JP3185121U - Two-way communication system - Google Patents

Abstract

A bi-directional communication system that can perform vehicle operation and vehicle information confirmation from outside the vehicle and can ensure security.
An interactive communication system includes an in-vehicle device mounted on a vehicle, a first portable device capable of bidirectional communication with the on-vehicle device, and a second capable of bidirectional communication with the first portable device. And the second portable device 30 has encryption storage means 34 for storing encryption information, and the first portable device 20 is connected to the second portable device 30 by bidirectional communication with the second portable device 30. 30, and the cryptographic information is obtained from the cryptographic storage means 34 by two-way communication with the second portable device 30 on the condition that mutual authentication with the second portable device 30 is established. Bidirectional communication with the vehicle-mounted device 10 is performed using the encrypted information.
[Selection] Figure 1

Description

  The present invention relates to a bidirectional communication system, and more particularly to a bidirectional communication system including an in-vehicle device and a plurality of portable devices mounted on a vehicle.

  2. Description of the Related Art In recent years, a vehicle-mounted device mounted on a vehicle and a portable device capable of bidirectional communication with the vehicle-mounted device, and information on the vehicle from outside the vehicle using bidirectional communication between the vehicle-mounted device and the portable device. 2. Description of the Related Art A two-way communication system that can confirm (hereinafter abbreviated as vehicle information) and can perform operations on a vehicle (hereinafter abbreviated as vehicle operations) has been put into practical use. As an apparatus related to such a bidirectional communication system, an automobile theft prevention apparatus as shown in Patent Document 1 has been proposed. FIG. 11 is an explanatory diagram showing the configuration of the automobile antitheft device according to Patent Document 1. As shown in FIG.

  As shown in FIG. 11, the conventional automobile antitheft device 100 conforms to a short-range wireless communication standard called a vehicle-mounted antitheft device 110 (onboard device), a wireless communication device 111, and Bluetooth (registered trademark). A corresponding on-vehicle Bluetooth module 112, an alarm device 114, a detector 131, and a mobile phone 120 (mobile device) are provided. The vehicle-mounted antitheft device 110, the wireless communication device 111, the vehicle-mounted Bluetooth module 112, the alarm device 114, and the detector 131 are mounted on the vehicle 190. The mobile phone 120 is carried by the owner of the vehicle 190. The vehicle-mounted Bluetooth module 112 and the mobile phone 120 can perform two-way communication using short-range wireless communication.

  In the car anti-theft device 100, when an abnormal situation occurs such as the door of the vehicle 190 being abnormally opened, the detector 131 detects the abnormality and sends an abnormal signal S to the vehicle anti-theft device 110. The vehicle-mounted antitheft device 110 controls the alarm device 114 to generate an alarm sound, and also controls the wireless communication device 111 to transmit an alarm signal to the mobile phone 120 through wireless online.

  Next, the vehicle-mounted Bluetooth module 112 detects the mobile phone 120 within the range of the communication distance r <b> 1, and when the mobile phone 120 is detected, performs mutual authentication with the mobile phone 120 and mutual authentication with the mobile phone 120. Is established, the anti-theft release signal R is transmitted to the vehicle anti-theft device 110. When the vehicle-mounted antitheft device 110 receives the antitheft release signal R, it cancels the antitheft setting.

  In the vehicle antitheft device 100, bidirectional communication using near field communication is performed between the on-vehicle Bluetooth module 112 and the mobile phone 120 in this way. If such a technique is applied, it becomes possible to confirm vehicle information or perform vehicle operations from outside the vehicle using bidirectional communication between the vehicle-mounted device and the portable device.

Utility model registration No. 3105131

  In the conventional car anti-theft device 100, a communication device corresponding to a short-range wireless communication standard called Bluetooth has been used for bidirectional communication between the vehicle-mounted Bluetooth module 112 and the mobile phone 120.

  However, such a communication standard is a standard premised on general communication, and is not a communication standard assuming communication that requires high security such as vehicle information confirmation and vehicle operation. Therefore, when such a communication system is used as it is and vehicle information is confirmed and a vehicle operation is performed, it cannot be said that security is sufficient.

  The present invention has been made in view of the situation of the prior art as described above, and its purpose is bidirectional that can confirm vehicle information and operate a vehicle from outside the vehicle, and can enhance security. It is to provide a communication system.

