JP6284503B2 - In-vehicle device control system - Google Patents

Description

  The present invention relates to a vehicle-mounted device control system that controls vehicle-mounted devices based on radio signals transmitted and received between a vehicle-mounted control device mounted on a vehicle and a portable device carried by a user. It relates to crime prevention technology.

  Control of in-vehicle devices such as door locking / unlocking and engine starting is executed based on radio signals transmitted / received between the in-vehicle control device mounted on the vehicle and the portable device carried by the user. There is an in-vehicle device control system. There are roughly three types of communication methods between the in-vehicle control device and the portable device: a polling method, a passive entry method, and a keyless entry method.

  In the polling method, the in-vehicle control device transmits a response request signal at a predetermined cycle regardless of the position of the portable device. When the portable device receives this response request signal, it returns a response signal including the ID code to the in-vehicle control device. In the passive entry method, for example, when the user approaches or contacts the door knob, the request switch is turned on and a response request signal is transmitted from the in-vehicle control device to the portable device. When the portable device receives this response request signal, it returns a response signal including the ID code to the in-vehicle control device. In the keyless entry method, a response request signal is not transmitted from the in-vehicle control device to the portable device, and when the user operates the portable device, an operation signal including an ID code is transmitted from the portable device to the in-vehicle control device. In any case, when the response signal or operation signal from the portable device is received, the in-vehicle control device collates the ID code, and when the collation is established, permits the door lock / unlock of the vehicle or the engine. Or allow to start.

  However, in the case of the polling method or the passive entry method, it is as if a distant portable device is in the vicinity of the vehicle using a repeater that can relay a response request signal from the in-vehicle control device or a response signal from the portable device. In some cases, an unauthorized communication act disguised as An unauthorized communication act using this repeater is called a relay attack. Due to the relay attack, a malicious third party who is not the owner of the vehicle may unlock the vehicle door or start the engine to commit a crime such as theft.

  Therefore, as a security measure against relay attack, in Patent Document 1, a specified frequency list in which a plurality of frequencies for returning a response signal are randomly selected is included in the response request signal and transmitted from the in-vehicle wireless device to the wireless key. Thereafter, the in-vehicle wireless device waits for a response signal transmitted from the portable device according to the specified frequency list, and measures the RSSI value (reception signal strength) of the response signal every time the response signal is received. When the reception waiting process is completed according to the specified frequency list, the in-vehicle wireless device compares the threshold value set for each frequency with the RSSI value of each response signal, and the portable device is within the protection device vicinity area based on the comparison result. It is determined whether or not there is. And if a vehicle-mounted radio | wireless machine determines with a portable machine being in a protection apparatus vicinity area, it will unlock the door of a vehicle.

  Also, in Patent Document 2, if the in-vehicle device transmits an LF signal (response request signal) at the first frequency and does not receive a response signal from the portable device, information to change to the second frequency is transmitted to the portable device. Transmit by radio wave, and then transmit the LF signal at the second frequency. If no response signal is received from the portable device, the information to be changed to the third frequency is transmitted to the portable device by UHF radio waves, and then the LF signal is transmitted at the third frequency.

JP 2008-240315 A JP 2008-174960 A

  The subject of this invention is improving the crime prevention property with respect to a relay attack, avoiding complication of communication processing.

An in-vehicle device control system according to the present invention includes an in-vehicle control device that is mounted on a vehicle and transmits a response request signal, and a portable device that is carried by a user and transmits a response signal in response to receiving the response request signal from the in-vehicle control device. It consists of. The in-vehicle control device executes control of the in-vehicle device based on the response signal received from the portable device. The in-vehicle control device receives an in-vehicle first frequency transmission unit that transmits a response request signal of the first frequency, an in-vehicle second frequency transmission unit that transmits a response request signal of the second frequency, and a response signal of the second frequency. The vehicle-mounted 2nd frequency receiving part and the vehicle-mounted 3rd frequency receiving part which receives the response signal of a 3rd frequency are provided. The portable device transmits a response signal of the second frequency, a portable device first frequency reception unit that receives the response request signal of the first frequency, a portable device second frequency reception unit that receives the response request signal of the second frequency, A portable device second frequency transmitter, and a portable device third frequency transmitter that transmits a response signal of the third frequency. The in-vehicle control device transmits the response request signal of the first frequency by the in- vehicle first frequency transmission unit, then transmits the response request signal of the second frequency by the in-vehicle second frequency transmission unit, and the in-vehicle first frequency The transmission part transmits a response request signal of the first frequency after the transmission. When the portable device receives the response request signal of the first frequency by the portable device first frequency reception unit and then receives the response request signal of the second frequency by the portable device second frequency reception unit, the portable device second frequency When the transmission unit transmits a response signal of the second frequency, and the portable device first frequency reception unit receives the response signal of the first frequency after the transmission, the portable device transmits the response signal of the third frequency by the third frequency transmission unit. To do. The in-vehicle control device receives the response signal of the second frequency by the in-vehicle second frequency reception unit and receives the response signal of the third frequency by the in-vehicle third frequency reception unit, and then receives the response signal of the second frequency and the second frequency response signal. Based on the response signal of 3 frequencies, control of in-vehicle equipment is executed.

  According to the above, the response request signals of the first frequency and the second frequency and the response signals of the second frequency and the third frequency are transmitted and received between the in-vehicle control device and the portable device, and the in-vehicle control device is transmitted from the portable device. Based on each received response signal, control of the in-vehicle device is executed. On the other hand, the repeater used in the relay attack does not have a configuration for transmitting and receiving the response request signals of the first frequency and the second frequency, and the response signals of the second frequency and the third frequency. The control of the in-vehicle device is not executed by mistake. Therefore, crime prevention against relay attack can be improved. Moreover, since the structure for transmitting / receiving the response request signal of the 1st frequency and the 2nd frequency, and the response signal of the 2nd frequency and the 3rd frequency is provided in the vehicle-mounted control apparatus and the portable device, It is not necessary to notify the response request signal transmitted from one of the portable devices or the frequency of the response signal to the other in advance, and it is possible to avoid complication of communication processing.

  In the present invention, the portable device includes a response request signal of the first frequency received by the first frequency receiver of the portable device and a response request signal of the second frequency received by the second frequency receiver of the portable device, respectively. You may provide the portable device normal signal determination part which determines whether it is a regular response signal. In this case, when the portable device normal signal determination unit determines that the second frequency response request signal is a normal response request signal, the portable device second frequency transmission unit transmits the second frequency response signal, When the portable device normal signal determination unit determines that the response request signal of the first frequency that follows is a normal response request signal, the portable device third frequency transmission unit transmits a response signal of the third frequency.

  In the present invention, the portable device always starts the portable device first frequency receiving unit and always stops the portable device second frequency receiving unit, and the first received by the portable device first frequency receiving unit. When the portable device normal signal determination unit determines that the one-frequency response request signal or the subsequent first-frequency response request signal is a normal response request signal, the mobile device normal signal determination unit prepares for reception of the second frequency response request signal. The portable device second frequency receiving unit may be activated.

