CN113746878A - System and method for vehicle-mounted T-Box and vehicle-mounted equipment to access external network - Google Patents
System and method for vehicle-mounted T-Box and vehicle-mounted equipment to access external network Download PDFInfo
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- CN113746878A CN113746878A CN202010469736.9A CN202010469736A CN113746878A CN 113746878 A CN113746878 A CN 113746878A CN 202010469736 A CN202010469736 A CN 202010469736A CN 113746878 A CN113746878 A CN 113746878A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
Abstract
The invention relates to a vehicle-mounted T-Box, a system and a method for accessing an external network by vehicle-mounted equipment, wherein the vehicle-mounted T-Box comprises a first processor, a first MCU (microprogrammed control unit) and a network communication module; the first processor is provided with a USB interface and an SPI interface, the USB interface is used for being connected with the vehicle-mounted AVNT through a USB wire harness to receive entertainment data of the vehicle-mounted AVNT, the USB interface is provided with a virtual network card and a virtual serial port, the SPI interface is used for being in communication connection with the first MCU, and the first MCU is used for acquiring vehicle body data of a finished vehicle CAN network and sending the vehicle body data to the first processor; a first data path and a second data path are arranged between the first processor and the network communication module, and the first processor is used for sending the entertainment data to the network communication module through the first data path. The invention can improve the network information safety of the automobile.
Description
Technical Field
The invention relates to the technical field of automobile communication, in particular to a system and a method for accessing an external network by a vehicle-mounted T-Box and vehicle-mounted equipment.
Background
With the interconnection and intellectualization of automobiles, automobiles are no longer isolated and are increasingly integrated into the internet. At the same time, the automobile is also slowly becoming a potential network attack target, and the network security of the automobile has become the basis of the automobile security and is receiving more and more attention and attention.
In order to ensure the safety of sensitive information of a vehicle body, a vehicle networking system of an automobile is connected with an external network by adopting two mutually independent network entities of a vehicle-mounted T-Box and a vehicle-mounted entertainment audio and video system AVNT, a 4G/5G network communication module is carried on the T-BOX, and the AVNT is further carried with a second 4G/5G network communication module to realize the isolation of a network for sensitive data such as vehicle body control and the like from a public network. Secondly, the network-using AVNT can perform data path manipulation on the network communication module through the control command, both of which affect the security of the automobile network.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention aims to provide a system and a method for accessing an external network by a vehicle-mounted T-Box and vehicle-mounted equipment, so as to solve the technical problem of automobile network information safety caused by the fact that a network communication module for providing a network and an AVNT (Audio video network) using the network are integrally arranged on hardware.
In a first aspect, an embodiment of the present invention provides a vehicle-mounted T-Box, which is characterized by including a first processor, a first MCU, and a network communication module; the first processor is provided with a USB interface and an SPI interface, the USB interface is used for being connected with the vehicle-mounted AVNT through a USB wire harness to receive entertainment data of the vehicle-mounted AVNT, the USB interface is provided with a virtual network card and a virtual serial port, the SPI interface is used for being in communication connection with the first MCU, and the first MCU is used for acquiring vehicle body data of a finished vehicle CAN network and sending the vehicle body data to the first processor; a first data path and a second data path are arranged between the first processor and the network communication module, the first processor is used for sending the entertainment data to the network communication module through the first data path and sending the vehicle body data to the network communication module through the second data path; the network communication module is used for sending the entertainment data to a preset third party through a public network and sending the vehicle body data to a TSP background through the internet of vehicles.
Preferably, the first processor is further configured to filter the first network control instruction when the USB interface receives the first network control instruction of the vehicle-mounted AVNT.
Preferably, a control channel is further arranged between the first processor and the network communication module; the first MCU is also used for receiving a second network control instruction of the whole vehicle CAN network and sending the second network control instruction to the first processor, the first processor is also used for sending the second network control instruction to the network communication module through the control channel, and the network communication module is also used for executing the second network control instruction after receiving the network control instruction.
Preferably, the first processor is further provided with an SGMII interface, the SGMII interface is configured to be connected to an external device through a network switch, and the network switch is configured to control connection or disconnection between the SGMII interface and the external device.
