JP2019073264A - Radio communication system - Google Patents

Abstract

The present invention provides a wireless communication system capable of improving a crime prevention effect while avoiding complication of signal processing.
SOLUTION: An in-vehicle unit 1 capable of wirelessly transmitting an access signal by operating an access button 1a, a portable device 2 capable of wirelessly transmitting a vehicle-specific authentication code on condition that an access signal is received, and authentication A determination unit that can determine whether the authentication code is a legitimate authentication code on condition that the code is received, and the decision unit determines that the authentication code is a legitimate authentication code In a wireless communication system capable of permitting starting of a drive source of a vehicle or enabling traveling of a vehicle, a crime prevention mode in which the function of transmitting an access signal by the in-vehicle unit 1 or an authentication code by the portable device 2 is stopped by a predetermined setting operation. It can be set.
[Selected figure] Figure 2

Description

  The present invention relates to a wireless communication system capable of permitting start of a drive source of a vehicle or enabling traveling of a vehicle when the authentication code acquired by the in-vehicle unit is a legitimate authentication code.

  The portable device includes a portable device that can be carried by a passenger and can transmit an authentication code unique to the vehicle via radio waves, and an on-vehicle unit capable of receiving the transmitted authentication code, and the authentication code wirelessly transmitted from the portable device is legitimate. A wireless communication system (so-called, passive keyless entry device) capable of permitting the release of various locks of the vehicle and the start of the drive source only in the case of the authentication code is popular. In such a wireless communication system, when a user operates an access button disposed on the in-vehicle unit, an access signal is wirelessly transmitted at a low frequency, and a portable device that has received the access signal wirelessly transmits an authentication code at a high frequency. At the same time, when the authentication code is received by the in-vehicle unit, it can be determined whether the authentication code is a legitimate authentication code.

  However, in the wireless communication system as described above, it is not possible to take effective measures against the so-called relay attack that a third party illegally performs communication between the portable device and the on-vehicle unit with a repeater. There was a problem. That is, in communication between the portable device and the in-vehicle unit, since a third party can easily demodulate a modulated signal, the authentication code from the portable device to the in-vehicle unit can be illegally used by using a relay device or the like. To release various locks of the vehicle and to start the drive source of the vehicle.

  In order to prevent such a relay attack as described above, various measures have conventionally been proposed, for example, changing the frequency of the high frequency signal, which measures the time until the low frequency signal is received by the portable device. Measures such as changing the intensity of the radio wave to be transmitted. In addition, as disclosed in, for example, Patent Document 1 as a prior art, it has also been proposed to prevent a relay attack from being a fraudulent act by setting the authentication code to a portable device that can be modulated by a plurality of modulation methods. There is.

JP, 2016-220088, A

  However, in the conventional wireless communication system, the processing configuration of the signal communicated between the in-vehicle unit and the portable device becomes extremely complicated, and it takes a long time to process the authentication of the passenger with a legitimate portable device. As a result, there is a possibility that the accuracy of the authentication process may be lowered, and there is a problem that it is not sufficient to more reliably prevent so-called relay attack fraud.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a wireless communication system capable of improving the crime prevention effect while avoiding the complication of signal processing.

  The invention according to claim 1 is mounted on a vehicle and has an operation means which can be operated by the passenger arbitrarily, and an in-vehicle unit capable of wirelessly transmitting an access signal by operating the operation means, and a passenger being carried And a portable device capable of wirelessly transmitting a vehicle-specific authentication code on condition that the access signal has been received, and whether or not the authentication code is a legitimate authentication code on condition that the authentication code has been received. Wireless communication capable of permitting start of a drive source of the vehicle or enabling traveling of the vehicle when the determination means determines that the authentication code is a legitimate authentication code; In the system, a crime prevention mode in which the function of transmitting the access signal by the in-vehicle unit or the authentication code by the portable device is stopped by a predetermined setting operation Characterized in that it is possible to set a.

  The invention according to claim 2 is the wireless communication system according to claim 1, wherein the crime prevention mode stops both the transmission function of the access signal by the in-vehicle unit and the transmission function of the authentication code by the portable device. It is characterized by

  The invention according to claim 3 is characterized in that, in the radio communication system according to claim 1 or 2, the predetermined setting operation comprises a specific operation on the operation means of the on-vehicle unit.

  The invention according to claim 4 is characterized in that, in the wireless communication system according to claim 1 or 2, the predetermined setting operation comprises a specific operation to an operation unit of the portable device.

  A fifth aspect of the present invention is the wireless communication system according to any one of the first to fourth aspects, wherein the security mode is performed by performing a predetermined release operation on the operation unit of the in-vehicle unit. It is characterized in that it is possible to release.

  The invention according to claim 6 is the wireless communication system according to any one of claims 1 to 4, wherein the security mode is set by performing a predetermined release operation on the operation unit of the portable device. It is characterized in that it can be released.

  The invention according to claim 7 is characterized in that, in the wireless communication system according to claim 6, when the release operation is performed on the operation unit, the security mode can be released and the turn signal of the vehicle can be blinked. I assume.

