WO2019157943A1

WO2019157943A1 - Vehicle-mounted data transmission method and device, and vehicle-mounted telematics box

Info

Publication number: WO2019157943A1
Application number: PCT/CN2019/073426
Authority: WO
Inventors: 张震
Original assignee: 西安中兴新软件有限责任公司
Priority date: 2018-02-13
Filing date: 2019-01-28
Publication date: 2019-08-22
Also published as: CN110149614A; CN110149614B

Abstract

Provided are a vehicle-mounted data transmission method and device, and a vehicle-mounted Telematics BOX (TBOX). The method comprises the following steps: establishing two virtual data paths on a physical universal serial bus (USB) in which a first virtual network card and a second virtual network card are respectively enumerated; setting the first virtual network card in a first local area network, and setting the second virtual network card in a second local area network; configuring a policy routing to route data from the first virtual network card to a first packet data network, and to route data from the second virtual network card to a second packet data network; and carrying out data transmission according to the policy routing after receiving the data.

Description

Vehicle data transmission method and device, vehicle telematics processor

Technical field

The present disclosure relates to, but is not limited to, communication techniques.

Background technique

The development of the Internet of Vehicles brings various conveniences, but it may also lead to the possibility of the car being attacked and controlled remotely. For example, a car's internal network appears to be a relatively secure closed network, but there are many security vulnerabilities that can be exploited. Once exploited and exploited, these vulnerabilities can lead to privacy breaches or more serious problems.

Therefore, ensuring the safety of the Internet of Vehicles is of great significance.

Summary of the invention

The present disclosure provides an in-vehicle data transmission method, comprising the steps of: establishing two virtual data paths on a physical universal serial bus (USB), respectively enumerating the first virtual network card and the second virtual network a network card; the first virtual network card is disposed in the first local area network, and the second virtual network card is disposed in the second local area network; configured to route data coming in from the first virtual network card to the first packet data The network routes the data coming in from the second virtual network card to the policy route of the second packet data network; and after receiving the data, performs data transmission according to the policy route.

The present disclosure also provides a telematics telescope (T-BOX), comprising: an enumeration module configured to establish two virtual data paths on a physical USB, respectively enumerating the first virtual a network card and a second virtual network card; a setting module configured to set the first virtual network card in the first local area network, the second virtual network card in the second local area network; and a configuration module configured to perform configuration Routing data from the first virtual network card to a first packet data network, routing data coming in from the second virtual network card to a policy route of a second packet data network; and routing module configured to receive After the data, data transmission is performed according to the policy route.

The present disclosure also provides an in-vehicle telematics processor T-BOX, comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor implements the program The following steps: establishing two virtual data paths on one physical USB, respectively enumerating the first virtual network card and the second virtual network card; setting the first virtual network card in the first local area network, and the second virtual The network card is disposed in the second local area network; configured to route data coming in from the first virtual network card to the first packet data network, and route data from the second virtual network card to a policy route of the second packet data network; And receiving data according to the policy route for data transmission.

The present disclosure also provides an in-vehicle data transmission method, including: when detecting the insertion of the in-vehicle telematics processor T-BOX, enumerating the first virtual network card and the second virtual network card; and the first virtual network card and the The second virtual network card performs parameter configuration; and performs configuration to transmit data of the first virtual network card to the first packet data network, bind an application for controlling the vehicle to the second virtual network card, and The data of the second virtual network card is sent to the second packet data network.

The present disclosure further provides an in-vehicle data transmission device, comprising: an enumeration module configured to enumerate a first virtual network card and a second virtual network card when the insertion of the in-vehicle telematics processor T-BOX is detected; It is configured to perform parameter configuration on the first virtual network card and the second virtual network card; and a routing module configured to perform routing configuration to route data of the first virtual network card to the first packet data network, Binding an application that controls the vehicle to the second virtual network card, and routing data of the second virtual network card to the second packet data network.