In a second aspect, an embodiment of the present invention provides a system for a vehicle-mounted device to access an external network, including a vehicle-mounted AVNT and a vehicle-mounted T-Box according to the foregoing description; the vehicle-mounted AVNT is connected with a USB interface of the vehicle-mounted T-Box through a USB wiring harness, and sends entertainment data to the vehicle-mounted T-Box through the USB wiring harness and the USB interface.
Preferably, the vehicle-mounted AVNT comprises a second processor and a second MCU connected with the second processor; the second MCU is used for acquiring vehicle body data of the whole vehicle CAN network and sending the vehicle body data to the second processor; and the second processor is connected with the USB interface of the vehicle-mounted T-Box through the USB wiring harness.
In a third aspect, an embodiment of the present invention provides a method for a vehicle-mounted device to access an external network, where the method is implemented based on the vehicle-mounted T-Box, and the method includes:
the first processor receives entertainment data of the vehicle-mounted AVNT through the USB interface, and sends the entertainment data to the network communication module through the first data path, and the network communication module sends the entertainment data to a preset third party through a public network;
the method comprises the steps that a first MCU acquires vehicle body data of a whole vehicle CAN network and sends the vehicle body data to a first processor; the first processor receives the vehicle body data through the SPI interface and sends the vehicle body data to the network communication module through a second data path; and the network communication module sends the vehicle body data to the TSP background through the Internet of vehicles.
Preferably, the method further comprises:
when the first processor receives a first network control instruction of the vehicle-mounted AVNT through the USB interface, the first processor filters the first network control instruction.
Preferably, a control channel is further arranged between the first processor and the network communication module;
the method further comprises the following steps:
first MCU receives whole car CAN network's second network control command, and will second network control command sends to first treater, and first treater passes through the SPI interface and receives second network control command, and will second network control command passes through control channel sends to network communication module, and network communication module is receiving behind the network control command, the execution second network control command.
Preferably, the method further comprises:
initializing a network communication module, a USB interface and an SPI interface, configuring 2 APNs for the network communication module to form a first data path and a second data path, and configuring a virtual network card and a virtual serial port for the USB interface;
setting network parameters of a virtual network card, and establishing a data forwarding rule among the virtual network card, a network communication module and a public network so that the vehicle-mounted AVNT accesses an external network through the virtual network card;
starting entertainment data service of the first processor, so that the first processor receives entertainment data of the vehicle-mounted AVNT through the USB interface and sends the entertainment data to the network communication module through the first data path;
starting a vehicle body data service of a first processor to enable a first MCU to acquire vehicle body data of a whole vehicle CAN network and send the vehicle body data to the first processor; the first processor receives the vehicle body data through the SPI interface and sends the vehicle body data to the network communication module through a second data path;
starting a network management service of the first processor to enable the first processor to filter the first network control instruction and send the second network control instruction to the network communication module;
and adding a driving program of the virtual network card and the virtual serial port, so that the vehicle-mounted AVNT uses a data network and network management service provided by the vehicle-mounted T-BOX through a USB wire harness.
Any of the above embodiments has at least the following beneficial effects:
the vehicle-mounted AVNT is connected with the vehicle-mounted AVNT through a USB wire harness, a data network is provided for the vehicle-mounted AVNT through a network communication module of the vehicle-mounted T-box, so that the vehicle-mounted AVNT CAN access an external network through the network provided by the vehicle-mounted T-box, and a first data channel and a second data channel which are independent are constructed in the vehicle-mounted T-box, wherein entertainment data of the vehicle-mounted AVNT are sent to the network communication module through the first data channel, body data of a vehicle CAN network are sent to the network communication module through the second data channel, and the network communication module is used for sending the entertainment data to a preset third party through a public network and sending the body data to a TSP background through a vehicle networking. Based on the above description, the vehicle-mounted AVNT and the network communication module are innovatively isolated on hardware, and the technical problem of automobile network information safety caused by the fact that the network communication module providing the network and the AVNT using the network are integrally arranged on the hardware can be solved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a vehicle-mounted T-Box according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the transmission of entertainment data of the entire vehicle CAN network in an embodiment of the present invention.
Fig. 3 is a schematic diagram of the transmission of vehicle body data of the vehicle-mounted AVNT according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a vehicle-mounted AVNT according to another embodiment of the present invention.
Fig. 5 is a flowchart illustrating a method for an on-board device to access an external network according to another embodiment of the present invention.
