JP7178010B2 - wireless communication system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wireless communication system that permits starting of a driving source of a vehicle or allows the vehicle to run when an authentication code acquired by an in-vehicle unit is a regular authentication code.

A portable device that is carried by a passenger and capable of transmitting a vehicle-specific authentication code by radio waves, and an in-vehicle unit capable of receiving the transmitted authentication code, wherein the authentication code wirelessly transmitted from the portable device is authenticated. A wireless communication system (a so-called passive keyless entry device) that can permit unlocking of various vehicle locks and starting of a drive source only when the authentication code is . In such a wireless communication system, when an access button provided on an in-vehicle unit is pressed, an access signal is wirelessly transmitted at a low frequency, and the portable device that receives the access signal wirelessly transmits an authentication code at a high frequency. In addition, when the authentication code is received by the in-vehicle unit, it is configured to be able to determine whether the authentication code is a valid authentication code.

However, in the wireless communication system as described above, it is said that it is impossible to take effective countermeasures against so-called relay attacks, in which a third party illegally communicates between the portable device and the vehicle-mounted unit using a repeater. I had a problem. In other words, since a third party can easily demodulate the modulated signal in the communication between the portable device and the in-vehicle unit, it is possible to illegally transfer the authentic authentication code from the portable device to the in-vehicle unit using a repeater or the like. is transmitted, unlocking various locks of the vehicle and starting the driving source of the vehicle become possible.

Various countermeasures have been proposed in the past in order to prevent fraudulent acts such as relay attacks as described above. measures such as changing the strength of the radio waves to be transmitted. As a prior art, for example, as disclosed in Patent Document 1, it has been proposed to prevent a fraudulent act such as a relay attack by using a portable device that can modulate an authentication code by a plurality of modulation methods. there is

JP 2016-220088 A

However, in conventional wireless communication systems, the signal processing configuration for communication between the in-vehicle unit and the portable device is extremely complicated, and it takes a long time to authenticate a passenger with a valid portable device. In addition, there is a risk that the accuracy of the authentication process will be lowered, and that it is insufficient to more reliably prevent fraudulent acts such as so-called relay attacks.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless communication system capable of improving the crime prevention effect while avoiding signal processing from becoming complicated.

The invention according to claim 1 comprises an in-vehicle unit that is mounted in a vehicle and has operation means that can be arbitrarily operated by a passenger, and that can wirelessly transmit an access signal by operating the operation means; a portable device capable of wirelessly transmitting an authentication code unique to a vehicle on the condition that the access signal is received; wireless communication capable of permitting starting of the drive source of the vehicle or enabling the vehicle to run when the determination means determines that the authentication code is a valid authentication code In the system, by performing a predetermined setting operation, it is possible to set a crime prevention mode for stopping the transmission function of the access signal by the vehicle-mounted unit or the authentication code by the portable device, and to the operation unit of the portable device. The crime prevention mode can be canceled by performing a predetermined cancellation operation, and when the crime prevention mode is set, a random number code is generated and stored in the storage means of the in-vehicle unit and the portable device, respectively, When the release operation is performed on the operation unit of the portable device, the random number code stored in the storage means of the portable device and the random number code stored in the storage means of the in-vehicle unit are collated, and The security mode is released only when the random number codes match .

According to a second aspect of the present invention, in the wireless communication system according to the first aspect, the security mode stops both the function of transmitting the access signal by the vehicle-mounted unit and the function of transmitting 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 claim 2, the predetermined setting operation comprises a specific operation for the operation means of the vehicle-mounted unit.

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

The invention according to claim 5 is the wireless communication system according to any one of claims 1 to 4, wherein when the determination means determines that the authentication code is a valid authentication code, the vehicle is exclusively driven. It is characterized by allowing the start-up of the source .

The invention according to claim 6 is the wireless communication system according to any one of claims 1 to 4, wherein when the determination means determines that the authentication code is a valid authentication code, the steering wheel of the vehicle is exclusively used. It is characterized in that the vehicle can be driven with the lock bar that locks the bar at the unlocked position .

According to a seventh aspect of the present invention, there is provided the radio communication system according to the sixth aspect, wherein the crime prevention mode can be canceled and a turn signal of the vehicle can be flashed when the cancellation operation is performed on the operation unit. and

The invention according to claim 8 is the wireless communication system according to claim 1 or claim 2, wherein the predetermined setting operation for setting the crime prevention mode is performed on the operation means on the vehicle side attached to the vehicle. It is characterized by being made possible.

