、例えばトレーニングデータTDの次に送信するように配置されている。同期パターンSYNC1には、携帯側受信部210がトレーニングデータTDによるトレーニングを終えた後に、各種情報を抽出する際に指標とする信号パターンと、パターン種別を識別する情報が含まれる。
The synchronization pattern SYNC1 is arranged to be transmitted next to the training data TD, for example. The synchronization pattern SYNC1 includes a signal pattern used as an index for extracting various types of information after the mobile-side receiving unit 210 finishes training with the training data TD, and information for identifying the pattern type.
識別情報IDkは、パターンLFPの送信先(宛先)にあたる携帯端末装置を特定する識別情報である。
The identification information IDk is identification information that identifies the mobile terminal device corresponding to the transmission destination (destination) of the pattern LFP.
誤り訂正情報ECC1は、パターンLFPにおいて、受信した識別情報IDkなどの各データの誤り検出や誤り訂正を行うための情報である。誤り訂正情報ECC1は、パターンの種類ごとに、誤り検出や誤り訂正の対象範囲、及び、誤り検出や誤り訂正の手法などを適宜定めることができる。
The error correction information ECC1 is information for performing error detection and error correction of each data such as the received identification information IDk in the pattern LFP. The error correction information ECC1 can appropriately determine an error detection and error correction target range, an error detection and error correction method, and the like for each pattern type.
パターンLFPに含まれる第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3は、例えば、認証処理に必要とされる情報(暗号鍵、暗号文など)を示す。認証処理の方法には、一般的なアルゴリズムを適用することができる。認証処理は、車載装置100において暗号化された情報を、携帯端末装置200により復号化してされ、復号化した情報の判定を携帯端末装置200と車載装置100の何れかで実施するようにしてもよい。以下の実施形態では、第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3の各部の信号の振幅に認証処理に必要とされる情報を付与した場合を例示する。
The first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 included in the pattern LFP indicate, for example, information (encryption key, ciphertext, etc.) required for the authentication process. . A general algorithm can be applied to the authentication processing method. In the authentication process, the information encrypted in the in-vehicle device 100 is decrypted by the mobile terminal device 200, and the decrypted information is determined by either the mobile terminal device 200 or the in-vehicle device 100. Good. In the following embodiment, a case where information necessary for authentication processing is added to the amplitude of the signal of each part of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 is illustrated. To do.
(車載側制御部30の処理)
以下、図5を参照して、本実施形態の車載側制御部30の処理について説明する。図5は、車載側制御部30の処理の流れの一例を示すフローチャートである。本フローチャートの処理は、メインスイッチ11がオフ状態、すなわち、ハンドルHがロック状態(車両の走行が不可能な状態)で実施されるものとする。 (Processing of the in-vehicle side control unit 30)
Hereinafter, with reference to FIG. 5, the process of the vehicle-mountedside control part 30 of this embodiment is demonstrated. FIG. 5 is a flowchart illustrating an example of a process flow of the in-vehicle side control unit 30. The processing in this flowchart is performed when the main switch 11 is in an off state, that is, when the handle H is in a locked state (a state where the vehicle cannot travel).
以下、図5を参照して、本実施形態の車載側制御部30の処理について説明する。図5は、車載側制御部30の処理の流れの一例を示すフローチャートである。本フローチャートの処理は、メインスイッチ11がオフ状態、すなわち、ハンドルHがロック状態(車両の走行が不可能な状態)で実施されるものとする。 (Processing of the in-vehicle side control unit 30)
Hereinafter, with reference to FIG. 5, the process of the vehicle-mounted
まず、判定部33は、入力回路部62から入力される信号に基づいて、起動スイッチ17の動作状態を判定する(ステップS100)。起動スイッチ17がオフ状態である場合、車載側制御部30は、本フローチャートの処理を終了する。
First, the determination unit 33 determines the operating state of the activation switch 17 based on the signal input from the input circuit unit 62 (step S100). When the start switch 17 is in the OFF state, the vehicle-mounted side control unit 30 ends the process of this flowchart.
一方、通信制御部32は、起動スイッチ17がオン状態である場合、送信パターン情報テーブル(図6)を参照して、リクエスト信号の送信パターンを設定する(ステップS102)。
On the other hand, when the activation switch 17 is on, the communication control unit 32 refers to the transmission pattern information table (FIG. 6) and sets the transmission pattern of the request signal (step S102).
送信パターンを定める情報には、認証用情報を送出する周波数、認証用情報を送出する時間などの情報が含まれる。
The information that defines the transmission pattern includes information such as the frequency at which authentication information is transmitted and the time at which authentication information is transmitted.
例えば、認証用情報を送出する周波数fとして、第1の認証用情報AUD1を送出する際の周波数f1と、第2の認証用情報AUD2を送出する際の周波数f2と、第3の認証用情報AUD3を送出する際の周波数f3とを、規定する。通信制御部32は、周波数f1と周波数f2と周波数f3とを、上述した送信用アンテナ45の利得(信号強度)に対する周波数の特性(以下、「共振特性」と称する)に基づいて、それぞれ設定する。周波数f1は、例えば、上述した送信用アンテナ45の共振周波数f0に対して周波数f2よりも近い値に設定される。周波数f3は、例えば、上述した送信用アンテナ45の共振周波数f0に対して周波数f2よりも遠い値に設定される。上記のように周波数f1と周波数f2と周波数f3を並べて配置することにより、上記の各周波数の周波数成分に同じ電力を送信用アンテナ45に供給した場合、それぞれの周波数の電波として送信される送信電力は、周波数f1がもっとも高くなり、続いて周波数f2、周波数f3の順に低くなる。
For example, as the frequency f for transmitting the authentication information, the frequency f1 for transmitting the first authentication information AUD1, the frequency f2 for transmitting the second authentication information AUD2, and the third authentication information The frequency f3 for sending AUD3 is defined. The communication control unit 32 sets the frequency f1, the frequency f2, and the frequency f3 based on the frequency characteristics (hereinafter referred to as “resonance characteristics”) with respect to the gain (signal strength) of the transmitting antenna 45 described above. . For example, the frequency f1 is set to a value closer to the resonance frequency f0 of the transmitting antenna 45 than the frequency f2. For example, the frequency f3 is set to a value farther than the frequency f2 with respect to the resonance frequency f0 of the transmission antenna 45 described above. When the same power is supplied to the transmission antenna 45 by arranging the frequency f1, the frequency f2, and the frequency f3 side by side as described above, the transmission power transmitted as radio waves of the respective frequencies The frequency f1 is the highest, followed by the frequency f2 and the frequency f3 in that order.
通信制御部32は、各認証用情報を送出する際の周波数を調整することによってリクエスト信号の信号強度を簡易に変更することができ、第1の認証用情報AUD1が送出される際の電波の信号強度と、第2の認証用情報AUD2が送出される際の電波の信号強度と、第3の認証用情報AUD3が送出される際の電波の信号強度とを異なるようにしてリクエスト信号を送信することができる。
The communication control unit 32 can easily change the signal strength of the request signal by adjusting the frequency at the time of sending each piece of authentication information, and the radio wave when the first authentication information AUD1 is sent. The request signal is transmitted by making the signal strength different from the signal strength of the radio wave when the second authentication information AUD2 is sent and the signal strength of the radio wave when the third authentication information AUD3 is sent. can do.
次に、通信制御部32は、リクエスト信号を送信する(ステップS104)リクエスト信号。通信制御部32は、例えば、予め定められた複数の送信パターンの何れかに従って、上記のリクエスト信号リクエスト信号を送信する。
Next, the communication control unit 32 transmits a request signal (Step S104). For example, the communication control unit 32 transmits the request signal request signal according to any of a plurality of predetermined transmission patterns.
例えば、通信制御部32は、第1の認証用情報AUD1を送出する時間TAUD1と、第2の認証用情報AUD2を送出する時間TAUD2と、第3の認証用情報AUD3を送出する時間TAUD3とを規定する送信パターンを予め定めて、記憶部35に記憶させておく。図6は、送信パターンを記憶する送信パターン情報テーブルの一例を示す図である。送信パターン情報テーブルは、第1の認証用情報AUD1を送出する時間TAUD1と、第2の認証用情報AUD2を送出する時間TAUD2と、第3の認証用情報AUD3を送出する時間TAUD3とを送出する時間(ミリ秒)を記憶する。通信制御部32は、例えば、送信パターン情報テーブルから送信パターンを選択する際に、乱数などを用いて、上記の送信パターンを不規則に決定する。この際、時間TAUD1と時間TAUD2と時間TAUD3のそれぞれの値は一致していてもよいし、相違していてもよい。これによって、通信制御部32は、時間TAUD1と時間TAUD2と時間TAUD3とに関する情報の秘匿性を向上させることができる。
For example, the communication control unit 32 sets a time TAUD1 for sending the first authentication information AUD1, a time TAUD2 for sending the second authentication information AUD2, and a time TAUD3 for sending the third authentication information AUD3. A prescribed transmission pattern is determined in advance and stored in the storage unit 35. FIG. 6 is a diagram illustrating an example of a transmission pattern information table that stores transmission patterns. The transmission pattern information table transmits a time TAUD1 for sending the first authentication information AUD1, a time TAUD2 for sending the second authentication information AUD2, and a time TAUD3 for sending the third authentication information AUD3. Remember time (milliseconds). For example, when the transmission control unit 32 selects a transmission pattern from the transmission pattern information table, the communication control unit 32 randomly determines the transmission pattern using a random number or the like. At this time, the values of the time TAUD1, the time TAUD2, and the time TAUD3 may be the same or different. Accordingly, the communication control unit 32 can improve the confidentiality of information regarding the time TAUD1, the time TAUD2, and the time TAUD3.
通信制御部32は、決定した時間TAUD1と時間TAUD2と時間TAUD3とに関する情報を記憶部35に記憶させておき、再度、時間TAUD1と時間TAUD2と時間TAUD3を設定した際は、例えば、前回記憶させた情報の上に今回設定した時間TAUD1と時間TAUD2と時間TAUD3の情報を上書きする。すなわち、通信制御部32は、時間TAUD1と時間TAUD2と時間TAUD3を設定する度に、記憶部35内の時間TAUD1と時間TAUD2と時間TAUD3の情報を更新する。
The communication control unit 32 stores information on the determined time TAUD1, time TAUD2, and time TAUD3 in the storage unit 35. When the time TAUD1, time TAUD2, and time TAUD3 are set again, for example, the communication control unit 32 stores the information last time. The information of the time TAUD1, time TAUD2, and time TAUD3 set this time is overwritten on the information. That is, the communication control unit 32 updates the information on the time TAUD1, the time TAUD2, and the time TAUD3 in the storage unit 35 every time the time TAUD1, the time TAUD2, and the time TAUD3 are set.
さらに、通信制御部32は、例えば、図4に示すようなフレーム構造のリクエスト信号を携帯端末装置200に送信する。通信制御部32は、出力する信号の周波数を、所定の周波数に設定して、車載側送信部40に携帯端末装置用情報を送信させる。
Further, the communication control unit 32 transmits a request signal having a frame structure as shown in FIG. 4 to the mobile terminal device 200, for example. The communication control unit 32 sets the frequency of the signal to be output to a predetermined frequency, and causes the in-vehicle side transmission unit 40 to transmit the mobile terminal device information.
また、通信制御部32は、出力する信号の周波数を、周波数f1に設定して、車載側送信部40に時間TAUD1をかけて第1の認証用情報AUD1を送信させる。
また、通信制御部32は、出力する信号の周波数を、周波数f2に設定して、車載側送信部40に時間TAUD2をかけて第2の認証用情報AUD2を送信させる。
また、通信制御部32は、出力する信号の周波数を、周波数f3に設定して、車載側送信部40に時間TAUD3をかけて第3の認証用情報AUD3を送信させる。 Further, thecommunication control unit 32 sets the frequency of the signal to be output to the frequency f1, and causes the in-vehicle side transmission unit 40 to transmit the first authentication information AUD1 over the time TAUD1.
In addition, thecommunication control unit 32 sets the frequency of the signal to be output to the frequency f2, and causes the in-vehicle side transmission unit 40 to transmit the second authentication information AUD2 over time TAUD2.
Further, thecommunication control unit 32 sets the frequency of the signal to be output to the frequency f3, and causes the in-vehicle side transmission unit 40 to transmit the third authentication information AUD3 over the time TAUD3.
また、通信制御部32は、出力する信号の周波数を、周波数f2に設定して、車載側送信部40に時間TAUD2をかけて第2の認証用情報AUD2を送信させる。
また、通信制御部32は、出力する信号の周波数を、周波数f3に設定して、車載側送信部40に時間TAUD3をかけて第3の認証用情報AUD3を送信させる。 Further, the
In addition, the
Further, the
通信制御部32は、このようにして設定した送信周波数(周波数f1、f2、f3)と送信時間(時間TAUD1、TAUD2、TAUD3)とに基づいて、リクエスト信号を携帯端末装置200に送信する。
The communication control unit 32 transmits a request signal to the mobile terminal device 200 based on the transmission frequency (frequency f1, f2, f3) and the transmission time (time TAUD1, TAUD2, TAUD3) set in this way.
