KR101073291B1 - Network system of in-vehicle and control method thereof - Google Patents

Abstract

The present invention relates to a network system in a vehicle and a control method thereof. A network system in a vehicle using a plurality of different network protocols may include: a first electronic controller for exchanging data through a first bus according to a first network protocol; A second electronic controller for exchanging data through a second bus according to a second network protocol; A gateway device which receives a management message from the first electronic control unit and the second electronic control unit by a first network protocol and a second network protocol, and converts the received management message into an integrated network status message; And a display device configured to receive an integrated network status message from the gateway device and display status information of the first electronic controller and the second electronic controller. As a result, when an error occurs in the vehicle, not only the user is appropriately notified by notifying the user appropriately, but also the effect of lowering the possibility of an unexpected accident is provided.

Description

In-vehicle network system and its control method {NETWORK SYSTEM OF IN-VEHICLE AND CONTROL METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network system in a vehicle and a method of controlling the same. More particularly, the present invention relates to a network system and a control system for performing data exchange with each other in a network system using a plurality of different network protocols in a vehicle. It is about a method.

The development of intelligent technology of vehicles is increasing as general vehicles such as passenger cars and buses and military vehicles (hereinafter, referred to as 'vehicles') are gradually becoming more functional / advanced. In general, in order to implement an intelligent vehicle, status information such as the position and speed of the vehicle and environmental information on the outside of the vehicle must be recognized and detected in real time, and the vehicle can be controlled automatically such as semi-automatic or to avoid an accident. Should be

For this reason, intelligent intelligent vehicles require various intelligent sensing and control algorithms, such as a driver assistance system that controls a portion of the vehicle or a collision warning system that provides information to the driver and warns of dangerous situations. . In particular, as the intelligence of the vehicle evolves to a high level, the number of additional electronic components such as acceleration sensors, temperature sensors, radar sensors, and various control motors of the vehicle is rapidly increasing.

As the intelligent vehicle as described above, an in-vehicle network system for connecting electronic components, an electronic control unit (ECU), a switch, and the like with a shared wire has been studied. Protocols such as Local Interconnect Network (LIN) protocol, Controller Area Network (CAN) protocol, and FlexRay protocol are used.

Accordingly, various types of sensors for driving or safety of the vehicle, and for the convenience of the driver are connected to the electronic controller and the actuator through various communication protocols as described above to monitor the vehicle status.

However, in the conventional in-vehicle network system, even if an error occurs in the vehicle according to the monitoring as described above, a driving user may not recognize it.

Therefore, in order to prevent the occurrence of an unexpected accident due to a failure in the vehicle while driving, it is necessary to appropriately notify the user when an error occurs in the vehicle.

In addition, if an error occurs in the electronic control unit that is in charge of the main tasks such as maintaining the driver's life and safety, such as an engine and a brake, it may cause a serious accident. There is a need to implement more robust in-vehicle network systems.

It is therefore an object of the present invention to provide a network system in a vehicle and a method of controlling the same, which provide a means for appropriately notifying a user when an error occurs in the vehicle while driving.

In addition, even if an error occurs in the main electronic control unit related to the driver's life and safety maintenance, it can be handled by another electronic control unit to increase the reliability of safety by flexibly selecting resources inside the vehicle according to the situation. It is to provide a network system and a control method therefor.

The above object is a network system in a vehicle using a plurality of different network protocols, comprising: a first electronic control unit for exchanging data through a first bus according to a first network protocol; A second electronic controller for exchanging data through a second bus according to a second network protocol; A gateway device which receives a management message from the first electronic control unit and the second electronic control unit by a first network protocol and a second network protocol, and converts the received management message into an integrated network status message; It may be achieved by a network system in a vehicle including a display device for receiving an integrated network status message from the gateway device and displaying status information of the first electronic controller and the second electronic controller.

The display apparatus may use a network protocol having a maximum bandwidth among the plurality of network protocols.

The gateway device may periodically monitor a management message received from the first electronic controller and the second electronic controller to determine whether at least one of the first electronic controller and the second electronic controller is in error.

In addition, when an error occurs in the first electronic controller, the display device may select the second electronic controller to perform a function of the first electronic controller.

In addition, the first electronic controller may be a main electronic controller that controls the performance of the main functions of the vehicle, and the second electronic controller may be an additional electronic controller that controls the performance of the additional functions of the vehicle.