The labels in the figure are:
1-vehicle-mounted T-Box, 11-first processor, 12-first MCU, 13-network communication module, 2-vehicle-mounted AVNT, 21-second processor, 22-second MCU, 23-USB wiring harness, 3-network switch and 4-external equipment.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, well known means have not been described in detail so as not to obscure the present invention.
As shown in fig. 1-3, an embodiment of the present invention provides a vehicle-mounted T-Box1(Telematics Box, referred to as vehicle-mounted T-Box1 for short), including a first processor 11, a first MCU12, and a network communication module 13; the first processor 11 is provided with a USB interface and an SPI interface, the USB interface is used for being connected with a vehicle-mounted AVNT2 through a USB wiring harness 23 to receive entertainment data of a vehicle-mounted AVNT2, the USB interface is configured with a virtual network card and a virtual serial port, the SPI interface is used for being in communication connection with the first MCU12, and the first MCU12 is used for acquiring vehicle body data of a whole vehicle CAN network and sending the vehicle body data to the first processor 11; a first data path and a second data path are arranged between the first processor 11 and the network communication module 13, and the first processor 11 is used for sending the entertainment data to the network communication module 13 through the first data path and sending the vehicle body data to the network communication module 13 through the second data path; the network communication module 13 is used for sending the entertainment data to a preset third party through a public network and sending the vehicle body data to a TSP background through the internet of vehicles.
Specifically, the vehicle-mounted AVNT2(A: audio, V: video, N: navigation, T: wireless communication) is an entertainment audio and video system of an automobile, and is provided with a display which can be used for displaying a navigation path in the driving process, playing audio and video and the like, wherein the vehicle-mounted AVNT2 can play/display local data in the using process, utilize locally cached map data for navigation, and can also access an external public network to acquire corresponding data, such as high-precision map data, audio data, video data and the like. For example, the AVNT2 is provided with a high-grade map APP, and the high-grade map APP of the AVNT2 sends a vehicle body data request to a server (namely a preset third party) of the high-grade map to download high-precision map data; for another example, the AVNT2 has music APP installed, and the music APP of AVNT2 sends a download request to a digital music server (i.e., a predetermined third party) to download music data, which all belong to the delivery of entertainment data, and do not involve network control or firmware upgrade control of the network communication module 13.
The vehicle-mounted T-Box1 is mainly used for communicating with a background system/mobile phone APP, and vehicle information display and control of the mobile phone APP are achieved. In the embodiment, the vehicle-mounted T-Box1 provides a USB interface to the vehicle-mounted AVNT2, and the vehicle-mounted AVNT2 is in communication connection with the vehicle-mounted T-Box1 through the USB interface, so that the network of the vehicle-mounted AVNT2 is provided by the network communication module 13 of the vehicle-mounted T-Box 1. The TSP background is a background system of a TSP (telematics Service provider) automobile remote Service provider, and automobiles in the internet of vehicles need to interact with the TSP background, including the steps that the automobiles upload the data of the whole automobiles to the TSP background of the internet of vehicles, the automobiles receive the data of other automobiles shared by the TSP background, the automobiles receive the traffic environment data shared by the TSP background, and the like.
In this embodiment, a dedicated first data path is provided for transferring the entertainment data of the vehicle-mounted AVNT2 accessing the external shared network, a dedicated second data path is provided for transferring the vehicle body data, the network communication module 13 is provided with a first APN corresponding to the first data path and a second APN corresponding to the first data path, as shown in fig. 2, when the first processor 11 receives the specific transfer process of the entertainment data, the first processor 11 sets a first APN corresponding to the first data path and a second APN corresponding to the first data path
AVNT2, the received entertainment data is sent to the network communication module 13 via the first data path. As shown in fig. 3, which is a specific transfer process of the T-box body data, when the first processor 11 receives the body data of the entire vehicle CAN network sent by the first MCU12, the received body data is sent to the network communication module 13 through the second data path.
Based on the above description, in the embodiment, the vehicle-mounted AVNT2 and the network module are isolated from each other in hardware, so that the situation that malicious software exists on the network-used AVNT2 to directly upgrade the firmware of the network communication module 13 and viruses are injected in the firmware layer can be avoided, and even if the malicious software exists on the vehicle-mounted AVNT2, the network environment of the network communication module 13 and the network communication of the vehicle data are not affected by the embodiment.