次に、判定部33は、車載側受信部50によってアンサー信号が受信されたか否かを判定する(ステップS108)。車載側受信部50によってアンサー信号が受信されない場合、車載側制御部30は、アンサー信号が受信されるまで待機する。
Next, the determination unit 33 determines whether or not the answer signal is received by the in-vehicle side reception unit 50 (step S108). When the answer signal is not received by the in-vehicle side receiving unit 50, the in-vehicle side control unit 30 stands by until the answer signal is received.
一方、判定部33は、車載側受信部50によってアンサー信号が受信された場合には、車載側受信部50によって受信されたアンサー信号に含まれる情報であって、認証用情報を受信した結果を示す情報から、差分信号の検出回数(差分信号検出回数)が0回であったか否かを判定する(ステップS110)。上記の場合の差分信号とは、第1の認証用情報AUD1に対する第2の認証用情報AUD2または第3の認証用情報AUD3のことであり、第1の認証用情報AUD1の受信信号強度(信号の強度値)に比べて受信信号強度(信号の強度値)が所定量以下の信号であって、更に受信信号強度(信号の強度値)が小さな無効信号として扱うものを除いた信号のことである。
On the other hand, when the answer signal is received by the in-vehicle side receiving unit 50, the determination unit 33 is information included in the answer signal received by the in-vehicle side receiving unit 50, and shows the result of receiving the authentication information. From the information shown, it is determined whether or not the number of differential signal detections (difference signal detection count) is zero (step S110). The difference signal in the above case is the second authentication information AUD2 or the third authentication information AUD3 with respect to the first authentication information AUD1, and the received signal strength (signal) of the first authentication information AUD1 This is a signal excluding signals whose received signal strength (signal strength value) is less than or equal to a predetermined amount compared to the intensity value) and which are treated as invalid signals whose received signal strength (signal strength value) is small. is there.
判定部33は、車載側受信部50によって受信された信号の情報に基づいて、判定条件を満たすか否かを判定する(ステップS112)。判定条件とは、例えば、車載側受信部50の通信相手である携帯端末装置200を正規の装置であるか否かの判定、また、携帯端末装置200から受信したアンサー信号から、携帯端末装置200が受信した信号が正規のリクエスト信号であるか否かの判定の基準にする条件のことである。判定部33は、例えば、その判定条件を満たす場合に、携帯端末装置200が受信した信号が正規のリクエスト信号であり、さらに、アンサー信号を送付した携帯端末装置200を正規の装置であると判定し、携帯端末装置200の認証に成功したと判定する。上記の判定条件の一例として、「無効信号として検出された回数が0回である場合」、または、「第1の認証用情報AUD1を送出した時間に対して定めた回数と、第1の認証用情報AUD1の受信信号強度とが同等の強度にあると判定された回数が一致する場合」などが挙げられる。
The determination unit 33 determines whether or not the determination condition is satisfied based on the information of the signal received by the in-vehicle side reception unit 50 (step S112). The determination condition is, for example, whether or not the mobile terminal device 200 that is the communication partner of the in-vehicle side receiving unit 50 is a legitimate device, and from the answer signal received from the mobile terminal device 200, the mobile terminal device 200. Is a condition used as a criterion for determining whether or not the received signal is a regular request signal. For example, when the determination condition is satisfied, the determination unit 33 determines that the signal received by the mobile terminal device 200 is a normal request signal and that the mobile terminal device 200 that has sent the answer signal is a normal device. Then, it is determined that the mobile terminal device 200 has been successfully authenticated. As an example of the determination condition, “when the number of detected invalid signals is zero” or “the number of times determined with respect to the time at which the first authentication information AUD1 was sent, and the first authentication” The case where the number of times that the received signal strength of the usage information AUD1 is determined to be equal to the received signal strength coincides.
判定部33は、上記の判定条件を満たす場合、車載側受信部50によって受信された信号が、リクエスト信号の送信先である携帯端末装置200により送信されたアンサー信号であると判定する。この判定に併せて、アンサー信号に含まれる携帯機ID情報が一致したか、RSSI強度(第1の認証用情報AUD1の受信強度)が所定閾値以上であるか、および暗号用データの復号による暗号用データが一致したか等のそれぞれの状況が検出できた場合、判定部33は、車載側受信部50の通信相手である携帯端末装置200を正規の装置であると判定し、その認証に成功したと判定する(ステップS114)。
The determination unit 33 determines that the signal received by the in-vehicle side reception unit 50 is the answer signal transmitted by the mobile terminal device 200 that is the transmission destination of the request signal when the above determination condition is satisfied. In conjunction with this determination, whether the portable device ID information included in the answer signal matches, whether the RSSI strength (reception strength of the first authentication information AUD1) is equal to or greater than a predetermined threshold, and encryption by decrypting the encryption data When the respective statuses such as whether the data for use match can be detected, the determination unit 33 determines that the mobile terminal device 200 that is the communication counterpart of the in-vehicle side reception unit 50 is a legitimate device and succeeds in the authentication. It is determined that it has been performed (step S114).
一方、判定部33は、差分信号の検出回数(差分信号検出回数)が1回以上あった場合、または、上記の判定条件を満たさない場合に、車載側受信部50によって受信された信号が、リクエスト信号の送信先である携帯端末装置200により送信されたアンサー信号でないと判定する。判定部33は、車載側受信部50の通信相手である装置を正規の装置でないと判定し、認証に失敗したと判定する。つまり、本実施の形態の携帯端末装置認証システムでは、仮に、判定部33において、上記の携帯機ID情報の一致等の確認がなされたとしても(中継器を使用したリレーアタックにより正規携帯機との通信がなされたとしても)、認証用情報の送信時間と受信時間の一致がなければ、車載側受信部50の通信相手である装置を正規の装置でないと判定する(ステップS116)。
On the other hand, if the determination unit 33 has a difference signal detection count (difference signal detection count) of 1 or more, or if the determination condition is not satisfied, the signal received by the in-vehicle side reception unit 50 is: It is determined that the answer signal is not transmitted by the mobile terminal device 200 that is the transmission destination of the request signal. The determination unit 33 determines that the device that is the communication partner of the in-vehicle side reception unit 50 is not a regular device, and determines that the authentication has failed. That is, in the mobile terminal device authentication system of the present embodiment, even if the determination unit 33 confirms that the mobile device ID information matches or the like (with a relay attack using a relay device, If there is no match between the transmission time and the reception time of the authentication information, it is determined that the device that is the communication partner of the in-vehicle side receiving unit 50 is not a regular device (step S116).
ステップS114の処理の後、車載側制御部30(駆動制御部34)は、各部の駆動部(ソレノイド)を駆動させて各部の施錠状態を解錠するように制御する(ステップS118)。これによって本フローチャートの処理が終了する。
After the process of step S114, the vehicle-mounted side control unit 30 (drive control unit 34) controls the drive unit (solenoid) of each unit to be driven to unlock the locked state of each unit (step S118). Thereby, the processing of this flowchart is completed.
(携帯側制御部230の処理)
以下、図7から図11を参照して、本実施形態の携帯側制御部230の処理について説明する。 (Processing of portable side control unit 230)
Hereinafter, with reference to FIG. 7 to FIG. 11, the processing of theportable control unit 230 of the present embodiment will be described.
以下、図7から図11を参照して、本実施形態の携帯側制御部230の処理について説明する。 (Processing of portable side control unit 230)
Hereinafter, with reference to FIG. 7 to FIG. 11, the processing of the
図7は、携帯側制御部230の処理の流れの一例を示すフローチャートである。
まず、携帯側制御部230は、リクエスト信号の受信処理を実施する。このリクエスト信号の受信処理では、携帯端末装置200の携帯側受信部210の受信感度特性を最適化する。リクエスト信号の受信処理として、例えば、携帯側制御部230は、携帯側受信部210によってリクエスト信号の受信が開始されたか否かを判定する(ステップS205)。携帯側受信部210によってリクエスト信号の受信が開始されない場合、本フローチャートの処理を終了する。 FIG. 7 is a flowchart illustrating an example of a process flow of the mobile-side control unit 230.
First, the mobile-side control unit 230 performs a request signal reception process. In the request signal reception process, the reception sensitivity characteristic of the mobile-side receiving unit 210 of the mobile terminal device 200 is optimized. As the request signal reception process, for example, the mobile-side control unit 230 determines whether or not the mobile-side reception unit 210 has started receiving a request signal (step S205). If reception of the request signal is not started by the mobile-side receiving unit 210, the process of this flowchart is terminated.
まず、携帯側制御部230は、リクエスト信号の受信処理を実施する。このリクエスト信号の受信処理では、携帯端末装置200の携帯側受信部210の受信感度特性を最適化する。リクエスト信号の受信処理として、例えば、携帯側制御部230は、携帯側受信部210によってリクエスト信号の受信が開始されたか否かを判定する(ステップS205)。携帯側受信部210によってリクエスト信号の受信が開始されない場合、本フローチャートの処理を終了する。 FIG. 7 is a flowchart illustrating an example of a process flow of the mobile-
First, the mobile-
一方、信号判定部232は、携帯側受信部210によってリクエスト信号の受信が開始された場合、リクエスト信号のフレーム構造(パターンLFP)において第1の認証用情報AUD1の受信が開始されたか否か、すなわち、リクエスト信号のフレーム構造において携帯端末装置用情報(LFデータ)の期間が終了したか否かを判定する(ステップS210)。
On the other hand, the signal determination unit 232 determines whether reception of the first authentication information AUD1 is started in the frame structure (pattern LFP) of the request signal when reception of the request signal is started by the mobile-side receiving unit 210. That is, it is determined whether or not the period of the mobile terminal device information (LF data) has ended in the frame structure of the request signal (step S210).
例えば、信号判定部232は、リクエスト信号の受信開始時、すなわち、リクエスト信号のフレーム構造において、携帯端末装置用情報が開始されるのに応じて時間のカウントを開始し、携帯端末装置用情報の期間が満了したことにより、携帯端末装置用情報(LFデータ)の期間が終了したと判定する。
For example, the signal determination unit 232 starts counting the time when the reception of the request signal is started, that is, in the frame structure of the request signal, in response to the start of the information for the mobile terminal device. It is determined that the period of the mobile terminal device information (LF data) has ended due to the expiration of the period.
信号判定部232は、リクエスト信号のLFデータの期間が満了するまで待機する。一方、リクエスト信号のLFデータの期間が満了した後、携帯側制御部230は、信号測定処理を実施する。信号測定処理の詳細は後述する(ステップS220)。
The signal determination unit 232 waits until the LF data period of the request signal expires. On the other hand, after the LF data period of the request signal expires, the portable control unit 230 performs signal measurement processing. Details of the signal measurement process will be described later (step S220).
次に、信号生成部233は、所定のフレーム構造を有するアンサー信号を生成して、携帯側送信部220に送信させる(ステップS230)。これによって、本フローチャートの処理が終了する。
Next, the signal generation unit 233 generates an answer signal having a predetermined frame structure and causes the portable-side transmission unit 220 to transmit it (step S230). Thereby, the process of this flowchart is complete | finished.
図8は、ステップS220における携帯側制御部230の信号測定処理を説明する図である。同図には、信号測定処理の対象とする携帯端末装置200が受信したリクエスト信号が示されている。
リクエスト信号のうち、第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3が観測される時刻t0から時刻t7までの期間に実施される処理について説明する。携帯側制御部230は、時刻t0から時刻t7までの期間に複数回の測定を実施する。例えば、以下の説明では、同図に示すようにM1からM6の6回に分けて測定を実施する場合を例に挙げて説明する。各回の測定を実施する時刻は、時刻t0を基準に計時した時刻t1から時刻t6に実施する。時刻t1から時刻t6は、時刻t0から時刻t1までを時間T1に、時刻t1以降は周期T2で定める。 FIG. 8 is a diagram for explaining the signal measurement process of theportable control unit 230 in step S220. The figure shows a request signal received by the mobile terminal device 200 that is the target of the signal measurement process.
A description will be given of processing performed in a period from time t0 to time t7 when the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 are observed in the request signal. The mobile-side control unit 230 performs a plurality of measurements during a period from time t0 to time t7. For example, in the following description, as shown in the figure, a case where measurement is performed in six steps from M1 to M6 will be described as an example. The measurement is performed at each time from time t1 to time t6 measured with reference to time t0. From the time t1 to the time t6, the time from the time t0 to the time t1 is defined as the time T1, and the time after the time t1 is defined as the period T2.