On the other hand, the above object is, in a control method of a network system in a vehicle using a plurality of different network protocols, the gateway device receives a management message of the first electronic control unit via a first bus according to the first network protocol. Steps; Receiving, by the gateway device, a management message of a second electronic controller through a second bus according to a second network protocol; Converting the management message received at the gateway device into an integrated network status message; Transmitting the converted unified network status message to a display device; The display apparatus may further include displaying the state information of the first electronic controller and the second electronic controller included in the received integrated network status message by the control method of the network system in the vehicle.

The display apparatus may use a network protocol having a maximum bandwidth among the plurality of network protocols.

The method may further include determining whether at least one of the first electronic controller and the second electronic controller is in error by periodically monitoring a management message received from the first electronic controller and the second electronic controller. It may include.

The method may further include selecting a second electronic controller to perform a function of the first electronic controller when an error occurs in the first electronic controller.

In addition, the first electronic controller may be a main electronic controller that controls the performance of the main functions of the vehicle, and the second electronic controller may be an additional electronic controller that controls the performance of the additional functions of the vehicle.

As described above, the network system and the control method of the vehicle interior according to the present invention, if an error occurs in the vehicle while driving, not only to notify the user appropriately to provide convenience to the driver, but also to prevent accidents. It has the effect of lowering the probability.

In addition, even if an error occurs in the main electronic controller related to the driver's life and safety maintenance, other electronic controllers can handle the error, thereby increasing the reliability of the safety by allowing the inside of the vehicle to be flexibly selected according to the situation. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of an in-vehicle network system 1 in a vehicle according to an embodiment of the present invention.

The network system 1 in a vehicle according to the present invention integrates and manages a network using a plurality of network protocols different from each other. As shown in FIG. 1, at least one first electronic control unit 10a and 10b, at least one second electronic control unit 20a and 20b, and at least one network system 1 in a vehicle according to the present invention are illustrated in FIG. 1. The third electronic controllers 30a and 30b, the gateway device 40, and the display device 50.

Here, each of the first electronic controllers 10a and 10b, the second electronic controllers 20a and 20b, and the third electronic controllers 30a and 30b may have various forms for driving or safety of the vehicle, and for the convenience of the driver. It is implemented by an electronic control unit (ECU) which is connected to a sensor and an actuator by a predetermined network protocol and monitors a vehicle state.

The first electronic controllers 10a and 10b exchange data with each other according to the first network protocol and are interconnected through the first bus 11. In addition, the second electronic controllers 20a and 20b exchange data with each other according to the second network protocol and are interconnected through the second bus 21, and the third electronic controllers 30a and 30b interoperate with the third network protocol. And exchange data in accordance with the third bus (31).

Here, the first network protocol, the second network protocol, and the third network protocol are set to different network protocols, and in the present invention, the first network protocol is a LIN (Local Interconnect Network) protocol, and the second network protocol is CAN ( Controller Area Network) protocol, and the third network protocol is described as an example that the FlexRay protocol.

On the other hand, the network system 1 of the vehicle interior of the present invention includes not only the case of using all LIN protocol, CAN protocol, FlexRay protocol, but also the case of using two or more different protocols.

The gateway device 40 is connected to the first electronic controllers 10a and 10b through the first bus 11 to exchange data according to the first network protocol, that is, the LIN protocol, and through the second bus 21. Connected to the second electronic controllers 20a and 20b to exchange data according to a second network protocol, that is, a CAN protocol, and connected to the third electronic controllers 30a and 30b through a third bus 31. 3 Exchange data according to network protocol, ie FlexRay protocol.

Here, the data according to the LIN protocol is called LIN data, the data according to the CAN protocol is called CAN data, and the data according to the FlexRay protocol is called FlexRay data.

On the other hand, the gateway device 40, LIN data, CAN data so that the first electronic control unit (10a, 10b), the second electronic control unit (20a, 20b) and the third electronic control unit (30a, 30b) can exchange data with each other. You can convert between and FlexRay data.

Specifically, the LIN data transmitted from the first electronic controllers 10a and 10b to the second electronic controllers 20a and 20b is transferred from the first electronic controllers 10a and 10b through the first bus 11. 40, the gateway device 40 analyzes the LIN data transmitted from the first electronic controllers 10a and 10b to generate CAN data. In addition, the gateway device 40 transmits the generated CAN data to the corresponding second electronic controllers 20a and 20b through the second bus 21.