  The invention according to claim 8 relates to the wireless communication system according to claim 1 or 2, wherein the predetermined setting operation for setting the crime prevention mode or the operation mode on the vehicle side attached to the vehicle, or A predetermined release operation for releasing the crime prevention mode is made possible.

  The invention according to claim 9 is characterized in that, in the wireless communication system according to claim 8, the operation means on the vehicle side is disposed in a handle switch case attached to a handle bar of the vehicle.

  The invention according to claim 10 is the wireless communication system according to any one of claims 5 to 9, wherein, when the security mode is set, a random number code is generated and stored in the storage unit of the in-vehicle unit and the portable device. When stored and when the release operation is performed, the random number code stored in the storage unit of the portable device is compared with the random number code stored in the storage unit of the in-vehicle unit, and these random number codes match It is characterized in that the crime prevention mode is released only in the case.

  The invention according to claim 11 is the wireless communication system according to any one of claims 1 to 10, wherein the on-vehicle unit transmits low frequency to the portable device to generate power, and the power thereof And an immobilizer function capable of wirelessly transmitting the authentication code.

  The invention according to claim 12 is characterized in that, in the wireless communication system according to any one of claims 1 to 11, the notification means capable of notifying the presence or absence of the setting of the crime prevention mode or the occurrence of an error is provided. I assume.

  The invention according to claim 13 is characterized in that, in the wireless communication system according to any one of claims 1 to 12, the predetermined setting operation for setting the crime prevention mode can be previously made valid or invalid. Do.

  According to the invention of claim 1, since the crime prevention mode in which the transmission function of the access signal by the in-vehicle unit or the portable device is stopped can be set by the predetermined setting operation, so only by stopping the transmission function It is possible to surely prevent a relay attack and an illegal act, and to improve the crime prevention effect while avoiding the complication of signal processing.

  According to the invention of claim 2, since the crime prevention mode stops both the transmission function of the access signal by the in-vehicle unit and the transmission function of the authentication code by the portable device, both the transmission function of the access signal and the authentication code is stopped. It can be made to improve the crime prevention effect more.

  According to the invention of claim 3, since the predetermined setting operation comprises a specific operation on the operation means of the in-vehicle unit, it is not necessary to provide a separate new operation means for setting the crime prevention mode, and the manufacturing cost Since the crime prevention mode can be set without taking out the portable device, operability can be improved.

  According to the invention of claim 4, since the predetermined setting operation is a specific operation on the operation unit of the portable device, the setting operation can be performed from a distant position, and the operability can be further improved. .

  According to the invention of claim 5, since the security mode can be released by performing a predetermined release operation on the operation means of the in-vehicle unit, a separate new operation for releasing the security mode It is not necessary to provide a means, and it is possible to suppress an increase in manufacturing cost and to improve the operability.

  According to the invention of claim 6, since the security mode can be released by performing a predetermined release operation on the operation unit of the portable device, it is possible that a third party performs the release operation. This can be reliably prevented, and the security effect can be further improved.

  According to the invention of claim 7, when the release operation is performed on the operation unit, the crime prevention mode can be released and the turn signal of the vehicle can be blinked. Therefore, the release operation cancels the crime prevention mode and the turn of the vehicle The signal can be blinked to perform the operation of activating the answer callback.

  According to the invention of claim 8, a predetermined setting operation for setting the crime prevention mode or a predetermined release operation for canceling the crime prevention mode is made possible to the operation means on the vehicle side attached to the vehicle. A predetermined setting operation for setting the crime prevention mode or a predetermined release operation for canceling the crime prevention mode can be performed at an arbitrary position of the vehicle, and operability can be improved.

  According to the invention of claim 9, since the operation means on the vehicle side is disposed in the steering wheel switch case attached to the steering wheel of the vehicle, the predetermined setting operation for setting the crime prevention mode or the predetermined mode for canceling the crime prevention mode The operability of the release operation of can be further improved.

  According to the invention of claim 10, when the crime prevention mode is set, the random number code is generated and stored in the storage unit of the in-vehicle unit and the portable unit, and when the release operation is performed, the storage unit of the portable unit Since the security mode is canceled only when the stored random number code and the random number code stored in the storage unit of the in-vehicle unit are matched and the random number code matches, the security effect is maintained by matching the random number code. Can.

  According to the invention of claim 11, since the on-vehicle unit has an immobilizer function of transmitting low frequency to the portable device to generate power and wirelessly transmitting the authentication code with the power, the battery of the portable device It is possible to make emergency response smoothly, such as being out of service.

  According to the invention of claim 12, since the notification means capable of notifying the presence or absence of the setting of the crime prevention mode or the occurrence of the error is provided, the setting state of the crime prevention mode and the presence or absence of the error can be visually recognized and grasped.

  According to the invention of claim 13, since the predetermined setting operation for setting the crime prevention mode can be validated or invalidated in advance, the crime prevention mode is set unintentionally by invalidating the predetermined setting manipulation in advance. It can prevent that it does.