According to a ninth aspect of the present invention, there is provided the radio communication system according to the eighth aspect, wherein the operating means on the vehicle side is arranged in a handle switch case attached to a handlebar of the vehicle.

According to a tenth aspect of the present invention, there is provided the radio communication system according to the ninth aspect, wherein the operating means on the vehicle side comprises a cross key which can be operated by pushing left/right and up/down in order to select and determine the display of the display means. characterized by

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

The invention according to claim 12 is the radio communication system according to any one of claims 1 to 11, characterized by further comprising an informing means capable of informing whether or not the security mode is set or occurrence of an error. and

The invention according to claim 13 is the wireless communication system according to any one of claims 1 to 12, characterized in that the predetermined setting operation for setting the security mode can be enabled or disabled in advance. do.

According to the first aspect of the present invention, by performing a predetermined setting operation, it is possible to set a crime prevention mode for stopping the transmission function of the access signal by the vehicle-mounted unit or the authentication code by the portable device. It is possible to reliably prevent a fraudulent act such as a relay attack, and improve the crime prevention effect while avoiding complication of signal processing.
Further, since the crime prevention mode can be canceled by performing a predetermined cancellation operation on the operation unit of the portable device, it is possible to reliably prevent a third party from performing the cancellation operation. , the crime prevention effect can be further improved.
Furthermore, when the crime prevention mode is set, a random number code is generated and stored in the storage means of the in-vehicle unit and the portable device, respectively. The random number codes stored in the storage means of the unit are collated, and the crime prevention mode is canceled only when the random number codes match.

According to the second aspect of the present invention, the crime prevention mode stops both the access signal transmission function of the in-vehicle unit and the authentication code transmission function of the portable device, so both the access signal and authentication code transmission functions are stopped. It is possible to further improve the crime prevention effect.

According to the invention of claim 3, since the predetermined setting operation consists of a specific operation to the operation means of the vehicle-mounted unit, there is no need to provide a separate new operation means for setting the crime prevention mode, and the manufacturing cost is reduced. Since the security mode can be set without taking out the portable device, operability can be improved.

According to the invention of claim 4, the predetermined setting operation consists of a specific operation on the operation unit of the portable device, so that the setting operation can be performed from a remote position, and the operability can be further improved. .

According to the invention of claim 7, 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 flashed. It can also be combined with the operation of blinking the signal and activating the answer callback.

According to the eighth aspect of the invention, a predetermined setting operation for setting the crime prevention mode can be performed with respect to the operation means on the vehicle side attached to the vehicle. can be performed at any position on the vehicle, and operability can be improved.

According to the ninth aspect of the invention, since the operation means on the vehicle side is arranged in the handle switch case attached to the handlebar of the vehicle, a predetermined setting operation for setting the crime prevention mode or a predetermined operation for canceling the crime prevention mode can be performed. operability of the release operation can be further improved.

According to the eleventh aspect of the invention, the vehicle-mounted unit has an immobilizer function capable of transmitting a low frequency to the portable device to generate power, and using the power to wirelessly transmit the authentication code. It is possible to smoothly respond to emergencies such as disconnection.

According to the twelfth aspect of the invention, since the informing means capable of informing whether or not the crime prevention mode is set or the occurrence of an error is provided, the setting state of the crime prevention mode and the presence or absence of an error can be visually grasped.

According to the thirteenth aspect of the invention, since the predetermined setting operation for setting the crime prevention mode can be enabled or disabled in advance, by disabling the predetermined setting operation in advance, the crime prevention mode can be set unintentionally by an erroneous operation. You can prevent it from happening.