  In order to solve this problem, the bidirectional communication system according to claim 1 includes an on-vehicle device mounted on a vehicle, a first portable device capable of bidirectional communication with the on-vehicle device, and the first portable device. A second portable device capable of bidirectional communication, wherein the second portable device has encryption storage means for storing encryption information, and the first portable device communicates with the second portable device. To perform the mutual authentication with the second portable device, and on the condition that the mutual authentication with the second portable device is established, the cipher storage means performs the encryption from the encryption storage means by two-way communication with the second portable device. Information is obtained, and bidirectional communication with the vehicle-mounted device is performed using the obtained encryption information.

  In the bidirectional communication system having such a configuration, the second portable device has encryption storage means for storing encryption information. And the 1st portable machine acquires encryption information from encryption storage means by bidirectional communication with the 2nd portable machine, and performs bidirectional communication with onboard equipment using the acquired encryption information. Therefore, the 1st portable machine can acquire vehicle information from onboard equipment, and can transmit a signal about vehicle operation to onboard equipment using bidirectional communications with onboard equipment. When the on-vehicle device and the first portable device perform two-way communication, the vehicle information leaks to an external communication device or the external communication by performing two-way communication with the on-vehicle device using encryption information. It is possible to prevent a vehicle operation from being erroneously performed in response to a signal from the device. Moreover, the first portable device obtains encryption information from the encryption storage means on the condition that mutual authentication with the second portable device is established. Therefore, when using the first portable device for purposes other than bidirectional communication with the vehicle-mounted device, it is possible to prevent information such as encryption information from being leaked to the outside by mistake. It is also possible to prevent vehicle information from being confirmed and operated by a third person who does not have the second portable device. As a result, in the bidirectional communication system, vehicle information can be confirmed and operated from outside the vehicle, and security can be improved.

  The bidirectional communication system according to claim 2, wherein the first portable device and the second portable device have a short-range wireless communication function, and the first portable device and the second portable device are bidirectional. Communication is performed using the short-range wireless communication function.

  In the bidirectional communication system having such a configuration, bidirectional communication between the first portable device and the second portable device is performed using a short-range wireless communication function. In short-range wireless communication, weak electromagnetic wave signals are used. For this reason, it is possible to limit the distance that a signal reaches when the first portable device and the second portable device perform bidirectional communication, and to reduce the possibility that information such as encryption information leaks to an external communication device. As a result, the security of the bidirectional communication system can be further increased.

  In the bidirectional communication system of the present invention, the second portable device has encryption storage means for storing encryption information. And the 1st portable machine acquires encryption information from encryption storage means by bidirectional communication with the 2nd portable machine, and performs bidirectional communication with onboard equipment using the acquired encryption information. Therefore, the 1st portable machine can acquire vehicle information from onboard equipment, and can transmit a signal about vehicle operation to onboard equipment using bidirectional communications with onboard equipment. When the on-vehicle device and the first portable device perform two-way communication, the vehicle information leaks to the outside by performing two-way communication with the on-vehicle device using encryption information. It is possible to prevent the vehicle from being erroneously operated in response to the signal. Moreover, the first portable device obtains encryption information from the encryption storage means on the condition that mutual authentication with the second portable device is established. Therefore, when the first portable device is used for purposes other than bidirectional communication with the vehicle-mounted device, it is possible to prevent the encryption information from leaking to the outside by mistake. It is also possible to prevent vehicle information from being confirmed and operated by a third person who does not have the second portable device. As a result, in the bidirectional communication system, vehicle information can be confirmed and operated from outside the vehicle, and security can be improved.

  Therefore, according to the present invention, it is possible to provide a bidirectional communication system that can perform vehicle information confirmation and vehicle operation from the outside of the vehicle and can enhance security.

It is a block diagram which shows the structure of the bidirectional | two-way communication system 1 which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the usage example of the bidirectional | two-way communication system 1 which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the onboard equipment 10 shown in FIG. It is a block diagram which shows the structure of the 1st portable device 20 shown in FIG. It is a schematic diagram which shows the structure of the 1st portable device 20 shown in FIG. It is a block diagram which shows the structure of the 2nd portable device 30 shown in FIG. It is a schematic diagram which shows the structure of the 2nd portable device 30 shown in FIG. It is a flowchart which shows the procedure of the confirmation of the vehicle information which concerns on embodiment of this invention. It is a flowchart which shows the procedure of the vehicle operation which concerns on embodiment of this invention. It is a schematic diagram which shows the structure of the 2nd portable device 130 which concerns on 2nd Embodiment of this invention. It is explanatory drawing which shows the structure of the motor vehicle antitheft device which concerns on patent document 1.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In each drawing, the description will be made with the X1 direction as the left direction, the X2 direction as the right direction, the Y1 direction as the front, the Y2 direction as the rear, the Z1 direction as the upper side, and the Z2 direction as the lower side.