  In the present invention, the in-vehicle control device is configured such that the response signal of the second frequency received by the in-vehicle second frequency receiving unit and the response signal of the third frequency received by the in-vehicle third frequency receiving unit are normal responses. You may provide the vehicle-mounted regular signal determination part which determines whether it is a signal. When the response signal of the second frequency or the response signal of the third frequency is not received, or when the response signal of the second frequency and the response signal of the third frequency are received, the response signal of the second frequency and the response of the third frequency When the vehicle-mounted normal signal determination unit determines that at least one of the signals is not a normal response signal, the control of the vehicle-mounted device is not executed. On the other hand, a vehicle-mounted normal signal determination is made that the second frequency response signal and the third frequency response signal are received, and that the second frequency response signal and the third frequency response signal are both normal response signals. If determined by the unit, control of the in-vehicle device is executed.

Further, in the present invention, the in-vehicle device includes a first in-vehicle device that locks and unlocks a door of the vehicle, and a second in-vehicle device that starts an engine of the vehicle or drives an air conditioner, and the second frequency is 2 The same frequency as used when transmitting an operation signal for operating the in-vehicle device from the portable device, and the third frequency is when transmitting an operation signal for operating the first in-vehicle device from the portable device. It may be the same as the frequency used. Further, the response request signal of the first frequency after the start may be a signal for detecting the position of the portable device, and the in-vehicle control device transmits the response request signal at a predetermined cycle within a predetermined time. Also good.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the crime prevention property with respect to a relay attack, avoiding complication of communication processing.

It is a block diagram of the vehicle equipment control system by embodiment of this invention. It is a top view of the vehicle with which the vehicle equipment control system of FIG. 1 is applied. It is the flowchart which showed operation | movement of the vehicle-mounted control apparatus of FIG. It is the flowchart which showed operation | movement of the portable device of FIG. It is the figure which showed the communication order of the vehicle-mounted control apparatus of FIG. 1, and a portable machine. It is the figure which showed the communication state of a vehicle-mounted control apparatus and a portable device in case the portable device of FIG. It is the figure which showed the communication state of a vehicle-mounted control apparatus and a portable device when the portable device of FIG. 1 is not in a communicable area with respect to a vehicle. It is the figure which showed the communication state of the vehicle-mounted control apparatus, a portable device, and a repeater when the portable device of FIG. It is the figure which showed the communication order of the vehicle-mounted control apparatus and portable machine by other embodiment of this invention. It is the figure which showed the communication order of the vehicle-mounted control apparatus and portable machine by other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  First, the configuration of the in-vehicle device control system 100 according to the embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a configuration diagram of the in-vehicle device control system 100. FIG. 2 is a plan view of the vehicle 30 to which the in-vehicle device control system 100 is applied.

  As shown in FIG. 1, the in-vehicle device control system 100 includes an in-vehicle control device 10 and a portable device 20. In the in-vehicle device control system 100, control of the in-vehicle device mounted on the vehicle 30 (FIG. 2) is executed based on a radio signal transmitted and received between the in-vehicle control device 10 and the portable device 20.

  In the present embodiment, the control of the in-vehicle device means locking / unlocking of the door of the vehicle 30, which is a four-wheeled vehicle, starting of an engine, or driving of an air conditioner (air conditioner). The vehicle 30 is provided with a plurality of doors that can be locked and unlocked. The air conditioner is an example of the “air conditioner” according to the present invention. The in-vehicle device control system 100 has a passive entry function and a keyless entry function.

  The in-vehicle control device 10, the in-vehicle operation unit 5, the door lock device 6, the engine device 7, and the air conditioner device 8 shown in FIG. 1 are mounted on a vehicle 30. The portable device 20 is carried by a user of the vehicle 30.

  The in-vehicle control device 10 includes an in-vehicle first frequency transmission unit 1, a first frequency antenna 1t, an in-vehicle second frequency transmission unit 2a, a second frequency antenna 2t, an in-vehicle second frequency reception unit 2b, and an in-vehicle third frequency reception unit. 3, a third frequency antenna 3 t, and a control unit 4.

  The control unit 4 includes a CPU and a memory. The control unit 4 includes a vehicle-mounted regular signal determination unit 4a.

  The on-vehicle first frequency transmission unit 1 includes a circuit or an IC that transmits an LF (Low Frequency) signal of a first frequency. The on-vehicle first frequency transmission unit 1 transmits an LF signal of the first frequency to the portable device 20 via the first frequency antenna 1t.

  The in-vehicle second frequency transmission unit 2a includes a circuit that transmits a second frequency RF (Radio Frequency) signal. The in-vehicle second frequency transmission unit 2a transmits an RF signal having the second frequency to the portable device 20 via the second frequency antenna 2t.

  The in-vehicle second frequency receiving unit 2b includes a circuit that receives an RF signal having the second frequency. The in-vehicle second frequency receiving unit 2b receives the second frequency RF signal transmitted from the portable device 20 via the second frequency antenna 2t.

  As another example, the in-vehicle second frequency transmission unit 2a and the in-vehicle second frequency reception unit 2b may be configured by a one-chip IC that transmits and receives an RF signal of the second frequency.

  The on-vehicle third frequency receiving unit 3 includes a circuit that receives an RF signal having a third frequency. The on-vehicle third frequency receiving unit 3 receives the third frequency RF signal transmitted from the portable device 20 via the third frequency antenna 3t.

  A plurality of first frequency antennas 1t and second frequency antennas 2t are provided so as to be distributed inside and outside the vehicle 30. For this reason, the LF signals transmitted from the antennas 1t and 2t are distributed in the vicinity of the vehicle 30 (outside the passenger compartment) and in the passenger compartment.

  The first frequency LF signal transmitted by the in-vehicle first frequency transmission unit 1 and the second frequency RF signal transmitted by the in-vehicle second frequency transmission unit 2a include a response request signal for the portable device 20, respectively. . The second frequency RF signal received by the in-vehicle second frequency receiving unit 2b and the third frequency RF signal received by the in-vehicle third frequency receiving unit 3 include a response signal from the portable device 20, respectively. .

  The control unit 4 controls the transmission units 1, 2 a and the reception units 2 b, 3 to perform wireless communication with the portable device 20 and transmit / receive signals and information to / from the portable device 20. The vehicle-mounted regular signal determination unit 4a of the control unit 4 includes a response signal of the second frequency received by the vehicle-mounted second frequency reception unit 2b and a response signal of the third frequency received by the vehicle-mounted third frequency reception unit 3, respectively. It is determined whether the response signal is normal.

  The in-vehicle control device 10 is connected to the in-vehicle operation unit 5, the door lock device 6, the engine device 7, and the air conditioner device 8.

  The in-vehicle operation unit 5 includes a passive request SW (switch) 5a, an engine SW (switch) 5b, and an air conditioner SW (switch) 5c.

  Passive request SW5a is installed in the doorknob in the outer surface of the door of vehicle 30, and is operated in order to lock and unlock the door of vehicle 30. The engine SW5b is installed in the vicinity of the driver's seat in the passenger compartment of the vehicle 30, and is operated to start and stop the engine. The air conditioner SW5c is installed in the vicinity of the driver's seat in the passenger compartment of the vehicle 30, and is operated to drive / stop the air conditioner of the vehicle 30.