The present disclosure also provides an in-vehicle data transmission apparatus, comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor executes the program to implement the following steps: detecting When the vehicle telematics processor T-BOX is inserted, the first virtual network card and the second virtual network card are enumerated; parameter configuration is performed on the first virtual network card and the second virtual network card; and configuration is performed to The data of the first virtual network card is sent to the first packet data network, the application for controlling the vehicle is bound to the second virtual network card, and the data of the second virtual network card is sent to the second packet data network.

The present disclosure also provides an Infotainment Head Unit (IHU) including the above apparatus.

DRAWINGS

1 is a schematic structural diagram of an in-vehicle data transmission system in some cases;

2 is a flowchart of an in-vehicle data transmission method on an in-vehicle T-BOX side according to an embodiment of the present disclosure;

3 is a flowchart of an in-vehicle data transmission method on the IHU side according to an embodiment of the present disclosure;

4 is a schematic structural diagram of an in-vehicle data transmission system according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of an in-vehicle T-BOX according to an embodiment of the present disclosure; FIG.

6 is a schematic diagram of an in-vehicle data transmission device according to an embodiment of the present disclosure;

7 is a flowchart of establishing two virtual paths on a vehicle T-BOX side according to an embodiment of the present disclosure;

FIG. 8 is a flowchart of data transmission by an IHU according to an embodiment of the present disclosure.

Detailed ways

The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The car networking system consists of four parts: the mainframe, the telematics processor (Teletons BOX, T-BOX), the mobile application (Application, APP) and the back-end system. The host is mainly used for video entertainment and vehicle information display. The vehicle T-BOX is mainly used for communicating with the background system/mobile APP, and realizes display and control of vehicle information through the mobile phone APP.

Specifically, after the user sends a control command through the mobile phone APP, the cloud service platform (CSP) background sends a monitoring request command to the vehicle T-BOX; after obtaining the control command, the vehicle passes the controller local area network (Controller) The Area Network (CAN) bus sends control messages and controls the vehicle, and feeds the operation results back to the user's mobile APP. This can help the user to remotely start the vehicle, open and/or lock the door, turn on the air conditioner, adjust the seat to the proper position, and so on.

FIG. 1 is a schematic diagram of the architecture of an in-vehicle data transmission system in some cases. As shown in the figure, the car T-BOX is connected to the IHU on the car via a USB cable, and a network card name is T-BOX inside the IHU. The IHU on the car has Wireless Fidelity (Wi-Fi). Hotspots, users use the network card T-BOX as a Wide Area Network (WAN) port to access the Internet via Wi-Fi. The application of the control vehicle inside the IHU also uses the network card T-BOX to interact with the CSP server. There are two data paths inside the vehicle T-BOX: one is a control path between the T-BOX and the CSP service for receiving and/or transmitting control commands, that is, a private packet data network (PDN) path; The other is the Internet data path for users connected via Wi-Fi via IHU, the public PDN path. Based on the destination address of the data packet, the T-BOX decides whether to send the data packet to the private channel or the public channel.

In some cases, the soft isolation of the public and private channels is implemented inside the T-BOX, but within the IHU, since the Wi-Fi hotspot and the IHU internal application share a WAN card T-BOX, the IHU internal application can listen to the network card T- The IP address of the BOX, therefore, the user of the Wi-Fi hotspot can access the IHU internal application (which is used to control the vehicle) by accessing the IP address of the network card T-BOX, so that the vehicle can be controlled without going through the CSP server. This is a security risk.

In this regard, embodiments of the present disclosure propose a transmission method in which two USB lines are established by software in two virtual paths, so that two paths can exist on one USB line and the two paths are softly isolated.

2 is a flowchart of an in-vehicle data transmission method on an in-vehicle T-BOX side according to an embodiment of the present disclosure. As shown in Figure 2, the method includes the following steps 11-14.

In step 11, two virtual data paths are established on one physical USB line, and the first virtual network card and the second virtual network card are respectively enumerated.

In step 12, the first virtual network card is set in the first local area network, and the second virtual network card is set in the second local area network.