  First, the structure of the bidirectional | two-way communication system 1 which concerns on 1st Embodiment of this invention is demonstrated using FIG.1 and FIG.2. FIG. 1 is a configuration diagram showing a configuration of a bidirectional communication system 1 according to the first embodiment of the present invention. FIG. 2 is an explanatory diagram showing a usage example of the bidirectional communication system 1 according to the first embodiment of the present invention.

  As shown in FIG. 1, the bidirectional communication system 1 includes an in-vehicle device 10, a first portable device 20, and a second portable device 30. The second portable device 30 has encryption storage means 34.

  As shown in FIG. 2, the vehicle-mounted device 10 is mounted on a vehicle 40. The vehicle 40 includes a door 41 that can be locked and unlocked, and various in-vehicle devices 42. The first portable device 20 and the second portable device 30 are carried by the user 50.

  The first portable device 20 and the second portable device 30 can perform bidirectional communication. The first portable device 20 and the second portable device 30 can perform mutual authentication, and perform mutual authentication when the in-vehicle device 10 and the first portable device 20 perform two-way communication.

  The in-vehicle device 10 and the first portable device 20 can perform bidirectional communication. The on-vehicle device 10 and the first portable device 20 can be mutually authenticated, and mutual authentication is performed when the on-vehicle device 10 and the first portable device 20 perform bidirectional communication.

  Moreover, the onboard equipment 10 and the 1st portable device 20 are transmitting / receiving the signal regarding vehicle information or vehicle operation by two-way communication. When transmitting and receiving signals relating to vehicle information and vehicle operation, the vehicle-mounted device 10 and the first portable device 20 perform two-way communication using encryption information in order to increase security. Encryption information used for bidirectional communication between the vehicle-mounted device 10 and the first portable device 20 is stored in the encryption storage unit 34 of the second portable device 30. The first portable device 20 obtains encryption information from the encryption storage means 34 on the condition that mutual authentication with the second portable device 30 is established.

  Next, the configuration of the vehicle-mounted device 10 will be described with reference to FIG. FIG. 3 is an explanatory diagram showing the configuration of the vehicle-mounted device 10 shown in FIG.

  As shown in FIG. 3, the vehicle-mounted device 10 includes first control means 11, first communication means 12, first authentication means 13, and encryption determination means 14.

  The first control unit 11 controls the first communication unit 12, the first authentication unit 13, and the encryption determination unit 14. The first control means 11 is connected to various vehicle-mounted devices 42, obtains vehicle information from the vehicle-mounted device 42, and instructs the vehicle-mounted device 42 to perform vehicle operations.

  The in-vehicle device 42 includes a door locking device 42 a that locks and unlocks the door 41, a vehicle information management device 42 b that manages various vehicle information related to the vehicle 40, and the like. The vehicle information managed by the vehicle information management device 42b includes information on the locked state of the door 41, information on the operating state of the engine, information on the open / closed state of the window, information on the lighting state of the lighting, and temperature in the vehicle. Information, information on the remaining amount of fuel, information on tire air pressure, and the like are included.

  The first communication unit 12 performs bidirectional communication with the first portable device 20. The first authentication means 13 performs mutual authentication with the first portable device 20 when the vehicle-mounted device 10 and the first portable device 20 perform two-way communication.

  The encryption determination unit 14 performs determination regarding encryption information. In the present embodiment, when the vehicle-mounted device 10 receives encryption information, the encryption determination unit 14 determines whether the received encryption information matches information registered in advance.

  Next, the configuration of the first portable device 20 will be described with reference to FIGS. 4 and 5. FIG. 4 is a configuration diagram showing the configuration of the first portable device 20 shown in FIG. FIG. 5 is a schematic diagram showing the structure of the first portable device 20 shown in FIG. FIG. 5A is a top view and FIG. 5B is a side view.

  The first portable device 20 is a portable information terminal called a smartphone. As shown in FIG. 4, the first portable device 20 includes a second control unit 21, a second communication unit 22, a second authentication unit 23, a third communication unit 24, a third authentication unit 25, a display unit 26, and an input unit. 27, a charging means 28, and a first battery 29. As shown in FIG. 5, the first portable device 20 has a substantially rectangular parallelepiped plate-like outer shape, and a display screen 26 a of the display means 26 is disposed on the upper portion of the first portable device 20. .