Conceptual diagram showing a wireless communication system according to the first embodiment of the present invention (common to the second embodiment) Block diagram showing the same wireless communication system Flow chart showing control at the time of setting of crime prevention mode in the same wireless communication system A flowchart showing control at the time of authentication of an authentication code in the same wireless communication system (common to the second embodiment) Flow chart showing control at the time of release of crime prevention mode in the same wireless communication system Block diagram showing a wireless communication system according to a second embodiment of the present invention Flow chart showing control at the time of setting of crime prevention mode in the same wireless communication system Flow chart showing control at the time of release of crime prevention mode in the same wireless communication system The schematic diagram which shows the operation means by the side of the vehicle in the radio | wireless communications system which concerns on other embodiment of this invention

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The wireless communication system according to the first embodiment is, as shown in FIGS. 1 and 2, between the portable unit 2 (electronic key) carried by the passenger and the in-vehicle unit 1 mounted on a vehicle such as a two-wheeled vehicle A so-called passive keyless entry device capable of wirelessly communicating and permitting start of an engine that is a driving source of a vehicle or enabling traveling of a vehicle when the authentication code acquired by the in-vehicle unit 1 is a legitimate authentication code. It consists of

  The portable unit 2 can be carried by a passenger and can wirelessly transmit an authentication code unique to the vehicle on the condition that an access signal from the in-vehicle unit 1 is received. As shown in FIG. 2a (operation unit), an LED 2b as notification means, a low frequency antenna G1 capable of wirelessly receiving an access signal (low frequency signal) from the in-vehicle unit 1, and wirelessly transmitting an authentication code (high frequency signal) to the in-vehicle unit 1 The high frequency antenna G2, the low frequency antenna G1, the control means 14 electrically connected to the high frequency antenna G2, the battery D, and the coil K are included.

  The control means 14 is provided with a storage means 15 capable of storing a vehicle-specific authentication code, and can be operated by being supplied with power from the battery D or the coil K when the immobilizer function is activated. On the condition that the low frequency antenna G1 has received the access signal, the high frequency antenna G2 can wirelessly transmit the vehicle-specific authentication code.

  The in-vehicle unit 1 is mounted on a vehicle (in the present embodiment, a vehicle body of a two-wheeled vehicle), and as shown in FIG. 1, an access button 1 a (operation means) and a lock bar L which can be operated by a passenger such as a driver. And by operating the access button 1a, it is possible to wirelessly transmit an access signal to the portable device 2. The on-vehicle unit 1 includes, as shown in FIG. 2, a control means 3 and a motor M capable of driving the lock bar L (see FIG. 1), as well as the access button 1a and the lock bar L, and a low frequency antenna F1. It is configured to have a high frequency antenna F2.

  The motor M is electrically connected to the battery 9 mounted on the vehicle via the power control driver 10, is controllable by the motor driver 11, and is capable of moving the lock bar L. The lock bar L is inserted into a lock hole (not shown) formed in the handlebar of the vehicle to lock the handlebar, and the lock position is retracted from the lock hole to unlock the handlebar. It is made movable between and.

  That is, when the lock bar L is in the lock position, the handlebar is locked to prevent the vehicle from traveling, and when the lock bar L is in the unlock position, the handlebar is unlocked and the vehicle is It is possible to run. Further, the position of the lock bar L is detectable by the position detection sensor 16, and the position (lock position or unlock position) of the lock bar L detected by the position detection sensor 16 is transmitted to the control means 3. It is made possible.

  The control means 3 is electrically connected to the low frequency antenna F1 through the low frequency driver 12 and electrically connected to the high frequency antenna F2 through the high frequency driver 13, and the low frequency signal of the low frequency antenna F1 is Control based on transmission and reception of a high frequency signal by the high frequency antenna F2 is enabled. Further, the control means 3 is electrically connected to the access button 1a (operation means), and is IPD with respect to the ECU (engine control unit) 17 mounted on the vehicle and the turn signals S (direction indicator lights) on the left and right. (Intelligent power device) It is electrically connected via 18 grade | etc.,.

  Furthermore, the control means 3 according to the present embodiment can wirelessly transmit an access signal composed of a low frequency signal from the low frequency antenna F1 to the portable device 2 on condition that the access button 1a is pressed. It is possible to determine whether the received authentication code is a legitimate authentication code or not, on condition that the authentication code consisting of a high frequency signal wirelessly transmitted from the portable device 2 is received by the high frequency antenna F2, Storage means capable of storing the random number code etc., the determination means 4 capable of performing the setting, the setting means 5 capable of setting the crime prevention mode, the release means 6 capable of releasing the crime prevention mode, the immobilizer control means 7 And means 8 are configured.

  The determination means 4 is formed in the control means 3 disposed in the in-vehicle unit 1 and, on condition that the authentication code transmitted from the portable device 2 is received by the high frequency antenna F2, the authentication code is legitimate. It can be determined whether or not it is an authentication code. Then, when it is determined that the authentication code received by the determination means 4 is correct, the control by the control means 3 drives the motor M to drive the lock bar L when the lock bar L is in the lock position. Is moved to the unlock position, a permission signal is sent to the ECU 17, and start of the engine (drive source) is permitted (for example, operation of the starter is permitted). On the other hand, when the determination means 4 determines that the authentication code received is not normal, the motor M is not driven and the permission signal to the ECU 17 is not transmitted.