1 is a conceptual diagram showing a wireless communication system according to a first embodiment of the present invention (common with the second embodiment); FIG. Block diagram showing the same wireless communication system Flowchart showing control when security mode is set in the same wireless communication system 10 is a flow chart showing control during authentication of an authentication code in the same wireless communication system (same as the second embodiment) Flowchart showing control when security mode is canceled in the same wireless communication system FIG. 2 is a block diagram showing a wireless communication system according to a second embodiment of the present invention; FIG. Flowchart showing control when security mode is set in the same wireless communication system Flowchart showing control when security mode is canceled in the same wireless communication system Schematic diagram showing operating means on the vehicle side in a wireless communication system according to another embodiment of the present 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, as shown in FIGS. A so-called passive keyless entry device that performs wireless communication and permits starting of the engine, which is the drive source of the vehicle, or enables the vehicle to run when the authentication code acquired by the in-vehicle unit 1 is a regular authentication code. It consists of

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

The control means 14 is formed with a storage means 15 capable of storing an authentication code unique to the vehicle, and can be operated by being supplied with power from the battery D or the coil K when the immobilizer function is activated. is received by the low-frequency antenna G1, the vehicle-specific authentication code can be wirelessly transmitted by the high-frequency antenna G2.

The in-vehicle unit 1 is mounted on a vehicle (the body of a two-wheeled vehicle in this embodiment), and as shown in FIG. and can wirelessly transmit an access signal to the portable device 2 by operating the access button 1a. As shown in FIG. 2, the vehicle-mounted unit 1 includes an access button 1a and a lock bar L, a control means 3, a motor M capable of driving the lock bar L (see FIG. 1), a low-frequency antenna F1, and a high frequency antenna F2.

The motor M is electrically connected to a battery 9 mounted on the vehicle via a power supply control driver 10, is controllable by a motor driver 11, and is capable of moving the lock bar L. The lock bar L has a lock position where it is inserted into a lock hole (not shown) formed in the handlebar of the vehicle to lock the handlebar, and an unlock position where it retreats from the lock hole and unlocks the handlebar. It is possible to move between

That is, when the lock bar L is in the locked position, the handlebars are locked so that the vehicle cannot run, and when the lock bar L is in the unlocked position, the handlebars are unlocked and the vehicle can be started. It makes running possible. Further, the position of the lock bar L can be detected by the position detection sensor 16, and the position of the lock bar L (lock position or unlock position) detected by the position detection sensor 16 is transmitted to the control means 3. It is 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, so that the low-frequency antenna F1 generates a low-frequency signal. Control based on transmission and reception of high-frequency signals by the high-frequency antenna F2 is possible. In addition, the control means 3 is electrically connected to the access button 1a (operation means). (intelligent power device) 18 or the like.

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 or not the received authentication code is a legitimate authentication code on the condition that the authentication code composed of a high-frequency signal wirelessly transmitted from the portable device 2 is received by the high-frequency antenna F2. setting means 5 for setting the crime prevention mode; canceling means 6 for canceling the crime prevention mode; immobilizer control means 7 for starting the immobilizer function; means 8;

The determination means 4 is formed in the control means 3 arranged in the vehicle-mounted unit 1, and determines that the authentication code is valid on the condition that the authentication code transmitted from the portable device 2 is received by the high-frequency antenna F2. It is possible to determine whether it is an authentication code or not. When the determination means 4 determines that the received authentication code is valid, the control means 3 controls the motor M to drive the lock bar L when the lock bar L is in the locked position. is moved to the unlocked position, and a permission signal is transmitted to the ECU 17 to permit starting of the engine (driving source) (for example, permit operation of the starter). On the other hand, when the determination means 4 determines that the received authentication code is not valid, the motor M is not driven and the permission signal to the ECU 17 is not transmitted.

Here, the radio communication system according to the present embodiment can set a crime prevention mode in which at least the in-vehicle unit 1 stops the access signal transmission function by a predetermined setting operation. Specifically, when a specific operation (for example, a "long press operation" or a "continuous press operation" that is different from a normal operation) is performed on the access button 1a (operation means) of the in-vehicle unit 1, A security mode is set by the setting means 5, and at least the in-vehicle unit 1 is configured to stop the access signal transmission function. As a result, when the security mode is set, even if the access button 1a is pressed, an access signal (low-frequency signal) is not transmitted from the low-frequency antenna F1 of the in-vehicle unit 1. Therefore, reception of the access signal by is not performed.

In the crime prevention mode, it is sufficient to stop at least the access signal transmission function of the in-vehicle unit 1, and in addition to stopping the access signal transmission function of the in-vehicle unit 1, the authentication code transmission function of the portable device 2 is stopped (that is, the in-vehicle unit 1). 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 security mode is not limited to a specific operation on the access button (operation means) of the vehicle unit 1 as in this embodiment, but the operation button 2a (operation unit) of the portable device 2 A specific operation (for example, a “long press operation” or a “continuous press operation” that is different from a normal operation) may be performed.