  The second control unit 21 controls the second communication unit 22, the second authentication unit 23, the third communication unit 24, the third authentication unit 25, the display unit 26, the input unit 27, and the charging unit 28.

  The second communication means 22 performs bidirectional communication with the vehicle-mounted device 10. The second authentication means 23 performs mutual authentication with the vehicle-mounted device 10 when the vehicle-mounted device 10 and the first portable device 20 perform two-way communication. The third communication unit 24 performs bidirectional communication with the second portable device 30. The third authentication unit 25 performs mutual authentication with the second portable device 30 when the first portable device 20 and the second portable device 30 perform two-way communication.

  The display means 26 displays various information including vehicle information on the display screen 26a. As the display means 26, a display device such as a liquid crystal display panel is used. The input unit 27 detects various input operations on the first portable device 20. As the input means 27, an input device such as a capacitive touch panel is used. The input operation includes an input operation for confirming vehicle information and an input operation for performing vehicle operation.

  The first battery 29 supplies power to the second control means 21, the second communication means 22, the second authentication means 23, the third communication means 24, the third authentication means 25, the display means 26, and the input means 27. Yes. As the first battery 29, a rechargeable battery is used. The charging unit 28 obtains electric power from an external power supply device (not shown) and charges the first battery 29.

  Next, the configuration of the second portable device 30 will be described with reference to FIGS. 6 and 7. FIG. 6 is a configuration diagram illustrating the configuration of the second portable device 30 illustrated in FIG. 1. FIG. 7 is a schematic diagram showing the structure of the second portable device 30 shown in FIG. FIG. 7A is a top view, and FIG. 7B is a side view.

  As shown in FIG. 6, the second portable device 30 includes a third control unit 31, a fourth communication unit 32, a fourth authentication unit 33, an encryption storage unit 34, a second battery 35, and a first operation button 36. doing. Further, as shown in FIG. 7, the second portable device 30 has an outer shape like a small rectangular parallelepiped box, and the first operation button 36 can be pressed on the upper portion of the second portable device 30. It is arranged.

  The third control unit 31 controls the fourth communication unit 32, the fourth authentication unit 33, and the encryption storage unit 34, and monitors the first operation button 36.

  The fourth communication unit 32 performs bidirectional communication with the first portable device 20. The fourth authentication means 33 performs mutual authentication with the first portable device 20 when the first portable device 20 and the second portable device 30 perform two-way communication.

  As described above, the encryption storage unit 34 stores encryption information used for bidirectional communication between the vehicle-mounted device 10 and the first portable device 20. In the present embodiment, the encryption information is information called key information for encrypting a signal used for bidirectional communication between the vehicle-mounted device 10 and the first portable device 20. A storage device such as a ROM is used as the encryption storage unit 34.

  The second battery 35 supplies power to the third control unit 31, the fourth communication unit 32, the fourth authentication unit 33, and the encryption storage unit 34. A small dry battery is used as the second battery 35. The first operation button 36 is an operation button for causing the first portable device 20 and the second portable device 30 to perform mutual authentication.

  Next, bidirectional communication between the first portable device 20 and the second portable device 30 will be described. The bidirectional communication between the first portable device 20 and the second portable device 30 is performed by the third communication means 24 of the first portable device 20 and the fourth communication means 32 of the second portable device 30 as described above. . For bidirectional communication between the first portable device 20 and the second portable device 30, a communication device for near field communication standards called Bluetooth (registered trademark) is used. The electromagnetic wave signal for short-range wireless communication is a weak electromagnetic wave signal, and the distance that the signal reaches is limited to about several meters.

  When the first portable device 20 and the second portable device 30 perform two-way communication, mutual authentication is performed between the first portable device 20 and the second portable device 30. In the mutual authentication between the first portable device 20 and the second portable device 30, the fourth authentication means 33 transmits the ID information for authentication to the third authentication means 25 using bidirectional communication, and the transmitted ID information is This is performed by the third authentication unit 25 collating, and the third authentication unit 25 transmitting the collation result to the fourth authentication unit 33 using bidirectional communication.

  The signal transmitted from the first portable device 20 to the second portable device 30 using the bidirectional communication includes a request signal for requesting encryption information. The signal transmitted from the second portable device 30 to the first portable device 20 using the bidirectional communication includes the encryption information stored in the encryption storage unit 34.