The network communication module 13 is preferably, but not limited to, a 4G or 5G network communication module 13 to provide a 4G or 5G network for the vehicle-mounted AVNT 2. The USB interface is preferably but not limited to a USB interface, and the USB interface is configured with a virtual network card and a virtual serial port, wherein the first processor 11 is preferably but not limited to a processor chip (AP) with an arm architecture, runs a linux system, and can support the USB virtual network card. It can be understood that, in this embodiment, the vehicle-mounted T-Box1 is equivalent to a USB wireless network card of the vehicle-mounted AVNT2, the USB wireless network card is internally provided with the 4G or 5G wireless network communication module 13, and in this embodiment, the vehicle-mounted AVNT2 is not internally provided with the network communication module 13, but interacts with a public network through the vehicle-mounted T-Box1, which is a USB wireless network card. When the USB wireless network card is used, the network communication module 13 presets the network parameters of the USB virtual network card and the data forwarding rules between the USB virtual network card, the 4G or 5G network, and the external public network, and it should be noted that the network parameters of the USB wireless network card and the related data forwarding rules are set as technical contents known in the art and can be obtained by referring to the existing USB wireless network card, and therefore, details are not described here. Based on this, the vehicle-mounted AVNT2 connected with the vehicle-mounted T-Box1 through the USB interface can use the network provided by the network communication module 13 of the T-BOX through the virtual network card; through the virtual serial port, the vehicle body data of the vehicle-mounted AVNT2 can be transmitted.
In a specific embodiment, the first processor 11 is further configured to filter the first network control instruction when the USB interface receives the first network control instruction of the vehicle-mounted AVNT 2.
Specifically, the first control instruction is a network control instruction to the network communication module 13 of the in-vehicle T-Box1, for example, to turn off the network and turn on the network. In the embodiment, the vehicle-mounted AVNT2 and the network communication module 13 are separated in hardware, a data network used by the vehicle-mounted AVNT2 is provided by the vehicle-mounted T-Box1, the vehicle-mounted T-Box1 provides a USB interface to the vehicle-mounted AVNT2 only through the USB wire harness 23, and network control instructions of the vehicle-mounted AVNT2 are filtered, so that the risk of manipulating the 4G/5G network on the T-BOX through the AVNT2 is avoided.
In a specific embodiment, a control channel is further disposed between the first processor 11 and the network communication module 13; first MCU12 still is used for receiving the second network control instruction of whole car CAN network, and will second network control instruction send to first treater 11, first treater 11 still be used for with second network control instruction passes through control channel sends to network communication module 13, network communication module 13 still is used for receiving behind the network control instruction, the execution second network control instruction.
Specifically, the second control instruction is a network control instruction to the network communication module 13 of the vehicle-mounted T-Box1, for example, to turn off the network and turn on the network.
In a specific embodiment, the first processor 11 is further provided with an SGMII interface, the SGMII interface is configured to be connected to the external device 4 through a network switch 3, and the network switch 3 is configured to control connection or disconnection between the SGMII interface and the external device 4.
In addition, another embodiment of the present invention further provides a system for accessing an external network by a vehicle-mounted device, which includes the vehicle-mounted AVNT2 and the vehicle-mounted T-Box 1; the vehicle-mounted AVNT2 is connected with the USB interface of the vehicle-mounted T-Box1 through the USB wire harness 23, and sends entertainment data to the vehicle-mounted T-Box1 through the USB wire harness 23 and the USB interface.
In a specific embodiment, as shown in fig. 4, the vehicle-mounted AVNT2 includes a second processor 21 and a second MCU22 connected to the second processor 21; the second MCU22 is used for acquiring vehicle body data of the entire vehicle CAN network and sending the vehicle body data to the second processor 21; the second processor 21 is connected with the USB interface of the vehicle-mounted T-Box1 through the USB wiring harness 23.
Specifically, the vehicle body data acquired by the second MCU22 is, for example, vehicle state information, and after the vehicle state information is acquired, the second processor 21 of the vehicle-mounted AVNT2 controls the display of the vehicle-mounted AVNT2 to display it, so as to prompt the driver.