リクエスト信号のうち、第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3が観測される時刻t0から時刻t7までの期間に実施される処理について説明する。携帯側制御部230は、時刻t0から時刻t7までの期間に複数回の測定を実施する。例えば、以下の説明では、同図に示すようにM1からM6の6回に分けて測定を実施する場合を例に挙げて説明する。各回の測定を実施する時刻は、時刻t0を基準に計時した時刻t1から時刻t6に実施する。時刻t1から時刻t6は、時刻t0から時刻t1までを時間T1に、時刻t1以降は周期T2で定める。 FIG. 8 is a diagram for explaining the signal measurement process of the
A description will be given of processing performed in a period from time t0 to time t7 when the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 are observed in the request signal. The mobile-
図8(a)に、模式化した信号波形を示す。第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3のそれぞれの振幅は、W1とW2とW3で観測される。第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3のそれぞれが規定の信号として受信されている場合は、W1>W2>W3の関係にある。
Fig. 8 (a) shows a schematic signal waveform. The amplitudes of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 are observed at W1, W2, and W3. When each of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3 is received as a prescribed signal, the relationship is W1> W2> W3.
図8(b)に、各回の測定で検出された振幅の検出値を示す。時刻t1における測定回M1と、時刻t2における測定回M2の検出値は、W1である。時刻t3における測定回M3と、時刻t4における測定回M4の検出値は、W2である。時刻t5における測定回M5と、時刻t6における測定回M6の検出値は、W3である。M1の検出値W1を基準にして、下記の式(1)に示す関係が成り立つように第1の閾値TH1と第2の閾値TH2とを定める。
Fig. 8 (b) shows the detected value of the amplitude detected in each measurement. The detected value of the measurement time M1 at time t1 and the measurement time M2 at time t2 is W1. The detected value of the measurement time M3 at time t3 and the measurement time M4 at time t4 is W2. The detected value of the measurement time M5 at time t5 and the measurement time M6 at time t6 is W3. Based on the detection value W1 of M1, the first threshold value TH1 and the second threshold value TH2 are determined so that the relationship represented by the following formula (1) is established.
TH1=(W1-d1)
TH2=(W1-d2)
W3<TH2<W2<TH1<W1 ・・・(1) TH1 = (W1-d1)
TH2 = (W1-d2)
W3 <TH2 <W2 <TH1 <W1 (1)
TH2=(W1-d2)
W3<TH2<W2<TH1<W1 ・・・(1) TH1 = (W1-d1)
TH2 = (W1-d2)
W3 <TH2 <W2 <TH1 <W1 (1)
上記の式(1)において、d1とd2は、定数として予め定められ、例えば、その値が図示されない携帯端末装置200の記憶部に格納されている。以下の説明において、d1を、検出値W1の信号(第1の信号)より振幅が小さな検出値W2の信号(第2の信号)を識別可能な差分閾値(第1閾値)と呼び、d2を、検出値W2より振幅が小さな検出値W3の信号(第3の信号)を識別可能な無効閾値(第2閾値)と呼ぶ。
In the above formula (1), d1 and d2 are predetermined as constants, and for example, the values are stored in the storage unit of the mobile terminal device 200 not shown. In the following description, d1 is referred to as a differential threshold (first threshold) that can identify a signal (second signal) having a detection value W2 having a smaller amplitude than the signal (first signal) having a detection value W1, and d2 is referred to as a difference threshold (first threshold). The signal of the detection value W3 (third signal) having an amplitude smaller than the detection value W2 is referred to as an identifiable invalid threshold (second threshold).
図9は、信号測定処理の流れの一例を示すフローチャートである。
FIG. 9 is a flowchart showing an example of the flow of signal measurement processing.
携帯側制御部230は、0から6までの値をとる測定回数カウンタを用いて、測定回数を計数する。携帯側制御部230は、1からN1までの値をとる通常信号検出回数カウンタを用いて、測定値が(TH1<W1)と検出された測定回数を計数する。携帯側制御部230は、0からN2までの値をとる差分信号検出回数カウンタを用いて、測定値が(TH2<W2<TH1)と検出された測定回数を計数する。携帯側制御部230は、0からN3までの値をとる無効信号検出回数カウンタを用いて、測定値が(W3<TH2)と検出された測定回数を計数する。上記の「通常信号検出回数カウンタ」と「差分信号検出回数カウンタ」と「無効信号検出回数カウンタ」は、変数として定義され、例えば、それらの値が、図示されない携帯端末装置200の記憶部の記憶領域に格納される。例えば、「測定回数カウンタ」と「通常信号検出回数カウンタ」と「差分信号検出回数カウンタ」と「無効信号検出回数カウンタ」のそれぞれは、初期化処理により、0と1と0と0とに設定される。
The portable-side control unit 230 counts the number of measurements using a measurement number counter that takes a value from 0 to 6. The portable-side control unit 230 counts the number of measurement times when the measured value is detected as (TH1 <W1) using a normal signal detection number counter that takes values from 1 to N1. The portable side control unit 230 counts the number of measurement times when the measured value is detected as (TH2 <W2 <TH1) using a differential signal detection number counter that takes values from 0 to N2. The portable-side control unit 230 counts the number of measurement times when the measured value is detected as (W3 <TH2) using an invalid signal detection number counter that takes values from 0 to N3. The “normal signal detection number counter”, “difference signal detection number counter”, and “invalid signal detection number counter” are defined as variables. For example, these values are stored in the storage unit of the mobile terminal device 200 (not shown). Stored in the area. For example, each of “measurement number counter”, “normal signal detection number counter”, “difference signal detection number counter”, and “invalid signal detection number counter” is set to 0, 1, 0, and 0 by initialization processing. Is done.
まず、携帯側制御部230は、測定回数カウンタの値に基づいて、今回の測定が1回目であるか否かを判定する。例えば、携帯側制御部230は、測定回数カウンタの値が1か否かを判定する(ステップS402)。
First, the mobile-side controller 230 determines whether or not the current measurement is the first time based on the value of the measurement counter. For example, the portable control unit 230 determines whether or not the value of the measurement number counter is 1 (step S402).
上記のステップS402の判定により、今回の測定が1回目であると判定された場合、後述する1回目の測定を実施する前に、受信制御部234は、オフセット測定部216により、リクエスト信号のフレーム構造(パターンLFP)において第1の認証用情報AUD1に対応する信号のオフセットを測定させる。なお、オフセットの測定値が予め定められた範囲に無い場合には、受信制御部234は、オフセット測定部216を制御して、オフセットの値が予め定められた所望の範囲に収まるように、オフセットを調整する。受信制御部234は、再度測定したオフセットの測定値が予め定められた範囲に入った段階でその調整を終え、調整を終えてから以下に示す一連の処理を終えるまでその調整値に固定にする。受信制御部234は、調整後のオフセットの測定値のデータを、図示しない記憶部に記憶させる(ステップS404)。
If it is determined by the determination in step S402 that the current measurement is the first measurement, the reception control unit 234 uses the offset measurement unit 216 to execute the request signal frame before performing the first measurement described later. In the structure (pattern LFP), the offset of the signal corresponding to the first authentication information AUD1 is measured. If the measured offset value is not within the predetermined range, the reception control unit 234 controls the offset measuring unit 216 so that the offset value falls within the predetermined desired range. Adjust. The reception control unit 234 finishes the adjustment when the measured offset value measured again falls within a predetermined range, and fixes the adjusted value until the following series of processing is finished after the adjustment is finished. . The reception control unit 234 stores the adjusted offset measurement value data in a storage unit (not shown) (step S404).
受信制御部234は、携帯側受信部210の受信感度特性を調整するために、各認証用情報を受信する際に適した測定レンジを決定する。例えば、携帯側受信部210は、VGA217を有しており、VGA217の増幅率を調整することにより、携帯側受信部210の増幅率を所望の増幅率に設定することができる。換言すれば、受信制御部234は、VGA217を制御してAGC(Automatic Gain Control)として機能させて、そのAGCの機能によりVGA217の出力信号レベルを最適化した増幅率を取得する。なお、最適化した結果の増幅率は、量子化された離散的な値をとる。その増幅率としては、増幅率が大きい方から順に、例えば、54dB(デシベル)、36dB、18dB、0dB、-18dBなどの値にする。受信制御部234は、VGA217の増幅率を上記の値に調整しつつ、VGA217の出力信号の信号レベルを測定し、測定された信号レベルが所望の範囲に収まるようにVGA217の増幅率を最適化する。なお、上記のとおり可変範囲が広範囲に渡る場合には、VGA217を複数の段階に分けて構成してもよい、複数の系統に対応させて切り換えるようにしてもよい。
上記のように、受信制御部234は、最適化した測定レンジに適した増幅率になるように、VGA217の増幅率を調整し、調整を終えてから以下に示す一連の処理を終えるまで、VGA217の増幅率を固定にして、携帯側受信部210の測定レンジを設定する(ステップS406)。 Thereception control unit 234 determines a measurement range suitable for receiving each piece of authentication information in order to adjust the reception sensitivity characteristic of the mobile-side reception unit 210. For example, the portable receiver 210 has a VGA 217, and the amplification factor of the portable receiver 210 can be set to a desired amplification factor by adjusting the amplification factor of the VGA 217. In other words, the reception control unit 234 controls the VGA 217 to function as an AGC (Automatic Gain Control), and obtains an amplification factor that optimizes the output signal level of the VGA 217 by the function of the AGC. Note that the amplification factor obtained as a result of the optimization takes a quantized discrete value. The amplification factors are set to values of 54 dB (decibel), 36 dB, 18 dB, 0 dB, −18 dB, etc. in order from the largest amplification factor. The reception control unit 234 measures the signal level of the output signal of the VGA 217 while adjusting the amplification factor of the VGA 217 to the above value, and optimizes the amplification factor of the VGA 217 so that the measured signal level is within a desired range. To do. In addition, when the variable range covers a wide range as described above, the VGA 217 may be divided into a plurality of stages, or may be switched corresponding to a plurality of systems.
As described above, thereception control unit 234 adjusts the amplification factor of the VGA 217 so that the amplification factor is suitable for the optimized measurement range. And the measurement range of the portable receiver 210 is set (step S406).
上記のように、受信制御部234は、最適化した測定レンジに適した増幅率になるように、VGA217の増幅率を調整し、調整を終えてから以下に示す一連の処理を終えるまで、VGA217の増幅率を固定にして、携帯側受信部210の測定レンジを設定する(ステップS406)。 The
As described above, the
信号強度測定部231は、認証用信号の強度値として、第1の認証用情報AUD1に対応する信号の受信信号強度を測定して受信信号強度値(RSSI1)を得る。なお、RSSI1は、以降の測定回において、当該測定回の判定処理の基準値として利用される(ステップS408)。例えば、RSSI1は、上述の図8のM1における測定値W1に対応する。
The signal strength measurement unit 231 obtains a received signal strength value (RSSI 1 ) by measuring the received signal strength of the signal corresponding to the first authentication information AUD1 as the strength value of the authentication signal. Note that RSSI 1 is used as a reference value for the determination process of the measurement time in the subsequent measurement times (step S408). For example, RSSI 1 corresponds to the measured value W1 at M1 in FIG.
受信制御部234は、通常信号検出回数カウンタの値に1を加算して、その加算後の値に更新して、更新後の値を通常信号検出回数カウンタに書き込み(ステップS410)、ステップS424の処理に進める。
The reception control unit 234 adds 1 to the value of the normal signal detection number counter, updates the value after the addition, writes the updated value in the normal signal detection number counter (step S410), and performs step S424. Proceed to processing.
ステップS402の判定において、測定回が2回目以上と判定された場合、信号強度測定部231は、認証用信号の強度値として、測定回に対応する認証用情報AUDに対応する信号の受信信号強度を測定して受信信号強度値(RSSIN)を得る(ステップS412)。
信号判定部232は、ステップS412において取得したRSSI1から定めた無効閾値d2に基づいて、検出した信号を無効信号と判定すべきか否かを判定する(ステップS414)。
ステップS414の判定において、検出した信号を無効信号と判定した場合には、受信制御部234は、無効信号検出回数のカウンタの値に1を加算して、その加算後の値に更新して、更新後の値を無効信号検出回数カウンタに書き込み(ステップS416)、ステップS424の処理に進める。 When it is determined in step S402 that the number of measurement times is the second time or more, the signalstrength measurement unit 231 uses the received signal strength of the signal corresponding to the authentication information AUD corresponding to the measurement time as the strength value of the authentication signal. Is measured to obtain a received signal strength value (RSSI N ) (step S412).
Thesignal determination unit 232 determines whether or not the detected signal should be determined as an invalid signal based on the invalid threshold d2 determined from RSSI 1 acquired in step S412 (step S414).
If it is determined in step S414 that the detected signal is an invalid signal, thereception control unit 234 adds 1 to the counter value of the invalid signal detection count, and updates the value after the addition, The updated value is written in the invalid signal detection number counter (step S416), and the process proceeds to step S424.