  When the user operates the passive request SW 5a, the engine SW 5b, or the air conditioner SW 5c, an operation signal corresponding to the operation is transmitted to the control unit 4 of the in-vehicle control device 10.

  The door lock device 6 includes a mechanism for locking and unlocking each door of the vehicle 30 and a drive circuit for the mechanism. The engine device 7 includes a starter motor for starting the engine of the vehicle 30 and a drive circuit for the starter motor. The air conditioner 8 includes a drive circuit for driving and stopping the air conditioner of the vehicle 30. The door lock device 6 is an example of the “first vehicle-mounted device” in the present invention, and the engine device 7 and the air conditioner device 8 are examples of the “second vehicle-mounted device” in the present invention.

  The portable device 20 includes an FOB key. The portable device 20 includes a portable device first frequency receiver 21, a first frequency antenna 21t, a portable device second frequency receiver 22a, a second frequency antenna 22t, a portable device second frequency transmitter 22b, and a portable device third. A frequency transmission unit 23, a third frequency antenna 23t, a control unit 24, and a portable device operation unit 25 are provided.

  The control unit 24 includes a CPU and a memory. The control unit 24 includes a portable device normal signal determination unit 24a.

  The portable device first frequency receiving unit 21 includes a circuit that receives an LF signal having a first frequency. The portable device first frequency receiving unit 21 receives the LF signal of the first frequency transmitted from the in-vehicle control device 10 via the first frequency antenna 21t.

  The portable device second frequency receiving unit 22a includes a circuit that receives an RF signal having the second frequency. The portable device second frequency reception unit 22a receives the RF signal of the second frequency transmitted from the in-vehicle control device 10 via the second frequency antenna 22t.

  The portable device second frequency transmission unit 22b includes a circuit that transmits an RF signal having a second frequency. The portable device second frequency transmission unit 22b transmits the RF signal of the second frequency to the in-vehicle control device 10 via the second frequency antenna 22t.

  The portable device third frequency transmission unit 23 includes a circuit or an IC that transmits an RF signal having a third frequency. The portable device third frequency transmission unit 23 transmits an RF signal of the third frequency to the in-vehicle control device 10 via the third frequency antenna 23t.

  As another example, the portable device second frequency receiving unit 22a and the portable device second frequency transmitting unit 22b may be configured by a one-chip IC that transmits and receives an RF signal of the second frequency. Moreover, you may comprise the portable device 1st frequency receiving part 21, the portable device 3rd frequency transmission part 23, and the control part 24 by 1-chip IC.

  As described above, the in-vehicle controller 10 includes the LF signal of the first frequency received by the portable device first frequency receiver 21 and the RF signal of the second frequency received by the portable device second frequency receiver 22a. Response request signals are included. The third frequency RF signal transmitted by the portable device third frequency transmission unit 23 includes a response signal transmitted to the in-vehicle control device 10 in response to the response request signal of the first frequency. Further, the second frequency RF signal transmitted by the portable device second frequency transmission unit 22b includes a response signal transmitted to the in-vehicle control device 10 in response to the response request signal of the second frequency. The response request signal of the first frequency and the response signal of the third frequency are transmitted and received also by the vehicle-mounted control device and the portable device of the conventional passive entry system.

  The control unit 24 controls the receiving units 21 and 22a and the transmitting units 22b and 23 to wirelessly communicate with the in-vehicle control device 10, and transmits and receives signals and information to and from the in-vehicle control device 10.

  The portable device normal signal determination unit 24a includes a response request signal having the first frequency received by the portable device first frequency receiving unit 21 and a response request signal having the second frequency received by the portable device second frequency receiving unit 22a. It is determined whether each is a normal response request signal.

  The portable device operation unit 25 includes a door SW (switch) 25a, an engine SW (switch) 25b, and an air conditioner SW (switch) 25c.

  The door SW 25a is operated to lock and unlock the door of the vehicle 30. The engine SW25b is operated to start and stop the engine of the vehicle 30. The air conditioner SW25c is operated to drive / stop the air conditioner of the vehicle 30.

  When the user operates the door SW 25a, the control unit 24 generates an operation signal corresponding to the operation, and transmits the operation signal to the in-vehicle control device 10 by the portable device third frequency transmission unit 23 using the third frequency carrier wave. . When the operation signal of the third frequency is received by the in-vehicle third frequency reception unit 3, the control unit 4 controls the door lock device 6 based on the operation signal, and locks and unlocks the door of the vehicle 30. That is, the operation signal for operating the door lock device 6 and the above-described third frequency response signal are the same third frequency RF signal.

  When the user operates the engine SW 25b or the air conditioner SW 25c, the control unit 24 generates an operation signal corresponding to the operation, and the vehicle-mounted control device uses the second frequency transmission unit 22b to transmit the operation signal to the carrier of the second frequency. 10 to send. When the operation signal of the second frequency is received by the in-vehicle second frequency receiving unit 2b, the control unit 4 controls the engine device 7 or the air conditioner device 8 based on the operation signal, and starts the engine of the vehicle 30 or Drive the air conditioner. That is, the operation signal for operating the engine device 7 or the air conditioner device 8 and the above-described response signal of the second frequency are the same RF signal of the second frequency.

  The in-vehicle control device 10 and the portable device 20 can communicate with each other within a communicable region R indicated by a broken line in FIG.

  When the user carrying the portable device 20 operates the passive request SW 5a in the communicable region R, the control unit 4 of the in-vehicle control device 10 transmits a response request signal to each portable unit 20 by the transmission units 1 and 2a. Then, each of the receiving units 2b and 3 receives a response signal from the portable device 20 (passive entry method). And the control part 4 determines whether the response signal received from the portable device 20 is a regular response signal by the vehicle-mounted regular signal determination part 4a. At this time, the vehicle-mounted regular signal determination unit 4a performs determination based on, for example, the ID code of the portable device 20 included in the response signal, the response request signal or the RSSI value (reception signal strength) of the response signal, or the like. When it is determined that the received response signal is a normal response signal, the control unit 4 controls the door lock device 6 to lock and unlock each door of the vehicle 30.

  When the user carrying the portable device 20 operates the door SW 25a of the portable device operation unit 25 within the communicable region R, an operation signal corresponding to the operation is sent from the portable device third frequency transmission unit 23 to the vehicle. It is transmitted to the control device 10 (keyless entry method). When the operation signal is received by the in-vehicle third frequency receiving unit 3, the control unit 4 determines whether the operation signal is a normal operation signal by the in-vehicle normal signal determination unit 4a. At this time, the vehicle-mounted regular signal determination unit 4a performs determination based on, for example, the ID code of the portable device 20 included in the operation signal. When it is determined that the received operation signal is a normal response signal, the control unit 4 controls the door lock device 6 to lock and unlock the door of the vehicle 30.

  When the user carrying the portable device 20 operates the engine SW 5b of the in-vehicle operation unit 5 within the communicable region R, the control unit 4 causes the portable device 20 by the in-vehicle second frequency transmission unit 2a and the reception unit 2b. The portable device second frequency receiving unit 22a and the transmitting unit 22b communicate with each other to collate the ID code stored in advance with the ID code of the portable device 20. And if collation of both ID codes is successful, the control part 4 will control the engine apparatus 7, and will start the engine of the vehicle 30. FIG.

