JP2010136015A - Portable unit and vehicular communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular communication system capable of permitting control of an on-board apparatus with excellent security capability even when battery exhaustion occurs in a portable unit in spite of having a low-cost structure. <P>SOLUTION: The portable unit 2 executes radio communication with a communication control device 3 mounted to a vehicle 4, and permits the start of an engine by an engine control device 40 mounted on the vehicle 4, subject to establishment of electromagnetic authentication by checking an identification code via the radio communication. The vehicular communication system is structured such that: an electronic paper device 26 as an image display device is arranged on the portable unit 2; optical authentication is executed through a camera device 34 provided for the communication control device 3 by displaying the image of the identification code on the electronic paper device 26, and the start of the engine by the engine control device 40 is permitted subject to the establishment of the optical authentication. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable device possessed by a user of a vehicle and an in-vehicle communication system. More specifically, the present invention performs wireless communication with a communication control device provided in the vehicle and is subject to the establishment of authentication through the wireless communication. The present invention relates to a portable device capable of controlling an in-vehicle device mounted on a vehicle, and an in-vehicle communication system including the portable device.

  In recent years, in vehicles such as four-wheeled vehicles, there has been a strong demand for improving the convenience of users of the vehicle as well as further improving the security level (safety and theft prevention). Therefore, conventionally, wireless communication is performed for electromagnetic authentication of the ID code of the portable device between the portable device (electronic key) possessed by the user and the communication control unit provided in the vehicle. A remote keyless entry (RKE) system that permits a door lock / unlock operation when authentication is established has been proposed (see, for example, Patent Document 1).

  In this remote keyless entry system (hereinafter referred to as “RKE system”), the engine is permitted to start when the ID code authentication is established, in addition to the door locking / unlocking operation permission technology on condition that the electromagnetic authentication is established. So-called immobilizer technology has also been introduced. And in this RKE system, the one-way (unidirectional) communication from a portable machine to a vehicle is normally employ | adopted.

The radio wave transmitted from the portable device to the vehicle includes an ID code, a switch operation code (command code) generated by operating an operation switch provided on the portable device, and a further increase in the security level of the vehicle. A “rolling code” in which a rolling counter (value) that changes with each operation of the operation switch is coded is included.
JP 2008-205702 A

  However, in order to use the immobilizer technology, an immobilizer-dedicated antenna or communication circuit is required for the vehicle, and a transponder circuit (for connecting an external device and an external device) for wirelessly transmitting an ID code or the like to the vehicle without a power source is also transmitted to the portable device. In some cases, an electric circuit that generates electric power by electromagnetic coupling) may be required, leading to an increase in cost.

On the other hand, recently, a high-performance imaging camera device capable of resolving a fine image has been provided as standard in a vehicle for the purpose of biometric authentication such as a driver's face, fingerprint, palm vein, etc. is there.
The present invention has been made to solve the above-described problems, and its purpose is to permit control of in-vehicle devices with good security even when the battery runs out while having a low-cost configuration. It is an object of the present invention to provide a portable device that can perform the above-described operation and a vehicle communication system including the portable device.

  In order to solve the above-mentioned problems, the invention according to claim 1 performs electromagnetic communication with a communication control device provided in a vehicle and performs electromagnetic authentication by collating an identification code through the wireless communication. In a portable device capable of controlling on-vehicle equipment mounted on the vehicle on the condition that it is established, an electronic paper device as an image display device is provided in the portable device, and the electronic paper device displays an image of the identification code. Thus, the gist is that optical authentication is performed via an imaging device provided in the communication control device, and that the in-vehicle device can be controlled on condition that the optical authentication is established.

  According to the configuration, the portable device can be effectively used in the vehicle by effectively using the imaging device mounted on the vehicle and using the identification code displayed on the electronic paper device even when the battery runs out of the portable device. It is possible to control the in-vehicle device mounted on the vehicle on condition that the optical authentication is established.

  According to a second aspect of the present invention, in the portable device according to the first aspect, the in-vehicle device that can be controlled on condition that the optical authentication is established is an engine control device that permits starting of the engine of the vehicle. It is a summary.