  Next, bidirectional communication between the vehicle-mounted device 10 and the first portable device 20 will be described. Bidirectional communication between the vehicle-mounted device 10 and the first portable device 20 is performed by the first communication means 12 of the vehicle-mounted device 10 and the second communication means 22 of the first portable device 20 as described above. For bidirectional communication between the in-vehicle device 10 and the first portable device 20, a communication device for near field communication standard called Bluetooth is used. The electromagnetic wave signal for short-range wireless communication is a weak electromagnetic wave signal, and the distance that the signal reaches is limited to about several meters.

  When the vehicle-mounted device 10 and the first portable device 20 perform two-way communication, mutual authentication is performed between the vehicle-mounted device 10 and the first portable device 20. In the mutual authentication between the vehicle-mounted device 10 and the first portable device 20, the second authentication unit 23 transmits the ID information for authentication to the first authentication unit 13 using the two-way communication, and the transmitted ID information is the first. The authentication is performed by the authentication unit 13 and the first authentication unit 13 transmits the verification result to the second authentication unit 23 using two-way communication.

  The signal transmitted from the first portable device 20 to the vehicle-mounted device 10 using bidirectional communication includes a request signal for requesting transmission of vehicle information. Moreover, the request signal which requests | requires vehicle operation is contained in the signal transmitted to the onboard equipment 10 from the 1st portable device 20 using bidirectional | two-way communication. The vehicle operation requested by the request signal includes an operation of locking or unlocking the door 41 of the vehicle 40, an operation of starting or stopping the engine of the vehicle 40, an operation of opening or closing the window of the vehicle 40, or illumination of the vehicle 40. These are operations such as an operation of turning on or off, and an operation of operating or stopping an apparatus such as an air conditioner mounted on the vehicle 40.

  The signal transmitted from the vehicle-mounted device 10 to the first portable device 20 using the bidirectional communication includes vehicle information obtained from the vehicle information management device 42b. The vehicle information obtained from the vehicle information management device 42b includes information on the locked state of the door 41, information on the operating state of the engine, information on the open / closed state of the window, information on the lighting state of the lighting, and information on the temperature inside the vehicle. And information on the remaining amount of fuel, information on tire air pressure, and the like.

  Next, a vehicle information confirmation method performed using the bidirectional communication system 1 will be described with reference to FIG. FIG. 8 is a flowchart showing a procedure for checking vehicle information according to the embodiment of the present invention.

  As shown in FIG. 8, first, the first portable device 20 and the second portable device 30 perform mutual authentication (step Sa1). Mutual authentication between the first portable device 20 and the second portable device 30 is performed when the user 50 carries the first portable device 20 and the second portable device 30 and presses the first operation button 36 of the second portable device 30. The operation is performed in conjunction with the pressing operation.

  Next, the vehicle-mounted device 10 and the first portable device 20 perform mutual authentication (step Sa2). The mutual authentication between the in-vehicle device 10 and the first portable device 20 is performed by the user 50 after the mutual authentication between the first portable device 20 and the second portable device 30 is established. Is carried out automatically between the vehicle-mounted device 10 and the first portable device 20 when the vehicle is within a range where bidirectional communication between the vehicle-mounted device 10 and the first portable device 20 is possible. Yes.

  As a result, the first portable device 20 and the second portable device 30 are capable of bidirectional communication, and the in-vehicle device 10 and the first portable device 20 are capable of bidirectional communication. The device 20 and the second portable device 30 wait (step Sa3).

  Next, in the first portable device 20, the input unit 27 detects an input operation related to confirmation of vehicle information (step Sa4). And the 1st portable machine 20 acquires encryption information from the 2nd portable machine 30 (Step Sa5). The first portable device 20 transmits a request signal for requesting encrypted information to the second portable device 30 after mutual authentication between the first portable device 20 and the second portable device 30 is established. Corresponding to the signal, the encryption information stored in the encryption storage means 34 is transmitted by the second portable device 30 to the first portable device 20.

  Next, the 2nd communication means 22 encrypts the request signal corresponding to input operation using the encryption information acquired from the 2nd portable device 30, and transmits to the onboard equipment 10 with encryption information (step Sa6). The signal encrypted using the encryption information obtained from the second portable device 30 is set in advance so that the encryption can be released on the vehicle-mounted device 10 side.

  Next, in the vehicle-mounted device 10, the first communication unit 12 receives the request signal and the encryption information (step Sa7). And the encryption determination means 14 determines based on the received encryption information (step Sa8). The determination is whether or not the received cryptographic information matches information registered in advance. And the 1st control means 11 judges the propriety of transmission of vehicle information based on the judgment result of encryption judgment means 14 (Step Sa9).