  Further, when the user carrying the portable device 20 operates the engine SW 25b or the air conditioner SW 25c of the portable device operation unit 25 within the communicable region R, an operation signal corresponding to the operation is sent from the portable device second frequency transmission unit 22b. It is transmitted to the vehicle control device 10. When the operation signal is received by the in-vehicle second frequency receiving unit 2b, the control unit 4 determines whether or not the operation signal is a normal operation signal by the in-vehicle normal signal determination unit 4a. At this time, if the vehicle-mounted normal signal determination unit 4a determines that the normal operation signal is based on the ID code of the portable device 20 included in the operation signal, the control unit 4 controls the engine device 7. Then, the engine of the vehicle 30 is started or the air conditioner device 8 is controlled to drive the air conditioner of the vehicle 30.

  As a communication method between the vehicle control device 10 and the portable device 20, a polling method may be employed instead of the passive entry method (the same applies to other embodiments described later).

  By the way, the repeaters 51 and 52 (FIG. 8 to be described later) used in the relay attack are signals between the in-vehicle control device 10 and the portable device 20 even when the portable device 20 is far away from the vehicle 30. It has a function to relay the transmission and reception. For this reason, the distant portable device 20 is disguised as if it is in the vicinity of the vehicle 30, and an unauthorized communication action is performed.

  Next, operations of the in-vehicle control device 10 and the portable device 20 will be described with reference to FIGS.

  FIG. 3 is a flowchart showing the operation of the in-vehicle control device 10. FIG. 4 is a flowchart showing the operation of the portable device 20. FIG. 5 is a diagram illustrating a communication order between the in-vehicle control device 10 and the portable device 20.

  In this example, it is assumed that the portable device 20 is outside the passenger compartment of the vehicle 30, the engine and the air conditioner of the vehicle 30 are in a stopped state, and the door is in a locked state (other embodiments described later are also included). The same). In addition, the transmission units 1 and 2a and the reception units 2b and 3 of the in-vehicle control device 10 are always activated. Further, the transmitters 22b and 23 of the portable device 20 and the portable device first frequency receiving unit 21 are always in an activated state, and the portable device second frequency receiving unit 22a is always in a stopped state.

  For example, in the case of the passive entry method, when the passive request SW 5 a is operated by the user, the control unit 4 of the vehicle control device 10 sends a response request signal of the first frequency α (KHz) that has been started by the vehicle-mounted first frequency transmission unit 1. (LF signal) is transmitted (step S1 in FIG. 3, (1) in FIG. 5). Next, the control part 4 transmits the response request signal (RF signal) of 2nd frequency (beta) (MHz) by the vehicle-mounted 2nd frequency transmission part 2a (step S2 of FIG. 3, (2) of FIG. 5). The second frequency β is larger than the first frequency α (α <β).

  FIG. 6 is a diagram illustrating a communication state between the in-vehicle control device 10 and the portable device 20 when the portable device 20 is in the communicable region R with respect to the vehicle 30. As illustrated in FIG. 6, the vehicle-mounted second frequency transmission unit 2 a of the vehicle-mounted control device 10 and the mobile phone are determined based on the reach distance of the LF signal transmitted by the vehicle-mounted first frequency transmission unit 1 of the vehicle-mounted control device 10 with the vehicle 30 as a reference. The reach distance of each RF signal transmitted by the portable device second frequency transmission unit 22a and the portable device third frequency transmission unit 23 of the machine 20 is longer. For this reason, the communicable region R is within the range from the vehicle 30 to the reach distance of the LF signal.

  When the portable device 20 is in the communicable region R (FIG. 6), the portable device first frequency receiving unit 21 receives the response request signal of the first frequency α transmitted from the in-vehicle first frequency transmitting unit 1. Receive (step S21 in FIG. 4: YES). Then, the control unit 24 determines whether or not the response request signal of the first frequency α is a normal response request signal by the portable device normal signal determination unit 24a (step S22 in FIG. 4).

  At this time, the portable device normal signal determination unit 24a measures, for example, the RSSI value (reception signal strength) of the response request signal of the first first frequency α received by the portable device first frequency receiving unit 21, and the RSSI value Is equal to or greater than a predetermined threshold value, it is determined that the first response request signal of the first frequency α is a normal response request signal. Alternatively, the portable device normal signal determination unit 24a, for example, collates the ID code of the in-vehicle control device 10 included in the received response request signal of the first frequency α with the ID code of the portable device 20 stored in advance, If the two ID codes match, it is determined that the first response request signal of the first frequency α is a normal response request signal. Further, for example, when the RSSI value is equal to or greater than a predetermined threshold and the ID code matches as described above, it may be determined that the response request signal of the first frequency α is a regular response request signal. .

  When the portable device normal signal determination unit 24a determines that the first response request signal of the first frequency α is a normal response request signal (step S22 in FIG. 4: YES), the control unit 24 selects the second frequency β. In preparation for reception of the response request signal, the portable device second frequency receiving unit 22a is activated (step S23 in FIG. 4).

  And after starting the portable device 2nd frequency receiving part 22a until predetermined time passes (step S25 of FIG. 4: NO), the portable device 2nd frequency receiving part 22a is from the vehicle-mounted 2nd frequency transmitting part 2a. Assume that the transmitted response request signal of the second frequency β is received (step S24 in FIG. 4: YES). In this case, the control unit 24 determines whether or not the response request signal of the second frequency β is a normal response request signal by the portable device normal signal determination unit 24a (step S26 in FIG. 4).

  At this time, the portable device normal signal determination unit 24a measures, for example, the RSSI value of the response request signal of the second frequency β received by the portable device second frequency receiving unit 22a, and the RSSI value is equal to or greater than a predetermined threshold value. For example, it is determined that the received response request signal of the second frequency β is a normal response request signal. Alternatively, the portable device normal signal determination unit 24a collates, for example, the ID code of the in-vehicle control device 10 included in the received response request signal of the second frequency β with the ID code of the portable device 20 stored in advance, If both ID codes match, it is determined that the received response request signal of the second frequency β is a normal response request signal. Further, for example, when the RSSI value is equal to or greater than a predetermined threshold and the ID codes match as described above, it may be determined that the received response request signal of the second frequency β is a regular response request signal. .

  When the portable device normal signal determination unit 24a determines that the response request signal of the second frequency β is a normal response request signal (step S26 in FIG. 4: YES), the control unit 24 sets the portable device second frequency transmission unit. The response signal of the second frequency β is transmitted by 22b (step S27 in FIG. 4, (3) in FIG. 5). At this time, for example, the control unit 24 uses the ID code of the portable device 20 and the RSSI value of the response request signal of the second frequency β received earlier (step S24 in FIG. 4) as the response signal of the second frequency β. Include in

  Moreover, the control part 24 stops the portable device 2nd frequency receiving part 22a (step S28 of FIG. 4). The stop of the portable device second frequency receiving unit 22a may be before the response signal of the second frequency β is transmitted (before step S27 in FIG. 4), or the response request signal of the second frequency β May be immediately after (step S24 in FIG. 4: immediately after YES).