  According to this configuration, since the start of the vehicle engine is permitted on condition that optical authentication of the portable device is established, the vehicle does not require an antenna or communication circuit dedicated to the immobilizer, and the portable device is attached to the vehicle. Therefore, a transponder circuit for wirelessly transmitting an ID code or the like without a power source becomes unnecessary, and thus an immobilizer technology can be introduced into a vehicle at a low cost.

  According to a third aspect of the present invention, in the portable device according to the first or second aspect, a battery as a driving power source thereof, a battery remaining amount detecting means for detecting a remaining amount of the battery, and the remaining battery amount A microcomputer for recognizing a remaining battery level through a detecting unit and controlling an image display state of the electronic paper device; and the microcomputer controls the electronic paper device when the remaining battery amount exceeds a predetermined amount. While displaying required information as an image and performing electromagnetic authentication of the portable device via the wireless communication, the electronic paper device is provided with the identification code triggered by a decrease in the remaining battery level to a predetermined amount. The gist is that the two-dimensional barcode including the image is displayed.

  According to this configuration, when the remaining battery level of the portable device exceeds a predetermined amount, the electronic paper device displays an image of necessary information. On the other hand, the portable device runs out of battery, or the battery runs out. When the remaining amount drops to a predetermined amount, the electronic paper device can display an image of a two-dimensional barcode that includes an identification code and that can be easily captured by the imaging device.

  According to a fourth aspect of the present invention, in the portable device according to the third aspect, the microcomputer is provided in the portable device and can control a power supply state to a wireless communication device that performs wireless communication with the communication control device. The gist of the invention is that the electronic paper device displays an image of the identification code and the power of the wireless communication device is turned off when the remaining battery level is reduced to a predetermined amount. .

  According to this configuration, the wireless communication with the vehicle by the wireless communication device can be stopped when the remaining battery level of the portable device has decreased to a predetermined amount, and the identification code is displayed on the electronic paper device as an image. When optical authentication via an electronic paper device can be used, waste of electromagnetic authentication via wireless communication can be eliminated.

  According to a fifth aspect of the present invention, in the portable device according to the third or fourth aspect, an operation switch that is operated by a vehicle user and whose operation state is detected by the microcomputer is provided, and the identification code The gist is that an ID code of the portable device and a rolling code obtained by encoding a rolling counter that is incremented every time the operation switch is operated are included.

  According to this configuration, since the identification code includes the ID code of the portable device and the rolling code corresponding to the number of operations of the operation switch, the identification code is sequentially changed on the vehicle side in order to establish authentication of the identification code. Therefore, even if the identification code displayed on the electronic paper device is illegally read, the security level is secured.

  The invention according to claim 6 performs wireless communication with the portable device according to any one of claims 1 to 5 and collates the identification code through the wireless communication. A communication control device that enables control of the in-vehicle device mounted on the vehicle on condition that the electromagnetic authentication is established, and the in-vehicle device that can be controlled on condition that the optical authentication is established. The gist of the invention is that the engine control device permits the start of the engine of the vehicle.

  According to this configuration, the image pickup device mounted on the vehicle is effectively used, and even when the battery runs out in the portable device, the identification code displayed on the electronic paper device is used in the vehicle. Since the optical authentication of the portable device is performed and the vehicle engine is allowed to start on the condition that the optical authentication is established, the vehicle does not require an antenna or communication circuit dedicated to the immobilizer, and the portable device Since a transponder circuit for wirelessly transmitting an ID code or the like to a vehicle without a power source is not required, immobilizer technology can be introduced into the vehicle at a low cost.

  ADVANTAGE OF THE INVENTION According to this invention, even when a battery runs out in a portable device, it is possible to permit control of in-vehicle devices with good security even though the configuration is low cost.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings.
As shown in FIG. 1, the vehicle communication system 1 of the present embodiment employs an RKE system, and a portable device 2 (transmission side) possessed by a user of the vehicle 4 and communication provided in the vehicle 4. It is comprised from the control apparatus 3 (reception side), and the one-way (unidirectional) radio | wireless communication is performed toward the vehicle 4 from the portable device 2. As shown in FIG.

