KR101580568B1 - Vehicle of diagnosis communication apparatus and method - Google Patents

Vehicle of diagnosis communication apparatus and method Download PDF

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Publication number
KR101580568B1
KR101580568B1 KR1020140157021A KR20140157021A KR101580568B1 KR 101580568 B1 KR101580568 B1 KR 101580568B1 KR 1020140157021 A KR1020140157021 A KR 1020140157021A KR 20140157021 A KR20140157021 A KR 20140157021A KR 101580568 B1 KR101580568 B1 KR 101580568B1
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KR
South Korea
Prior art keywords
external device
authentication
communication
diagnostic
communication channel
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KR1020140157021A
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Korean (ko)
Inventor
이정훈
김수미
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주식회사 유라코퍼레이션
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/06—Generation of reports

Abstract

The present invention relates to an automobile diagnosis communications apparatus and method and, particularly, to an automobile diagnosis communications apparatus and method which directly couples a diagnosis communications bus to an internal bus after security authentication is completed to maintain security and to enhance communications speed. To this end, the present invention provides the automobile diagnosis communication apparatus connected to an external device to perform diagnosis, which comprises: a control unit, when connected to the external device, checks information on a diagnosis communication controller needing an access from the external device which has performed the security authentication to be successful in the security authentication and outputting a direct bus coupling circuit control signal according to the check result; a gateway composed of a direct bus coupling circuit unit forming an automobile communication channel between the external device and the diagnosis communication controller such that the communication channel is physically coupled according to the direct bus coupling circuit control signal; and the diagnosis communication controller performing a direct routing operation with the external device by the direct bus coupling circuit unit.

Description

[0001] VEHICLE OF DIAGNOSIS COMMUNICATION APPARATUS AND METHOD [

The present invention relates to a diagnostic communication apparatus and method for a vehicle, and more particularly, to a diagnostic communication apparatus and method for a vehicle, which enables a diagnostic communication bus to be directly connected to an internal bus to maintain security and improve communication speed.

In general, a message gateway is used for message and signal transmission between different communication networks. In the gateway, signal routing, which is a method of disassembling and re-transmitting the current communication message, and message routing method, .

In the conventional diagnostic communication apparatus for a vehicle, in the case of a message or signal routing in a network using a gateway, a function of transferring input contents to a necessary network without performing an authentication process for security check or content confirmation at a gateway . Such a conventional vehicle diagnostic communication apparatus will be described with reference to the accompanying drawings.

1 is a configuration diagram of a conventional diagnostic communication apparatus for a vehicle.

1 (A) and 1 (B), FIG. 1 (A) shows a case where normal routing can be performed at the time of connecting a diagnostic device to which access permission is granted, and FIG. 1 And normal routing is not possible when the equipment is connected. In FIG. 1, (A) and (B), reference numeral 30 denotes a diagnostic communication controller.

1 (A) shows a case in which the gateway 20 is connected to the engine controller 30b via the routing software (SW) 21 stored in the memory, .

Next, Fig. 1 (B) shows that, when the CAN monitoring equipment 12 is connected to the vehicle with development equipment whose access permission is unauthorized, since the gateway 20 is equipment other than the authorized diagnostic unit 11, .

As a result, there is no communication network between the unauthorized CAN monitoring device 12 and the engine controller 30b, which may cause security problems.

Even if the gateway 20 transmits a message in order to enhance the security of the conventional techniques described above, a delay occurs in the gateway 20 during diagnosis and reprogramming, and message transmission at a high speed is impossible . The reprogramming procedure of connecting the controller 11 of the diagnosis unit 11 and the controller of the gateway 20 to perform diagnostic function driving and reprogramming functions is as follows. (Original Equipment Manufacturing) specifications.

Therefore, unless all the information related to the diagnosis is stored in the routing table in advance, the message having the new ID value or the data information of the development temporary CAN ID for development can not be transmitted through the gateway.

Further, in the conventional diagnostic communication apparatus for a vehicle, it is difficult to confirm whether the content to be rewritten is correct or not, and the security is poor when the encryption key is not used.

In order to enhance the security, the gateway makes it impossible to access the internal network immediately, and there is a primary security effect, but the communication speed is relatively lower than the conventional one.