  In the vehicle-mounted control device 10, the vehicle-mounted second frequency receiving unit 2b is transmitted until a predetermined time elapses after the response request signal of the second frequency β is transmitted (step S2 in FIG. 3) (step S4: NO in FIG. 3). Waits to receive a response signal of the second frequency β transmitted from the portable device second frequency transmitter 22b (step S3 in FIG. 3). And when this response signal is received (step S3 of FIG. 3: YES), the control part 4 will determine whether the response signal of the 2nd frequency (beta) is a regular response signal by the vehicle-mounted regular signal determination part 4a. (Step S5 in FIG. 3).

  At this time, the vehicle-mounted regular signal determination unit 4a, for example, collates the ID code of the portable device 20 included in the response signal of the second frequency β with the ID code of the vehicle-mounted control device 10 stored in advance, and both ID codes If the two match, it is determined that the response signal of the second frequency β is a normal response signal. Alternatively, in addition to the condition that the ID codes match, the condition that the RSSI value included in the response signal of the second frequency β (the RSSI value of the response request signal of the second frequency β) is equal to or greater than a predetermined threshold is also satisfied. The response signal of the second frequency β may be determined to be a normal response signal.

  Alternatively, the in-vehicle regular signal determination unit 4a measures the RSSI value of the response signal of the second frequency β received by the in-vehicle second frequency reception unit 2b, and the RSSI value is equal to or greater than a predetermined threshold. You may add to the conditions which determine that the response signal of frequency (beta) is a regular response signal.

  When the vehicle-mounted normal signal determination unit 4a determines that the response signal of the second frequency β is a normal response signal (step S5 in FIG. 3: YES), the control unit 4 uses the vehicle-mounted first frequency transmission unit 1 to start A response request signal of the first frequency α is transmitted (step S6 in FIG. 3). At this time, in order to detect the position of the portable device 20, the control unit 4 determines a response request signal of the first frequency α that is delayed from a plurality of first frequency antennas 1 t provided outside and inside the vehicle interior within a predetermined time. (4 in FIG. 5). Moreover, the control part 4 includes the identification information which shows the 1st frequency antenna 1t of a transmission source in the response request signal of each 2nd frequency (beta).

  In the portable device 20, the portable device first frequency receiving unit 21 receives the response signal of the second frequency β (step S <b> 27 in FIG. 4) until a predetermined time elapses (step S <b> 30 in FIG. 4: NO). Waiting to receive a response request signal of the first frequency α transmitted later from the in-vehicle first frequency transmitter 1 (step S29 in FIG. 4). When this response request signal is received (step S29 in FIG. 4: YES), the control unit 24 uses the portable device normal signal determination unit 24a to make the subsequent response request signal of the first frequency α a normal response request signal. It is determined whether or not there is (step S31 in FIG. 4).

  At this time, the portable device normal signal determination unit 24a determines whether or not all subsequent response request signals of the first frequency α received by the portable device first frequency reception unit 21 are normal response request signals. To do. This determination method is the same as the method in step S22 described above.

  Then, when the portable device normal signal determination unit 24a determines that the response request signal of the first frequency α that follows is a normal response request signal (step S31 in FIG. 4: YES), the control unit 24 determines that the portable device first A response signal of the third frequency γ (MHz) is transmitted by the three-frequency transmitter 23 (step S32 in FIG. 4, (5) in FIG. 5). At this time, the control unit 24, for example, the ID code of the portable device 20, the RSSI value of the response request signal of the subsequent first frequency α received earlier (step S29), and the response request signal of the subsequent first frequency α. Is included in the response signal of the third frequency γ. The third frequency γ is a value larger than the first frequency α and smaller than the second frequency β (α <γ <β).

  Thereafter, the in-vehicle control device 10 transmits the response request signal of the first frequency α that is delayed (step S6 in FIG. 3) until the predetermined time elapses (step S8 in FIG. 3: NO). It waits for the third frequency receiver 3 to receive a response signal of the third frequency γ transmitted from the portable device third frequency transmitter 23 (step S7 in FIG. 3). And when this response signal is received (step S7 of FIG. 3: YES), the control part 4 will determine whether the response signal of the 3rd frequency (gamma) is a regular response signal by the vehicle-mounted regular signal determination part 4a. (Step S9 in FIG. 3).

  At this time, for example, the vehicle-mounted regular signal determination unit 4a collates the ID code of the portable device 20 included in the response signal of the third frequency γ with the ID code of the vehicle-mounted control device 10, and if both ID codes match. The response signal of the third frequency γ is determined to be a normal response signal. Alternatively, if the RSSI value included in the response signal of the third frequency γ (the RSSI value of the response request signal of the subsequent first frequency α) is equal to or greater than a predetermined threshold, the response signal of the third frequency γ is a normal response signal. It is determined that Alternatively, the RSSI value of the response signal of the third frequency γ received by the in-vehicle third frequency receiving unit 3 is measured. If the RSSI value is equal to or greater than a predetermined threshold, the response signal of the third frequency γ is a normal response signal. It is determined that

  If the vehicle-mounted normal signal determination unit 4a determines that the response signal of the third frequency γ is a normal response signal (step S9 in FIG. 3: YES), the control unit 4 determines whether or not the vehicle-mounted device can be controlled. Is determined (step S10 in FIG. 3). In this example, the door lock device 6 is controlled so as to unlock the door of the vehicle 30 as control of the in-vehicle device.

  For the determination in step S10 in FIG. 3, the control unit 4 confirms the position of the portable device 20, the state of the door of the vehicle 30, or the state of the door lock device 6, for example. Specifically, the control unit 4 includes the RSSI value of the response request signal of the subsequent first frequency α included in the response signal of the third frequency γ and the first frequency antenna that is the transmission source of the response request signal. Based on the identification information of 1t, it is confirmed whether the portable device 20 is outside the vehicle compartment or inside the vehicle compartment. Moreover, the control part 4 confirms whether the door is in a locked state based on the output of the door lock device 6, or confirms whether the door lock device 6 is out of order.

  Then, for example, when the control unit 4 confirms that the portable device 20 is outside the passenger compartment, the door of the vehicle 30 is locked, and / or that the door lock device 6 is not broken, In this case, the control unit 4 performs control of the in-vehicle device (door lock device 6) (step S11 in FIG. 3). Thereby, the door lock device 6 unlocks 30 doors of the vehicle.

  On the other hand, when the control unit 4 confirms, for example, that the portable device 20 is not outside the passenger compartment, the door of the vehicle 30 is not locked, and / or that the door lock device 6 is out of order, In this case, since the control unit 4 does not execute the control of the in-vehicle device, the door lock device 6 unlocks the 30 doors of the vehicle. There is nothing.