  Here, in the wireless communication system according to the present embodiment, it is possible to set the crime prevention mode in which the transmission function of the access signal by the in-vehicle unit 1 is stopped at least by a predetermined setting operation. Specifically, when a specific operation (for example, a "long press operation" or a "continuous press operation" different from a normal operation) is performed on the access button 1a (operation means) of the in-vehicle unit 1, The security mode is set by the setting means 5, and at least the transmission function of the access signal by the in-vehicle unit 1 is stopped. Thereby, when the crime prevention mode is set, the low frequency antenna G1 of the portable unit 2 does not transmit an access signal (low frequency signal) from the low frequency antenna F1 of the in-vehicle unit 1 even when the access button 1a is pressed. Reception of the access signal by the

  In the crime prevention mode, at least stopping the transmission function of the access signal by the in-vehicle unit 1 is sufficient, and in addition to stopping the transmission function of the access signal by the in-vehicle unit 1, the transmission function of the authentication code by the portable device 2 is stopped (that is, the in-vehicle unit Both the function of transmitting the access signal by the unit and the function of transmitting the authentication code by the portable device may be stopped. Further, the predetermined operation for setting the crime prevention mode is not limited to a specific operation on the access button (operation means) of the in-vehicle unit 1 as in the present embodiment, but the operation button 2a (operation unit) of the portable device 2 It is good also as specific operation (for example, "long press operation" different from normal operation, "continuous press operation", etc.).

  The release means 6 can release the crime prevention mode by performing a predetermined release operation on the operation button 2 a (operation portion) of the portable device 2. Then, the security mode is canceled, and the transmission function of the access signal by the in-vehicle unit 1 (in this embodiment, the transmission function of the authentication code by the portable device 2 in addition to the transmission function of the access signal) is restored. Transmission of an access signal by the in-vehicle unit 1 and transmission of an authentication code by the portable device 2 are enabled.

  Further, the predetermined operation for releasing the crime prevention mode is not limited to a specific operation on the operation button 2a (operation unit) of the portable device 2 as in the present embodiment, and the predetermined operation for the access button 1a (operation means) of the in-vehicle unit 1 A specific operation (for example, “long press operation” or “continuous press operation” different from the normal operation, etc.), or operation means separately provided in the in-vehicle unit 1 or the vehicle It may be an operation for the operation means disposed at the position).

  Furthermore, in the present embodiment, when the crime prevention mode is set, a random number code is generated by the control means 3 and stored in the storage means 8 of the in-vehicle unit 1 and the storage means 15 of the portable device 2 respectively. If it is, the random number code stored in the storage unit 15 of the portable device 2 is compared with the random number code stored in the storage unit 8 of the in-vehicle unit 2, and the security mode is released only when these random number codes match. It is supposed to

  The immobilizer control means 7 conditions that a predetermined operation (a unique operation different from the operation at the time of transmission of the access signal or the operation at the setting of the crime prevention mode) is performed on the access button 1a of the in-vehicle unit 1, for example. As, to enable the immobilizer function. That is, for example, when the battery D of the portable device 2 is exhausted and power supply becomes impossible, when a specific operation is performed on the access button 1 a while the portable device 2 is in proximity to the on-vehicle unit 1 The immobilizer control means 7 operates to transmit a low frequency to the portable device 2 to generate power in the coil K, and wirelessly transmit the authentication code with the power.

  Further, the portable device 2 according to the present embodiment is provided with the LED 2b as a notification means, and the LED 2b can be lit or blinked in a state where the crime prevention mode is set. Thereby, it can be notified that the crime prevention mode is set by lighting or blinking of the LED 2b. As described above, the LED 2 b (notification means) reports the presence or absence of the setting of the crime prevention mode, an error (error during generation of random numbers, error during communication between the in-vehicle unit 1 and the portable device 2, etc. ) May be notified. The notification means is not limited to the LED 2 b provided in the portable device 2, and other display means provided in the portable device 2, or display means such as LEDs provided in the in-vehicle unit 1, and It is good also as attached display means (for example, a meter panel, a separate liquid crystal display panel, etc.).

Next, control contents at the time of setting the crime prevention mode in the wireless communication system according to the present embodiment will be described based on the flowchart of FIG. 3.
First, in S1, it is determined whether or not a predetermined setting operation for setting a crime prevention mode (in the present embodiment, a specific operation on the access button 1a) has been performed, and it is determined that the predetermined setting operation is performed. At step S2, the control means 3 generates a random number code, and the random number code is wirelessly transmitted to the portable device 2 by the low frequency antenna F1.

  After the random number code is stored in the storage unit 8 of the in-vehicle unit 1 and the storage unit 15 of the portable device 2 in S3, respectively, the random number code is normally stored in the storage unit 8 of the in-vehicle unit 1 in S4. It is determined whether or not the random number code is normally stored in the storage unit 15 of the portable device 2 in S5. When it is determined in either S4 or S5 that the random number code is not stored normally, the setting of the crime prevention mode is canceled in S7, and it is determined that the random number code is stored normally in both S4 and S5. Then, the process proceeds to S6, where the setting of the crime prevention mode by the setting means 5 is performed.