信号判定部232は、ステップS412において取得したRSSI1から定めた無効閾値d2に基づいて、検出した信号を無効信号と判定すべきか否かを判定する(ステップS414)。
ステップS414の判定において、検出した信号を無効信号と判定した場合には、受信制御部234は、無効信号検出回数のカウンタの値に1を加算して、その加算後の値に更新して、更新後の値を無効信号検出回数カウンタに書き込み(ステップS416)、ステップS424の処理に進める。 When it is determined in step S402 that the number of measurement times is the second time or more, the signal
The
If it is determined in step S414 that the detected signal is an invalid signal, the
一方、ステップS414の判定において、検出した信号を無効信号と判定しなかった場合には、受信制御部234は、信号判定部232により得た、1回目の測定回のステップS408において取得したRSSI1と、今回の測定回のステップS412において取得したRSSINとの差が、差分閾値以上か否かを判定する。例えば、受信制御部234は、ステップS412において取得したRSSI1から定めた差分閾値d1に基づいて、検出した信号を差分信号と判定すべきか否かを判定する(ステップS418)。
On the other hand, if the detected signal is not determined to be an invalid signal in the determination in step S414, the reception control unit 234 acquires the RSSI 1 acquired in step S408 of the first measurement time obtained by the signal determination unit 232. When the difference between the RSSI N obtained in step S412 of the current measurement count and determines whether or difference threshold value. For example, the reception control unit 234 determines whether or not the detected signal should be determined as a differential signal based on the difference threshold d1 determined from RSSI 1 acquired in step S412 (step S418).
ステップS418の判定において、RSSI1とRSSINとの差が、差分閾値以上であると判定した場合には、受信制御部234は、差分信号検出回数のカウンタの値に1を加算して、その加算後の値に更新して、更新後の値を差分信号検出回数カウンタに書き込み(ステップS420)、ステップS424の処理に進める。
In the determination of step S418, the difference between the RSSI 1 and RSSI N is, when it is determined to be equal to or greater than the difference threshold, the reception control unit 234 adds 1 to the value of the differential signal detection number counter, the The value after the addition is updated, the updated value is written in the difference signal detection number counter (step S420), and the process proceeds to step S424.
一方、ステップS418の判定において、RSSI1とRSSINとの差が、差分閾値以上でないと判定した場合には、受信制御部234は、通常信号検出回数に1を加算して、その加算後の値に更新して、更新後の値を通常信号検出回数カウンタに書き込み(ステップS422)、ステップS424の処理に進める。
On the other hand, in the judgment of step S418, the difference between the RSSI 1 and RSSI N is, when it is determined not more than the difference threshold, the reception control unit 234 adds 1 to the normal signal detection times, after the addition The value is updated, and the updated value is written in the normal signal detection number counter (step S422), and the process proceeds to step S424.
ステップS410、ステップS416、ステップS420、または、ステップS422の何れかの処理を終えた後、受信制御部234は、測定回数に1を加算して、その加算後の値に更新して、更新後の値を測定回数カウンタに書き込む(ステップS424)。
After completion of any of the processing of step S410, step S416, step S420, or step S422, the reception control unit 234 adds 1 to the number of measurements, updates the value after the addition, and after the update Is written in the measurement counter (step S424).
受信制御部234は、測定回数カウンタの値に基づいて、規定回数の測定が終了したか否かを判定する(ステップS426)。
The reception control unit 234 determines based on the value of the measurement number counter whether or not the specified number of measurements have been completed (step S426).
ステップS426の判定において、規定回数の測定が終了したと判定した場合には、リクエスト信号に対する測定を終了させる(ステップS428)。これによって、本フローチャートの処理が終了する。
If it is determined in step S426 that the specified number of measurements have been completed, the measurement for the request signal is terminated (step S428). Thereby, the process of this flowchart is complete | finished.
一方、ステップS426の判定において、規定回数の測定が終了していないと判定した場合には、リクエスト信号に対する測定を継続させる(ステップS430)。これによって、本フローチャートの処理が終了する。
On the other hand, if it is determined in step S426 that the specified number of measurements has not been completed, the measurement for the request signal is continued (step S430). Thereby, the process of this flowchart is complete | finished.
図10を参照して、携帯端末装置認証システム1の処理について説明する。同図は、携帯端末装置認証システム1の処理の流れの一例を示すタイミングチャートである。
With reference to FIG. 10, the process of the portable terminal device authentication system 1 will be described. FIG. 2 is a timing chart showing an example of the processing flow of the mobile terminal device authentication system 1.
同図には、(a)起動スイッチ、(b)制御部起動、(c)制御部初期化処理、(d)メインスイッチ、(e)メインスイッチ判定値、(f)LF送信、(g)携帯機処理、(h)RF受信、(i)RFデータ判定、(j)ソレノイド制御、及び、(k)解錠の各状態が示される。
In the figure, (a) start switch, (b) control unit start, (c) control unit initialization process, (d) main switch, (e) main switch determination value, (f) LF transmission, (g) Each state of portable device processing, (h) RF reception, (i) RF data determination, (j) solenoid control, and (k) unlocking is shown.
時刻t10に起動スイッチ17の操作の検出(0V)により、車載側制御部30に対して制御部起動が指示(「制御部起動:オン(ON)」)される。この指示に応じて、車載側制御部30は、初期化処理を実施して時刻t15までに終了する。初期化処理には、車載側制御部30の周辺部にあたる入出力ポートの設定処理や車載側受信部50の初期状態の調整等の処理などが含まれる。
At time t10, when the operation of the start switch 17 is detected (0 V), the in-vehicle control unit 30 is instructed to start the control unit (“control unit start: ON”). In response to this instruction, the in-vehicle control unit 30 performs initialization processing and ends by time t15. The initialization process includes a process for setting an input / output port corresponding to a peripheral part of the in-vehicle side control unit 30 and a process for adjusting an initial state of the in-vehicle side receiving unit 50.
車載側制御部30は、メインスイッチ状態取得部63によるメインスイッチ11の導通状態の取得結果に基づいて、メインスイッチ11が、オフ(OFF)の状態にあることを検出し、メインスイッチの判定結果(メインスイッチ判定値)をオフ(OFF)にした状態を継続する。
The in-vehicle side control unit 30 detects that the main switch 11 is in an OFF state based on the result of acquiring the conduction state of the main switch 11 by the main switch state acquisition unit 63, and the determination result of the main switch The state where the (main switch judgment value) is turned off is continued.
車載側制御部30は、車載側制御部30に登録されている携帯機に応じた「スマート認証通信」のためのLF信号を下記のように順に送信する。
The in-vehicle side control unit 30 sequentially transmits LF signals for “smart authentication communication” corresponding to the mobile device registered in the in-vehicle side control unit 30 as follows.
時刻t21において、車載装置100は、リクエスト信号の送信を開始して、時刻t22においてその送信を終了する。時刻t21から時刻t22までの間に、携帯端末装置200は、例えば、第1の認証用情報AUD1と、第2の認証用情報AUD2と、第3の認証用情報AUD3の信号の組を含むリクエスト信号を送信する。
携帯端末装置200は、リクエスト信号を受信する。この受信により、携帯端末装置200は、受信したリクエスト信号から抽出した信号の信号強度に応じて、受信感度特性を調整する。 At time t21, the in-vehicle device 100 starts transmitting a request signal and ends the transmission at time t22. Between the time t21 and the time t22, the mobile terminal device 200 requests, for example, a request including a set of signals of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3. Send a signal.
The mobileterminal device 200 receives the request signal. By this reception, the mobile terminal device 200 adjusts the reception sensitivity characteristic according to the signal strength of the signal extracted from the received request signal.
携帯端末装置200は、リクエスト信号を受信する。この受信により、携帯端末装置200は、受信したリクエスト信号から抽出した信号の信号強度に応じて、受信感度特性を調整する。 At time t21, the in-
The mobile
時刻t21から時刻t22までの間に、携帯端末装置200は、例えば、第1の認証用情報AUD1と、第2の認証用情報AUD2と、第3の認証用情報AUD3の信号を含むリクエスト信号を送信する。
携帯端末装置200は、リクエスト信号を受信して、リクエスト信号に基づいて認証処理を実施する。認証処理では、例えば、第1の認証用情報AUD1と、第2の認証用情報AUD2と、第3の認証用情報AUD3の信号の強度値の差分情報を用いた認証処理を実施する。例えば、携帯端末装置200は、上記の図6に示した送信パターン情報テーブルに示す回数の情報を記憶しておき、当該パターンに対応する回数を検出した際に、車載装置100からのリクエスト(要求)が携帯端末装置200に対するものと認証してもよい。認証処理の結果、車載装置100からのリクエスト(要求)が携帯端末装置200に対するものと認証した場合、携帯端末装置200は、時刻t22以降に携帯端末装置200からのアンサー信号(RFA)の送信を開始する。車載装置100は、車載側受信部50により送信されたアンサー信号(RFA)を受信する。 Between time t21 and time t22, the mobileterminal device 200 receives a request signal including signals of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3, for example. Send.
The mobileterminal device 200 receives the request signal and performs an authentication process based on the request signal. In the authentication process, for example, an authentication process is performed using difference information of signal strength values of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3. For example, the mobile terminal device 200 stores information on the number of times shown in the transmission pattern information table shown in FIG. 6 above, and when detecting the number of times corresponding to the pattern, a request (request) from the in-vehicle device 100 is stored. ) May be authenticated for the mobile terminal device 200. As a result of the authentication process, when the request from the in-vehicle device 100 is authenticated to the mobile terminal device 200, the mobile terminal device 200 transmits an answer signal (RFA) from the mobile terminal device 200 after time t22. Start. The in-vehicle device 100 receives the answer signal (RFA) transmitted by the in-vehicle side receiving unit 50.
携帯端末装置200は、リクエスト信号を受信して、リクエスト信号に基づいて認証処理を実施する。認証処理では、例えば、第1の認証用情報AUD1と、第2の認証用情報AUD2と、第3の認証用情報AUD3の信号の強度値の差分情報を用いた認証処理を実施する。例えば、携帯端末装置200は、上記の図6に示した送信パターン情報テーブルに示す回数の情報を記憶しておき、当該パターンに対応する回数を検出した際に、車載装置100からのリクエスト(要求)が携帯端末装置200に対するものと認証してもよい。認証処理の結果、車載装置100からのリクエスト(要求)が携帯端末装置200に対するものと認証した場合、携帯端末装置200は、時刻t22以降に携帯端末装置200からのアンサー信号(RFA)の送信を開始する。車載装置100は、車載側受信部50により送信されたアンサー信号(RFA)を受信する。 Between time t21 and time t22, the mobile
The mobile
時刻t23において、車載装置100は、受信したアンサー信号(RFA)に基づいて携帯端末装置200の認証(RFデータ判定)を実施する。例えば、携帯端末装置200の認証は、受信したアンサー信号(RFA)が正規のアンサー信号として規定されたものに一致するか否かを判断するようにしてもよい。車載装置100は、携帯端末装置200の認証が成功した場合(時刻t24)、車載側制御部30(駆動制御部34)は、各部のソレノイドを駆動させて各部の施錠状態を解錠するように制御する。時刻t25以降に各部の施錠状態が解錠される。
At time t23, the in-vehicle device 100 performs authentication (RF data determination) of the mobile terminal device 200 based on the received answer signal (RFA). For example, the authentication of the mobile terminal device 200 may determine whether or not the received answer signal (RFA) matches that specified as a regular answer signal. When the authentication of the mobile terminal device 200 is successful (time t24), the in-vehicle device 100 causes the in-vehicle side control unit 30 (drive control unit 34) to drive the solenoid of each unit to unlock the locked state of each unit. Control. The locking state of each part is unlocked after time t25.
(アンサー信号のフレーム構造)
図11は、本実施形態のRF通信にて送信するアンサー信号のフレーム構造を示す説明図である。以下、アンサー信号のフレーム構造をパターンRFAと称して説明する。 (Answer signal frame structure)
FIG. 11 is an explanatory diagram showing a frame structure of an answer signal transmitted by RF communication according to the present embodiment. Hereinafter, the frame structure of the answer signal will be described as a pattern RFA.
図11は、本実施形態のRF通信にて送信するアンサー信号のフレーム構造を示す説明図である。以下、アンサー信号のフレーム構造をパターンRFAと称して説明する。 (Answer signal frame structure)
FIG. 11 is an explanatory diagram showing a frame structure of an answer signal transmitted by RF communication according to the present embodiment. Hereinafter, the frame structure of the answer signal will be described as a pattern RFA.