  FIG. 7 shows the communication between the in-vehicle control device 10 and the portable device 20 when the portable device 20 is not in the communicable region R with respect to the vehicle 30 and the repeater used in the relay attack is not in the communicable region R. It is the figure which showed the state. In this case, even if the first response request signal of the first frequency α is transmitted by the on-vehicle first frequency transmission unit 1 of the in-vehicle control device 10 (step S1 in FIG. 3), the response request signal of the first frequency α is portable. It is not received by the machine 20 (step S21 in FIG. 4: NO). Further, since the portable device second frequency receiving unit 22a is not activated, even if a response request signal of the second frequency β is transmitted by the in-vehicle second frequency transmitting unit 2a (step S2 in FIG. 3), the second frequency β of the second frequency β The response request signal is not received by the portable device 20. Therefore, the response signal of the second frequency β is not transmitted from the portable device 20, and the predetermined time elapses without the response signal of the second frequency being received by the in-vehicle control device 10 (step S3: NO in FIG. 3). (Step S4 in FIG. 3: YES). In this case, since the control unit 4 does not control the in-vehicle device, the door lock device 6 does not unlock the 30 doors of the vehicle.

  FIG. 8 is a diagram illustrating a communication state of the in-vehicle control device 10, the portable device 20, and the repeaters 51 and 52 when the portable device 20 is relay-attacked without being in the communicable region R with respect to the vehicle 30. It is. In FIG. 8, one of the repeaters 51 and 52 used in the relay attack is in the communicable region R. The other repeater 52 is not in the communicable region R, but is in a position where it can communicate with the one repeater 51 and the portable device 20. For this reason, when the first response request signal (LF signal) of the first frequency α is transmitted by the in-vehicle first frequency transmission unit 1 of the in-vehicle control device 10 (step S1 in FIG. 3), one repeater 51 is There is a possibility that a response request signal of the first frequency α is received and a fake response request signal (RF signal) imitating this is transmitted. Further, the other repeater 52 may receive a false response request signal and further transmit a false response request signal (LF signal) of the first frequency α to the portable device 20.

  And in the portable device 20, there exists a possibility that the portable device 1st frequency receiving part 21 may receive the response request signal of the false 1st frequency (alpha) transmitted from the other repeater 52 (FIG.4 S21: YES) ). Further, if the response request signal of the false first frequency α is a normal response request signal, the mobile device normal signal determination unit 24a erroneously determines (step S22 in FIG. 4: YES), and the mobile device second frequency reception is performed. The unit 22a may be activated (step S23 in FIG. 4).

  However, even if the response request signal of the second frequency β is transmitted from the in-vehicle control device 10 following the response request signal of the first frequency α by the in-vehicle second frequency transmission unit 2a (step S2 in FIG. 3), the repeater 51 and 52 do not have a configuration or function corresponding to the response request signal of the second frequency β. For this reason, the repeaters 51 and 52 imitate the response request signal of the second frequency β and do not transmit the response request signal of the false second frequency β, and the portable device second frequency reception unit of the portable device 20 22a does not receive the response request signal of the second frequency β (step S24 in FIG. 4: NO), and a predetermined time elapses (step S25 in FIG. 4: YES). For this reason, the response signal of the second frequency β is not transmitted from the portable device 20, and the predetermined time elapses without the response signal of the second frequency β being received by the in-vehicle control device 10 (step S3: NO in FIG. 3). (Step S4 in FIG. 3: YES). In this case, since the control unit 4 does not control the in-vehicle device, the door lock device 6 does not unlock the 30 doors of the vehicle.

  In addition, after the portable device 20 is in the communicable region R and steps S1 to S6 in FIG. 3 and steps S21 to S28 in FIG. 4 are executed, for example, the user carrying the portable device 20 can communicate with the region R. Suppose you move out. In this case, the subsequent response request signal of the first frequency α transmitted by the in-vehicle first frequency transmission unit 1 in step S6 of FIG. 3 is not received by the portable device first frequency reception unit 21 (FIG. 4). Step S29: NO), predetermined time passes (step S30 of FIG. 4: YES). For this reason, the response signal of the third frequency γ is not transmitted from the portable device third frequency transmission unit 23, and the response signal of the third frequency γ is not received by the in-vehicle third frequency reception unit 3 (step of FIG. 3). S7: NO), a predetermined time elapses (step S8 in FIG. 3: YES).

  Alternatively, after the response request signal of the first frequency α is received by the portable device first frequency receiving unit 21 (step S29 in FIG. 4: YES), the user carrying the portable device 20 is outside the communicable region R. Suppose you move to. In this case, even if a response signal of the third frequency γ is transmitted from the portable device third frequency transmission unit 23 thereafter (step S32 in FIG. 4), the response signal of the third frequency γ is transmitted to the in-vehicle third frequency reception unit 3. The predetermined time elapses (step S8: FIG. 3 YES) without being received (step S7: NO in FIG. 3).

  As described above, if the response signal of the third frequency γ is not received by the in-vehicle third frequency receiving unit 3, the control unit 4 does not execute control of the in-vehicle device, so the door lock device 6 opens the 30 doors of the vehicle. There is no unlocking.

  Further, even if the in-vehicle control device 10 receives the response signal of the second frequency β or the response signal of the third frequency γ (step S3: YES, step S7: YES in FIG. 3), the ID code mismatch or RSSI value If the response signal of the second frequency β or the response signal of the third frequency γ is not a normal response signal, the vehicle-mounted normal signal determination unit 4a may determine that the response signal of the second frequency β or the response signal of the third frequency γ is not a normal response signal (step S5 in FIG. NO, step S9: NO). In these cases, since the control unit 4 does not execute control of the in-vehicle device, the door lock device 6 does not unlock the 30 doors of the vehicle.

  In the above description, when the passive request SW 5a is operated while the portable device 20 is outside the passenger compartment of the vehicle 30, the door lock device 6 is controlled or not executed, and the door is unlocked or locked. An example has been described that remains. However, even when the door SW 25a of the portable device 20 is operated, an operation signal corresponding to the operation is transmitted from the portable device 20 to the vehicle-mounted control device 10, and then the door lock device 6 is performed in the same procedure as in FIGS. By executing or not executing the control, the door can be unlocked or locked.

  Further, even when the engine SW 25 b or the air conditioner SW 25 c of the portable device 20 is operated while the portable device 20 is outside the vehicle compartment of the vehicle 30, an operation signal corresponding to the operation is transmitted from the portable device 20 to the in-vehicle control device 10. After that, the engine and the air conditioner can be started or stopped by executing or not executing the control of the engine device 7 and the air conditioner 8 in the same procedure as in FIGS.

  Further, when the engine SW 5b is operated while the portable device 20 is in the vehicle interior of the vehicle 30, the engine of the vehicle 30 is started by executing or not executing the control of the engine device 7 in the same procedure. Or you can stay stopped.

  Further, instead of the passive entry method, a polling method may be adopted, and the first response request signal of the first frequency α may be transmitted intermittently at a predetermined cycle by the in-vehicle first frequency transmission unit 1.

  According to the above embodiment, the response request signal of the first frequency α and the second frequency β and the response signal of the second frequency β and the third frequency γ are transmitted and received between the in-vehicle control device 10 and the portable device 20. Based on each response signal received by the in-vehicle control device 10 from the portable device 20, the in-vehicle device is controlled. In contrast, in the repeaters 51 and 52 used in the relay attack, the response request signals of the first frequency α and the second frequency β and the response signals of the second frequency β and the third frequency γ are all imitated and transmitted / received. Therefore, the control of the in-vehicle device is not executed by mistake. Therefore, crime prevention against relay attack can be improved.