Next, control contents at the time of authenticating the authentication code in the wireless communication system according to the present embodiment will be described based on the flowchart of FIG.
First, in S1, it is determined whether or not an operation (a single pressing operation) on the access button 1a has been performed, and if it is determined that such an operation has been made, the process proceeds to S2, and whether or not a crime prevention mode is set. It is judged. If it is determined in S2 that the crime prevention mode is not set, the process proceeds to S3 and wirelessly transmits an access signal by the low frequency antenna F1. Then, in S4, the authentication code from the portable device 2 is transmitted by the high frequency antenna F2. To receive.

  Then, in S5, the judging means 4 judges whether the authentication code from the portable device 2 is a legitimate authentication code or not, and if judged as a legitimate authentication code, it proceeds to S6 and transmits a permission signal to the ECU 17 Allow the start of the engine (drive source). Further, in the present embodiment, in addition to the transmission of the permission signal to the ECU 17 in S6, when the lock bar L is in the lock position, the motor M is driven to set the lock bar L to the unlock position, allowing the vehicle to travel. I have to.

  On the other hand, when it is determined in S2 that the crime prevention mode is set, subsequent S3 to S6 are skipped, and the function of transmitting the access signal from the in-vehicle unit 1 is stopped. Also, if it is determined in S5 that the authentication code from the portable device 2 is not a valid authentication code, S6 is skipped, so the engine (drive source) can not be started, and the lock bar L The lock by is not released.

Next, control contents at the time of canceling the crime prevention mode in the wireless communication system according to the present embodiment will be described based on the flowchart of FIG.
First, in S1, it is determined whether or not the pressing operation (predetermined release operation) on the operation button 2a of the portable device 2 is performed, and if it is determined that the operation is performed, the process proceeds to S2, and the portable device 2 is Receive stored random number code. That is, when the operation button 2a of the portable device 2 is operated, the random number code stored in the storage unit 15 of the portable device 2 is wirelessly transmitted by the high frequency antenna G2, and the random number code is transmitted to the high frequency antenna F2 of the in-vehicle unit 1 Reception is possible.

  Thereafter, in S3, the control means 3 checks the random number code stored in the storage means 8 of the in-vehicle unit 1 and the random number code transmitted from the portable device 2 and determines whether these random number codes match. Be done. When it is determined that the random number codes match as a result of the random number code comparison, the process proceeds to S4, where the security mode is canceled by the release means 6 and it is determined that the random number codes do not match. In step S5, the security mode is not released by the release means 6, and the setting of the security mode is continued.

  Therefore, when the normal operation (one pressing operation) on the access button 1a of the in-vehicle unit 1 is performed after the crime prevention mode is released, an access signal is transmitted from the low frequency antenna F1 of the in-vehicle unit 1, The authentication code from the device 2 may be determined by the determination means 4 or when the security mode is released, an access signal is automatically transmitted from the low frequency antenna F1 of the in-vehicle unit 1, and the portable device 2 The authentication code from may be determined by the determination means 4.

  As described above, when it is necessary to operate the access button 1a after the crime prevention mode is released, the crime prevention effect can be enhanced, and when the determination of the authentication code is performed automatically, the operability can be improved. Can. In addition, it is preferable that control that requires an operation on the access button 1a after the security mode is canceled and control in which the authentication code is automatically determined can be selected arbitrarily.

Next, a wireless communication system according to a second embodiment of the present invention will be described.
The wireless communication system according to the second embodiment is mounted on a portable device 2 (electronic key) carried by a passenger and a vehicle such as a two-wheeler vehicle as shown in FIGS. Wirelessly communicate with the in-vehicle unit 1, and when the authentication code acquired by the in-vehicle unit 1 is a legitimate authentication code, permits starting of the engine that is the drive source of the vehicle or enables the vehicle to travel It consists of a so-called passive keyless entry device. The same components as those of the first embodiment are denoted by the same reference numerals, and the detailed description thereof is omitted.

  In the wireless communication system according to the present embodiment, the setting means 5 and the releasing means 6 in the first embodiment are formed in the control means 14 of the portable device 2 (electronic key). Here, in the wireless communication system according to the present embodiment, it is possible to set the crime prevention mode in which at least the transmission function of the authentication code by the portable device 2 is stopped by a predetermined setting operation. Specifically, when a specific operation (for example, "long press operation" or "continuous press operation" or the like different from the normal operation) is performed on the operation button 2a (operation unit) of the portable device 2, The security mode is set by the setting means 5, and at least the transmission function of the authentication code by the portable device 2 is stopped. Thereby, when the crime prevention mode is set, the access signal is transmitted from the low frequency antenna F1 of the in-vehicle unit 1 by pressing the access button 1a, and the low frequency antenna G1 of the portable device 2 receives the access signal. Even in this case, the transmission of the authentication code (high frequency signal) from the high frequency antenna G2 of the portable device 2 is not performed.

  In the crime prevention mode, it is sufficient if at least the transmission function of the authentication code by the portable device 2 is stopped, and in addition to the transmission function of the authentication code by the portable device 2, the transmission function of the access signal by the in-vehicle unit 1 is stopped. Both the transmission function of the access signal and the transmission function of the authentication code by the portable device may be stopped. Further, the predetermined operation for setting the crime prevention mode is not limited to a specific operation on the operation button 2a (operation unit) of the portable device 2 as in the present embodiment, and an access button (operation means) of the on-vehicle unit 1 It is good also as specific operation (for example, "long press operation" different from normal operation, "continuous press operation", etc.).