The canceling means 6 can cancel the security mode by performing a predetermined canceling operation on the operation button 2a (operation unit) of the portable device 2 . Then, by canceling the crime prevention mode, the function of transmitting the access signal by the vehicle-mounted unit 1 (in this embodiment, in addition to the function of transmitting the access signal, the function of transmitting the authentication code by the portable device 2) 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 canceling the security 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, but the access button 1a (operation means) on the vehicle unit 1 Specific operations (for example, "long press operation" or "continuous press operation" that are different from normal operations), operation means separately provided in the in-vehicle unit 1 or the vehicle (hidden operation that is difficult for a third party to visually recognize) (preferably an operating means arranged at a position).

Further, in this embodiment, when setting the security mode, the control means 3 generates a random number code and stores it in the storage means 8 of the vehicle-mounted unit 1 and the storage means 15 of the portable device 2, respectively, and the release operation is performed. When it is detected, the random number code stored in the storage means 15 of the portable device 2 and the random number code stored in the storage means 8 of the in-vehicle unit 2 are collated, and the security mode is released only when the random number codes match. It is designed to

The immobilizer control means 7 operates on the condition that, for example, the access button 1a of the in-vehicle unit 1 is subjected to a predetermined operation (specific operation different from the operation for transmitting the access signal or the operation for setting the crime prevention mode). , 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 the portable device 2 is brought close to the vehicle-mounted unit 1, a specific operation is performed on the access button 1a. , the immobilizer control means 7 operates to transmit a low frequency to the portable device 2 to generate electric power in the coil K, and the electric power can be used to wirelessly transmit the authentication code.

Further, the portable device 2 according to the present embodiment is provided with an LED 2b as a notification means, and the LED 2b can light up or blink when the crime prevention mode is set. Thereby, it is possible to notify that the security mode is set by lighting or blinking of the LED 2b. In this way, the LED 2b (informing means) not only informs whether or not the security mode is set, but also informs of errors (such as errors in generating random numbers, errors in communication between the in-vehicle unit 1 and the portable device 2, etc.). ) may be notified. In addition, such notification means is not limited to the LED 2b provided in the portable device 2, other display means provided in the portable device 2, display means such as an LED provided in the in-vehicle unit 1, and further, It may be an attached display means (for example, a meter panel, a separate liquid crystal display panel, etc.).

Next, the contents of control when setting the security mode in the wireless communication system according to this embodiment will be described based on the flowchart of FIG.
First, in S1, it is determined whether or not a predetermined setting operation (in this embodiment, a specific operation on the access button 1a) for setting the crime prevention mode has been performed, and it is determined that the predetermined setting operation has been performed. Then, the process proceeds to S2, a random number code is generated by the control means 3, 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 means 8 of the vehicle-mounted unit 1 and the storage means 15 of the portable device 2 in S3, the random number code is normally stored in the storage means 8 of the vehicle-mounted unit 1 in S4. In S5, it is determined whether or not the random number code is normally stored in the storage means 15 of the portable device 2. FIG. If it is determined in either S4 or S5 that the random number code is not stored normally, the security mode setting is canceled in S7, and it is determined in both S4 and S5 that the random number code has been stored normally. Then, the process proceeds to S6, and the security mode is set by the setting means 5. FIG.

Next, the contents of control when authenticating an authentication code in the wireless communication system according to this embodiment will be described based on the flowchart of FIG.
First, in S1, it is determined whether or not the access button 1a has been operated (one-time pressing operation). be judged. If it is determined in S2 that the security mode is not set, the process proceeds to S3, in which the access signal is wirelessly transmitted by the low-frequency antenna F1, and in S4, the authentication code from the portable device 2 is transmitted by the high-frequency antenna F2. receive.

Then, in S5, the determination means 4 determines whether or not the authentication code from the portable device 2 is a valid authentication code. to allow the engine (driving source) to start. Further, in the present embodiment, in addition to transmitting the permission signal to the ECU 17 in S6, when the lock bar L is in the locked position, the motor M is driven to move the lock bar L to the unlocked position, thereby enabling the vehicle to run. I have to.