As shown in fig. 5, another embodiment of the present invention provides a method for a vehicle-mounted device to access an external network, where the method is implemented based on the vehicle-mounted T-Box1, and the method includes:
step S1, the first processor 11 receives entertainment data of the vehicle-mounted AVNT2 through the USB interface, and sends the entertainment data to the network communication module 13 through the first data path, and the network communication module 13 sends the entertainment data to a preset third party through a public network;
s2, the first MCU12 acquires vehicle body data of the entire vehicle CAN network and sends the vehicle body data to the first processor 11; the first processor 11 receives the vehicle body data through the SPI interface, and sends the vehicle body data to the network communication module 13 through the second data path; and the network communication module 13 sends the car body data to the TSP background through the internet of vehicles.
In a specific embodiment, the method further comprises:
step S3, when the first processor 11 receives the first network control command of the on-board AVNT2 through the USB interface, the first processor 11 filters the first network control command.
In a specific embodiment, a control channel is further disposed between the first processor 11 and the network communication module 13;
the method further comprises the following steps:
step S4, the first MCU12 receives a second network control instruction of the whole vehicle CAN network and sends the second network control instruction to the first processor 11, the first processor 11 receives the second network control instruction through the SPI interface and sends the second network control instruction to the network communication module 13 through the control channel, and the network communication module 13 executes the second network control instruction after receiving the network control instruction.
In a specific embodiment, the method further comprises:
step S01, initializing the network communication module 13, a USB interface and an SPI interface, configuring 2 APNs for the network communication module 13 to form a first data path and a second data path, configuring a virtual network card and a virtual serial port for the USB interface, and providing a network data channel and a network management channel for the vehicle-mounted AVNT2, wherein the SPI interface is used for providing data communication for vehicle body data of the entire vehicle CAN network;
step S02, setting network parameters of the virtual network card, and establishing a data forwarding rule among the virtual network card, the network communication module 13 and the public network, so that the vehicle-mounted AVNT2 accesses an external network through the virtual network card;
step S03, starting the entertainment data service of the first processor 11, so that the first processor 11 receives the entertainment data of the vehicle-mounted AVNT2 through the USB interface and sends the entertainment data to the network communication module 13 through the first data path;
step S04, starting a vehicle body data service of the first processor 11, so that the first MCU12 obtains vehicle body data of the entire vehicle CAN network and sends the vehicle body data to the first processor 11; the first processor 11 receives the vehicle body data through the SPI interface and sends the vehicle body data to the network communication module 13 through a second data path;
step S05, starting the network management service of the first processor 11, so that the first processor 11 filters the first network control instruction and sends the second network control instruction to the network communication module 13;
and step S06, adding the virtual network card and the driver of the virtual serial port, so that the vehicle-mounted AVNT2 uses the data network and the network management service provided by the vehicle-mounted T-Box1 through the USB wire harness 23.
Specifically, after the steps S01-S06 are performed, the preparation of the onboard T-box is completed, and then the flow of the steps S1-S4 is performed. It should be noted that the steps are numbers, such as S03, S04, etc., which are only used to distinguish different step contents and do not constitute a limitation on the execution order of the steps, and it is understood that, when using the present embodiment, a person skilled in the art can appropriately adjust the order of the steps, and still achieve the purpose of the present embodiment.
It should be noted that the method of this embodiment corresponds to the vehicle-mounted T-box of the foregoing embodiment, and therefore, other contents not described in detail in the method of this embodiment can be obtained by referring to the contents of the vehicle-mounted T-box of the foregoing embodiment, which is not described herein again.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A vehicle-mounted T-Box is characterized by comprising a first processor, a first MCU and a network communication module; the first processor is provided with a USB interface and an SPI interface, the USB interface is used for being connected with the vehicle-mounted AVNT through a USB wire harness to receive entertainment data of the vehicle-mounted AVNT, the USB interface is provided with a virtual network card and a virtual serial port, the SPI interface is used for being in communication connection with the first MCU, and the first MCU is used for acquiring vehicle body data of a finished vehicle CAN network and sending the vehicle body data to the first processor; a first data path and a second data path are arranged between the first processor and the network communication module, the first processor is used for sending the entertainment data to the network communication module through the first data path and sending the vehicle body data to the network communication module through the second data path; the network communication module is used for sending the entertainment data to a preset third party through a public network and sending the vehicle body data to a TSP background through the internet of vehicles.