In addition, diagnostic communication messages are routed in the same way, but development information that is not in the routing database can not be transmitted, and there is a problem that diagnosis delay due to routing occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a diagnostic communication apparatus and method for a vehicle that can directly connect a diagnostic communication bus to an internal bus, It has its purpose.

Another object of the present invention is to implement a direct coupling circuit which can directly connect diagnostic units or development equipment with units in a vehicle and to perform authentication of a diagnostic or development device when a diagnostic or development device is connected, The present invention provides a diagnostic communication apparatus and method for a vehicle that can directly communicate with units in a vehicle through a direct connection circuit.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to another aspect of the present invention, there is provided a diagnostic communication device for a vehicle, the diagnostic communication device being connected to an external device and performing a diagnosis, A control unit for confirming information of a diagnostic communication controller requiring access from the device and outputting a bus direct connection circuit control signal in accordance with the confirmation result; A gateway direct connection circuit portion for forming a vehicle communication channel between the external device and the diagnostic communication controller so that the communication channel can be physically connected directly by the bus direct connection circuit control signal; And a diagnostic communication controller that performs direct routing with the external device by the bus direct circuit portion.

The bus direct connection circuit unit may include: a multiplexer unit including at least one multiplexer so that a communication channel can be physically connected directly by the bus direct connection circuit control signal; And a communication transceiver portion directly connected by the at least one multiplexer and comprising at least one or more communication transceivers directly connected to the diagnostic communication controller and a communication channel.

Also, the communication transceiver may be based on CAN communication.

It is preferable that the multiplexer receives the bus direct connection circuit control signal from one of the four channels so that at least one of the three communication transceivers can be directly connected to the communication channel.

Also, the gateway can check the connection status of the external device that has succeeded in authentication, and can immediately disconnect the network when the connection is lost.

In addition, the gateway preferably prevents other messages from being activated during the reprogramming.

The control unit may include: a security authentication interface unit connected to the external device; And a security authentication unit for transmitting an arbitrary number generated on the side of the external device, receiving the encrypted key encryption using the random number, decrypting the received key encryption, and performing security authentication to determine whether to perform access authentication .

According to another aspect of the present invention, there is provided a diagnostic communication method for a vehicle that is connected to an external device and performs diagnosis, the method comprising: Confirming information of a diagnostic communication controller that requires access from an external device that succeeded in the authentication; And performing a direct routing with the external device by forming a vehicle communication channel between the external device and the diagnostic communication controller so that the communication channel is physically directly connected according to the result of the checking.

The step of verifying the information of the diagnostic communication controller may include the steps of: transmitting a random number to the external device and receiving the encrypted key encryption from the external device using the random number; And decrypting the received key encryption to perform security authentication to determine whether to perform access authentication.

The step of performing the direct routing may include directing at least one multiplexer and at least one multiplexer so that a communication channel can be physically connected directly by a bus direct connection circuit control signal, And forming a direct-connect network with at least one or more communication transceivers directly connected thereto.

In addition, the diagnostic communication method for a vehicle may further include confirming a connection state of an external device that has succeeded in authentication, and immediately disconnecting the network when the connection is lost.

Further, the diagnostic communication method for a vehicle may further include stopping the routing function at the time of accepting the authentication.

According to the above-mentioned problem solving means, the present invention can be implemented by a hardware implementation of a diagnostic circuit or a direct connection circuit capable of directly connecting development units and units in a vehicle, and when a diagnostic or development device is connected, By enabling the diagnostic or development equipment to communicate directly with in-vehicle units (eg, diagnostic communication controllers) through a direct connection circuit, the diagnostic communication bus can be directly connected to the internal bus to maintain security and improve communication speed. There is an effect that can be.

1 is a configuration diagram of a conventional diagnostic communication apparatus for a vehicle.
2 is a configuration diagram of a diagnostic communication apparatus for a vehicle according to an embodiment of the present invention;
3 is an internal configuration diagram of the gateway of Fig.
FIG. 4A is an exemplary diagram for explaining the operation of the multiplexer in FIG. 3; FIG.
FIG. 4B is an example of the control logic of the multiplexer in FIG. 3; FIG.
5 is a flowchart showing a communication method between an external device and a gateway according to an embodiment of the present invention.
6 is a flowchart illustrating a diagnostic communication method for a vehicle according to an embodiment of the present invention.

It should be understood that the specific details of the invention are set forth in the following description to provide a more thorough understanding of the present invention and that the present invention may be readily practiced without these specific details, It will be clear to those who have knowledge.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings, with reference to the parts necessary for understanding the operation and operation according to the present invention.