  In step Sa9, when the received encryption information does not match the information registered in advance, and the first control means 11 determines that the transmission of the vehicle information is “impossible”, the vehicle information is not transmitted. And it returns to step Sa4 and the onboard equipment 10, the 1st portable device 20, and the 2nd portable device 30 wait again.

  In step Sa9, if the received encryption information matches the pre-registered information and the first control means 11 determines that transmission of the vehicle information is “permitted”, the first communication means 12 releases the encryption of the request signal. And the 1st control means 11 acquires the vehicle information corresponding to a request signal from the vehicle information management apparatus 42b (step Sa10). And the 1st communication means 12 encrypts the acquired vehicle information, and transmits to the 1st portable device 20 (step Sa11). The signal transmitted from the vehicle-mounted device 10 to the first portable device 20 is set in advance so that the encryption can be released using the encryption information obtained from the second portable device 30.

  Next, in the 1st portable machine 20, the 2nd communication means 22 receives vehicle information from the onboard equipment 10, and cancels encryption (step Sa12). Then, the vehicle information received by the display means 26 is displayed on the display screen 26a (step Sa13). And the information regarding the locked state of the door 41 is displayed, for example. Then, it returns to step Sa4 and the onboard equipment 10, the 1st portable device 20, and the 2nd portable device 30 wait again.

  The user 50 can confirm vehicle information from the outside of the vehicle 40 according to such a procedure, for example.

  Next, a vehicle operation method performed using the bidirectional communication system 1 will be described with reference to FIG. FIG. 9 is a flowchart showing a procedure of vehicle operation according to the embodiment of the present invention.

  As shown in FIG. 9, first, the first portable device 20 and the second portable device 30 perform mutual authentication (step Sb1). Next, the vehicle-mounted device 10 and the first portable device 20 perform mutual authentication (step Sb2). Next, the in-vehicle device 10 and the first portable device 20 are capable of bidirectional communication between the first portable device 20 and the second portable device 30 and the in-vehicle device 10 and the first portable device 20 are capable of bidirectional communication. The device 20 and the second portable device 30 wait (Step Sb3). The method in which the first portable device 20 and the second portable device 30 perform mutual authentication is the same as the method described in the procedure for checking vehicle information. The method in which the vehicle-mounted device 10 and the first portable device 20 perform mutual authentication is the same as the method described in the procedure for checking vehicle information.

  Next, in the first portable device 20, the input unit 27 detects an input operation related to the vehicle operation (step Sb4). And the 1st portable machine 20 acquires encryption information from the 2nd portable machine 30 (Step Sb5). The method for obtaining the encryption information is the same as the method described in the procedure for checking the vehicle information. And the 2nd communication means 22 encrypts the request signal corresponding to input operation using the encryption information acquired from the 2nd portable device 30, and transmits to the onboard equipment 10 with encryption information (step Sb6).

  Next, in the vehicle-mounted device 10, the first communication unit 12 receives the request signal together with the encryption information (step Sb7). And the encryption determination means 14 determines based on the received encryption information (step Sb8). The determination is whether or not the received cryptographic information matches information registered in advance. And the 1st control means 11 judges the propriety of transmission of vehicle information based on the judgment result of encryption judgment means 14 (Step Sb9).

  In step Sb9, when the received encrypted information does not match the pre-registered information and the first control unit 11 determines that the vehicle operation is “impossible”, the vehicle operation is not performed. And it returns to step Sb4 and the onboard equipment 10, the 1st portable device 20, and the 2nd portable device 30 wait again.

  In step Sb9, when the received encrypted information matches the information registered in advance and the first control means 11 determines that the vehicle operation is “permitted”, the first communication means 12 releases the encryption of the request signal, The 1st control means 11 issues the instruction | indication of the vehicle operation corresponding to a request signal to the vehicle equipment 42 (step Sb10). For example, the door 41 is locked.

  Then, it returns to step Sb4 and the onboard equipment 10, the 1st portable device 20, and the 2nd portable device 30 wait again. The user 50 can perform vehicle operations from outside the vehicle 40 in this way.