At step 13, policy routing is configured to route data coming in from the first virtual network card to the first packet data network, and data coming in from the second virtual network card is routed to the second packet data network.

At step 14, data is transmitted according to the policy route after receiving the data.

FIG. 3 is a flowchart of an in-vehicle data transmission method on the IHU side according to an embodiment of the present disclosure. As shown in FIG. 3, the method includes the following steps 21-23.

In step 21, when it is detected that the in-vehicle telematics processor T-BOX is inserted, the first virtual network card and the second virtual network card are enumerated.

In step 22, parameter configuration is performed on the first virtual network card and the second virtual network card.

In step 23, configuration is performed to transmit data of the first virtual network card to the first packet data network, bind an application for controlling the vehicle to the second virtual network card, and configure the second virtual network card The data is sent to the second packet data network.

According to the method of the embodiment of the present disclosure, after the two virtual paths are established, for example, the usb0 network card (shown in FIG. 1) inside the T-BOX is enumerated into two network cards usb0.1 and usb0.2, and in the IHU. Internally, the WAN network port tbox is mapped to two WAN ports, tbox1 and tbox2. As shown in FIG. 4, the Wi-Fi user's Internet data passes through a WAN port, which is the virtual USB path of the tbox1, and the data that the IHU internal application interacts with the CSP server passes through another WAN port, which is the virtual USB path of the tbox2. As a result, the data that Wi-Fi users use to access the IP on the tbox1 NIC will not reach the IHU internal application.

The NICs usb0.1 and usb0.2 inside the T-BOX corresponding to the tbox1 and tbox2 NICs cannot be in the same LAN, because if so, Wi-Fi users can also access the IP of the tbox2 NIC to access the IHU internal application. Therefore, two bridges bridge0 and bridge1 can be established inside the T-BOX, and two gateways bridge0 and bridge1 are respectively configured with different gateway IPs to establish two local area networks, wherein usb0.1 is hung in the bridge bridge0. , usb0.2 is hung in bridge bridge1. Thereby, the public path and the private path can be completely separated, and the safety performance of the T-BOX product can be improved.

In an embodiment, the foregoing step 11 may include the following steps: configuring, by the two virtual data paths, port combination information driven by a plurality of network card character devices, where the port combination information driven by the plurality of network card character devices includes Information of the virtual network card and the second virtual network card; and registering the multi-NIC character device, performing resource binding according to the registration information of the multi-NIC character device and the port combination information, and enumerating the first virtual The network card and the second virtual network card, wherein the first virtual network card and the second virtual network card respectively correspond to the two virtual data paths.

In an embodiment, the foregoing step 12 may include the steps of: establishing a first bridge and a second bridge; configuring a first gateway IP address for the first bridge, and configuring a second gateway for the second bridge The IP address, the first gateway IP address and the second gateway IP address are respectively gateway IP addresses corresponding to the first local area network and the second local area network; and the first virtual network card is hung in the office Under the first bridge, the second virtual network card is hung under the second bridge.

In an embodiment, after the step 12, the method may include the following steps: allocating a first address pool to the first local area network, listening to the first bridge, and assigning an IP address from the first address pool to And the second virtual network card is allocated to the second local area network, and the second network bridge is monitored, and an IP address is allocated from the second address pool to the second virtual network card. The first address pool is different from the second address pool.

In an embodiment, the foregoing step 14 may include the following steps: after receiving the data, the virtual network card according to the data applies a corresponding label to the data; and the data is routed according to the policy and the label. Route.

In an embodiment, the step 22 may include the following steps: after detecting that the network port status of the first virtual network card and the second virtual network card is in an open state, respectively, by using the first virtual network card and the first The second virtual network card applies for an IP address to the in-vehicle T-BOX, and configures the applied IP address to the first virtual network card and the second virtual network card respectively. In an embodiment, the step of applying for an IP address to the in-vehicle T-BOX by using the first virtual network card and the second virtual network card respectively includes the following steps: respectively adopting the first virtual network card and the The second virtual network card sends a dynamic host setup protocol DHCP discovery message to the in-vehicle T-BOX to apply for an IP address to the in-vehicle T-BOX.