On the other hand, if it is determined in S2 that the crime prevention mode is set, the following S3 to S6 are skipped, so that the function of transmitting the access signal from the vehicle-mounted unit 1 is stopped. Further, when it is determined in S5 that the authentication code from the portable device 2 is not a regular authentication code, S6 is skipped, so that the engine (driving source) cannot be started and the lock bar L is not unlocked by

Next, the contents of control when canceling the crime prevention mode in the wireless communication system according to this embodiment will be described with reference to the flowchart of FIG.
First, in S1, it is determined whether or not the operation button 2a of the portable device 2 has been pressed (predetermined release operation). Receive a 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 means 15 of the portable device 2 is wirelessly transmitted through the high-frequency antenna G2, and the random number code is transmitted to the high-frequency antenna F2 of the vehicle-mounted unit 1. It is said that it can be received by

Thereafter, in S3, the random number code stored in the storage means 8 of the vehicle-mounted unit 1 and the random number code transmitted from the portable device 2 are collated by the control means 3, and it is determined whether or not these random number codes match. be done. As a result of collating the random number codes, if it is determined that the random number codes match, the process advances to S4, where the security mode is canceled by the releasing means 6, and if it is determined that the random number codes do not match. , S5, the security mode is not released by the releasing means 6, and the security mode setting is continued.

When the access button 1a of the in-vehicle unit 1 is operated normally (one push operation) after the security mode is released, an access signal is transmitted from the low-frequency antenna F1 of the in-vehicle unit 1, thereby Alternatively, when the crime prevention mode is released, an access signal is automatically transmitted from the low-frequency antenna F1 of the vehicle-mounted unit 1, and the portable device 2 The determination means 4 may determine the authentication code from .

In this way, when it is necessary to operate the access button 1a after the security mode is released, the crime prevention effect can be enhanced, and when the authentication code is automatically judged, the operability can be improved. can be done. Further, it is preferable to optionally select between the control that requires the operation of the access button 1a and the control that automatically determines the authentication code after the security mode is released.

Next, a radio communication system according to a second embodiment of the present invention will be described.
As in the first embodiment, the wireless communication system according to the second embodiment includes a portable device 2 (electronic key) carried by a passenger and a vehicle such as a two-wheeled vehicle, as shown in FIGS. wireless communication with the in-vehicle unit 1, and if the authentication code acquired by the in-vehicle unit 1 is a regular authentication code, it permits starting of the engine, which is the drive source of the vehicle, or enables the vehicle to run. It consists of a so-called passive keyless entry device. In addition, the same code|symbol is attached|subjected to the component similar to 1st Embodiment, and those detailed description is abbreviate|omitted.

In the radio communication system according to this embodiment, the setting means 5 and the canceling means 6 in the first embodiment are formed in the control means 14 of the portable device 2 (electronic key). Here, the radio communication system according to the present embodiment can set a crime prevention mode in which at least the portable device 2 stops transmitting the authentication code by a predetermined setting operation. Specifically, when a specific operation (for example, a "long press operation" or a "continuous press operation" that is different from normal operations) is performed on the operation button 2a (operation unit) of the portable device 2, A security mode is set by the setting means 5, and at least the function of transmitting the authentication code by the portable device 2 is stopped. As a result, when the security mode is set, the access button 1a is pressed to transmit an access signal from the low-frequency antenna F1 of the vehicle-mounted unit 1, and the access signal is received by the low-frequency antenna G1 of the portable device 2. Even if it does, the authentication code (high-frequency signal) will not be transmitted from the high-frequency antenna G2 of the portable device 2 .

In the security mode, it is sufficient to stop at least the authentication code transmission function of the portable device 2, and in addition to the authentication code transmission function of the portable device 2, the vehicle-mounted unit 1 stops the access signal transmission function (that is, the vehicle-mounted unit Both the function of transmitting the access signal and the function of transmitting the authentication code by the portable device may be stopped). Further, the predetermined operation for setting the security 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, but an access button (operation means) of the vehicle-mounted unit 1. A specific operation (for example, a “long press operation” or a “continuous press operation” that is different from a normal operation) may be performed.