Data can be exchanged between the first electronic controllers 10a and 10b and the third electronic controllers 30a and 30b and between the second electronic controllers 20a and 20b and the third electronic controllers 30a and 30b in the same manner. have.

Through the above configuration, the network system 1 in the vehicle according to the present invention enables data exchange between networks using different network protocols. Accordingly, it is possible to integrate management by network management techniques for individual networks using different network protocols.

Meanwhile, in the network system 1 in the vehicle using the network management technique of the present invention, the first electronic controllers 10a and 10b, the second electronic controllers 20a and 20b, and the third electronic controllers 30a and 30b Other nodes on the same network are monitored and each network status is communicated to the gateway device 40.

For example, the first electronic controllers 10a and 10b, the second electronic controllers 20a and 20b, and the third electronic controllers 30a and 30b each write a management message including a network state by using a network protocol set in each of them. It transmits to the gateway device 40 according to the set period.

The gateway device 40 monitors a management message received from each of the first electronic controllers 10a and 10b, the second electronic controllers 20a and 20b, and the third electronic controllers 30a and 30b.

FIG. 2 is a block diagram showing the configuration of the gateway device 40 and the display device 50 of the in-vehicle network system 1 in the vehicle according to an embodiment of the present invention.

As shown in FIG. 2, the gateway device 40 manages messages of the first message input / output unit 41 and the second electronic controllers 20a and 20b that receive the management messages of the first electronic controllers 10a and 10b. And a second message input / output unit 42 for receiving a message, and a third message input / output unit 43 for receiving a management message of the third electronic controllers 30a and 30b.

Herein, the number of message input / output units corresponds to the number of types of network protocols of the in-vehicle network system 1 in the vehicle of the present invention.

The gateway device 40 compares data for integrating and comparing network status information using management messages received from each message input / output unit 41, 42, 43, and displays a message for notifying a user according to the comparison result. A data comparison converter 44 for converting to correspond to 50, a fourth message input / output unit 45 for outputting a message output from the data comparison converter 44 to the display device 50, and a data comparison converter ( It further includes a data storage unit 46 for storing the comparison result of 44).

The gateway device 40 monitors the management messages received from the message input / output units 41, 42, and 43 according to a preset period, and monitors the network of the electronic jay units 10a, 10b, 20a, 20b, 30a, and 30b. Understand the condition.

Specifically, since each of the electronic controllers 10a, 10b, 20a, 20b, 30a, and 30b includes an algorithm for network management, the data comparison and conversion unit 44 may include the electronic controllers 10a, 10b, 20a, and 20b. When the network management messages received from the network management messages 30a and 30b are integrated and compared, the electronic control unit 10a, 10b, 20a or 20b is identified by identifying the number and time of not transmitting the network management messages. It is determined whether or not the error for (30a, 30b).

The data comparison converter 44 detects a change in state by comparing each network state with an existing state, and generates data integrating the network states of the entire electronic controllers 10a, 10b, 20a, 20b, 30a, and 30b. . In addition, the generated network state data is converted into a message that can be received by the display apparatus 50, and the converted network state message is transmitted to the display apparatus 50 through the fourth message input / output unit 45.

The integrated data of the network state generated by the data comparison converter 44 is stored in the data storage 46 in real time together with the time information.

Here, the data comparison converter 44 may be implemented through a predetermined software program and a processor such as a microcomputer, a CPU, etc., which loads and executes the program.

Meanwhile, the gateway device 40 uses OSEK / VDX's vehicle real-time operating system to ensure that the deadline execution time of all task executions is not exceeded, thereby ensuring high reliability of time for providing information to the user.

Meanwhile, referring to FIG. 2, the display apparatus 50 includes a fifth message input / output unit 51 for receiving an integrated network status message from the gateway device 40, and a data converter 52 for converting the received integrated network status message. And a display unit 53 for displaying the information output from the data converter 52.

The fifth message input / output unit 51 transmits an integrated network status message to all the electronic controllers 10a, 10b, 20a, 20b, 30a, and 30b from the gateway device 40 by a network protocol supported by the display apparatus 50. Receive.

The data conversion unit 52 converts the received integrated network status message into a signal in a format that the display unit 53 can display, and the display unit 53 converts the information included in the signal received from the data conversion unit 52. Display.