  The release means 6 can release the crime prevention mode by performing a predetermined release operation on the operation button 2 a (operation portion) of the portable device 2. Then, the security mode is canceled, and the transmission function of the authentication code by the portable device 2 (in this embodiment, the transmission function of the access signal by the in-vehicle unit 1 in addition to the transmission function of the authentication code) is restored. Transmission of an access signal by the in-vehicle unit 1 and transmission of an authentication code by the portable device 2 are enabled.

  Further, the predetermined operation for releasing the crime prevention mode is not limited to a specific operation on the operation button 2a (operation unit) of the portable device 2 as in the present embodiment, and the predetermined operation for the access button 1a (operation means) of the in-vehicle unit 1 A specific operation (for example, “long press operation” or “continuous press operation” different from the normal operation, etc.), or operation means separately provided in the in-vehicle unit 1 or the vehicle It may be an operation for the operation means disposed at the position).

  Furthermore, as in the first embodiment, when setting the crime prevention mode, the control means 3 generates a random number code and stores it in the storage means 8 of the in-vehicle unit 1 and the storage means 15 of the portable device 2 respectively. When the operation is performed, the random number code stored in the storage unit 15 of the portable device 2 and the random number code stored in the storage unit 8 of the in-vehicle unit 2 are collated. The mode may be canceled.

  Further, the portable device 2 according to the present embodiment is provided with the LED 2b as a notification means, and the LED 2b can be lit or blinked in a state where the crime prevention mode is set. Thereby, it can be notified that the crime prevention mode is set by lighting or blinking of the LED 2b. As described above, the occurrence of an error may be notified by the LED 2 b (informing means) other than the one notifying the presence or absence of the setting of the crime prevention mode. The notification means is not limited to the LED 2 b provided in the portable device 2, and other display means provided in the portable device 2, or display means such as LEDs provided in the in-vehicle unit 1, and It is good also as attached display means (for example, a meter panel, a separate liquid crystal display panel, etc.).

  Here, in the present embodiment, a selection unit 19 is provided which can previously enable or disable a predetermined setting operation for setting the crime prevention mode. The selection unit 19 includes, for example, an operation switch or the like provided in the in-vehicle unit 1, the portable device 2 or the vehicle, and a predetermined setting operation for setting the crime prevention mode by the user operating the operation switch or the like in advance. Valid or invalid of can be set in advance.

Next, control contents when setting the crime prevention mode in the wireless communication system according to the present embodiment will be described based on the flowchart of FIG. 7.
When a predetermined setting operation for setting the crime prevention mode (in the present embodiment, a specific operation on the operation button 2a (operation unit) of the portable device 2) is performed, the setting unit 19 sets It is determined whether or not the operation is valid (S1), and if it is valid, the process proceeds to S2, and the security code signal is wirelessly transmitted to the portable device 2 by the low frequency antenna F1.

  Then, on the side of the portable device 2, when the low frequency antenna G1 of the portable device 2 receives the crime prevention code signal at S3, it is judged whether the received crime prevention code signal is correct (S4). If determined, the process proceeds to S5, and the high frequency antenna G2 of the portable device 2 transmits a crime prevention mode setting signal. Thereafter, the process proceeds to S6, the crime prevention mode is set by the setting means 5, and the process proceeds to S7, and notification that the crime prevention mode is set is performed by the LED 2b disposed in the portable device 2 or a separate display means. . If it is determined in S4 that the crime prevention code signal is not correct, the process proceeds to S8, and the setting of the crime prevention mode is canceled.

  On the other hand, when the crime prevention mode setting signal is transmitted in S5, it is judged whether or not the crime prevention mode setting signal is received on the in-vehicle unit 1 side (S9), and when the crime prevention mode setting signal is correctly received, S10. Then, the notification that the crime prevention mode has been set is performed by the LED disposed on the in-vehicle unit 1, the separate display means, and the like. If it is determined in S1 that the setting operation is invalidated by the selection unit 19, S2, S9, and S10 are skipped, and it is determined that the crime prevention mode setting signal is not correctly received in S9. In the case, it is supposed to skip S10.

Next, control contents when canceling the crime prevention mode in the wireless communication system according to the present embodiment will be described based on the flowcharts of FIGS. 8 and 4.
When a pressing operation (predetermined release operation) on the operation button 2a of the portable device 2 is performed, it is determined whether or not the release operation is performed at Sa. If there is a release operation, the process proceeds to Sb and the release means 6 When the security mode is released by the operation mode, if the release operation is not performed, the process proceeds to Sc and the security mode is continued. When the operation on the access button 1a is performed after the crime prevention mode is canceled in Sb, the same control A as that in the first embodiment is performed.

  That is, as shown in the flowchart of FIG. 4, in the control A, it is determined whether or not an operation (one pressing operation) on the access button 1 a has been performed in S1. In S2, it is determined whether a crime prevention mode is set. If it is determined in S2 that the crime prevention mode is not set, the process proceeds to S3 and wirelessly transmits an access signal by the low frequency antenna F1. Then, in S4, the authentication code from the portable device 2 is transmitted by the high frequency antenna F2. To receive.