  Moreover, in the said embodiment, the structure for transmitting / receiving the response request signal of 1st frequency (alpha) and 2nd frequency (beta) and the response signal of 2nd frequency (beta) and 3rd frequency (gamma) (transmission part 1, 2a, 22b, 23) And the in-vehicle control device 10 and the portable device 20 are provided with the receiving units 2b, 3, 21, and 22a). For this reason, it is not necessary to notify the response request signal transmitted from one of the in-vehicle control device 10 and the portable device 20 or the frequency of the response signal to the other in advance, and it is possible to avoid complication of communication processing. .

  Moreover, in the said embodiment, in order for the vehicle-mounted control apparatus 10 to perform control of a vehicle-mounted apparatus, between the vehicle-mounted control apparatus 10 and the portable device 20, five signals by three types of frequency (alpha), (beta), and (gamma) (FIG. 5 (1) to (5) response request signals and response signals) are transmitted and received. For this reason, it becomes difficult to imitate all the five signals by the repeaters 51 and 52 used in the relay attack, and the crime prevention against the relay attack can be further improved.

  Moreover, in the said embodiment, even if the vehicle-mounted control apparatus 10 receives each response signal of 2nd frequency (beta) and 3rd frequency (gamma) from the portable device 20, both response signals of 2nd frequency (beta) and 3rd frequency (gamma) are both. Only when both are legitimate response signals, the in-vehicle control device 10 controls the in-vehicle device. For this reason, crime prevention against a relay attack can be further improved. In addition, when the response signal of the second frequency β is not a normal response signal, the response request signal of the first frequency α that is subsequently generated is not transmitted, and the reception process and the normal determination process of the response signal of the third frequency γ are not performed. Therefore, the processing load of the vehicle-mounted control apparatus 10 can be reduced.

  Moreover, in the said embodiment, only when the response request signal of the 2nd frequency (beta) which the portable device 20 received from the vehicle-mounted control apparatus 10 is a regular response request signal, it is 2nd frequency from the portable device 20 to the vehicle-mounted control apparatus 10. A response signal of β is transmitted. Also, the response of the third frequency γ from the portable device 20 to the in-vehicle control device 10 only when the response request signal of the first frequency α that is received later from the in-vehicle control device 10 by the portable device 20 is a regular response request signal. A signal is transmitted. For this reason, crime prevention against a relay attack can be further improved. Further, when the response request signal of the second frequency β is not a regular response request signal, the response signal of the second frequency β is not transmitted, and the reception request process and the regular determination process of the response request signal of the first frequency α that follows are performed. Since it is not executed, the processing load on the portable device 20 can be reduced.

  Moreover, in the said embodiment, in the portable device 20, the portable device 2nd frequency receiving part 22a is always stopped, and the response request signal of the first first frequency α received from the in-vehicle control device 10 is a normal response request signal. Is determined, the portable device second frequency receiving unit 22a is activated in preparation for receiving the response request signal of the second frequency β. For this reason, the power consumption of the portable device 20 can be reduced as compared with the case where the portable device second frequency receiving unit 22a is always activated.

  Furthermore, in the said embodiment, 2nd frequency (beta) is the same as the frequency used when transmitting the operation signal for operating the engine apparatus 7 or the air conditioner apparatus 8 from the portable device 20. FIG. The third frequency γ is the same as the frequency used when transmitting an operation signal for operating the door lock device 6 from the portable device 20. Furthermore, the first frequency α and the third frequency γ are the same as the response request signal and the frequency of the response signal that are also transmitted and received by the vehicle-mounted control device and the portable device of the conventional passive entry system. For this reason, the in-vehicle control device 10 and the portable device 20 are configured using the existing configuration (the transmission units 1, 2a, 22b, 23, the reception units 2b, 3, 21, 22a) provided in the in-vehicle control device 10 and the portable device 20. It is possible to transmit and receive five signals at three frequencies α, β, and γ, and to easily improve the security against relay attacks.

  The present invention can employ various embodiments other than those described above. For example, in the above embodiment, as shown in FIG. 5 and the like, the response request signal of the first first frequency α is transmitted and received between the in-vehicle control device 10 and the portable device 20 ((1) in FIG. 5). ), The response request signal of the second frequency β is transmitted from the in-vehicle control device 10 until the response request signal of the first frequency α is transmitted from the in-vehicle control device 10 ((4) in FIG. 5). The example ((2), (3) of FIG. 5) which transmitted / received between 20 was shown. However, the present invention is not limited to this.

  In addition to this, for example, as shown in FIG. 9, the response request signal of the first frequency α is transmitted / received between the in-vehicle control device 10 and the portable device 20 ((1) in FIG. 9), and further the first After transmitting the response request signal of frequency α from the in-vehicle control device 10 ((2) in FIG. 9), the response request signal and response signal of the second frequency β are transmitted and received between the in-vehicle control device 10 and the portable device 20. It is also possible ((4), (5) in FIG. 9). In this case, the portable device normal signal determination unit 24a determines that the response request signal of the first frequency α that is later is a normal response request signal, and then the portable device prepares for reception of the response request signal of the second frequency β. The machine second frequency receiver 22a may be activated. In the example of FIG. 9, after receiving the response request signal of the first frequency α that is delayed and transmitting the response signal of the third frequency γ ((3) of FIG. 9), the portable device second frequency receiving unit 22 a Has started.

  Moreover, in the example of FIG. 9, before transmitting the response request signal of the 2nd frequency (beta) from the vehicle-mounted control apparatus 10 ((4) of FIG. 9), it responds to the response request signal of the 1st frequency (alpha) of the late start. A response signal of the third frequency γ is transmitted from the portable device 20 ((3) in FIG. 9). In addition, for example, the response signal of the third frequency γ may be transmitted from the portable device 20 after the response signal of the second frequency β is transmitted from the portable device 20 ((5) in FIG. 9).

  Further, in the above embodiment, the example in which the response request signal of the first frequency α for the position detection of the portable device 20 is transmitted after the response request signal of the first frequency α for the first transmission is transmitted is shown. However, the present invention is not limited to this. Besides this, for example, as shown in FIG. 10, a response request signal of the first frequency α for position detection of the portable device 20 is transmitted from the vehicle-mounted control device 10 to the portable device 20 from the beginning ((1) in FIG. 10). Thereafter, a response signal of the third frequency γ is transmitted from the portable device 20 to the vehicle-mounted control device 10 ((2) in FIG. 10), or a response request of the second frequency β is transmitted between the vehicle-mounted control device 10 and the portable device 20. Signals and response signals may be transmitted and received ((3) and (4) in FIG. 10).