  Next, the effect of this embodiment will be described. In the bidirectional communication system 1 of the present embodiment, the second portable device 30 has a cryptographic storage unit 34 that stores cryptographic information. And the 1st portable machine 20 acquires encryption information from the encryption memory | storage means 34 by bidirectional | two-way communication with the 2nd portable machine 30, and is performing bidirectional | two-way communication with the onboard equipment 10 using the acquired encryption information. . Therefore, the first portable device 20 can obtain vehicle information from the vehicle-mounted device or transmit a request signal related to vehicle operation to the vehicle-mounted device 10 using bidirectional communication with the vehicle-mounted device 10. And when onboard equipment 10 and the 1st portable machine 20 perform bidirectional communication, vehicle information leaks to external communication equipment by performing bidirectional communications with onboard equipment 10 using encryption information, It is possible to prevent the vehicle from being erroneously operated in response to a signal from an external communication device.

  In addition, when the 1st portable device 20 is a portable information terminal called a smart phone, it is assumed that the 1st portable device 20 is used for various uses other than the bidirectional | two-way communication with the onboard equipment 10. FIG. Therefore, if the time for which the first portable device 20 holds the encryption information is not limited, when the first portable device 20 is used for purposes other than bidirectional communication with the vehicle-mounted device 10, the encryption information is mistakenly exposed to the outside. There is a possibility of leakage. However, the first portable device 20 obtains encryption information from the encryption storage means 34 on the condition that mutual authentication with the second portable device 30 is established. Therefore, the time for which the first portable device 20 holds the encryption information can be limited to a case where mutual authentication with the second portable device 30 is established. For example, when the first portable device 20 is used for a purpose other than bidirectional communication with the vehicle-mounted device 10, it is possible to prevent the encryption information from being leaked to the outside by mistake. Further, for example, even when the first portable device 20 is accidentally lost, it is possible to prevent vehicle information from being confirmed or operated by a third party who does not have the second portable device 30.

  As a result, in the bidirectional communication system 1, vehicle information can be confirmed and a vehicle operation can be performed from outside the vehicle 40, and security can be improved.

  Further, in the interactive communication system 1 of the present embodiment, vehicle information transmission and vehicle operation using bidirectional communication between the first portable device 20 and the second portable device 30 are not performed. Therefore, the two-way communication between the first portable device 20 and the second portable device 30 does not require strict security like the two-way communication between the vehicle-mounted device 10 and the first portable device 20, but reaches a long distance. When communication is performed using an electromagnetic wave signal, the range in which the electromagnetic wave signal can be received is expanded, and when the first portable device 20 and the second portable device 30 perform two-way communication, the second portable device 30 There is a slight possibility that information such as encryption information transmitted to the first portable device 20 leaks to an external communication device.

  However, as described above, the first portable device 20 and the second portable device 30 have a short-range wireless communication function, and the two-way communication between the first portable device 20 and the second portable device 30 is a short-range wireless communication. It is done using the function. In short-range wireless communication, weak electromagnetic wave signals are used. For this reason, it is possible to limit a distance that a signal reaches when the first portable device 20 and the second portable device 30 perform bidirectional communication, and to reduce the possibility that information such as encryption information leaks to an external communication device. . As a result, the bidirectional communication system 1 can further enhance security during communication.

  In the bidirectional communication system 1 of the present embodiment, bidirectional communication between the first portable device 20 and the second portable device 30 is performed using a weak electromagnetic wave signal for short-range wireless communication. Therefore, power consumption for bidirectional communication between the first portable device 20 and the second portable device 30 can be reduced. Further, in the interactive communication system 1 of the present embodiment, the mutual authentication between the first portable device 20 and the second portable device 30 is linked with the pressing operation for pressing the first operation button 36 of the second portable device 30. Yes. Therefore, the first operation button 36 is pressed to perform mutual authentication between the first portable device 20 and the second portable device 30 and bidirectional communication between the first portable device 20 and the second portable device 30. It can be limited to cases. As a result, the battery life of the second battery 35 of the second portable device 30 can be further extended.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, in this embodiment, when it is the same structure as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. In each figure, the description will be made with the X1 direction as the left direction, the X2 direction as the right direction, the Y1 direction as the front, the Y2 direction as the rear, the Z1 direction as the upper side, and the Z2 direction as the lower side.

  First, the configuration of the second portable device 130 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 10 is a schematic diagram illustrating a structure of the second portable device 130 according to the second embodiment of the present invention.

  In the second embodiment, the second portable device 30 of the first embodiment is replaced with a second portable device 130 shown in FIG. The second portable device 130 is obtained by adding the function of the electronic key used in the keyless entry system to the function of the second portable device 30 described above. In the keyless entry system, for example, an ultra-high frequency band electromagnetic signal called UHF is transmitted from the second portable device 130 to an in-vehicle receiver (not shown), and the door 41 of the vehicle 40 is locked or unlocked.