同図に示すように、例えば、パターンRFAは、車載装置用情報と、第1の認証用情報AUD1の受信回数NAUD1#を示す情報と、第2の認証用情報AUD2の受信回数NAUD2#を示す情報と、第3の認証用情報AUD3の受信回数NAUD3#を示す情報と、誤り訂正情報ECC2などを含む。車載装置用情報は、少なくともトレーニングデータTDと、同期信号SYNC2と、識別情報を含む。さらに、車載装置用情報は、誤り訂正情報ECC2などのデータを含めてもよい。なお、パターンRFAのフレーム構造を有するアンサー信号の送出には、時間TRFAを要するものとする。
As shown in the figure, for example, the pattern RFA indicates in-vehicle device information, information indicating the number of receptions NAUD1 # of the first authentication information AUD1, and the number of receptions NAUD2 # of the second authentication information AUD2. Information, information indicating the number of receptions NAUD3 # of the third authentication information AUD3, error correction information ECC2, and the like. The in-vehicle device information includes at least training data TD, a synchronization signal SYNC2, and identification information. Further, the in-vehicle device information may include data such as error correction information ECC2. It is assumed that time TRFA is required for sending an answer signal having the frame structure of pattern RFA.
トレーニングデータTDは、パターンRFAを送信する際に最初に送信されるように配置されている。トレーニングデータTDには、車載装置100がパターンRFAを受信する際に車載側受信部50の調整に要する信号パターンが割り付けられる。
The training data TD is arranged to be transmitted first when the pattern RFA is transmitted. A signal pattern required for adjustment of the in-vehicle side receiving unit 50 when the in-vehicle device 100 receives the pattern RFA is assigned to the training data TD.
同期信号SYNC2は、例えばトレーニングデータTDの次に送信するように配置されている。同期信号SYNC2には、車載側受信部50がトレーニングデータTDによるトレーニングを終えた後に、各種情報を抽出する際に指標とする信号パターンと、パターン種別を識別する情報が含まれる。
The synchronization signal SYNC2 is arranged to be transmitted next to the training data TD, for example. The synchronization signal SYNC2 includes a signal pattern used as an index when extracting various types of information after the in-vehicle side receiving unit 50 finishes training with the training data TD, and information for identifying the pattern type.
誤り訂正情報ECC2は、パターンRFAにおいて、受信した受信回数NAUD1#を示す情報などの各データの誤り検出や誤り訂正を行うための情報である。誤り訂正情報ECC2は、パターンの種類ごとに、誤り検出や誤り訂正の対象範囲、及び、誤り検出や誤り訂正の手法などを適宜定めることができる。
The error correction information ECC2 is information for performing error detection and error correction of each data such as information indicating the received number of times of reception NAUD1 # in the pattern RFA. The error correction information ECC2 can appropriately determine an error detection and error correction target range, an error detection and error correction method, and the like for each type of pattern.
なお、第1の認証用情報AUD1の受信回数NAUD1#を示す情報と、第2の認証用情報AUD2の受信回数NAUD2#を示す情報と、第3の認証用情報AUD3の受信回数NAUD3#を示す情報と等の情報を、他の情報に関連付けてパターンRFAの一部に割り付けるようにしてもよい。例えば、第1の認証用情報AUD1の受信回数NAUD1#を示す情報と第1の認証用情報AUD1の受信信号強度を関連付けてもよい。その際、第1の認証用情報AUD1の受信回数NAUD1#を示す情報と第1の認証用情報AUD1の受信信号強度を示す情報とに、予め定めた係数を乗じて線形加算することによって、1つの情報にすることができる。このように、1つの情報にしたことにより、個々の情報を個別にパターンRFAに割つけることなく、多くの情報を短いフレーム長のパターンとして送信することができる。上記は第1の認証用情報AUD1について示したが、第2の認証用情報AUD2と第3の認証用情報AUD3についても同様である。
The information indicating the number of receptions NAUD1 # of the first authentication information AUD1, the information indicating the number of receptions NAUD2 # of the second authentication information AUD2, and the number of receptions NAUD3 # of the third authentication information AUD3 are shown. Information such as information may be assigned to a part of the pattern RFA in association with other information. For example, information indicating the number of receptions NAUD1 # of the first authentication information AUD1 may be associated with the received signal strength of the first authentication information AUD1. At this time, the information indicating the number of receptions NAUD1 # of the first authentication information AUD1 and the information indicating the received signal strength of the first authentication information AUD1 are multiplied by a predetermined coefficient to be linearly added. Can be one piece of information. As described above, by using one piece of information, a lot of information can be transmitted as a short frame length pattern without individually assigning each piece of information to the pattern RFA. The above is the first authentication information AUD1, but the same applies to the second authentication information AUD2 and the third authentication information AUD3.
車載装置100の判定部33は、同図に示すようなフレーム構造(RFA)を有するアンサー信号から、第1の認証用情報AUD1の受信回数NAUD1#と、第2の認証用情報AUD2の受信回数NAUD2#と、第3の認証用情報AUD3の受信回数NAUD3#と、を取得する。判定部33は、例えば、差分閾値(第1閾値)に基づいて「通常」の信号(第1の信号)と判別した回数と「差分信号(第2の信号)」と判別した回数とを含む情報に基づいて、車載側受信部50によって受信されたアンサー信号から、携帯端末装置200が受信した信号が正規のリクエスト信号であるか否かを判定する。この判定により、「通常」の信号(第1の信号)と判別した回数と「差分信号(第2の信号)」と判別した回数とを含む情報に基づいて、車載側受信部50によって受信された信号が正規のアンサー信号であると判定することができる。
The determination unit 33 of the in-vehicle device 100 receives the number of receptions NAUD1 # of the first authentication information AUD1 and the number of receptions of the second authentication information AUD2 from an answer signal having a frame structure (RFA) as shown in FIG. The NAUD2 # and the number of times of receiving the third authentication information AUD3 NAUD3 # are acquired. The determination unit 33 includes, for example, the number of times determined as a “normal” signal (first signal) and the number of times determined as a “difference signal (second signal)” based on the difference threshold (first threshold). Based on the information, it is determined from the answer signal received by the in-vehicle side receiving unit 50 whether or not the signal received by the mobile terminal device 200 is a regular request signal. Based on the information including the number of times determined as “normal” signal (first signal) and the number of times determined as “difference signal (second signal)” by this determination, the signal is received by the in-vehicle side receiving unit 50. It can be determined that the received signal is a normal answer signal.
図12と図13は、携帯端末装置認証システム1による効果を示す図である。図12と図13に示すグラフは、車載装置100と携帯端末装置200との距離を変えて、携帯端末装置200において検出された信号の組の信号強度の測定結果を示す。図12では、比較的遠くに位置する携帯端末装置200から車載装置100の解錠処理を行えるように、携帯端末装置200の受信感度特性を定めた一例を示す。この図に示すように、W1からW3に示すグラフは、それぞれが、第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3の受信強度を示す。約40(cm)から250(cm)の範囲で、W1からW3が分離しており、信号強度の違いを検出可能なことが分かる。この図に示す信号強度に対応するように、携帯端末装置200の受信感度特性を定めることにより、受信感度特性を調整しなくても上記の認証方法が適用可能である。
ただし、約40(cm)以下の範囲については、受信レベルが飽和してしまい、W1からW3を分離して受信できない。 12 and 13 are diagrams showing the effects of the mobile terminaldevice authentication system 1. FIG. The graphs shown in FIG. 12 and FIG. 13 show the measurement results of the signal strength of the set of signals detected in the mobile terminal device 200 by changing the distance between the in-vehicle device 100 and the mobile terminal device 200. FIG. 12 shows an example in which the reception sensitivity characteristic of the mobile terminal device 200 is determined so that the in-vehicle device 100 can be unlocked from the mobile terminal device 200 located relatively far away. As shown in this figure, the graphs indicated by W1 to W3 indicate the reception strengths of the first authentication information AUD1, the second authentication information AUD2, and the third authentication information AUD3, respectively. In the range of about 40 (cm) to 250 (cm), W1 to W3 are separated, and it can be seen that a difference in signal intensity can be detected. By defining the reception sensitivity characteristic of the mobile terminal device 200 so as to correspond to the signal intensity shown in this figure, the above authentication method can be applied without adjusting the reception sensitivity characteristic.
However, in the range of about 40 (cm) or less, the reception level is saturated and W1 and W3 cannot be separated and received.
ただし、約40(cm)以下の範囲については、受信レベルが飽和してしまい、W1からW3を分離して受信できない。 12 and 13 are diagrams showing the effects of the mobile terminal
However, in the range of about 40 (cm) or less, the reception level is saturated and W1 and W3 cannot be separated and received.
図13は、図12の測定条件に対して、携帯端末装置200の受信感度特性を調整した場合の測定結果を示す。図13に示す測定結果の測定条件では、図12に示した場合の測定条件より携帯端末装置200受信感度を低減させている。これにより、図12に示す結果では、W1からW3が分離していなかった約40(cm)以下の範囲において、分離して受信できたことが示されている。
FIG. 13 shows a measurement result when the reception sensitivity characteristic of the mobile terminal device 200 is adjusted with respect to the measurement conditions of FIG. In the measurement condition of the measurement result shown in FIG. 13, the reception sensitivity of the mobile terminal device 200 is reduced from the measurement condition in the case of FIG. As a result, the result shown in FIG. 12 shows that the signals can be separated and received in the range of about 40 (cm) or less where W1 to W3 were not separated.
このように、携帯端末装置認証システム1であれば、携帯端末装置200の受信感度特性を、実際に受信した信号の強度に基づいて調整することにより、認証用信号として用いる第1の認証用情報AUD1と第2の認証用情報AUD2と第3の認証用情報AUD3について信号強度が互いに異なる信号として受信することが可能になる。
Thus, in the case of the mobile terminal device authentication system 1, the first authentication information used as the authentication signal is adjusted by adjusting the reception sensitivity characteristic of the mobile terminal device 200 based on the intensity of the actually received signal. AUD1, second authentication information AUD2 and third authentication information AUD3 can be received as signals having different signal strengths.
上記の実施形態によれば、車載側制御部30は、リクエスト信号として、受信信号強度(RSSI)が異なるように設定された複数の認証用信号を含む信号を車載側送信部40に送信させ、携帯側受信部210は、車載側送信部40によって送信された信号をリクエスト信号として受信し、携帯側制御部230は、携帯側受信部210によって受信した認証用信号の強度値に基づいて携帯側受信部210の受信感度特性を指示して、指示された受信感度特性に携帯側受信部210の受信感度特性が調整された後に受信した複数の認証用信号を判別し、複数の認証用信号の判別結果を含むアンサー信号を携帯側送信部220に送信させ、車載側制御部30は、車載側受信部50によって受信された信号に含まれる複数の認証用信号の判別結果に基づいて、車載側受信部50によって受信されたアンサー信号から、前記携帯端末装置が受信した信号が正規のリクエスト信号であるか否かを判定することにより、認証のセキュリティ性を向上させることができる。
According to the above embodiment, the in-vehicle side control unit 30 causes the in-vehicle side transmission unit 40 to transmit a signal including a plurality of authentication signals set so that the received signal strength (RSSI) is different as the request signal, The portable side receiving unit 210 receives the signal transmitted by the in-vehicle side transmitting unit 40 as a request signal, and the portable side control unit 230 is based on the strength value of the authentication signal received by the portable side receiving unit 210. The reception sensitivity characteristic of the reception unit 210 is instructed, and a plurality of authentication signals received after the reception sensitivity characteristic of the mobile-side reception unit 210 is adjusted to the instructed reception sensitivity characteristic are determined. The answer signal including the determination result is transmitted to the mobile-side transmission unit 220, and the in-vehicle side control unit 30 determines the determination results of the plurality of authentication signals included in the signal received by the in-vehicle side reception unit 50. Based on the answer signal received by the in-vehicle side receiving unit 50, it is possible to improve the security of authentication by determining whether the signal received by the mobile terminal device is a legitimate request signal. .
(実施形態の第1の変形例)
以下、実施形態の第1の変形例について説明する。
上記の実施形態の携帯端末装置200は、受信信号を単一の系統で受信したが、第1の変形例の携帯端末装置200は、受信信号を複数の系統で受信する。以下、この点を中心に説明する。 (First Modification of Embodiment)
Hereinafter, a first modification of the embodiment will be described.
Although the mobileterminal device 200 of the above-described embodiment has received the reception signal by a single system, the mobile terminal device 200 of the first modification example receives the reception signal by a plurality of systems. Hereinafter, this point will be mainly described.
以下、実施形態の第1の変形例について説明する。
上記の実施形態の携帯端末装置200は、受信信号を単一の系統で受信したが、第1の変形例の携帯端末装置200は、受信信号を複数の系統で受信する。以下、この点を中心に説明する。 (First Modification of Embodiment)
Hereinafter, a first modification of the embodiment will be described.