FIG. 5 is a schematic diagram of an in-vehicle T-BOX according to an embodiment of the present disclosure. As shown in FIG. 5, the in-vehicle T-BOX of the embodiment of the present disclosure includes an enumeration module 501, a setting module 502, a configuration module 503, and a routing module 504.

The enumeration module 501 is configured to establish two virtual data paths on one physical USB line, and enumerate the first virtual network card and the second virtual network card respectively.

The setting module 502 is configured to set the first virtual network card in a first local area network, and set the second virtual network card in a second local area network.

The configuration module 503 is configured to be configured to route data coming in from the first virtual network card to a first packet data network, and route data from the second virtual network card to a policy route of a second packet data network .

The routing module 504 is configured to perform data transmission according to the policy route after receiving data.

In an embodiment, the enumeration module 501 is configured to establish two virtual data paths on one physical USB line by enumerating the first virtual network card and the second virtual network card respectively: The data path configures port combination information driven by the multi-NIC character device, the port combination information driven by the multi-NIC character device includes information about the first virtual network card and the second virtual network card; and registering the multi-network card character device And performing resource binding according to the registration information of the multi-NIC character device and the port combination information, and enumerating the first virtual network card and the second virtual network card, where the first virtual network card and the second The virtual network cards respectively correspond to the two virtual data paths.

In an embodiment, the setting module 502 is configured to: set the first virtual network card in a first local area network, and set the second virtual network card in a second local area network by: establishing a first bridge And a second bridge; configuring a first gateway IP address for the first bridge, and configuring a second gateway IP address for the second bridge, where the first gateway IP address and the second gateway IP address are respectively a gateway IP address corresponding to the first local area network and the second local area network; and hanging the first virtual network card under the first bridge, and hanging the second virtual network card in the first Under the second bridge.

In an embodiment, the setting module 502 is further configured to: allocate a first address pool to the first local area network, listen to the first bridge, and take an IP address from the first address pool. Allocating to the first virtual network card; and allocating a second address pool to the second local area network, listening to the second bridge, and assigning an IP address from the second address pool to the second virtual network card The first address pool is different from the second address pool.

In an embodiment, the routing module 504 is configured to perform routing according to the policy route after receiving data: after receiving the data, the virtual network card according to the data is marked with a corresponding label; The policy route and the tag route the data.

An embodiment of the present disclosure further provides an in-vehicle T-BOX, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the following steps: Establishing two virtual data paths on one physical USB line, respectively enumerating the first virtual network card and the second virtual network card; setting the first virtual network card in the first local area network, and setting the second virtual network card In the second local area network; configuring to route data coming in from the first virtual network card to the first packet data network, and routing data coming in from the second virtual network card to a policy route of the second packet data network; And receiving data according to the policy route for data transmission.

FIG. 6 is a schematic diagram of an in-vehicle data transmission device according to an embodiment of the present disclosure. As shown in FIG. 6, the apparatus of the embodiment of the present disclosure includes: an enumeration module 601, a configuration module 602, and a routing module 603.

The enumeration module 601 is configured to enumerate the first virtual network card and the second virtual network card when detecting the insertion of the in-vehicle telematics processor T-BOX.

The configuration module 602 is configured to perform parameter configuration on the first virtual network card and the second virtual network card.

The routing module 603 is configured to perform routing configuration to route data of the first virtual network card to the first packet data network, bind an application for controlling the vehicle to the second virtual network card, and The data of the second virtual network card is routed to the second packet data network.

In an embodiment, the parameter includes at least one of the following: a maximum transmission unit, an IP address, a closed state, or an open state of the network ports of the first virtual network card and the second virtual network card, name. In an embodiment, the first virtual network card and the second virtual network card respectively correspond to two virtual network cards in the in-vehicle T-BOX. In some embodiments, the term "network port" may be used interchangeably with "network card". In other embodiments, the term "network port" may refer to a network port, one end of a network path.