  Further, in the above embodiment, the transmission units 1 and 2a and the reception units 2b and 3 of the in-vehicle control device 10 and the transmission units 22b and 23 and the reception unit 21 of the portable device 20 are always in an activated state. Although the example in which the machine second frequency receiving unit 22a is always in the stopped state has been shown, the present invention is not limited to this. In addition to this, for example, when the passive request SW 5a is operated, the transmission units 1 and 2a and the reception units 2b and 3 of the in-vehicle control device 10 may be activated. In addition, after transmitting the response request signal of the second frequency β, the in-vehicle second frequency transmitting unit 2a is stopped and the in-vehicle second frequency receiving unit 2b is started, and after receiving the response signal of the second frequency β, the in-vehicle second frequency transmitting unit 2a is started. The two-frequency receiving unit 2b may be stopped. In addition, after transmission of the response request signal of the first frequency α, which is delayed, the in-vehicle first frequency transmission unit 1 is stopped and the in-vehicle third frequency reception unit 3 is activated. After receiving the response signal of the third frequency γ, The in-vehicle third frequency receiving unit 3 may be stopped. Moreover, each transmission part 1, 2a, 22b, 23 may be started immediately before each signal transmission, and may be stopped immediately after each signal transmission. Further, the portable device second frequency receiving unit 22a may be always activated.

  In the above embodiment, examples of the control of the in-vehicle device executed by the in-vehicle device control system 100 include the door locking / unlocking by the door lock device 6, the engine starting by the engine device 7, and the driving of the air conditioner by the air conditioner device 8. However, the present invention is not limited to these examples. In addition to these, other in-vehicle devices such as a vehicle audio system may be controlled.

Furthermore, in the above embodiments, an example of applying the present invention to the in-vehicle device control system for four-wheeled vehicles, for example, in-vehicle equipment control system for other vehicles such as motorcycles or large automobiles In contrast, the present invention can be applied.

DESCRIPTION OF SYMBOLS 1 1st vehicle-mounted 1st frequency transmission part 2a 2nd vehicle-mounted 2nd frequency transmission part 2b 2nd vehicle-mounted 2nd frequency reception part 3 3rd vehicle-mounted 3rd frequency reception part 4a Vehicle-mounted regular signal determination part 6 Door lock apparatus (1st vehicle-mounted apparatus)
7 Engine device (second on-vehicle equipment)
8 Air conditioner (second onboard equipment)
DESCRIPTION OF SYMBOLS 10 Vehicle-mounted control apparatus 20 Portable machine 21 Portable machine 1st frequency receiver 22a Portable machine 2nd frequency receiver 22b Portable machine 2nd frequency transmitter 23 Portable machine 3rd frequency transmitter 24a Portable machine regular signal determination part 30 Vehicle 100 Vehicle-mounted Device control system α First frequency β Second frequency γ Third frequency

Claims (6)

An in-vehicle control device mounted on a vehicle and transmitting a response request signal;
A portable device that is carried by a user and transmits a response signal in response to receiving a response request signal from the in-vehicle control device;
In the in-vehicle device control system that executes control of the in-vehicle device based on the response signal received from the portable device by the in-vehicle control device,
The in-vehicle control device is
An in-vehicle first frequency transmission unit for transmitting a response request signal of the first frequency;
An in-vehicle second frequency transmission unit for transmitting a response request signal of the second frequency;
An in-vehicle second frequency receiving unit for receiving a response signal of the second frequency;
An in-vehicle third frequency receiving unit that receives a response signal of the third frequency,
The portable device is
A portable device first frequency receiver for receiving the response request signal of the first frequency;
A portable device second frequency receiver for receiving the response request signal of the second frequency;
A portable device second frequency transmitter for transmitting a response signal of the second frequency;
A portable device third frequency transmitter for transmitting the response signal of the third frequency ,
The in-vehicle control device is
After transmitting the first response request signal of the first frequency by the in-vehicle first frequency transmission unit,
Transmitting the response request signal of the second frequency by the in-vehicle second frequency transmission unit, and transmitting the response request signal of the first frequency by the in-vehicle first frequency transmission unit;
The portable device is
After receiving the first frequency response request signal of the first frequency by the portable device first frequency receiving unit,
When the portable device second frequency receiving unit receives the second frequency response request signal, the portable device second frequency transmitting unit transmits the second frequency response signal,
When the mobile device first frequency reception unit receives the response signal of the first frequency after the transmission, the mobile device third frequency transmission unit transmits the response signal of the third frequency,
The in-vehicle control device receives the second frequency response signal by the in-vehicle second frequency reception unit, and receives the third frequency response signal by the in-vehicle third frequency reception unit, and then receives the second frequency response signal. A vehicle-mounted device control system , wherein the vehicle-mounted device is controlled based on a frequency response signal and the third frequency response signal . In the in-vehicle device control system according to claim 1 ,
The portable device is
The response request signal of the first frequency received by the portable device first frequency receiving unit and the response request signal of the second frequency received by the portable device second frequency receiving unit are normal response signals, respectively. A portable device normal signal determination unit for determining whether or not
When the portable device normal signal determination unit determines that the second frequency response request signal is a normal response request signal, the portable device second frequency transmission unit transmits the second frequency response signal. ,
When the portable device normal signal determination unit determines that the subsequent first frequency response request signal is a normal response request signal, the portable device third frequency transmission unit outputs the response signal of the third frequency. An in-vehicle device control system characterized by transmitting. In the in-vehicle device control system according to claim 2 ,
The portable device is
The portable device first frequency receiving unit is always activated, and the portable device second frequency receiving unit is always stopped,
The portable device normal signal determination unit determines that the first response request signal of the first frequency received by the first frequency receiver of the portable device or the response request signal of the first frequency of the subsequent device is a normal response request signal. The vehicle-mounted device control system, wherein when determined, the portable device second frequency receiving unit is activated in preparation for reception of the response request signal of the second frequency. In the in-vehicle device control system according to any one of claims 1 to 3 ,
The in-vehicle control device is
Whether the response signal of the second frequency received by the in-vehicle second frequency receiving unit and the response signal of the third frequency received by the in-vehicle third frequency receiving unit are normal response signals, respectively. Equipped with a vehicle-mounted regular signal determination unit for determining
When the response signal of the second frequency or the response signal of the third frequency is not received, or even when the response signal of the second frequency and the response signal of the third frequency are received, the response signal of the second frequency If the vehicle-mounted normal signal determination unit determines that at least one of the response signals of the third frequency is not a normal response signal, the control of the vehicle-mounted device is not executed.
The vehicle-mounted device receives the response signal of the second frequency and the response signal of the third frequency, and both the response signal of the second frequency and the response signal of the third frequency are normal response signals. The vehicle-mounted device control system characterized by executing control of the vehicle-mounted device when determined by the regular signal determining unit. In the in-vehicle device control system according to any one of claims 1 to 4 ,
The vehicle-mounted device includes a first vehicle-mounted device that locks and unlocks a door of the vehicle, and a second vehicle-mounted device that starts an engine of the vehicle or drives an air conditioning facility,
The second frequency is the same as the frequency used when transmitting an operation signal for operating the second in-vehicle device from the portable device,
The on-board equipment control system, wherein the third frequency is the same as a frequency used when transmitting an operation signal for operating the first on-board equipment from the portable device. In the in-vehicle device control system according to any one of claims 1 to 5,
The response request signal of the first frequency of the later is a signal for detecting the position of the portable device,
The vehicle-mounted control device transmits the response request signal at a predetermined cycle within a predetermined time.

Images