The canceling means 6 can cancel the security mode by performing a predetermined canceling operation on the operation button 2a (operation unit) of the portable device 2 . Then, by canceling the security mode, the function of transmitting the authentication code by the portable device 2 (in this embodiment, in addition to the function of transmitting the authentication code, the function of transmitting the access signal by the in-vehicle unit 1) 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 canceling the security 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, but the access button 1a (operation means) on the vehicle unit 1 Specific operations (for example, "long press operation" or "continuous press operation" that are different from normal operations), operation means separately provided in the in-vehicle unit 1 or the vehicle (hidden operation that is difficult for a third party to visually recognize) (preferably an operating means arranged at a position).

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

Further, the portable device 2 according to the present embodiment is provided with an LED 2b as a notification means, and the LED 2b can light up or blink when the crime prevention mode is set. Thereby, it is possible to notify that the security mode is set by lighting or blinking of the LED 2b. In this manner, the LED 2b (notifying means) may notify the occurrence of an error in addition to notifying whether or not the security mode is set. In addition, such notification means is not limited to the LED 2b provided in the portable device 2, other display means provided in the portable device 2, display means such as an LED provided in the in-vehicle unit 1, and further, It may be an attached display means (for example, a meter panel, a separate liquid crystal display panel, etc.).

Here, in this embodiment, a selection means 19 is provided which can enable or disable a predetermined setting operation for setting the crime prevention mode in advance. The selection means 19 comprises, for example, an operation switch or the like provided on the in-vehicle unit 1, the portable device 2, or the vehicle. can be preset to be enabled or disabled.

Next, the contents of control when setting the crime prevention mode in the wireless communication system according to this embodiment will be described based on the flowchart of FIG.
When a predetermined setting operation for setting the security mode (in this embodiment, a specific operation on the operation button 2a (operation unit) of the portable device 2) is performed, the setting is performed by the selection means 19 on the in-vehicle unit 1 side. It is determined whether or not the operation is valid (S1), and if it is valid, the process proceeds to S2, and a security code signal is wirelessly transmitted to the portable device 2 through the low-frequency antenna F1.

On the portable device 2 side, when the security code signal is received by the low-frequency antenna G1 of the portable device 2 in S3, it is determined whether or not the received security 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. After that, the process proceeds to S6, where the security mode is set by the setting means 5, and the process proceeds to S7, where the LED 2b arranged in the portable device 2 or a separate display means informs that the security mode has been set. . 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 determined whether or not the crime prevention mode setting signal is received on the in-vehicle unit 1 side (S9). Subsequently, the fact that the crime prevention mode has been set is reported by means of an LED arranged on the vehicle-mounted unit 1 or a separate display means. If it is determined in S1 that the setting operation is disabled by the selection means 19, S2, S9 and S10 are skipped, and in S9 it is determined that the crime prevention mode setting signal has not been correctly received. In this case, S10 is skipped.

Next, the contents of control when canceling the crime prevention mode in the wireless communication system according to this embodiment will be described with reference to the flow charts of FIGS. 8 and 4. FIG.
When a pressing operation (predetermined release operation) is performed on the operation button 2a of the portable device 2, it is determined at Sa whether or not a release operation has been performed. The security mode is released by , and if there is no release operation, the process proceeds to Sc to continue the security mode. After the security mode is released at Sb, when the access button 1a is operated, the same control A as in the first embodiment is performed.

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

Then, in S5, the determination means 4 determines whether or not the authentication code from the portable device 2 is a valid authentication code. to allow the engine (driving source) to start. Further, in the present embodiment, in addition to transmitting the permission signal to the ECU 17 in S6, when the lock bar L is in the locked position, the motor M is driven to move the lock bar L to the unlocked position, thereby enabling the vehicle to run. I have to.

On the other hand, if it is determined in S2 that the crime prevention mode is set, the following S3 to S6 are skipped, so that the function of transmitting the access signal from the vehicle-mounted unit 1 is stopped. Further, when it is determined in S5 that the authentication code from the portable device 2 is not a regular authentication code, S6 is skipped, so that the engine (driving source) cannot be started and the lock bar L is not unlocked by