  The portable device 2 functions as a portable device-side microcomputer 23, a wireless transmitter (transmitter) 24 as a wireless communication device having a transmission antenna 25, and an image display device. And an electronic paper device 26. A driving current is supplied to the microcomputer 23, the wireless transmitter 24, and the electronic paper device 26 from a cell battery Ve as a driving power source. In the wireless transmitter 24, supply current control is performed by the microcomputer 23. Further, the electronic paper device 26 includes an image display unit including a plurality of pixels arranged in a matrix and a driver for driving the image display unit (all not shown).

  Further, in the portable device 2, the microcomputer 23 is electrically provided with a battery remaining amount detection device 27 as battery remaining amount detecting means for detecting the remaining amount of the cell battery Ve based on the voltage value between the + and − electrodes. It is connected and can recognize the remaining battery level. The battery remaining amount detection device 27 is always supplied with driving power from the cell battery Ve.

  The electronic paper device 26 is controlled by the microcomputer 23 and displays an image of necessary information such as the remaining battery level obtained via the remaining battery level detection device 27, or the ID of the portable device 2 as will be described later. A code or a rolling code is displayed as an encrypted Sk code (identification code).

  Specifically, the electronic paper device 26 is a conventionally well-known self-writing type that can display predetermined information on the image display unit in a voltage-applied state and can hold the information in a non-powered state. Thus, in the state where no voltage is applied to each pixel electrode constituting the matrix in the image display unit via the driver, the negatively charged white particles accumulate on the back side of the image display unit, while The black particles charged to (+) remain on the surface side, and when the image display portion is viewed from the surface side, the image display portion is colored black. When the driver operates based on the electronic data output from the microcomputer 23 and the polarity of the pixel electrode in the required portion of the matrix is inverted according to the information to be displayed, the positional relationship between the white particles and the black particles is appropriately determined. In other words, information based on the contrast between the white particles and the black particles is displayed on the image display unit. Further, the electronic paper device 26 can maintain the image display state as it is even in a non-powered state in which no voltage is applied to each pixel electrode constituting the matrix in the image display unit via the driver.

  Then, the Sk code image-displayed by the electronic paper device 26 in this manner in the portable device 2 is captured in the vehicle 4 by the camera device 34 in an encrypted state as will be described later. The optical authentication is done.

  In addition, the portable device 2 is provided with a button-type unlocking switch 21 and a locking switch 22 as operation switches operated by a user of the vehicle 4 so as to be pressed on the surface, and is electrically connected to the microcomputer 23, respectively. ing.

  When the unlocking switch 21 and the locking switch 22 are pressed at a point separated from the vehicle 4, a switch operation that is an unlocking code or a locking code from the wireless transmitter 24 of the portable device 2 toward the vehicle 4. When a switch operation request signal (radio wave) including a code is transmitted and electromagnetic authentication is established, the door of the vehicle 4 can be remotely unlocked / locked.

  As shown in FIG. 2, the switch operation request signal is constituted by serially integrating an Sk code as an identification code and a switch operation code (SW operation code) made up of either an unlock code or a lock code. An ak code.

  The Sk code is composed of an ID code uniquely set for the portable device 2 and an RCk code (k = 1 to n, n + 1; n and k are natural numbers). This RCk code is obtained by encoding a rolling counter RCk that is incremented (processed) in the microcomputer 23 every time the unlocking switch 21 or the locking switch 22 of the portable device 2 is operated. This is a rolling code corresponding to the number of times the unlock request signal or lock request signal described later is transmitted to the vehicle 4.

  As shown in FIGS. 1 and 2, the ak code is encrypted into an Ak code on the portable device 2 side, modulated by the wireless transmitter 24, and transmitted from the portable device 2 to the vehicle 4 via the transmission antenna 25. Is transmitted wirelessly. Then, it is demodulated into an ak code on the vehicle 4 side, and only the switch operation code is decoded and used for door locking / unlocking control by the in-vehicle device. On the other hand, the Sk code is used for verification of the Sk code on the vehicle 4 side without being decrypted and being encrypted.

  The microcomputer 23 of the portable device 2 includes a memory 23a, and the ID code unique to the portable device 2 is stored in the memory 23a. When the unlock switch 21 or the lock switch 22 is operated, the microcomputer 23 generates the switch operation request signal (ak code), encrypts it, and outputs it to the wireless transmitter 24 as an Ak code.