In the present invention, a direct connection circuit that directly connects a diagnostic unit and units in a vehicle (for example, a diagnostic communication controller) is implemented in the gateway, and authentication of the diagnostic unit is performed when the diagnostic unit is connected, So as to enable communication with units in the vehicle directly.

2 is a configuration diagram of a diagnostic communication apparatus for a vehicle according to an embodiment of the present invention.

2 (A) and 2 (B), FIG. 2 (A) shows a case in which internal access is possible after authentication at the time of connection of a diagnosis device to which access permission is granted, and FIG. 2 The internal access is possible after the authentication when the developed development equipment is connected.

2 (A), the gateway 60 performs security authentication through the authentication unit 61 when the diagnostic unit 51 to which the access permission has been granted is connected to the vehicle, And controls the bus direct connection circuit unit 63 so that the communication channel is physically directly connected to the communication controller 30. [ Thus, the bus direct connection circuit unit 63 can physically connect the communication network between the diagnostic unit 51 and the diagnostic communication controller 30, thereby improving the communication speed.

2 (B), when the CAN monitoring equipment 52 is connected to the vehicle with the development equipment whose access permission is unauthorized, the gateway 20, similarly to the above-described FIG. 2 (A) ), And controls the bus direct connection circuit unit 63 so that the communication channel can be physically directly connected between the CAN monitoring equipment 52 and the diagnostic communication controller 30, which have succeeded in authentication.

Accordingly, a communication network between the unauthorized CAN monitoring device 12 and the engine controller 30b is formed by the direct direct connection of the bus direct connection circuit portion 63. [

The gateway 20 checks the connection status of an external device (a diagnostic device or a CAN monitoring device) that has succeeded in authentication, and immediately disconnects the network when the connection is lost. Further, the gateway 20 controls the other messages not to be activated while the reprogramming is in progress.

The internal configuration of the diagnostic communication apparatus for a vehicle according to the present invention will be described in detail as follows.

3 is an internal configuration diagram of the gateway of FIG.

3, the gateway 60 includes a control unit 60a, a bus serial circuit unit 63, and the like.

The control unit 60a confirms the information of the diagnostic communication controller 30 requiring the access from the diagnostic unit 51 that has performed the security authentication and succeeded in authentication when the external device such as the diagnostic unit 51 is connected, And outputs the bus direct connection circuit control signal to the bus direct connection circuit portion 63. [ 3, the control unit 60a includes first to third multiplexer controllers 62a to 62c, which are software configured to control the network paths by controlling the first to third multiplexers 65a to 65c at the next stage, May be provided. Here, the functions of the first to third multiplexer controllers 62a to 62c may be performed by the controller 60a. Then, the first to third multiplexer controllers 62a to 62c may not be essential components.

The control unit 60a includes a security authentication interface unit 61a connected to the diagnostic unit 51 and a random number generated at the diagnostic unit to receive encrypted key encryption using a random number and to decrypt the received key encryption And a security authentication unit 61b for performing security authentication and determining access authentication. Here, the security authentication interface unit 61a and the security authentication unit 61b are provided inside the authentication unit 61. [

The bus direct connection circuit unit 63 forms a communication channel for the vehicle between the diagnostic unit 51 and the diagnostic communication controller 30 so that the communication channel can be physically connected directly by the bus direct connection circuit control signal. Then, the diagnostic unit 51 and the diagnostic communication controller 30 perform direct routing by the bus direct circuit unit 63. [

The bus direct circuit unit 63 includes a multiplexer unit 65 composed of first to third multiplexers 65a to 65c so that a communication channel can be physically connected directly by a bus direct connection circuit control signal, And a communication transceiver unit 67 directly connected to the diagnosis communication controller 30 and the first to fourth communication transceivers 67a to 67d to which a communication channel is directly connected. Here, the first to fourth communication transceivers 67a to 67d are based on CAN communication.

The operations and actions of the first to third multiplexers 65a to 65c will be described with reference to the accompanying drawings.

FIG. 4A is an exemplary diagram for explaining the operation of the multiplexer in FIG. 3, and FIG. 4B is an exemplary diagram showing the control logic of the multiplexer in FIG. Here, the operation of the present invention will be described through the first and second multiplexers 65a and 65b and the first and second communication transceivers 67a and 67b in order to facilitate understanding of the present invention.