  As shown in FIG. 10, the second portable device 130 includes a second operation button 37 and a third operation button 38 in addition to the first operation button 36. As shown in FIG. 10, the first operation button 36, the second operation button 37, and the third operation button 38 are disposed so as to be pressed at predetermined positions on the upper portion of the second portable device 130.

  The second operation button 37 is an operation button for locking the door 41 of the vehicle 40. When the second operation button 37 of the second portable device 130 is pressed, the second portable device 130 transmits a door lock signal for locking the door 41 of the vehicle 40 to the in-vehicle receiver, and the door of the vehicle 40 41 is locked. The third operation button 38 is an operation button for unlocking the door 41 of the vehicle 40. When the second operation button 37 of the second portable device 130 is pressed, the second portable device 130 transmits an unlock signal for unlocking the door 41 of the vehicle 40 to the in-vehicle receiver, and the vehicle 40 The door 41 is unlocked.

  Thus, the second portable device 130 has a function of an electronic key used in the keyless entry system. When the user 50 does not carry the first portable device 20, the door 41 of the vehicle 40 is locked using the second operation button 37 of the second portable device 30, or the second portable device 30 The door 41 of the vehicle 40 can be unlocked using the third operation button 38.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to said embodiment, It can change suitably, unless it deviates from the objective range of this invention.

  For example, in the embodiment of the present invention, a communication device other than the near field communication standard called Bluetooth may be used for bidirectional communication between the vehicle-mounted device 10 and the first portable device 20. The bidirectional communication between the vehicle-mounted device 10 and the first portable device 20 may be communication using a signal other than an electromagnetic wave signal such as infrared rays.

  In the embodiment of the present invention, the vehicle-mounted device 10 and the first portable device 20 perform mutual authentication when performing bidirectional communication, and perform bidirectional communication using the encryption information stored in the encryption storage unit 34. However, if sufficient security can be ensured only by performing bidirectional communication using the encryption information stored in the encryption storage unit 34, the vehicle-mounted device 10 and the first portable device 20 perform bidirectional communication. Mutual authentication may not be performed when performing.

  In the embodiment of the present invention, short-distance called Bluetooth is used for bidirectional communication between the first portable device 20 and the second portable device 30 and bidirectional communication between the first portable device 20 and the second portable device 130. A communication device other than the wireless communication standard may be used. For example, a communication standard that has developed a conventional short-range wireless communication standard and requires less power for communication has recently been put into practical use. By using a communication device created according to such a communication standard, the battery life of the second battery 35 used in the second portable device 30 and the second portable device 130 can be further extended. In addition, bidirectional communication between the first portable device 20 and the second portable device 30 and bidirectional communication between the first portable device 20 and the second portable device 130 are communication using signals other than electromagnetic wave signals such as infrared rays. It does not matter.

  In the embodiment of the present invention, the encryption information stored in the second portable device 30 and the second portable device 130 may be information that changes with time based on pre-registered information. By using such encryption information, security during communication can be further enhanced.

DESCRIPTION OF SYMBOLS 1 Two-way communication system 10 Onboard equipment 11 1st control means 12 1st communication means 13 1st authentication means 14 Encryption determination means 20 1st portable device 21 2nd control means 22 2nd communication means 23 2nd authentication means 24 3rd Communication means 25 Third authentication means 26 Display means 26a Display screen 27 Input means 28 Charging means 29 First battery 30 Second portable device 31 Third control means 32 Fourth communication means 33 Fourth authentication means 34 Encryption storage means 35 Second Battery 36 First operation button 37 Second operation button 38 Third operation button 40 Vehicle 41 Door 42 In-vehicle device 42a Door locking device 42b Vehicle information management device 50 User 130 Second portable device

Claims (2)

A vehicle-mounted device mounted on the vehicle;
A first portable device capable of bidirectional communication with the vehicle-mounted device;
A second portable device capable of bidirectional communication with the first portable device;
With
The second portable device is:
Having cryptographic storage means for storing cryptographic information;
The first portable device is:
Perform mutual authentication with the second portable device by bidirectional communication with the second portable device,
On the condition that mutual authentication with the second portable device is established,
Obtaining the cryptographic information from the cryptographic storage means by bidirectional communication with the second portable device;
A bi-directional communication system, wherein bi-directional communication with the vehicle-mounted device is performed using the obtained cryptographic information. The first portable device and the second portable device have a short-range wireless communication function,
Two-way communication between the first portable device and the second portable device is performed using the short-range wireless communication function,
The bidirectional communication system according to claim 1.

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