In an embodiment, the configuration module 602 is configured to perform parameter configuration on the first virtual network card and the second virtual network card according to the following operations: detecting the first virtual network card and the second virtual network card After the network port state is the open state, the first virtual network card and the second virtual network card respectively apply for an IP address to the in-vehicle T-BOX, and the applied IP addresses are respectively configured to the first virtual network card. And the second virtual network card.

An embodiment of the present disclosure further provides an in-vehicle data transmission apparatus, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the following steps: When detecting the insertion of the in-vehicle telematics processor T-BOX, enumerating the first virtual network card and the second virtual network card; performing parameter configuration on the first virtual network card and the second virtual network card; and configuring to The data of the first virtual network card is sent to the first packet data network, the application for controlling the vehicle is bound to the second virtual network card, and the data of the second virtual network card is sent to the second packet data network.

Embodiments of the present disclosure also provide an IHU that includes the above-described in-vehicle data transmission device.

In another embodiment, an onboard data transmission system is further provided, wherein the functional module on the IHU side may include: a Dynamic Host Configuration Protocol (DHCP) client module, a router module, and a network card driver. The module of the T-BOX side may include: a DHCP server module, a routing module, and a virtual USB (Virtual USB, VUSB) module. The combination of the NIC driver module and the DHCP client module is equivalent to the combination of the enumeration module 601 and the configuration module 602 above. The combination of the VUSB module and the DHCP server module is equivalent to the combination of the enumeration module 501, the setting module 502, and the configuration module 503 above.

In the in-vehicle data transmission system, the USB cable between the T-BOX and the IHU is only a physical path, and there is no need to change it; two virtual paths are established on the one USB line, and the routing module will Different data is routed into the corresponding path.

In the IHU device, the network card driving module configures two virtual path mapping network card tbox1 and tbox2 parameters for the internal VUSB module of the T-BOX, such as a maximum transmission unit of the network port of the network card (Maximum Transmission Unit) , MTU), IP address, Down, and/or UP status, name, etc.; after detecting that the tbox1 and tbox2 NIC status is UP, the DHCP client module sends DHCP Discovery through the tbox1 and tbox2 NICs respectively. (Discover) the message, request the IP address from the T-BOX, and then configure the applied IP addresses IP1 and IP2 to tbox1 and tbox2 respectively; the routing module performs the routing function and configures a path from tbox1 to the public PDN. The application that interacts with the CSP inside the IHU is bound to the tbox2 NIC to be sent from the private network path.

In the T-BOX device, the VUSB module enumerates two virtual network cards usb0.1 and usb0.2 in one USB cable to establish two virtual data links; the DHCP server module is in T - BOX internally opens two DHCP server functions, respectively configuring the address pool and the gateway, so that the two gateways are in different local area networks (bridges bridge0 and bridge1 are respectively in the different local area networks), and the two DHCP servers respectively monitor the network. Bridges bridge0 and bridge1, respectively, configure the IP addresses of different LANs for the devices on bridge0 and bridge1; the routing module is mainly responsible for performing routing functions, routing data coming in from usb0.1 to the public network PDN path, coming in from usb0.2 The data is routed to the private network PDN path. The routing module needs to use the policy routing function, and the data sent via usb0.1 and usb0.2 are respectively tagged by iptables, and the routing module separately sends the data with different labels. Go to the public network PDN path or the private network PDN path.

In the embodiment of the present disclosure, the on-board T-BOX side implements the creation of two virtual paths at the VUSB module, and the path from the Wi-Fi user to the network (internet) and the path from the IHU internal application to the CSP server are two. The non-interfering paths of the intersections ensure the security of the data used to control the vehicle through the CSP server, and prevent the IHU's Wi-Fi hotspot from being cracked, and then control the vehicle through Wi-Fi.

In the VUSB module, the configuration of the multi-NIC character device is mainly performed at the kernel layer. The detailed process of establishing two virtual paths is as shown in FIG. 7, and includes the following steps 101-108.