4A and 4B, the first multiplexer 65a receives a bus direct connection circuit control signal from one of the four channels, and the second one of the three channels is connected to the first and second communication transceivers 67a, and 67b, respectively, so that the second multiplexer 65b can be directly connected to the remaining one channel.

The first multiplexer 65a receives the bus direct connection circuit control signal through the A channel among the four channels A, B, C, and D, and accordingly outputs the B, C, and D As shown in FIG. 4B.

That is, if the A channel input of the first multiplexer 65a is '0', since the bus direct connection circuit control signal is not inputted, the first multiplexer 65a can not configure a communication channel for each of the B, C, and D channels . However, there is a case where the A channel input is '0', but the B, C, and D channel connections are '0' or '1'. As a result, when the A channel is '0', an invalid function is performed.

Accordingly, there are 16 cases depending on whether the first multiplexer 65a connects the A, B, C, and D channels. Accordingly, if the A channel is '1' and at least one of the B, C, and D channels is '1', the first multiplexer 65a can perform mutual communication through the channels connected by the first multiplexer 65a.

5 is a flowchart illustrating a communication method between an external device and a gateway according to an embodiment of the present invention.

Referring to FIG. 5, the external device 50 requests a diagnosis access to the gateway 60 (S501).

Then, the gateway 60 generates a random number by a diagnostic access request (S503), and transmits the generated random number to the external device 50 (S505).

The external device 50 receives the generated random number, encrypts the random number using the key (S507), and transmits it to the gateway 60 (S509).

The gateway 60 decrypts the encrypted key to perform access security authentication (S511).

That is, the authentication process for confirming whether the external device 50 to which access is permitted is performed while the gateway 60 decrypts the encryption key. Since the technique is already known in the art, a detailed description will be omitted.

Thereafter, when the gateway 60 notifies the external device 50 of the formal authentication (S513), the external device 50 completes the connection with the gateway 60 (S515).

The external device 50 requests a direct connection service for internal communication diagnosis (S517), the gateway 60 transmits a standby command for the related diagnostic communication controller 30 in accordance with the service request and prepares for necessary circuit interception (S519) .

Then, the gateway 60 requests the external device 50 to confirm the diagnosis communication controller necessary for the access (S521), and the external device 50 transmits the direct connection request diagnostic communication controller information to the gateway 60 (S523) .

The gateway 60 then blocks the necessary circuitry, transitions to the communication wait state, initiates monitoring for communication anomalies, and activates the function of the multiplexer for the requested channel (S525).

The gateway 60 transmits the access permission notification to the external device 50 (S527) after performing the step 525. The external device 50 performs communication and diagnosis (S529) To the gateway 60 side (S531), the gateway 60 normalizes the direct connection release function and the communication function (S533).

6 is a flowchart illustrating a diagnostic communication method for a vehicle according to an embodiment of the present invention.

Referring to FIG. 6, the gateway 60 receives a diagnostic access processing request from the external device 50 when the external device 50 is connected (S601).

Thereafter, the gateway 60 performs security authentication and determines whether the authentication is successful (S603).

If the authentication is unsuccessful as a result of the determination, the gateway 60 returns to step 601 within the retry range and repeats the security authentication process (S605). However, if the authentication retry exceeds the exceeding range, temporarily disconnecting the external device is performed (S607).

By setting the authentication retry limit, a denial of service (DoS) through authentication retry can be prevented.

However, if it is determined in step 603 that the authentication is successful, the gateway 60 accepts the security authentication and stops the routing function (S609).

That is, the gateway 60 performs pre-processing to prevent other messages from being activated in the internal network while the re-programming is in progress.

The gateway 60 verifies the information of the diagnostic communication controller 30 that requires access from the external device 50 so that the communication between the external device 50 and the diagnostic communication controller 30 So as to form a communication channel (S611).

The gateway 60 checks the connection state of the external device 50 and outputs a bus direct connection circuit control signal to disconnect the network immediately after it is determined that the connection state is abnormal (S613 to S615).

Thereafter, the gateway 60 advances the routing process so that the routing which has been stopped in step 609 can be continuously processed (S617).