The display unit 53 includes a display panel (not shown) for displaying information, and a panel driver (not shown) for processing a signal input from the data converter 52 to be displayed on the display panel (not shown).

The display panel (not shown) according to the present invention includes an LCD, an LED panel, and the like, and may be connected and displayed with a separate projector device in some cases.

3 illustrates an example of a display screen of integrated network status information of an electronic controller according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the display screen 60 displayed on the display unit 53 may include a form 61 of a vehicle, a state of each electronic control unit, etc. so that a user may easily determine whether an error occurs in each electronic control unit. It includes.

In this case, the display screen 60 may be displayed as a normal state 62 for each electronic control unit, a state 63 in which the electronic control unit is momentarily stopped, or a state 64 removed from the network after a predetermined time.

On the other hand, the display device 50 is a device that can be mounted on a vehicle and includes a display module, and there is no limitation on the type of the device. In the present invention, the display device 50 (eg, MOST) using a network protocol having the maximum bandwidth is used. An example of displaying a status message).

Meanwhile, according to another exemplary embodiment of the present invention, each of the first electronic controllers 10a and 10b, the second electronic controllers 20a and 20b, and the third electronic controllers 30a and 30b may be a vehicle user. The main electronic control unit for critical functions such as life and system safety maintenance and the additional electronic control unit for additional functions such as air conditioner or power window can be classified.

When an abnormal state of the monitoring result of each electronic controller occurs on the display screen 60, the display apparatus 50 may display whether the electronic controller is a main electronic controller or an additional electronic controller.

Accordingly, the display screen 60 may further display a list of additional electronic controllers capable of processing core functions of the main electronic controller in which an error occurs. If the user selects any one of the displayed lists, the additional electronic control unit processes the selected main task instead of the unique additional task.

Here, the display device 50 may make the user's selection easier by using criteria such as occupant safety level.

Specifically, weights are assigned to each electronic control unit according to the importance for maintaining the life of the occupant, and when a state abnormality occurs such as receiving a message that is determined to be a malfunction from a specific electronic control unit, the weight of the occupant is reduced by the corresponding weight. You can lower the safety level.

For example, if level 5 is set to the maximum value at which the state of the vehicle is determined to be the safest, then level 4 is a minor condition in which the air conditioner and the air conditioner are not operated, and level 3 or less has a significant effect on the occupant's safety. Can be set.

Accordingly, when the level 3 or less, the user may give up the unique function of the additional electronic controller, and select the main function assigned to the main electronic controller in which an error occurs.

As a specific operation, for example, if the main electronic controller responsible for throttle valve control of the engine causes an abnormal state, the display device 50 displays the abnormal state and the safety level of the main electronic control unit.

Accordingly, the display device 50 may warn the user that the safety level is 3 or less, and present a selection of "Do you want to give up the additional function and increase the safety level?" To the user. Here, when the user selects to increase the safety level, the available additional electronic controller, that is, the additional electronic controller in charge of the monitor, the speaker, the air conditioner, etc. is displayed, and when the driver selects the additional electronic controller in charge of the air conditioner from the displayed list, The additional electronic controller does not perform the air conditioner function, but instead performs the core function of the throttle valve control.

To this end, the gateway device 40 determines the state of the entire electronic control unit through network monitoring, transmits the corresponding information to the display device 50, and selects a user through a user input unit (not shown) of the display device 50. Receives and transmits a command to perform the core function assigned to the primary electronic controller in which the error occurred in the secondary electronic controller selected to perform the core function.

Hereinafter, the control method of the network system 1 in the vehicle having the above configuration will be described with reference to FIG. 4.

First, as shown in FIG. 4, the gateway device 40 periodically monitors a management message received from the electronic controllers 10a, 10b, 20a, 20b, 30a, and 30b (S11).

The gateway device 40 generates an integrated network status message by integrating and comparing the received management messages (S12). Here, the gateway device 40 may store the generated unified network status message.

The gateway device 40 converts the integrated network status message generated in step S12 into a message that can be received by the display device 50 (S13).

The converted message in step S13 is transmitted to the display device 50 (S14). Here, the display device 50 is a device having a display module mounted inside the vehicle, and may be a device using the largest network bandwidth.

The display apparatus 50 converts the received integrated network status message into a signal that can be displayed on the display unit 53 (S15).