  Then, the wireless transmitter 24 modulates this Ak code into an RF band radio wave and transmits it to the vehicle 4 via the transmission antenna 25. In the vehicle 4, when the electromagnetic authentication of the portable device 2 is established by checking the ID code included in the Ak code, the door is automatically unlocked or locked based on the unlocking code or the locking code. .

  On the other hand, as shown in FIG. 1, in the vehicle 4, the communication control device 3 is electrically connected to the verification ECU 33 and the verification ECU 33, and is a wireless communication device having a reception antenna 31. A receiver (receiver) 32 and a camera device 34 functioning as an imaging device are provided. The camera device 34 is provided in the vehicle interior of the vehicle 4 such as in the vicinity of the steering wheel for the purpose of biometric authentication such as the driver's face, fingerprint, palm vein, and the like. Optical recognition and optical authentication of a two-dimensional bar code, which will be described later, including an Ak code, are flexibly handled by changing the control program of the verification ECU 33. The communication control device 3 is supplied with driving power from an in-vehicle power supply 42.

  Further, the vehicle 4 is provided with an engine control device 40 that controls starting and stopping of the engine, and a door locking / unlocking device 41 that locks and unlocks a driver's seat door and a luggage door (door) as vehicle-mounted devices. Each of them is electrically connected to the verification ECU 33.

  When the wireless receiver 32 receives an Ak code (radio wave) wirelessly transmitted from the portable device 2 via the receiving antenna 31, the wireless receiver 32 demodulates the signal and outputs the demodulated signal to the verification ECU 33. The verification ECU 33 includes a memory 33a, and the memory 33a stores the same ID code as that of the (regular) portable device 2.

  Then, the collation ECU 33 collates the ID code included in the Sk code with the Sk code being encrypted. That is, when the switch operation request signal input from the wireless receiver 32 includes an ID code that matches the ID code stored in the memory 33a, the verification ECU 33 establishes electromagnetic authentication by wireless communication. In addition, a door unlocking command signal or a door locking command signal is output to the door locking / unlocking device 41 based on the unlocking code or the locking code included in the switch operation request signal. Then, the driver door and the luggage door of the vehicle 4 are unlocked or locked by the door locking / unlocking device 41.

  In this embodiment, when the electromagnetic authentication is established, the verification ECU 33 cancels the engine start prohibition state of the vehicle 4 via the engine control device 40, and operates an engine start switch (not shown). The engine is also starting.

  In the vehicle communication system 1 of the present embodiment, the communication control device 3 of the vehicle 4 can also display the ID code and Rck code (rolling code) as the Sk code on the electronic paper device 26 of the portable device 2. In addition to electromagnetic authentication, optical authentication of the portable device 2 is performed via the camera device 34 provided in the communication control device 3. The engine of the vehicle 4 can be started on condition that the optical authentication is established.

  Specifically, as shown in FIG. 3, in the portable device 2, the remaining battery level of the cell battery Ve is detected by the remaining battery level detection device 27, and the remaining battery level is reduced to a predetermined amount by the portable device side microcomputer 23. It is determined whether or not. When it is determined that the remaining battery level has not decreased to a predetermined amount (the remaining battery level is equal to or greater than the predetermined amount) (in the case of NO), the process proceeds to step S2. On the other hand, when it is determined that the remaining battery level has decreased to a predetermined amount (in the case of YES), as shown in FIG. 4, the process proceeds to step S21 via (1) (step S1).

  As shown in FIG. 3, in step S2, whether or not the unlocking switch 21 or the locking switch 22 is operated is determined. If it is determined that there is an operation (in the case of YES), the process proceeds to step S3, and is not detected. If determined (NO), the operation waiting state is continued (step S2).

Next, in the microcomputer 23, the rolling counter RCn (n is a natural number) is incremented and incremented by +1 (step S3).
Subsequently, in the microcomputer 23, the unique ID code stored in the memory 23a and the RCk code (k is a natural number) are serially integrated to generate the Sk code. Further, the Sk code and the switch The operation code is serially integrated, and an ak code (see FIG. 2) is generated (step S4).

  Thereafter, the microcomputer 23 encrypts the ak code with the encryption function f to create an Ak code (Ak code = f (ak code) = f (Sk code) + f (switch operation code)), and the wireless transmitter 24 (step S5).