According to the above-described first and second embodiments, the transmission function of the access signal by the vehicle-mounted unit 1 (first embodiment) or the authentication code by the portable device 2 (second embodiment) is activated by a predetermined setting operation. Since it is possible to set a crime prevention mode to stop, it is possible to reliably prevent fraudulent acts such as so-called relay attacks just by stopping the transmission function, thereby improving the crime prevention effect while avoiding the complication of signal processing. can be made In the crime prevention mode, if both the access signal transmission function of the in-vehicle unit 1 and the authentication code transmission function of the portable device 2 are stopped, both the access signal transmission function and the authentication code transmission function are stopped. The crime prevention 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 on-vehicle unit 1, a new separate operation means for setting the crime prevention mode is provided. Since the security mode can be set without taking out the portable device 2, the operability can be improved. Further, if the predetermined setting operation for setting the crime prevention mode consists of a specific operation on the operation button 2a (operation unit) of the portable device 2, the setting operation can be performed from a remote location. Operability can be further improved.

Furthermore, the crime prevention mode can be canceled by performing a predetermined release operation on the operation button 2a (operation unit) of the portable device 2. It is possible to reliably prevent a third party from performing the release operation, and further improve the crime prevention effect. Further, if the crime prevention mode can be canceled by performing a predetermined release operation on the access button 1a (operation means) of the vehicle-mounted unit 1, a separate new operation means for canceling the crime prevention mode is provided. Since there is no need to provide it, it is possible to suppress the manufacturing cost from increasing, and the security mode can be canceled without taking out the portable device 2, so that the operability can be improved.

In addition, according to the present embodiment, when the operation button 2a (operation unit) of the portable device 2 is operated to release, the security mode can be released and the turn signal S of the vehicle can be flashed. can be used for both the operation of canceling the crime prevention mode and the operation of flashing the turn signal S of the vehicle to activate the answer callback.

Furthermore, when setting the security mode, a 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. The random number code stored in 15 is collated with the random number code stored in the storage means 8 of the vehicle unit 1, and only when these random number codes match, the security mode is released, so the random number code collation has a crime prevention effect. can be maintained.

Furthermore, the in-vehicle unit 1 according to the present embodiment has an immobilizer function capable of transmitting a low frequency to the portable device 2 to generate power, and using the generated power to wirelessly transmit the authentication code. It is possible to smoothly respond to emergencies such as running out of battery. In addition, since the portable device 2 (which may be the in-vehicle unit 1) is provided with an LED 2b (informing means) capable of informing that the crime prevention mode is set, when the passenger leaves the vehicle, the crime prevention mode is switched off. The setting state can be visually recognized. Note that the notification means may be other display means provided in the vehicle.

Although the present embodiment has been described above, the present invention is not limited to this. It may be possible to perform a predetermined release operation to release the . In this case, the operating means on the vehicle side may be a switch M1 or a switch M2 disposed in a handle switch case C attached to the handle bar H of the vehicle, as shown in FIG. In addition, the symbol G in the figure indicates a grip that can be gripped by the driver.

The switch M1 consists of a cross key that can be pressed vertically and horizontally to display a menu on the vehicle's display means (a meter panel, a separate liquid crystal display means, etc.), and select items related to the crime prevention mode from the menu. The security mode may be set or canceled by selecting and determining with the switch M1. Further, the switch M2 is composed of an operation button that can be operated by pressing, and the crime prevention mode may be set or released by pressing the operation button.

In this manner, when a predetermined setting operation for setting the crime prevention mode or a predetermined cancellation operation for canceling the crime prevention mode is enabled for the operation means on the vehicle side attached to the vehicle, the crime prevention mode is set. A predetermined setting operation or a predetermined canceling operation for canceling the crime prevention mode can be performed at any position on the vehicle, and operability can be improved. In particular, since the operation means on the vehicle side is arranged in the handle switch case C attached to the handlebar H of the vehicle, a predetermined setting operation for setting the crime prevention mode or a predetermined release operation for canceling the crime prevention mode is performed. It is possible to further improve the performance.

In addition, for example, when the determination means 4 determines that the authentication code is a valid authentication code, a permission signal is transmitted to the ECU 17 as in the present embodiment to permit starting of the engine (driving source) of the vehicle, and Instead of allowing the vehicle to run with the lock bar L in the unlocked position, it transmits a permit signal to the ECU 17 exclusively to permit the engine (driving source) of the vehicle to start, or the lock bar is exclusively used. The vehicle may be allowed to run with L being the unlocked position.