Although the mobile
携帯側受信部210は、図示しない複数のアンテナを備えており、それぞれのアンテナからの信号を分離して検出する。それぞれのアンテナを、個々の系統(チャネル)に割り付ける。上記の複数のアンテナは、それぞれが独立した受信感度の指向特性を有している。例えば、各アンテナの指向特性は、互いに異なる方向に感度が高くなるように指向特性の軸が定められている。例えば、3つのアンテナの指向特性の軸が互いに直交するように定められ、携帯端末装置200の本体に対して各アンテナの軸が固定されるように、各アンテナが支持される。上記の3つのアンテナを3つのチャネル(ch1、ch2、ch3)に割り付ける。
The mobile-side receiving unit 210 includes a plurality of antennas (not shown), and detects signals from the respective antennas separately. Each antenna is assigned to an individual system (channel). Each of the plurality of antennas has directivity characteristics with independent reception sensitivity. For example, the directivity axis of each antenna is determined so that the sensitivity increases in different directions. For example, the directivity axes of the three antennas are determined to be orthogonal to each other, and the antennas are supported so that the axes of the antennas are fixed to the main body of the mobile terminal device 200. The above three antennas are allocated to three channels (ch1, ch2, ch3).
携帯側受信部210は、各アンテナからの信号をチャネルごとに分離して検出し、各チャネルの受信信号強度を個別に判定可能とする。
The mobile-side receiving unit 210 detects a signal from each antenna separately for each channel, and can individually determine the received signal strength of each channel.
携帯側制御部230は、携帯側受信部210によってチャネルごとに分離して受信した認証用信号の強度値に基づいて携帯側受信部210の受信感度特性を指示する。携帯側制御部230は、指示された受信感度特性に携帯側受信部210の受信感度特性が調整された後に受信した複数の認証用信号を判別する。
The mobile side control unit 230 instructs the reception sensitivity characteristic of the mobile side reception unit 210 based on the strength value of the authentication signal received by the mobile side reception unit 210 separately for each channel. The portable control unit 230 determines a plurality of authentication signals received after the reception sensitivity characteristic of the portable reception unit 210 is adjusted to the instructed reception sensitivity characteristic.
上記の第1の変形例であれば、受信信号を複数の系統にそれぞれ割り付けたチャネルごとに分離して受信した認証用信号を判定することにより、リクエスト信号を検出する確率を高めることができる。
In the case of the first modification described above, it is possible to increase the probability of detecting a request signal by determining the received authentication signal by separating the received signal for each channel assigned to a plurality of systems.
(実施形態の第2の変形例)
以下、実施形態の第2の変形例について説明する。上記の第1の変形例の携帯端末装置200は、受信信号を複数の系統で受信するものであるが、第2の変形例の携帯端末装置200は、受信信号を複数の系統で受信するための構成を簡素化するものである。以下、この点を中心に説明する。 (Second Modification of Embodiment)
Hereinafter, a second modification of the embodiment will be described. The mobileterminal device 200 of the first modified example receives a received signal by a plurality of systems, but the mobile terminal device 200 of the second modified example receives a received signal by a plurality of systems. This simplifies the configuration. Hereinafter, this point will be mainly described.
以下、実施形態の第2の変形例について説明する。上記の第1の変形例の携帯端末装置200は、受信信号を複数の系統で受信するものであるが、第2の変形例の携帯端末装置200は、受信信号を複数の系統で受信するための構成を簡素化するものである。以下、この点を中心に説明する。 (Second Modification of Embodiment)
Hereinafter, a second modification of the embodiment will be described. The mobile
単にチャネルごとに分離して受信可能にした場合、携帯端末装置200の構成が複雑になる。そこで、本変形例の携帯端末装置200は、その構成を簡素化するために、例えば、各アンテナからの信号をチャネルごとに分離して検出し、各チャネルの信号の増幅率を所望の値に揃えるが、増幅後の各チャネルの認証用信号を個々に判別できるように構成する。
上記の実施形態および第1の変形例と同様に、受信制御部234は、複数の測定レンジのうちから何れかの測定レンジを選択可能とする。例えば、以下の説明では、選択可能な測定レンジを2つ有しているものとする。2つの測定レンジは、比較的遠距離に配置された携帯端末装置200の認証に適した第1測定レンジと、比較的近距離に配置された携帯端末装置200の認証に適した第2測定レンジである。第1測定レンジと第2測定レンジは、携帯端末装置200が受信する電波の受信電力の範囲が異なる。
受信制御部234は、複数の測定レンジのうちから何れかの測定レンジを、各チャネルに共通の測定レンジとして選択し、携帯側受信部210の受信感度特性を選択した測定レンジに対応させる。 If the reception is performed by simply separating each channel, the configuration of the mobileterminal device 200 becomes complicated. Therefore, in order to simplify the configuration of the mobile terminal device 200 according to the present modification, for example, the signal from each antenna is detected separately for each channel, and the amplification factor of the signal of each channel is set to a desired value. Although it arranges, it is comprised so that the authentication signal of each channel after amplification can be discriminated individually.
Similarly to the above embodiment and the first modification, thereception control unit 234 can select any one of the plurality of measurement ranges. For example, in the following description, it is assumed that there are two selectable measurement ranges. The two measurement ranges are a first measurement range suitable for authentication of the mobile terminal device 200 arranged at a relatively long distance and a second measurement range suitable for authentication of the mobile terminal device 200 arranged at a relatively short distance. It is. The first measurement range and the second measurement range are different in the range of received power of radio waves received by the mobile terminal device 200.
Thereception control unit 234 selects one of the plurality of measurement ranges as a measurement range common to each channel, and causes the reception sensitivity characteristic of the mobile-side reception unit 210 to correspond to the selected measurement range.
上記の実施形態および第1の変形例と同様に、受信制御部234は、複数の測定レンジのうちから何れかの測定レンジを選択可能とする。例えば、以下の説明では、選択可能な測定レンジを2つ有しているものとする。2つの測定レンジは、比較的遠距離に配置された携帯端末装置200の認証に適した第1測定レンジと、比較的近距離に配置された携帯端末装置200の認証に適した第2測定レンジである。第1測定レンジと第2測定レンジは、携帯端末装置200が受信する電波の受信電力の範囲が異なる。
受信制御部234は、複数の測定レンジのうちから何れかの測定レンジを、各チャネルに共通の測定レンジとして選択し、携帯側受信部210の受信感度特性を選択した測定レンジに対応させる。 If the reception is performed by simply separating each channel, the configuration of the mobile
Similarly to the above embodiment and the first modification, the
The
図14は、変形例の携帯端末装置200の測定レンジ設定処理の手順を示すフローチャートである。なお、測定レンジ設定処理は、前述の図9のステップS406に対応する。
FIG. 14 is a flowchart illustrating a procedure of measurement range setting processing of the mobile terminal device 200 according to the modification. The measurement range setting process corresponds to step S406 in FIG.
まず、受信制御部234は、各チャネルのアンテナで検出された各軸方向の信号成分を受信する。例えば、受信制御部234は、3つのチャネル(ch1、ch2、ch3)のそれぞれについて、VGA217の増幅率の値を、各チャネルの最適レンジ情報として取得する(ステップS4061)。
First, the reception control unit 234 receives the signal component in each axial direction detected by the antenna of each channel. For example, the reception control unit 234 acquires the value of the amplification factor of the VGA 217 for each of the three channels (ch1, ch2, ch3) as the optimum range information of each channel (step S4061).
次に、受信制御部234は、それぞれ取得した3つの値の平均値を算出し、算出した平均値が予め定められた閾値より大きいか否かにより、上記の第1測定レンジにするか、第2測定レンジにするかを選択する。
Next, the reception control unit 234 calculates an average value of the three acquired values, and determines whether the calculated average value is greater than a predetermined threshold value, whether the first measurement range is set, 2 Select whether to set the measurement range.
例えば、第1の測定例として、受信制御部234は、3つのチャネルのそれぞれのVGA217の増幅率の値が18dBと18dBと18dBであった場合、それらの平均値を18dBと算出し、判定の結果を第2測定レンジにする。
For example, as a first measurement example, the reception control unit 234 calculates the average value of 18 dB, 18 dB, and 18 dB when the values of the amplification factors of the VGA 217 of the three channels are 18 dB. The result is in the second measurement range.
第2の測定例として、受信制御部234は、上記のそれぞれのVGA217の増幅率の値が36dBと30dBと18dBであった場合、それらの平均値を30dBと算出し、判定の結果を第2測定レンジにする。
As a second measurement example, when the amplification factor values of the respective VGA 217 are 36 dB, 30 dB, and 18 dB, the reception control unit 234 calculates the average value thereof as 30 dB, and the determination result is the second. Set to the measurement range.
第3の測定例として、受信制御部234は、上記のそれぞれのVGA217の増幅率の値が36dBと36dBと18dBであった場合、それらの平均値を36dBと算出し、判定の結果を第1測定レンジにする。
As a third measurement example, the reception control unit 234 calculates the average value of 36 dB, 36 dB, and 18 dB when the gain values of the respective VGAs 217 are 36 dB, 36 dB, and 18 dB. Set to the measurement range.
上記の方法に従って、受信制御部234は、3つのチャネルに対応するVGA217の増幅率の値から、3つのチャネルのそれぞれに共通して利用可能な増幅率を算出する。受信制御部234は、選択した最適レンジ情報に基づいて、VGA217を設定する(ステップS4062)。
In accordance with the above method, the reception control unit 234 calculates the amplification factor that can be commonly used for each of the three channels from the amplification factor value of the VGA 217 corresponding to the three channels. The reception control unit 234 sets the VGA 217 based on the selected optimum range information (step S4062).
なお、上記の処理では、最適レンジの候補の数を2つにした場合を例示したが、最適レンジの候補の数を3つ以上にしてもよい。
In the above processing, the case where the number of optimal range candidates is two is illustrated, but the number of optimal range candidates may be three or more.
上記の第2の変形例であれば、受信信号を複数の系統で受信するための増幅部(例えばVGA217)を各チャネルで共用することにより、増幅部の構成を簡素化することができる。
In the case of the second modification described above, the configuration of the amplifying unit can be simplified by sharing the amplifying unit (for example, VGA 217) for receiving the received signal with a plurality of systems in each channel.
以上説明した実施形態によれば、携帯側制御部230は、携帯側受信部210によって受信した認証用信号の強度値に基づいて携帯側受信部210の受信感度特性を指示して、指示された受信感度特性に前記携帯側受信部210の受信感度特性が調整された後に受信した複数の認証用信号を判別する。例えば、携帯側制御部230は、複数の認証用信号の判別結果を含むアンサー信号を携帯側送信部220に送信させる。車載側制御部30は、車載側受信部50によって受信された信号に含まれる複数の認証用信号の判別結果に基づいて、車載側受信部50によって受信されたアンサー信号から、前記携帯端末装置が受信した信号が正規のリクエスト信号であるか否かを判定することにより、携帯端末装置認証システム1は、認証のセキュリティ性を向上させることができる。なお、携帯端末装置200が受信した信号が正規のリクエスト信号であるか否かの判定の結果を、携帯側受信部210が正規のリクエスト信号を受信した通信であるか否かの判定の結果としてもよい。
According to the embodiment described above, the portable side control unit 230 is instructed by instructing the reception sensitivity characteristic of the portable side reception unit 210 based on the strength value of the authentication signal received by the portable side reception unit 210. A plurality of authentication signals received after the reception sensitivity characteristic of the portable receiver 210 is adjusted to the reception sensitivity characteristic are discriminated. For example, the mobile-side control unit 230 causes the mobile-side transmission unit 220 to transmit an answer signal including the determination results of a plurality of authentication signals. The in-vehicle side control unit 30 determines whether the portable terminal device is based on the answer signal received by the in-vehicle side reception unit 50 based on the determination results of the plurality of authentication signals included in the signal received by the in-vehicle side reception unit 50. By determining whether or not the received signal is a regular request signal, the mobile terminal device authentication system 1 can improve the security of authentication. In addition, the result of the determination whether the signal received by the mobile terminal device 200 is a regular request signal is the result of the determination whether the mobile-side receiving unit 210 is a communication that has received the regular request signal. Also good.
携帯端末装置認証システム1の携帯側制御部230は、携帯側受信部210によって受信した認証用信号の強度値に基づいて調整された携帯側受信部210の受信感度特性のもとで複数の認証用信号を受信させて、強度値に基づいて複数の認証用信号を判別し、アンサー信号を携帯側送信部220に送信させてもよい。
The mobile side control unit 230 of the mobile terminal device authentication system 1 performs a plurality of authentications based on the reception sensitivity characteristics of the mobile side reception unit 210 adjusted based on the intensity value of the authentication signal received by the mobile side reception unit 210. The authentication signal may be received, a plurality of authentication signals may be determined based on the intensity value, and the answer signal may be transmitted to the mobile-side transmitting unit 220.
車載側制御部30は、前記認証用信号の送信時間と、前記認証用信号の判別結果とを比較し、当該比較の結果に基づいて、携帯端末装置200が受信した信号が正規のリクエスト信号であるか否かを判定するようにしてもよい。
The in-vehicle side control unit 30 compares the transmission time of the authentication signal with the determination result of the authentication signal, and based on the comparison result, the signal received by the mobile terminal device 200 is a normal request signal. You may make it determine whether it exists.