  Then, in S5, the judging means 4 judges whether the authentication code from the portable device 2 is a legitimate authentication code or not, and if judged as a legitimate authentication code, it proceeds to S6 and transmits a permission signal to the ECU 17 Allow the start of the engine (drive source). Further, in the present embodiment, in addition to the transmission of the permission signal to the ECU 17 in S6, when the lock bar L is in the lock position, the motor M is driven to set the lock bar L to the unlock position, allowing the vehicle to travel. I have to.

  On the other hand, when it is determined in S2 that the crime prevention mode is set, subsequent S3 to S6 are skipped, and the function of transmitting the access signal from the in-vehicle unit 1 is stopped. Also, if it is determined in S5 that the authentication code from the portable device 2 is not a valid authentication code, S6 is skipped, so the engine (drive source) can not be started, and the lock bar L The lock by is not released.

  According to the first and second embodiments, the transmission function of the access signal (the first embodiment) by the in-vehicle unit 1 or the authentication code (the second embodiment) by the portable device 2 by the predetermined setting operation can be obtained. Since it is possible to set the crime prevention mode to be stopped, it is possible to reliably prevent so-called relay attack fraud by simply stopping the transmission function, and to improve the crime prevention effect while avoiding that the signal processing is complicated. It can be done. Moreover, if both the transmission function of the access signal by the on-vehicle unit 1 and the transmission function of the authentication code by the portable device 2 are stopped in the crime prevention mode, the transmission function of the access signal and the authentication code is stopped. The security effect can be further improved.

  Furthermore, since the predetermined setting operation for setting the crime prevention mode consists of a specific operation on the access button 1a (operation means) of the in-vehicle unit 1, a separate new operation means for setting the crime prevention mode is provided. Since there is no need to suppress the increase in the manufacturing cost and the crime prevention mode can be set without taking out the portable device 2, operability can be improved. In addition, as a predetermined setting operation for setting the crime prevention mode, the setting operation can be performed from a distant position if it is configured to be a specific operation on the operation button 2a (operation unit) of the portable device 2 The operability can be further improved.

  Furthermore, since the security mode can be released by performing a predetermined release operation on the operation button 2 a (operation unit) of the portable device 2, the release operation is performed on the access button 1 a of the in-vehicle unit 1. As compared with what is performed, it is possible to reliably prevent a third party from performing the release operation, and to further improve the crime prevention effect. Further, if the security mode can be released by performing a predetermined release operation on the access button 1a (operation means) of the in-vehicle unit 1, a separate new operation means for releasing the security mode can be provided. Since it is not necessary to provide and it can suppress that a manufacturing cost increases, since a crime prevention mode can be cancelled | released without taking out the portable device 2, operativity can be improved.

  In addition, according to the present embodiment, when the release operation is performed on the operation button 2a (operation unit) of the portable device 2, the crime prevention mode can be released and the turn signal S of the vehicle can be blinked. Can be combined with an operation of releasing the crime prevention mode and an operation of blinking the turn signal S of the vehicle to activate the answer callback.

  Furthermore, when setting the crime prevention mode, the random number code is generated and stored in the storage means (8, 15) of the in-vehicle unit 1 and the portable device 2 respectively, and when the release operation is performed, the storage means of the portable device 2 The random number code stored in 15 and the random number code stored in the storage means 8 of the in-vehicle unit 1 are collated, and the security mode is released only when the random number codes match. Can be maintained.

  Furthermore, since the in-vehicle unit 1 according to the present embodiment transmits low frequency to the portable device 2 to generate power and has the immobilizer function capable of wirelessly transmitting the authentication code by the power, the portable device 2 It is possible to smoothly handle emergency situations such as battery exhaustion. In addition, since the portable device 2 (which may be the in-vehicle unit 1) includes the LED 2b (informing means) that can notify that the crime prevention mode is set, when the passenger leaves the vehicle, The setting state can be visually recognized and grasped. The notification means may be another display means included in the vehicle.

  As mentioned above, although this embodiment was described, the present invention is not limited to this, for example, predetermined setting operation which sets up crime prevention mode to operation means by the side of vehicles attached to vehicles, or crime prevention mode A predetermined release operation for releasing the key may be made possible. In this case, as the operation means on the vehicle side, as shown in FIG. 9, the switch M1 or the switch M2 disposed in the steering wheel switch case C attached to the steering wheel H of the vehicle may be used. In addition, the code | symbol G in the same figure has shown the grip grip which a driver | operator can hold.

  The switch M1 is composed of a cross key which can be operated by pressing left and right and up and down, for example, to display a menu on a display means (a meter panel or a separate liquid crystal display means etc.) of the vehicle. The security mode may be set or released by selecting and determining with the switch M1. The switch M2 may be an operation button that can be pressed, and the security mode may be set or canceled by pressing the operation button.