Further, when the operation button 2a of the portable device 2 is operated to release, the crime prevention mode is released, the turn signal of the vehicle is flashed, and the answer callback is activated instead of activating the answer callback. It may not be activated, or it may be configured such that other functions are activated when the crime prevention mode is released. Furthermore, it may be one that does not have an immobilizer function, or one that does not have an informing means such as the LED 2b. Although the present embodiment is applied to a two-wheeled vehicle, it may be applied to other vehicles such as ATVs, snowmobiles, construction or agricultural machines, and automobiles.

By performing a predetermined setting operation, it is possible to set a crime prevention mode in which the function of transmitting an access signal by the in-vehicle unit or an authentication code by the portable device is stopped, and a predetermined release operation is performed on the operation unit of the portable device. When the security mode is set, a random number code is generated and stored in the storage means of the in-vehicle unit and the portable device, respectively, and the release operation is performed on the operation unit of the portable device. is performed, the random number code stored in the storage means of the portable unit and the random number code stored in the storage means of the vehicle-mounted unit are collated, and the security mode is released only when these random number codes match. As long as it is a communication system, it may have a different external shape or may have other functions.

1 In-vehicle unit 1a Access button (operating means)
2 Portable device 2a Operation button (operation unit)
2b LED (notifying means)
3 Control Means 4 Judgment 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 device)
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 in-vehicle unit that is mounted on a vehicle and has operation means that can be arbitrarily operated by a passenger, and that can wirelessly transmit an access signal by operating the operation means;
a portable device that can be carried by a passenger and that can wirelessly transmit a vehicle-specific authentication code on condition that the access signal is received;
determination means capable of determining whether or not the authentication code is a valid authentication code on the condition that the authentication code is received;
and capable of permitting starting of a vehicle drive source or allowing the vehicle to run when the determining means determines that the authentication code is a valid authentication code,
By a predetermined setting operation, it is possible to set a crime prevention mode in which the function of transmitting the access signal by the vehicle-mounted unit or the authentication code by the portable device is stopped, and the operation unit of the portable device is released in a predetermined manner. When the security mode is set, a random number code is generated and stored in the storage means of the in-vehicle unit and the portable device, respectively, and the security mode is set. When the release operation is performed on the operation unit of the, the random number code stored in the storage means of the portable device and the random number code stored in the storage means of the in-vehicle unit are collated, and these random number codes are A wireless communication system , wherein the security mode is released only when the two match . 2. The radio communication system according to claim 1, wherein said security mode suspends both the function of transmitting said access signal by said in-vehicle unit and the function of transmitting said authentication code by said portable device. 3. The wireless communication system according to claim 1, wherein said predetermined setting operation comprises a specific operation for said operation means of said vehicle-mounted unit. 3. The wireless communication system according to claim 1, wherein said predetermined setting operation comprises a specific operation on an operation unit of said portable device. If the determination means determines that the authentication code is a valid authentication code, the driving source of the vehicle is permitted to start. The radio communication system according to any one of claims 1 to 4, characterized in that: When the determination means determines that the authentication code is a valid authentication code, the lock bar for locking the handlebars of the vehicle is set to the unlocked position so that the vehicle can run. The radio communication system according to any one of claims 1 to 4, characterized in that: 7. The wireless communication system according to claim 6, wherein when the release operation is performed on the operation unit, the crime prevention mode is released and the turn signal of the vehicle can be flashed. 3. The radio communication system according to claim 1, wherein said predetermined setting operation for setting said crime prevention mode is made possible with respect to operation means on the vehicle side attached to said vehicle. 9. The wireless communication system according to claim 8, wherein said operating means on the vehicle side is arranged in a handle switch case attached to a handlebar of the vehicle. 10. The radio communication system according to claim 9, wherein said operation means on the vehicle side comprises a cross key which can be pressed in the left/right and up/down directions to select and determine the display on the display means. 11. The in-vehicle unit has an immobilizer function capable of transmitting a low frequency to the portable device to generate power, and using the power to wirelessly transmit the authentication code. 10. A wireless communication system according to claim 1. The wireless communication system according to any one of claims 1 to 11, further comprising notifying means capable of notifying whether the security mode is set or whether an error has occurred. 13. The radio communication system according to claim 1, wherein said predetermined setting operation for setting said security mode can be enabled or disabled in advance.

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