認証用信号は、第1の信号と、前記第1の信号に比して信号強度が小さい第2の信号とを含む。車載側制御部30は、第1閾値に基づいて前記第1の信号と判別した回数と前記第2の信号と判別した回数とを含む情報に基づいて、車載側受信部50によって受信されたアンサー信号を判定するようにしてもよい。
The authentication signal includes a first signal and a second signal whose signal strength is smaller than that of the first signal. The vehicle-mounted side control unit 30 receives the answer received by the vehicle-mounted side receiving unit 50 based on information including the number of times determined as the first signal and the number of times determined as the second signal based on the first threshold. The signal may be determined.
認証用信号は、第1の信号と、前記第1の信号に比して信号強度が小さい第2の信号とを含む。携帯側制御部230は、前記第1の信号と前記第2の信号とを識別可能な第1閾値と、前記第2の信号に比して信号強度が小さい第3の信号とを識別する第2閾値とに基づいて判別し、前記第1の信号と判別した回数と、前記第2の信号と判別した回数と、前記第3の信号と判定した回数とを含む情報を、前記複数の認証用信号の判別結果を示す情報とする。携帯側制御部230は、前記アンサー信号を前記携帯側送信部に送信させ、前記車載側制御部は、前記第1の信号と判別した回数と前記第2の信号と判別した回数と前記第3の信号と判定した回数とを含む情報に基づいて、前記車載側受信部によって受信されたアンサー信号を判定するようにしてもよい。
The authentication signal includes a first signal and a second signal whose signal strength is smaller than that of the first signal. The portable-side control unit 230 identifies a first threshold that can identify the first signal and the second signal, and a third signal that has a smaller signal strength than the second signal. Information based on two threshold values and including the number of times determined as the first signal, the number of times determined as the second signal, and the number of times determined as the third signal. Information indicating the discrimination result of the signal. The portable side control unit 230 causes the portable side transmission unit to transmit the answer signal, and the in-vehicle side control unit determines the number of times determined as the first signal, the number of times determined as the second signal, and the third number. The answer signal received by the in-vehicle side receiving unit may be determined based on information including the number of times of the determination and the number of times determined.
車載側制御部は、前記第2の信号と判別した回が無かった(回数が0であった)場合、前記車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にないと判定し、前記第2の信号と判別した回が有った(回数が1以上であった)場合、前記車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にあると判定するようにしてもよい。
The in-vehicle side control unit determines that the signal received by the in-vehicle side reception unit corresponds to the reception sensitivity characteristic of the portable side reception unit when the number of times determined as the second signal is not (the number of times is 0). The signal received by the in-vehicle side receiving unit is the portable side receiving unit when it is determined that the signal is not in an appropriate state and there is a time when the second signal is determined (the number of times is 1 or more). It may be determined that the reception sensitivity characteristic is in an appropriate state.
係る構成によれば、携帯端末装置認証システムは、第2の信号と判別したことにより、車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にあると判定することができ、認証時の判定精度をより高めることができる。
According to this configuration, the mobile terminal device authentication system determines that the signal is the second signal, so that the signal received by the in-vehicle side receiving unit is in an appropriate state with respect to the reception sensitivity characteristic of the mobile side receiving unit. And the determination accuracy at the time of authentication can be further improved.
車載側制御部は、アンサー信号に含まれる前記複数の認証用信号の判別結果に基づいて、前記携帯側受信部によって受信された信号が、前記車載側送信部によって送信されたリクエスト信号であるか否かを判定するようにしてもよい。
Whether the in-vehicle side control unit is a request signal transmitted by the in-vehicle side transmission unit based on a determination result of the plurality of authentication signals included in the answer signal. It may be determined whether or not.
車載側制御部は、アンサー信号に含まれる前記複数の認証用信号の判別結果に基づいて、前記車載側受信部によって受信された信号が、前記携帯側送信部によって送信された前記アンサー信号であるか否かを判定するようにしてもよい。
The vehicle-mounted side control unit is the answer signal transmitted by the mobile-side transmitting unit based on the determination result of the plurality of authentication signals included in the answer signal. It may be determined whether or not.
車載側制御部は、予め定められたパターンのうちから不規則に決定された送信時間の前記認証用信号を前記車載側送信部に送信させるようにしてもよい。
The in-vehicle side control unit may cause the in-vehicle side transmission unit to transmit the authentication signal having a transmission time irregularly determined from a predetermined pattern.
実施形態における携帯端末装置認証システム1によれば、送信用アンテナ45の共振特性に基づいて、複数の認証用情報の送信時の周波数を設定することによって、リクエスト信号の信号強度を簡易に変更することができる。
また、実施形態における携帯端末装置認証システム1によれば、車載側制御部30(通信制御部32)が、不規則的に決定した送信時間で、リクエスト信号を車載側送信部40に送信させることによって、情報の秘匿性が向上し、認証時の判定精度を、より高めることができる。 According to the mobile terminaldevice authentication system 1 in the embodiment, the signal strength of the request signal is easily changed by setting the frequency at the time of transmission of a plurality of pieces of authentication information based on the resonance characteristics of the transmission antenna 45. be able to.
Moreover, according to the portable terminaldevice authentication system 1 in the embodiment, the in-vehicle side control unit 30 (communication control unit 32) causes the in-vehicle side transmission unit 40 to transmit a request signal with an irregularly determined transmission time. Thus, the confidentiality of information is improved, and the determination accuracy at the time of authentication can be further increased.
また、実施形態における携帯端末装置認証システム1によれば、車載側制御部30(通信制御部32)が、不規則的に決定した送信時間で、リクエスト信号を車載側送信部40に送信させることによって、情報の秘匿性が向上し、認証時の判定精度を、より高めることができる。 According to the mobile terminal
Moreover, according to the portable terminal
以下、その他の実施形態(変形例)について説明する。
上述した実施形態における携帯端末装置認証システム1は、例えば、乗用車等の車両ドアを有する自動車に適用されてもよい。この場合、携帯端末装置200が車載装置100によって認証されたときに、車両ドアの施錠を解錠するようにしてもよい。 Hereinafter, other embodiments (modifications) will be described.
The mobile terminaldevice authentication system 1 in the above-described embodiment may be applied to an automobile having a vehicle door such as a passenger car, for example. In this case, when the mobile terminal device 200 is authenticated by the in-vehicle device 100, the locking of the vehicle door may be unlocked.
上述した実施形態における携帯端末装置認証システム1は、例えば、乗用車等の車両ドアを有する自動車に適用されてもよい。この場合、携帯端末装置200が車載装置100によって認証されたときに、車両ドアの施錠を解錠するようにしてもよい。 Hereinafter, other embodiments (modifications) will be described.
The mobile terminal
また、上述した実施形態における携帯端末装置認証システム1は、携帯端末装置200が受信した信号が正規のリクエスト信号であるか否かの判定を、携帯端末装置200側、すなわち、携帯側制御部230が実施するようにしてもよい。例えば、携帯側制御部230が、車載側制御部30の処理として上記で説明した判定処理を実施することにより、携帯端末装置200側で判定の結果を得ることができる。なお、上記の場合、携帯側制御部230は、上記の判定の結果をアンサー信号に含めて、車載装置100宛に送信したり、携帯端末装置200が備える表示部に表示したり、車載装置100以外の外部の装置に通知して出力させたり、するように制御してもよい。
In addition, the mobile terminal device authentication system 1 in the above-described embodiment determines whether the signal received by the mobile terminal device 200 is a legitimate request signal, based on the mobile terminal device 200 side, that is, the mobile side control unit 230. May be implemented. For example, the mobile-side control unit 230 can obtain the determination result on the mobile terminal device 200 side by performing the determination process described above as the process of the in-vehicle side control unit 30. In the above case, the mobile-side control unit 230 includes the result of the above determination in the answer signal, transmits it to the in-vehicle device 100, displays it on the display unit included in the mobile terminal device 200, or displays the in-vehicle device 100. Control may be made so that an external device other than the above is notified and output.
また、上述した実施形態における携帯端末装置認証システム1において、リクエスト信号に含まれる認証用情報の送出(送信)時の信号強度(出力)は、共振部42の共振特性と周波数の差異とによって変動させるものとして説明したが、これに限られない。例えば、共振部42の共振特性を疑似的に摸したフィルタ回路等によって、認証用情報ごとの信号強度(あるいは利得)に差異を持たせてもよい。また、上記フィルタ回路は、アナログ回路やディジタル回路、またはこれら回路の組み合わせで実現されてもよく、例えば、車載側制御部30が、正弦波、又は、高調波成分を抑圧した周期性信号を生成して、駆動部41に供給してもよい。
In the mobile terminal device authentication system 1 according to the above-described embodiment, the signal strength (output) at the time of transmission (transmission) of the authentication information included in the request signal varies depending on the resonance characteristic of the resonance unit 42 and the difference in frequency. However, the present invention is not limited to this. For example, the signal strength (or gain) for each piece of authentication information may be made different by a filter circuit or the like in which the resonance characteristics of the resonance unit 42 are simulated. The filter circuit may be realized by an analog circuit, a digital circuit, or a combination of these circuits. For example, the in-vehicle control unit 30 generates a periodic signal in which a sine wave or a harmonic component is suppressed. And you may supply to the drive part 41. FIG.
以上、本発明を実施するための形態について実施形態を用いて説明したが、本発明はこうした実施形態に何等限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々の変形及び置換を加えることができる。
As mentioned above, although the form for implementing this invention was demonstrated using embodiment, this invention is not limited to such embodiment at all, In the range which does not deviate from the summary of this invention, various deformation | transformation and substitution Can be added.
1…携帯端末装置認証システム、6…キックペダル、7…キック作動部、8…変換部、16…ハンドルロック部、17…起動スイッチ、18…アクチュエータ部、100…車載装置、20…電源部、30…車載側制御部、31…始動制御部、32…通信制御部、33…判定部、34…駆動制御部、35…記憶部、40…車載側送信部、50…車載側受信部、61…駆動回路部、62…入力回路部、63…メインスイッチ状態取得部、64…メインリレー駆動部、65…スターター駆動部、200…携帯端末装置、210…携帯側受信部、220…携帯側送信部、230…携帯側制御部、231…信号強度測定部、232…信号判定部、233…信号生成部、234…受信制御部、V…スクータ、E…エンジン、P…パワーユニット、B…バッテリ、H…ハンドル
DESCRIPTION OF SYMBOLS 1 ... Portable terminal device authentication system, 6 ... Kick pedal, 7 ... Kick operation part, 8 ... Conversion part, 16 ... Handle lock part, 17 ... Start switch, 18 ... Actuator part, 100 ... In-vehicle apparatus, 20 ... Power supply part, DESCRIPTION OF SYMBOLS 30 ... Car-mounted side control part, 31 ... Start-up control part, 32 ... Communication control part, 33 ... Determination part, 34 ... Drive control part, 35 ... Memory | storage part, 40 ... Car-mounted side transmission part, 50 ... Car-mounted side receiving part, 61 DESCRIPTION OF SYMBOLS ... Drive circuit part 62 ... Input circuit part 63 ... Main switch state acquisition part, 64 ... Main relay drive part, 65 ... Starter drive part, 200 ... Portable terminal device, 210 ... Portable side receiver, 220 ... Portable side transmission , 230... Portable side control unit, 231... Signal strength measurement unit, 232... Signal determination unit, 233... Signal generation unit, 234 .. reception control unit, V .. scooter, E. Teri, H ... handle
Claims (12)
- 信号を送信する車載側送信部と、
信号を受信する車載側受信部と、
前記車載側送信部に前記リクエスト信号を送信させるとともに、前記車載側受信部によって受信されたアンサー信号を判定する車載側制御部と、を有する車載装置と、
信号を受信する携帯側受信部と、
信号を送信する携帯側送信部と、
前記携帯側受信部が前記リクエスト信号を受信するのに応じて、前記リクエスト信号に対するアンサー信号を送信するように前記携帯側送信部を制御する携帯側制御部と、を有する携帯端末装置と、
を備え、
前記車載側制御部は、
前記リクエスト信号として、受信信号強度が異なるように設定された複数の認証用信号を含む信号を前記車載側送信部に送信させ、
前記携帯側受信部は、
制御により受信感度特性の調整が可能であり、前記車載側送信部によって送信された信号を、前記リクエスト信号として受信し、
前記携帯側制御部は、
前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した前記複数の認証用信号を判別し、
前記車載側制御部又は前記携帯側制御部は、
前記複数の認証用信号の判別結果に基づいて前記携帯側受信部が正規のリクエスト信号を受信した通信であるか否かを判定する、
携帯端末装置認証システム。 An in-vehicle transmission unit that transmits signals;
A vehicle-side receiving unit for receiving signals;
An in-vehicle device having an in-vehicle side control unit that transmits the request signal to the in-vehicle side transmission unit and determines an answer signal received by the in-vehicle side reception unit;
A mobile-side receiving unit for receiving signals;
A portable transmitter that transmits a signal;
A portable terminal device having a portable side control unit that controls the portable side transmission unit to transmit an answer signal to the request signal in response to the portable side reception unit receiving the request signal;
With
The vehicle-mounted side control unit
As the request signal, a signal including a plurality of authentication signals set to have different received signal strengths is transmitted to the in-vehicle side transmission unit,
The mobile-side receiver is
The reception sensitivity characteristic can be adjusted by control, and the signal transmitted by the vehicle-mounted side transmission unit is received as the request signal.