  In the wireless transmitter 24, the Ak code is modulated into an RF band radio wave (step S6), and is wirelessly transmitted to the vehicle 4 (communication control device 3) via the transmission antenna 25 (step S7). .

  Subsequently, in the vehicle 4, when the Ak code is received by the wireless receiver 32 via the receiving antenna 31 (step S11), the Ak code is modulated into an electrical signal by the wireless receiver 32 (step S11).

Next, only the switch operation code included in the Ak code is decoded by the verification ECU 33. At this time, the decoding of the Sk code is not performed (step S13).
Next, in the verification ECU 33, the rolling counter RC′n (n is a natural number) is incremented and incremented by +1 (step S14).

  Subsequently, in the verification ECU 33, the unique ID code stored in the memory 33a and the RC′k code (k is a natural number) are serially integrated to generate the Sk ′ code (step S15).

Then, the matching ECU 33 encrypts the Sk ′ code with the same encryption function f as that of the portable device side microcomputer 23 (step S16).
Further, in the collation ECU 33, the Sk ′ code is collated with the Sk code wirelessly transmitted from the portable device 2 in the state included in the Ak code. Here, both codes are collated with each other as encrypted. If both codes match and it is determined that electromagnetic authentication is established (in the case of YES), the process proceeds to step S18. If it is determined that electromagnetic authentication is not established (in the case of NO), here. This process is temporarily terminated (step S17).

  In step S18, the driver 4 or the luggage door of the driver 4 or the luggage door is transmitted by the vehicle 4 based on the switch operation code (unlocking code or locking code) that is wirelessly transmitted from the portable device 2 and included in the Ak code. Locking / unlocking control is allowed. That is, the door is automatically unlocked or locked by the verification ECU 33 and the door locking / unlocking device 41 based on the unlocking code or the locking code (step S18).

Thereafter, in step S19, the engine start is permitted by the verification ECU 33 and the engine control device 40 (step S19).
On the other hand, as described above, when it is determined in step S1 that the remaining battery level has been reduced to a predetermined amount (below the predetermined amount) by the portable device-side microcomputer 23 (in the case of NO), it is shown in FIG. Thus, via (1), the microcomputer 23 includes the Ak code including the Rck code incremented by the previous operation of the operation switch of the portable device 2 by the electronic paper device 26 in the two-dimensional barcode. The image is displayed (step S21).

Thereafter, the microcomputer 23 turns off the drive current of the wireless transmitter 24 supplied from the cell battery Ve (step S22).
In this way, when it is determined in step S1 that the remaining battery level has been reduced to a predetermined amount by the microcomputer 23 (in the case of NO), the power of the wireless transmitter 24 of the portable device 2 is turned off. Therefore, the door of the vehicle 4 cannot be unlocked by electromagnetic authentication via wireless communication. Therefore, the door can be unlocked using a mechanical emergency key equipped in the portable device 2. become.

  Subsequently, in the vehicle 4, the two-dimensional barcode is captured by the camera device 34, and it is determined whether or not the camera device 34 has optically recognized by the verification ECU 33. If it is determined that it is optically recognized (in the case of YES), the process proceeds to step S24. If it is determined that it is not optically recognized (in the case of NO), the recognition waiting state is set. Continue (step S23).

  Then, the verification ECU 33 verifies the Sk ′ code previously encrypted by the encryption function f with the Sk code captured as an image from the portable device 2 while being included in the Ak code. Here, both codes are collated with each other as encrypted. If both codes match and it is determined that optical authentication is established (in the case of YES), the process proceeds to step S25. If it is determined that optical authentication is not established (in the case of NO), here. This process is temporarily terminated (step S24).

  Note that steps S101 to S106 in the one-dot chain line frame shown in FIG. 4 are the same as steps S11 to S16 processed in the communication control device 3 of the vehicle 4 triggered by the previous operation of the operation switch of the portable device 2. This processing is shown.

  In step S25, the verification ECU 33 and the engine control device 40 permit the engine of the vehicle 4 to be started. That is, the engine is started by operating an engine start switch (not shown) (step S25).

According to this embodiment, the following operations and effects can be obtained.
(1) The Sk code (identification) displayed on the electronic paper device 26 even when the camera device 34 mounted on the vehicle 4 is effectively utilized and the portable device 2 runs out of battery (consumption of the cell battery Ve). Code) is used to perform optical authentication of the portable device 2 in the vehicle 4, and on the condition that the optical authentication is established, control of the engine control device 40 (vehicle equipment) mounted on the vehicle 4, that is, The engine can be permitted to start.