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

11, 51: diagnosis unit 12, 52: CAN monitoring equipment
20, 60: gateway 30a: multimedia controller
30b: engine controller 30c: body controller
30d: Powertrain controller 50: External device
61: authentication unit 61a:
61b: Authentication processing unit 61c:
61d: Multiplexer control unit 63: Bus direct circuit unit
65: multiplexer units 65a to 65c: first to third multiplexers
67: Communication Transceiver Unit
67a to 67c: First to fourth communication transceivers

Claims (12)

A diagnostic communication apparatus for a vehicle, which is connected to an external device and performs diagnosis,
A control unit for confirming information of a diagnostic communication controller requiring access from an external device that performs security authentication when the external device is connected and outputting a bus direct connection circuit control signal according to a result of the authentication,
A gateway direct connection circuit portion for forming a vehicle communication channel between the external device and the diagnostic communication controller so that the communication channel can be physically connected directly by the bus direct connection circuit control signal; And
And a diagnostic communication controller that performs direct routing with the external device by the bus direct circuit portion,
Wherein,
A security authentication interface unit connected to the external device; And
And a security authentication unit for transmitting an arbitrary number generated on the side of the external device, receiving the encrypted key encryption using the random number, and decrypting the received key encryption to perform security authentication to determine access authentication,
The gateway comprises:
The re-authentication is attempted within the predefined authentication retry overrun for the external device that has not succeeded in authentication, and if the number of authentication failure times exceeds the authentication retry excess range, the connection of the external device is blocked ,
The external device that has succeeded in authentication is continuously checked to check the connection state to disconnect the network immediately by controlling the bus direct connection circuit portion in case of connection loss and to send another message while the reprogramming is in progress during the diagnostic communication control period with the external device So as not to be activated. The plasma display apparatus according to claim 1, wherein the bus direct-
A multiplexer unit consisting of at least one multiplexer so that a communication channel can be physically connected directly by the bus direct connection circuit control signal; And
And at least one communication transceiver directly connected by said at least one multiplexer and having a communication channel directly connected to said diagnostic communication controller. The communication system according to claim 2,
CAN communication is performed based on the received signal. 3. The apparatus of claim 2,
Wherein the bus direct connection circuit control signal is input from one of the four channels so that at least one of the three communication transceivers can be directly connected to the communication channel. delete delete delete A diagnostic communication method for a vehicle, which is connected to an external device and performs diagnosis,
(a1) transmitting a random number to the external device when the external device is connected, and receiving encrypted key encryption from the external device using the random number; And
(a2) decrypting the received key encryption to perform security authentication to determine success or failure of access authentication, and confirming information of a diagnostic communication controller requiring access;
(a3) Repeating the steps (a1) and (a2) for an external device that has not succeeded in authentication within the predefined authentication retry excess range, and attempts to re-authenticate, Blocking the connection of the external device when the retry overrange is exceeded;
(a4) stopping the routing function so that another message is not activated during the reprogramming in the diagnostic communication control period with the external device upon successful authentication;
(b) performing a direct routing with the external device by forming a vehicle communication channel between the external device and the diagnostic communication controller so that the communication channel is physically directly connected according to the result of the checking; And
(c) continuously checking the connection status of the external device that has succeeded in authentication, and disconnecting the network physically directly connected to the diagnostic communication controller immediately upon connection loss. delete 9. The method of claim 8, wherein performing direct routing comprises:
And at least one communication transceiver directly coupled to the diagnostic communication controller and directly connected to the communication channel, the at least one multiplexer being physically connected to the communication channel by a bus direct connection control signal, The method comprising the steps of: delete delete
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KR20190081958A (en) 2017-12-29 2019-07-09 주식회사 유라코퍼레이션 System and method for controlling load factor of internal communication bus of car, and a recording medium having computer readable program for executing the method
KR20190119514A (en) 2018-04-05 2019-10-22 한국전자통신연구원 On-board cybersecurity diagnostic system for vehicle, electronic control unit, and operating method thereof
US10546436B2 (en) 2017-06-23 2020-01-28 Hyundai Motor Company Vehicle test system having a gateway for determining whether an electronic device is testable, vehicle and vehicle test method
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CN115333977A (en) * 2022-08-11 2022-11-11 南京国电南自电网自动化有限公司 System diagnosis channel realization method and device based on network interface

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US10546436B2 (en) 2017-06-23 2020-01-28 Hyundai Motor Company Vehicle test system having a gateway for determining whether an electronic device is testable, vehicle and vehicle test method
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