2. The in-vehicle T-Box of claim 1, wherein the first processor is further configured to filter the first network control directive when the USB interface receives the first network control directive from the in-vehicle AVNT.
3. The vehicle-mounted T-Box according to claim 1, wherein a control channel is further provided between the first processor and the network communication module; the first MCU is also used for receiving a second network control instruction of the whole vehicle CAN network and sending the second network control instruction to the first processor, the first processor is also used for sending the second network control instruction to the network communication module through the control channel, and the network communication module is also used for executing the second network control instruction after receiving the network control instruction.
4. The in-vehicle T-Box of claim 1, wherein the first processor is further configured with an SGMII interface, the SGMII interface is configured to connect to an external device through a network switch, and the network switch is configured to control connection or disconnection of the SGMII interface to the external device.
5. A system for accessing an external network by a vehicle-mounted device, comprising a vehicle-mounted AVNT and a vehicle-mounted T-Box according to any one of claims 1 to 4; the vehicle-mounted AVNT is connected with a USB interface of the vehicle-mounted T-Box through a USB wiring harness, and sends entertainment data to the vehicle-mounted T-Box through the USB wiring harness and the USB interface.
6. The system for accessing the external network by the vehicle-mounted device according to claim 5, wherein the vehicle-mounted AVNT comprises a second processor and a second MCU connected with the second processor; the second MCU is used for acquiring vehicle body data of the whole vehicle CAN network and sending the vehicle body data to the second processor; and the second processor is connected with the USB interface of the vehicle-mounted T-Box through the USB wiring harness.
7. A method for a vehicle-mounted device to access an external network, wherein the method is implemented based on the vehicle-mounted T-Box of claim 1, and the method comprises:
the first processor receives entertainment data of the vehicle-mounted AVNT through the USB interface, and sends the entertainment data to the network communication module through the first data path, and the network communication module sends the entertainment data to a preset third party through a public network;
the method comprises the steps that a first MCU acquires vehicle body data of a whole vehicle CAN network and sends the vehicle body data to a first processor; the first processor receives the vehicle body data through the SPI interface and sends the vehicle body data to the network communication module through a second data path; and the network communication module sends the vehicle body data to the TSP background through the Internet of vehicles.
8. The method for the vehicle-mounted device to access the external network according to claim 7, further comprising:
when the first processor receives a first network control instruction of the vehicle-mounted AVNT through the USB interface, the first processor filters the first network control instruction.
9. The method for accessing the external network by the vehicle-mounted equipment is characterized in that a control channel is further arranged between the first processor and the network communication module;
the method further comprises the following steps:
first MCU receives whole car CAN network's second network control command, and will second network control command sends to first treater, and first treater passes through the SPI interface and receives second network control command, and will second network control command passes through control channel sends to network communication module, and network communication module is receiving behind the network control command, the execution second network control command.
10. The method for the vehicle-mounted device to access the external network according to any one of claims 7 to 9, further comprising:
initializing a network communication module, a USB interface and an SPI interface, configuring 2 APNs for the network communication module to form a first data path and a second data path, and configuring a virtual network card and a virtual serial port for the USB interface;
setting network parameters of a virtual network card, and establishing a data forwarding rule among the virtual network card, a network communication module and a public network so that the vehicle-mounted AVNT accesses an external network through the virtual network card;
starting entertainment data service of the first processor, so that the first processor receives entertainment data of the vehicle-mounted AVNT through the USB interface and sends the entertainment data to the network communication module through the first data path;
starting a vehicle body data service of a first processor to enable a first MCU to acquire vehicle body data of a whole vehicle CAN network and send the vehicle body data to the first processor; the first processor receives the vehicle body data through the SPI interface and sends the vehicle body data to the network communication module through a second data path;
starting a network management service of the first processor to enable the first processor to filter the first network control instruction and send the second network control instruction to the network communication module;
and adding a driving program of the virtual network card and the virtual serial port, so that the vehicle-mounted AVNT uses a data network and network management service provided by the vehicle-mounted T-BOX through a USB wire harness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010469736.9A CN113746878A (en) | 2020-05-28 | 2020-05-28 | System and method for vehicle-mounted T-Box and vehicle-mounted equipment to access external network |
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