  (2) Since the start of the engine of the vehicle 4 is permitted on condition that the optical authentication of the portable device 2 is established, the vehicle 4 does not require an antenna or communication circuit dedicated to the immobilizer, and the portable device 2 also includes the vehicle. Therefore, a transponder circuit for wirelessly transmitting an ID code or the like toward the vehicle 4 without using a power source is not required, so that the immobilizer technology can be introduced into the vehicle 4 at a low cost.

  (3) Since the Sk code includes the ID code of the portable device 2 and the RCk code (rolling code) corresponding to the number of operations of the unlocking switch 21 or the locking switch 22, the authentication of the Sk code is achieved. Since it is necessary to match the RCk codes that are sequentially changed on the vehicle 4 side, even if the Sk code displayed as a two-dimensional barcode on the electronic paper device 26 is illegally read, A level is secured.

  (4) When the remaining battery level of the cell battery Ve of the portable device 2 exceeds a predetermined amount, the electronic paper device 26 displays an image of required information such as the remaining battery level, while the portable device 2 has run out of the battery. In some cases, the electronic paper device 26 can display an image of a two-dimensional barcode that includes the Sk code and that can be easily captured by the camera device 34.

  (5) Wireless communication with the vehicle 4 by the wireless transmitter 24 can be stopped when the remaining battery level of the cell battery Ve of the portable device 2 is reduced to a predetermined amount, and the Sk code is added to the electronic paper device 26. Therefore, when optical authentication via the electronic paper device 26 can be used, electromagnetic authentication via wireless communication can be eliminated.

The above embodiment may be modified as follows.
In the above embodiment, in the portable device 2, the remaining battery power of the cell battery Ve is reduced to a predetermined amount, and after the two-dimensional barcode (Sk code) image is displayed by the electronic paper device 26, wireless transmission built in the portable device 2 is performed. Although the power of the machine 24 is turned off, the present invention is not limited to this. Even after the two-dimensional barcode image is displayed by the electronic paper device 26, the wireless transmitter 24 is kept powered on, and It is also possible to configure to continue radio transmission of radio waves toward the vehicle 4 (communication control device 3) until the cell battery Ve is completely consumed. Even in such a configuration, each time the operation switch is operated, the rolling code is continuously updated in both the portable device 2 and the vehicle 4 while maintaining the sameness. Therefore, the wireless communication device (the wireless transmitter 24 and the wireless receiver) is maintained. The establishment of electromagnetic authentication via 32) and optical authentication via electronic paper device 26 and camera device 34 are both ensured.

  In the above embodiment, the in-vehicle device that can be controlled on condition that the optical authentication of the portable device 2 is established is the engine control device 40. However, the present invention is not limited to this, and the in-vehicle device includes a door locking / unlocking device 41. And other in-vehicle devices such as a steering lock device may be included.

  In the above-described embodiment, the RKE system that performs unidirectional wireless communication between the portable device 2 and the vehicle 4 (communication control device 3) is adopted. However, the present invention is not limited to this, and the portable device 2 and the vehicle 4 (communication control). An electronic key system that performs bidirectional wireless communication with the device 3) may be employed. According to this, it is possible to further increase the security level by using random numbers generated in the vehicle 4 (communication control device 3) for electromagnetic authentication and optical authentication.

  In the above embodiment, the ID code and the rolling code are encrypted Sk codes, which are used for electromagnetic authentication and optical authentication between the portable device 2 and the vehicle 4 (communication control device 3). However, the present invention is not limited to this, and although the security level is slightly reduced, the ID code or rolling code may be an unencrypted Sk code.

  In the above embodiment, the camera device 34 that is an imaging device is included in the communication control device 3, but the camera device 34 may be provided outside the communication control device 3 in the vehicle 4. Moreover, although the camera device 34 is provided in the room of the vehicle 4, it may be provided outside the vehicle 4 (such as outside the door).

  In the above embodiment, the verification ECU 33 decrypts the radio signal that is encrypted and transmitted wirelessly. However, the present invention is not limited to this, and it may be configured to be performed in the wireless receiver 32.