The display apparatus 50 displays the information included in the signal converted in step S15 to the user (S16). When the information displayed in step S16 includes a state abnormality of the main electronic control unit, the display screen 60 includes an additional electronic control unit capable of performing not only the state abnormality information of the main electronic control unit but also a function of the main electronic control unit in which a state abnormality has occurred. The list of can be displayed to be selectable.

Next, the user can select a predetermined additional electronic controller to perform a function of the main electronic controller on the display screen 60 of step S16 (S17).

The display device 50 transmits the selection information of step S17 to the gateway device 40, and the gateway device 40 performs a command to perform a core function of the main electronic control unit in which a state abnormality occurs in the additional electronic control unit selected in step S17. Transmit (S18).

As mentioned above, the present invention has been described in detail through preferred embodiments, but the present invention is not limited thereto and may be variously implemented within the scope of the claims.

1 is a block diagram showing the configuration of a network system inside a vehicle according to an embodiment of the present invention.

2 is a block diagram illustrating a configuration of a gateway device and a display device of a network system in a vehicle according to an embodiment of the present invention.

3 is a view showing an example of a display screen of the integrated network status information of the electronic control unit according to an embodiment of the present invention,

4 is a flowchart illustrating a control method of a network system in a vehicle.

* Explanation of symbols for the main parts of the drawings

1: network system inside the vehicle

10a, 10b: first electronic controller 11: first bus

20a, 10b: second electronic control unit 21: the second bus

10a, 10b: first electronic controller 31: third bus

40: gateway device 50: display device

Claims (10)

In a network system in a vehicle using a plurality of different network protocols, A first electronic controller for exchanging data via a first bus according to the first network protocol; A second electronic controller for exchanging data through a second bus according to a second network protocol; A third electronic controller for exchanging data through a third bus according to a third network protocol; Receives a management message from the first electronic controller, the second electronic controller and the third electronic controller by a first network protocol, a second network protocol and a third network protocol, respectively, and integrates the received management messages into an integrated network state. A gateway device which converts the message into a message and detects an error of a network in comparison with an existing state; And a display device for receiving an integrated network status message from the gateway device and displaying status information of the first electronic controller, the second electronic controller, and the third electronic controller. The method of claim 1, The display apparatus uses a network protocol having a maximum bandwidth among the plurality of network protocols. The method according to claim 1 or 2, The gateway device periodically monitors a management message received from the first electronic controller, the second electronic controller, and the third electronic controller, thereby performing at least one of the first electronic controller, the second electronic controller, or the third electronic controller. Network system in the vehicle, characterized in that for determining whether the error. The method of claim 3, The display apparatus, if an error occurs in any one of the electronic control unit, the network system in the vehicle, characterized in that to select to perform the function of the other electronic control unit does not occur. 5. The method of claim 4, The first electronic control unit is a main electronic control unit for controlling the performance of the main function of the vehicle, And the second electronic controller is an additional electronic controller that controls performance of the additional function of the vehicle. In a control method of a network system in a vehicle using a plurality of different network protocols, Receiving, by the gateway device, a management message of the first electronic control unit via a first bus according to the first network protocol; Receiving, by the gateway device, a management message of a second electronic controller through a second bus according to a second network protocol; Receiving, by the gateway device, a management message of a third electronic controller through a third bus according to a third network protocol; Integrating the management message received by the gateway device into an integrated network status message, and detecting an error of the network by comparing with an existing status; Transmitting the converted unified network status message to a display device; And displaying, by the display device, status information of the first electronic controller, the second electronic controller, and the third electronic controller included in the received integrated network status message. . The method of claim 6, And the display apparatus uses a network protocol having a maximum bandwidth among the plurality of network protocols. 8. The method according to claim 6 or 7, The gateway device periodically monitors a management message received from the first electronic control unit, the second electronic control unit, and the third electronic control unit to monitor at least one of the first electronic control unit, the second electronic control unit, or the third electronic control unit. The control method of the network system in the vehicle, characterized in that it further comprises the step of determining whether one error. The method of claim 8, If an error occurs in any one of the electronic control unit, the control method of the network system in the vehicle further comprising the step of selecting to perform the function of the other electronic control unit does not occur. 10. The method of claim 9, The first electronic control unit is a main electronic control unit for controlling the performance of the main function of the vehicle, And the second electronic controller is an additional electronic controller that controls performance of the additional function of the vehicle.

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