In step 101, the port combination information of the multi-NIC character device driver is configured in the kernel driver, and the kernel driver starts to parse according to the port combination information. If the port combination information is found to be a multi-NIC character device driver, it is determined whether there is any in the kernel. Register the information of the multi-NIC character device with yourself.

The port combination information driven by the multi-NIC character device may include: a network card name (for example, usb0.1 and usb0.2), and a network card type.

At step 102, a multi-NIC character device is registered.

Add the registration of the multi-NIC character device in the kernel driver layer. In one example, the addition can only be done by registering with the other character devices of the kernel.

In step 103, when the kernel driver detects the registration information of the multi-NIC character device, the resource binding operation is performed, and the information of the data path and the control path of the character device is filled and reported to the host.

In step 104, after the resources are bound, the character device driver sets some operation functions according to the multi-NIC character device driver port combination information, such as reading and writing and opening the path of the character device.

When this information is configured, you need to customize the character name that the character device needs to call at the application layer. Once the character name is determined, both the network layer and the physical layer can configure the NIC driver.

After the virtual path is established successfully, two NICs usb0.1 and usb0.2 will appear inside the T-BOX, and then the two NICs need to be added to different LANs.

In step 105, two bridges bridge0 and bridge1 are established in the T-BOX by the command 'brctl addbr bridge0', 'brctl addbr bridge1', and through ifconfig (used in linux for displaying or configuring network devices (network interface cards) Command) Configure different gateway IP addresses for the two bridges.

In step 106, the brctl addif command is used to hang the usb0.1 and usb0.2 NICs under bridge0 and bridge bridges respectively, so that tbox1 and tbox2 mapped by usb0.1 and usb0.2 are inside different LANs.

In step 107, two DHCP server processes are started at the same time, and different address pools are respectively configured to monitor bridge0 and bridge1 respectively, and assign IP addresses to the tbox1 and tbox2 network cards.

In step 108, the policy routing is configured, the iptables rule is added, the data coming in from the usb0.1 network card is tagged 1, and the data coming in from the usb0.2 network card is tagged 2. Policy routing is added such that data with tag 1 is sent from the public PDN to the network, and data with tag 2 is sent from the private PDN to the network.

After the above steps are completed, two completely isolated paths have been established inside the T-BOX.

The following is a brief introduction to the internal implementation process of IHU. As shown in FIG. 8, the flow includes the following steps 201-203.

In step 201, the network card driver automatically enumerates the tbox1 and tbox2 network cards when detecting that the T-BOX is inserted into the IHU, and the network card driver notifies the upper application that the USB cable is inserted.

In step 202, after receiving the USB cable insertion event, the upper application starts two DHCP client processes respectively, starts a DHCP process from the tbox1 and tbox2 network cards, obtains an IP address, and configures the IP addresses to the network cards tbox1 and tbox2, respectively.

In step 203, the default route is configured to configure the default route from tbox1WAN.

The NIC goes out and sends via the public network PDN path. The IHU internal application (for example, for controlling the vehicle) is bound to the tbox2 NIC and sent through the path to the private network PDN.

Embodiments of the present disclosure also provide a computer readable storage medium storing computer executable instructions that, when executed, implement the onboard data transmission method.

One of ordinary skill in the art will appreciate that all or a portion of the steps described above can be accomplished by a program that instructs the associated hardware, such as a read-only memory, a magnetic or optical disk, and the like. All or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware or in the form of a software function module. The present disclosure is not limited to any specific form of combination of hardware and software.

The above are merely exemplary embodiments of the present disclosure, and the present disclosure may have other various embodiments. A person skilled in the art can make various corresponding changes and modifications in accordance with the present disclosure without departing from the spirit of the disclosure, and the corresponding changes and modifications should fall within the scope of the appended claims. protected range.