  In the above embodiment, the ID code and RCk code included in the Sk code are both encrypted and then wirelessly transmitted or image-transmitted toward the vehicle 4 and encrypted in the vehicle 4. However, the present invention is not limited to this. Only one of the ID code and the RCk code is encrypted, wirelessly transmitted or image-transmitted toward the vehicle 4, and the code verification in the verification ECU 33 (electromagnetic authentication) Or optical authentication).

Further, technical ideas that can be grasped from the above-described embodiments and modifications will be described below.
In the portable device according to any one of claims 1 to 3, an operation switch that is operated by a user of the vehicle and whose operation state is detected by a microcomputer is provided. An ID code of the portable device, a rolling code in which a rolling counter incremented for each operation of the operation switch is encoded, and a switch operation code based on the operation content of the operation switch are included in an encrypted state. A portable device.

  According to this configuration, the ID code of the portable device, the rolling code corresponding to the number of operations of the operation switch, and the switch operation code (command code) based on the operation content of the operation switch are included in an encrypted state. In order to establish authentication of the identification code, it is necessary to decrypt the encryption on the vehicle side, so that the security level is further increased.

The functional block diagram which shows the electric constitution of the communication system for vehicles which concerns on embodiment of this invention. Explanatory drawing explaining the structure of the switch operation request signal which concerns on embodiment of this invention, and the flow of the encryption, a modulation | alteration, a demodulation, and a decoding. The flowchart figure which shows the processing flow of the electromagnetic authentication of the communication system for vehicles which concerns on embodiment of this invention. The flowchart figure which shows the processing flow of the optical authentication of the communication system for vehicles which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vehicle communication system, 2 ... Portable machine, 3 ... Communication control apparatus, 4 ... Vehicle, 23 ... Microcomputer, 24 ... Wireless transmitter, 26 ... Electronic paper apparatus, 32 ... Wireless receiver, 40 ... Engine control apparatus ( In-vehicle device), RCk (RCn) ... rolling counter.

Claims (6)

Wireless communication with the communication control device provided in the vehicle, and control of in-vehicle devices mounted on the vehicle is possible on condition that electromagnetic authentication is established by collating the identification code via the wireless communication. Mobile devices
By providing an electronic paper device as an image display device in the portable device and displaying the identification code on the electronic paper device, optical authentication is performed via an imaging device provided in the communication control device. A portable device characterized in that the vehicle-mounted device can be controlled on condition that optical authentication is established. The portable device according to claim 1,
A portable device in which an in-vehicle device that can be controlled on condition that the optical authentication is established is an engine control device that permits starting of an engine of the vehicle. The portable device according to claim 1 or 2,
The battery as the driving power source, the battery remaining amount detecting means for detecting the remaining amount of the battery, the remaining battery amount is recognized through the battery remaining amount detecting means, and the image display state of the electronic paper device is controlled. With a microcomputer to
The microcomputer displays an image of necessary information on the electronic paper device when the battery remaining amount exceeds a predetermined amount and performs electromagnetic authentication of the portable device via the wireless communication, while the battery A portable device configured to display an image of a two-dimensional barcode including the identification code on the electronic paper device when the remaining amount is reduced to a predetermined amount. The portable device according to claim 3,
The microcomputer is configured to be capable of controlling a power supply state to a wireless communication device that is provided in the portable device and performs wireless communication with the communication control device,
A portable device that causes the electronic paper device to display an image of the identification code and to turn off the power of the wireless communication device when the remaining battery level is reduced to a predetermined amount. In the portable device according to claim 3 or claim 4,
An operation switch that is operated by a user of the vehicle and whose operation state is detected by the microcomputer is provided.
The mobile device in which the identification code includes an ID code of the mobile device and a rolling code encoded with a rolling counter that is incremented every time the operation switch is operated. The portable device according to any one of claims 1 to 5 is wirelessly communicated with the portable device, and the establishment of electromagnetic authentication by collating the identification code via the wireless communication is a condition. A communication control device that enables control of in-vehicle devices mounted on the vehicle,
A vehicle communication system, wherein an in-vehicle device that can be controlled on condition that the optical authentication is established is an engine control device that permits starting of an engine of the vehicle.

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