  As described above, when the predetermined setting operation for setting the crime prevention mode or the predetermined release operation for canceling the crime prevention mode is enabled for the operation unit on the vehicle side attached to the vehicle, the crime prevention mode is set. The predetermined setting operation or the predetermined cancellation operation for canceling the crime prevention mode can be performed at an arbitrary position of the vehicle, and the operability can be improved. In particular, since the operation means on the vehicle side is disposed in the steering wheel switch case C attached to the steering wheel H of the vehicle, the predetermined setting operation for setting the crime prevention mode or the predetermined release operation for canceling the crime prevention mode Sex can be further improved.

  In addition, for example, when it is determined by the determination means 4 that the authentication code is a normal authentication code, a permission signal is transmitted to the ECU 17 as in the present embodiment to permit starting of the vehicle engine (drive source) , Instead of the lock bar L being able to move the vehicle with the unlock position, exclusively transmitting a permission signal to the ECU 17 to permit starting of the vehicle engine (drive source) or exclusively the lock bar The vehicle may be allowed to travel with L as the unlock position.

  Also, when the release operation is performed on the operation button 2a of the portable device 2, the security mode is released, and the turn signal of the vehicle is blinked, instead of activating the answer callback, the answer callback is executed. It may be one that is not activated, or one that activates other functions along with the release of the security mode. Furthermore, it is good also as a thing which does not have an alarm means, such as what does not have an immobilizer function, or LED2b. In the present embodiment, although applied to a two-wheeled vehicle, the present invention may be applied to other vehicles such as an ATV, a snowmobile, a construction machine or an agricultural machine, and a car.

  In the case of a wireless communication system in which it is possible to set a crime prevention mode in which the transmission function of the access signal by the in-vehicle unit or the portable device is stopped by a predetermined setting operation, Or the like.

1 In-vehicle unit 1a access button (operation means)
2 Portable device 2a Operation button (operation unit)
2b LED (informing means)
Reference Signs List 3 control means 4 determination means 5 setting means 6 release means 7 immobilizer control means 8 storage means 9 battery 10 power control driver 11 motor driver 12 low frequency driver 13 high frequency driver 14 control means 15 storage means 16 position detection sensor 17 ECU
18 IPD (semiconductor devices)
19 Selection Means S Turn Signal M Motor F1 Low Frequency Antenna F2 High Frequency Antenna G1 Low Frequency Antenna G2 High Frequency Antenna D Battery K Coil

Claims (13)

An on-vehicle unit mounted on a vehicle and capable of wirelessly transmitting an access signal by operating the operation means while having an operation means that can be operated by a passenger arbitrarily.
A portable device capable of wirelessly transmitting a vehicle-specific authentication code, provided that the passenger is portable, and has received the access signal;
Determining means capable of determining whether the authentication code is a legitimate authentication code, on condition that the authentication code has been received;
In a wireless communication system, the wireless communication system may be configured to allow starting of a drive source of a vehicle or enable traveling of a vehicle when the determination unit determines that the authentication code is a proper authentication code.
A wireless communication system characterized in that it is possible to set a crime prevention mode in which a transmission function of the access signal by the in-vehicle unit or the authentication code by the portable device is stopped by a predetermined setting operation.   The wireless communication system according to claim 1, wherein the crime prevention mode stops both the transmission function of the access signal by the in-vehicle unit and the transmission function of the authentication code by the portable device.   The wireless communication system according to claim 1 or 2, wherein the predetermined setting operation comprises a specific operation on the operation means of the in-vehicle unit.   The wireless communication system according to claim 1 or 2, wherein the predetermined setting operation comprises a specific operation on an operation unit of the portable device.   The wireless communication according to any one of claims 1 to 4, wherein the crime prevention mode can be released by performing a predetermined release operation on the operation means of the in-vehicle unit. system.   The wireless communication system according to any one of claims 1 to 4, wherein the security mode can be released by performing a predetermined release operation on an operation unit of the portable device. .   The wireless communication system according to claim 6, wherein when the release operation is performed on the operation unit, the security mode can be released and a turn signal of the vehicle can be blinked.   The predetermined setting operation for setting the crime prevention mode or the predetermined release operation for canceling the crime prevention mode is made possible to the operation means on the vehicle side attached to the vehicle. The wireless communication system according to claim 1 or 2.   9. The wireless communication system according to claim 8, wherein the operation means on the vehicle side is disposed in a handle switch case attached to a handlebar of the vehicle. When setting the crime prevention mode, a random number code is generated and stored in the storage unit of the in-vehicle unit and the portable unit, and when the release operation is performed, the random number code stored in the storage unit of the portable unit 10. The method according to any one of claims 5 to 9, wherein the security mode is canceled only when the random number code stored in the storage unit of the in-vehicle unit is compared with each other and the random number code matches. Wireless communication system as described.
  The in-vehicle unit has an immobilizer function capable of transmitting a low frequency to the portable device to generate power, and wirelessly transmitting the authentication code using the power. The wireless communication system according to any one of the preceding claims.   The wireless communication system according to any one of claims 1 to 11, further comprising: notification means capable of notifying the presence or absence of the setting of the crime prevention mode or the occurrence of an error.   The wireless communication system according to any one of claims 1 to 12, wherein the predetermined setting operation for setting the crime prevention mode can be enabled or disabled in advance.

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