The portable side control unit is
Based on the strength value of the authentication signal received by the portable-side receiver, the reception sensitivity characteristic of the portable-side receiver is instructed, and the reception sensitivity characteristic of the portable-side receiver is adjusted to the instructed reception sensitivity characteristic The plurality of authentication signals received after being received,
The in-vehicle side control unit or the portable side control unit is
It is determined whether or not the mobile-side receiving unit is a communication that has received a normal request signal based on the determination results of the plurality of authentication signals.
Mobile terminal device authentication system. - 前記携帯側制御部は、
前記複数の認証用信号の前記判別結果を含む前記アンサー信号を前記携帯側送信部に送信させる、
請求項1に記載の携帯端末装置認証システム。 The portable side control unit is
Transmitting the answer signal including the determination results of the plurality of authentication signals to the portable-side transmission unit;
The mobile terminal device authentication system according to claim 1. - 前記携帯側制御部は、
前記携帯側受信部によって受信した認証用信号の強度値に基づいて調整された前記携帯側受信部の受信感度特性のもとで前記複数の認証用信号を受信させて、前記強度値に基づいて前記複数の認証用信号を判別し、前記アンサー信号を前記携帯側送信部に送信させる、
請求項1又は請求項2に記載の携帯端末装置認証システム。 The portable side control unit is
Based on the intensity value, the plurality of authentication signals are received based on the reception sensitivity characteristic of the portable side receiver adjusted based on the strength value of the authentication signal received by the portable side receiver. Determining the plurality of authentication signals, and transmitting the answer signal to the mobile-side transmitter.
The mobile terminal device authentication system according to claim 1 or 2. - 前記車載側制御部は、前記認証用信号の送信時間と、前記認証用信号の判別結果とを比較し、当該比較の結果に基づいて、前記携帯端末装置が受信した信号が正規のリクエスト信号であるか否かを判定する、
請求項1から請求項3の何れか1項に記載の携帯端末装置認証システム。 The in-vehicle side control unit compares the transmission time of the authentication signal with the determination result of the authentication signal, and based on the comparison result, the signal received by the mobile terminal device is a normal request signal. Determine if there is,
The portable terminal device authentication system according to any one of claims 1 to 3. - 前記認証用信号は、第1の信号と、前記第1の信号に比して信号強度が小さい第2の信号とを含み、
前記携帯側制御部は、
前記第1の信号と前記第2の信号とを識別可能な第1閾値に基づいて前記認証用信号を判別し、前記第1の信号と判別した回数と、前記第2の信号と判別した回数とを含む情報を、前記複数の認証用信号の前記判別結果として含む前記アンサー信号を前記携帯側送信部に送信させ、
前記車載側制御部は、
前記第1の信号と判別した前記回数と前記第2の信号と判別した前記回数とを含む前記情報に基づいて、前記車載側受信部によって受信された前記アンサー信号を判定する、
請求項1から請求項3の何れか1項に記載の携帯端末装置認証システム。 The authentication signal includes a first signal and a second signal having a signal strength smaller than that of the first signal,
The portable side control unit is
The number of times that the authentication signal is discriminated based on a first threshold that can distinguish the first signal and the second signal, the number of times the discriminating from the first signal, and the number of times discriminating from the second signal And sending the answer signal including the information including the authentication result as the determination result of the plurality of authentication signals to the portable-side transmitter,
The vehicle-mounted side control unit
Based on the information including the number of times determined as the first signal and the number of times determined as the second signal, the answer signal received by the in-vehicle side receiving unit is determined,
The portable terminal device authentication system according to any one of claims 1 to 3. - 前記認証用信号は、第1の信号と、前記第1の信号に比して信号強度が小さい第2の信号と、前記第2の信号に比して信号強度が小さい第3の信号とを含み、
前記携帯側制御部は、
前記第1の信号と前記第2の信号とを識別可能な第1閾値と、前記第2の信号と前記第3の信号とを識別可能な第2閾値とに基づいて前記認証用信号を判別し、前記第1の信号と判別した回数と、前記第2の信号と判別した回数と、前記第3の信号と判別した回数とを含む情報を、前記複数の認証用信号の前記判別結果として含む前記アンサー信号を前記携帯側送信部に送信させ、
前記車載側制御部は、前記第1の信号と判別した前記回数と前記第2の信号と判別した前記回数と前記第3の信号と判別した前記回数とを含む前記情報に基づいて、前記車載側受信部によって受信された前記アンサー信号を判定する、
請求項1から請求項3の何れか1項に記載の携帯端末装置認証システム。 The authentication signal includes a first signal, a second signal having a signal strength lower than that of the first signal, and a third signal having a signal strength lower than that of the second signal. Including
The portable side control unit is
The authentication signal is discriminated based on a first threshold that can distinguish the first signal and the second signal and a second threshold that can distinguish the second signal and the third signal. And information including the number of times determined as the first signal, the number determined as the second signal, and the number determined as the third signal is used as the determination result of the plurality of authentication signals. Including the answer signal including the transmitter on the portable side,
The vehicle-mounted control unit is configured to perform the vehicle-mounted control based on the information including the number of times determined as the first signal, the number of times determined as the second signal, and the number of times determined as the third signal. Determining the answer signal received by the side receiving unit;
The portable terminal device authentication system according to any one of claims 1 to 3. - 前記車載側制御部は、
前記第2の信号と判別した前記回数が0であった場合、前記車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にないと判定し、
前記第2の信号と判別した前記回数が1以上であった場合、前記車載側受信部によって受信された信号が前記携帯側受信部の受信感度特性に対して適正な状態にあると判定する、
請求項5又は請求項6記載の携帯端末装置認証システム。 The vehicle-mounted side control unit
When the number of times determined as the second signal is 0, it is determined that the signal received by the in-vehicle side reception unit is not in an appropriate state with respect to the reception sensitivity characteristic of the mobile side reception unit,
When the number of times determined as the second signal is 1 or more, it is determined that the signal received by the in-vehicle side receiving unit is in an appropriate state with respect to the reception sensitivity characteristic of the portable side receiving unit,
The mobile terminal device authentication system according to claim 5 or 6. - 前記車載側制御部は、
前記アンサー信号に含まれる前記複数の認証用信号の前記判別結果に基づいて、前記携帯側受信部によって受信された信号が、前記車載側送信部によって送信された前記リクエスト信号であるか否かを判定する、
請求項1から請求項7の何れか1項に記載の携帯端末装置認証システム。 The vehicle-mounted side control unit
Whether or not the signal received by the mobile-side receiving unit is the request signal transmitted by the in-vehicle side transmitting unit based on the determination result of the plurality of authentication signals included in the answer signal judge,
The mobile terminal device authentication system according to any one of claims 1 to 7. - 前記車載側制御部は、
前記アンサー信号に含まれる前記複数の認証用信号の前記判別結果に基づいて、前記車載側受信部によって受信された信号が、前記携帯側送信部によって送信された前記アンサー信号であるか否かを判定する、
請求項1から請求項8の何れか1項に記載の携帯端末装置認証システム。 The vehicle-mounted side control unit
Based on the determination result of the plurality of authentication signals included in the answer signal, whether or not the signal received by the in-vehicle side receiving unit is the answer signal transmitted by the portable side transmitting unit. judge,
The portable terminal device authentication system according to any one of claims 1 to 8. - 前記車載側制御部は、予め定められたパターンのうちから不規則に決定された送信時間の前記認証用信号を前記車載側送信部に送信させる、
請求項1から請求項9のうちいずれか1項に記載の携帯端末装置認証システム。 The in-vehicle side control unit causes the in-vehicle side transmission unit to transmit the authentication signal having a transmission time irregularly determined from predetermined patterns.
The portable terminal device authentication system according to any one of claims 1 to 9. - 携帯端末装置へリクエスト信号を送信する車載側送信部と、
信号を受信する車載側受信部と、
前記車載側送信部に前記リクエスト信号を送信させるとともに、前記携帯端末装置から送信され前記車載側受信部によって受信されたアンサー信号を判定する車載側制御部と、
を備え、
前記車載側制御部は、
前記リクエスト信号として、受信信号強度が異なるように設定された複数の認証用信号を含む信号を前記車載側送信部に送信させ、
前記車載側受信部は、
前記携帯端末装置によって受信した認証用信号の強度値に基づいて前記携帯端末装置の受信感度特性が調整されて、前記携帯端末装置の受信感度特性が調整された後に前記携帯端末装置が受信した前記複数の認証用信号が判別された結果を含む信号を受信して、
前記車載側制御部は、
前記車載側受信部によって受信された信号に含まれる前記複数の認証用信号の判別結果に基づいて、前記車載側受信部によって受信された前記アンサー信号から、前記携帯端末装置が受信した信号が正規のリクエスト信号であるか否かを判定する、
車載装置。 An in-vehicle transmission unit that transmits a request signal to the mobile terminal device;
A vehicle-side receiving unit for receiving signals;
The in-vehicle side control unit that transmits the request signal to the in-vehicle side transmission unit and determines the answer signal transmitted from the mobile terminal device and received by the in-vehicle side reception unit;
With
The vehicle-mounted side control unit
As the request signal, a signal including a plurality of authentication signals set to have different received signal strengths is transmitted to the in-vehicle side transmission unit,
The in-vehicle side receiving unit is
The mobile terminal device received after the reception sensitivity characteristic of the mobile terminal device is adjusted based on the strength value of the authentication signal received by the mobile terminal device, and the reception sensitivity characteristic of the mobile terminal device is adjusted Receiving a signal including the result of the determination of a plurality of authentication signals,
The vehicle-mounted side control unit
Based on the determination results of the plurality of authentication signals included in the signal received by the in-vehicle side receiving unit, the signal received by the mobile terminal device from the answer signal received by the in-vehicle side receiving unit is To determine whether the request signal is
In-vehicle device. - 車載装置からのリクエスト信号を受信する携帯側受信部と、
信号を送信する携帯側送信部と、
前記携帯側受信部が前記リクエスト信号を受信するのに応じて、前記リクエスト信号に対するアンサー信号を前記車載装置へ送信するように前記携帯側送信部を制御する携帯側制御部と、
を備え、
前記携帯側受信部は、
制御により受信感度特性の調整が可能であり、前記車載装置から送信された前記リクエスト信号を受信し、
前記携帯側制御部は、
前記携帯側受信部によって受信した認証用信号の強度値に基づいて前記携帯側受信部の受信感度特性を指示して、前記指示された受信感度特性に前記携帯側受信部の受信感度特性が調整された後に受信した複数の認証用信号を判別する、
携帯端末装置。 A mobile-side receiver that receives a request signal from the in-vehicle device;
A portable transmitter that transmits a signal;
A portable side control unit that controls the portable side transmission unit to transmit an answer signal to the request signal to the in-vehicle device in response to the portable side reception unit receiving the request signal;
With
The mobile-side receiver is
It is possible to adjust the reception sensitivity characteristic by control, receive the request signal transmitted from the in-vehicle device,
The portable side control unit is
Based on the strength value of the authentication signal received by the portable-side receiver, the reception sensitivity characteristic of the portable-side receiver is instructed, and the reception sensitivity characteristic of the portable-side receiver is adjusted to the instructed reception sensitivity characteristic Discriminating a plurality of authentication signals received after
Mobile terminal device.
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JP2012052361A (en) * | 2010-09-02 | 2012-03-15 | Denso Corp | Control system |
JP2012182703A (en) * | 2011-03-02 | 2012-09-20 | Seiko Epson Corp | Gain adjusting device and receiver unit |
US20140132391A1 (en) * | 2012-11-14 | 2014-05-15 | Infineon Technologies Ag | Relay Attack Prevention Using RSSIPPLX |
JP2014139752A (en) * | 2013-01-21 | 2014-07-31 | Omron Automotive Electronics Co Ltd | Communication system and communication device |
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JP2012052361A (en) * | 2010-09-02 | 2012-03-15 | Denso Corp | Control system |
JP2012182703A (en) * | 2011-03-02 | 2012-09-20 | Seiko Epson Corp | Gain adjusting device and receiver unit |
US20140132391A1 (en) * | 2012-11-14 | 2014-05-15 | Infineon Technologies Ag | Relay Attack Prevention Using RSSIPPLX |
JP2014139752A (en) * | 2013-01-21 | 2014-07-31 | Omron Automotive Electronics Co Ltd | Communication system and communication device |
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