Claims

An in-vehicle data transmission method includes the following steps:

Establishing two virtual data paths on a physical universal serial bus USB, respectively enumerating the first virtual network card and the second virtual network card;

Setting the first virtual network card in the first local area network, and setting the second virtual network card in the second local area network;

Configuring policy routing to route data coming in from the first virtual network card to a first packet data network, routing data coming in from the second virtual network card to a second packet data network;

After receiving the data, the data is transmitted according to the policy route.
The method of claim 1, wherein the step of establishing two virtual data paths on one physical USB and enumerating the first virtual network card and the second virtual network card respectively comprises the following steps:

Port combination information driven by the plurality of network card character devices is configured on the two virtual data paths, and the port combination information driven by the multi-NIC character device includes information about the first virtual network card and the second virtual network card;

Registering the multi-NIC character device, performing resource binding according to the registration information of the multi-NIC character device and the port combination information, and enumerating the first virtual network card and the second virtual network card,

The first virtual network card and the second virtual network card respectively correspond to the two virtual data paths.
The method of claim 1, wherein the step of setting the first virtual network card in a first local area network and the second virtual network card in a second local area network comprises the steps of:

Establishing a first bridge and a second bridge;

Configuring a first gateway IP address for the first bridge, and configuring a second gateway IP address for the second bridge, where the first gateway IP address and the second gateway IP address are respectively the first a gateway IP address corresponding to the local area network and the second local area network;

Hanging the first virtual network card under the first bridge and hanging the second virtual network card under the second bridge.
The method of claim 3, wherein after the step of setting the first virtual network card in the first local area network and the second virtual network card in the second local area network, the method further comprises the following steps:

Allocating a first address pool to the first local area network, listening to the first bridge, and assigning an IP address from the first address pool to the first virtual network card;

Allocating a second address pool to the second local area network, listening to the second network bridge, and assigning an IP address from the second address pool to the second virtual network card, where the first address pool is The second address pool is different.
The method according to any one of claims 1 to 4, wherein the step of routing according to the policy route after receiving the data comprises the following steps:

After receiving the data, the virtual network card that comes in according to the data marks the data with a corresponding label;

The data is routed according to the policy route and the tag.
A vehicle telematics processor T-BOX, comprising:

An enumeration module configured to establish two virtual data paths on a physical universal serial bus USB, and enumerate the first virtual network card and the second virtual network card respectively;

a setting module, configured to set the first virtual network card in a first local area network, and set the second virtual network card in a second local area network;

a configuration module configured to be configured to route data coming in from the first virtual network card to a first packet data network, and to route data coming in from the second virtual network card to a policy route of a second packet data network; as well as

The routing module is configured to perform data transmission according to the policy route after receiving the data.
The in-vehicle T-BOX according to claim 6, wherein the enumeration module is configured to establish two virtual data paths on one physical USB by the following steps, respectively enumerating the first virtual network card and the second virtual Network card:

Port combination information driven by the plurality of network card character devices is configured on the two virtual data paths, and the port combination information driven by the multi-NIC character device includes information about the first virtual network card and the second virtual network card;

Registering the multi-NIC character device, performing resource binding according to the registration information of the multi-NIC character device and the port combination information, and enumerating the first virtual network card and the second virtual network card,

The first virtual network card and the second virtual network card respectively correspond to the two virtual data paths.
The in-vehicle T-BOX according to claim 6, wherein the setting module is configured to set the first virtual network card in a first local area network and the second virtual network card in a second local area network by the following steps in:

Establishing a first bridge and a second bridge; configuring a first gateway IP address for the first bridge, and configuring a second gateway IP address for the second bridge, the first gateway IP address and the first The second gateway IP address is a gateway IP address corresponding to the first local area network and the second local area network, respectively;

Hanging the first virtual network card under the first bridge and hanging the second virtual network card under the second bridge.
The in-vehicle T-BOX of claim 8, wherein the setting module is further configured to:

Allocating a first address pool to the first local area network, listening to the first bridge, and assigning an IP address from the first address pool to the first virtual network card;

Allocating a second address pool to the second local area network, listening to the second network bridge, and assigning an IP address from the second address pool to the second virtual network card, where the first address pool is The second address pool is different.
The in-vehicle T-BOX according to any one of claims 6-9, wherein the routing module is configured to route according to the policy route after receiving data by:

After receiving the data, the virtual network card that comes in according to the data marks the data with a corresponding label;

The data is routed according to the policy route and the tag.
An in-vehicle telematics processor T-BOX includes: a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor performs the following steps when executing the program:

Establishing two virtual data paths on a physical universal serial bus USB, respectively enumerating the first virtual network card and the second virtual network card;

Setting the first virtual network card in the first local area network, and setting the second virtual network card in the second local area network;

Configuring policy routing to route data coming in from the first virtual network card to a first packet data network, routing data coming in from the second virtual network card to a second packet data network;

After receiving the data, the data is transmitted according to the policy route.
An in-vehicle data transmission method includes the following steps:

When detecting the insertion of the in-vehicle telematics processor T-BOX, enumerating the first virtual network card and the second virtual network card;

Parameterizing the first virtual network card and the second virtual network card; and

Configuring to transmit data of the first virtual network card to the first packet data network, bind an application for controlling the vehicle to the second virtual network card, and send data of the second virtual network card to the first Two packet data networks.
The method of claim 12, wherein the parameter comprises at least one of the following:

a maximum transmission unit, an IP address, a closed state, an open state, and a name of the network ports of the first virtual network card and the second virtual network card,

And wherein the first virtual network card and the second virtual network card respectively correspond to two virtual network cards in the in-vehicle T-BOX.
The method of claim 13, wherein the step of parameter configuring the first virtual network card and the second virtual network card comprises the steps of:

After detecting that the network port status of the first virtual network card and the second virtual network card is in an open state, apply for an IP address to the in-vehicle T-BOX through the first virtual network card and the second virtual network card, respectively. The applied IP addresses are respectively configured to the first virtual network card and the second virtual network card.
The method of claim 14, wherein the step of requesting an IP address from the first virtual network card and the second virtual network card to the in-vehicle T-BOX comprises the following steps:

And sending, by the first virtual network card and the second virtual network card, a dynamic host setting protocol DHCP discovery message to the in-vehicle T-BOX to apply for an IP address to the in-vehicle T-BOX.
An in-vehicle data transmission device comprising:

An enumeration module configured to enumerate the first virtual network card and the second virtual network card when detecting the insertion of the in-vehicle telematics processor T-BOX;

a configuration module, configured to perform parameter configuration on the first virtual network card and the second virtual network card;

a routing module configured to perform routing configuration to route data of the first virtual network card to the first packet data network, bind an application for controlling the vehicle to the second virtual network card, and bind the second The data of the virtual network card is routed to the second packet data network.
The apparatus of claim 16 wherein said parameter comprises at least one of the following:

a maximum transmission unit, an IP address, a closed state, an open state, and a name of the network ports of the first virtual network card and the second virtual network card,

And wherein the first virtual network card and the second virtual network card respectively correspond to two virtual network cards in the in-vehicle T-BOX.
The apparatus of claim 17, wherein the configuration module is configured to parameterize the first virtual network card and the second virtual network card by the following steps:

After detecting that the network port status of the first virtual network card and the second virtual network card is in an open state, apply for an IP address to the in-vehicle T-BOX through the first virtual network card and the second virtual network card, respectively. The applied IP addresses are respectively configured to the first virtual network card and the second virtual network card.
An in-vehicle data transmission apparatus includes: a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the processor executes the program to implement the following steps:

When detecting the insertion of the in-vehicle telematics processor T-BOX, enumerating the first virtual network card and the second virtual network card;

Parameterizing the first virtual network card and the second virtual network card; and

Configuring to transmit data of the first virtual network card to the first packet data network, bind an application for controlling the vehicle to the second virtual network card, and send data of the second virtual network card to the first Two packet data networks.
An infotainment host IHU comprising the apparatus of any of claims 16-19.