Vehicle-mounted system integrated with in-vehicle ETC module and its communication method

Abstract

An in-vehicle head unit system integrated with an in-vehicle ETC module and its communication method. The head unit system includes a head unit main module and an ETC module. The head unit main module interacts with users inside the vehicle and communicates with external network devices outside the vehicle. The ETC module is connected to the head unit main module and is wirelessly connected to the in-vehicle ETC device to communicate with the in-vehicle ETC device. Thus, through the ETC module directly connected to the head unit main module, information communication between the head unit main module and the in-vehicle ETC device is achieved. And since the head unit main module can communicate with external network devices, information communication among the head unit system, the in-vehicle ETC device, and the external network device is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of communication and interaction between ETC devices and in-vehicle infotainment systems, and particularly relates to an in-vehicle infotainment system integrated with an on-vehicle ETC module and its communication method. Background Art

[0002] ETC (Electronic Toll Collection), whose Chinese name is Electronic Toll Collection System, its main business scenario is for automatic toll collection on highways or bridges. Through dedicated short-range communication between the on-vehicle electronic tag installed on the vehicle windshield and the microwave antenna on the ETC lane at the toll station, and using computer networking technology for back-end settlement processing with banks, so as to achieve the purpose that vehicles can pass through highway or bridge toll stations without stopping and can pay highway or bridge tolls.

[0003] ETC highway tolls are related to the core interests of vehicle owners. If the highway / bridge tolls can be displayed on the in-vehicle infotainment screen, it provides an extremely convenient way for vehicle owners to understand their vehicle passing information (toll road passing mileage, toll road passing route, toll road passing fees, etc.). These vehicle passing information can provide important reference data for vehicle owners' travel planning, vehicle passing financial budget, and vehicle anti-theft tracking.

[0004] In addition, the ETC payment scenario is constantly expanding. The connection between the payment service of the in-vehicle infotainment system and ETC is also an important business layout of the intelligent vehicle cockpit. With the increasingly powerful vehicle networking function and the increasingly rich multimedia in-vehicle infotainment functions at the vehicle central control end, functions such as online paid music, online paid video, online paid movies and TV series, online paid novels, online paid games and equipment, and online vehicle shopping will surely become important directions for the next generation of vehicle-end multimedia value-added services. These services must be supported by a payment mechanism and payment channels. Without a portable payment interface and payment channels, it will seriously affect the user experience. Summary of the Invention

[0005] The present invention provides an in-vehicle infotainment system integrated with an on-vehicle ETC module, realizing information communication among the in-vehicle infotainment system, the on-vehicle ETC device, and the off-vehicle network device.

[0006] According to a first aspect, in one embodiment, an in-vehicle infotainment system integrated with an on-vehicle ETC module is provided for realizing information communication between the on-vehicle ETC device and the in-vehicle infotainment system, including:

[0007] An in-vehicle infotainment main body module, configured to perform information interaction with users inside the vehicle and information communication with off-vehicle network devices;

[0008] ETC module, the ETC module is electrically connected to the in-vehicle head unit module, the ETC module is wirelessly connected to the on-vehicle ETC device, and the ETC module is used for information communication with the on-vehicle ETC device.

[0009] In one embodiment, the ETC module includes:

[0010] A radio frequency antenna, the radio frequency antenna points to the on-vehicle ETC device, and the radio frequency antenna is used for sending information to the on-vehicle ETC device and receiving information sent by the on-vehicle ETC device;

[0011] Wherein, the gain of the radio frequency antenna satisfies that the range of sending and receiving information is less than or equal to the vehicle body space.

[0012] In one embodiment, the gain of the radio frequency antenna satisfies that the distance of sending and receiving information is the distance from the ETC module to the on-vehicle ETC device.

[0013] In one embodiment, the in-vehicle head unit module includes a first interface, and the ETC module includes a second interface;

[0014] The first interface and the second interface are connected by a communication cable.

[0015] In one embodiment, the first interface and the second interface are UART serial interfaces.

[0016] In one embodiment, the in-vehicle head unit module is used for information communication with external vehicle network devices and in-vehicle devices, including:

[0017] Receiving a commodity transaction request, the commodity transaction request includes commodity information of the commodity to be traded;

[0018] Sending the commodity transaction request to the corresponding commodity transaction server;

[0019] Receiving payment information sent by the commodity transaction server and displaying the payment information;

[0020] After receiving a request for confirming payment, obtaining vehicle information, generating corresponding order information according to the vehicle information and the payment information, and sending the order information to the ETC module;

[0021] The ETC module is used for information communication with the on-vehicle ETC device, including:

[0022] Sending the order information sent by the in-vehicle head unit module to the on-vehicle ETC device, and the on-vehicle ETC device caches the order information in the internal memory and then sends a cache success response to the in-vehicle head unit module, so that the in-vehicle head unit module is in a paid cache success state;

[0023] Among them, when the vehicle-mounted ETC device enters the ETC toll station of the highway, it makes a payment according to the order information.

[0024] In one embodiment, the vehicle head unit main module is used for information communication with external vehicle network devices and in-vehicle devices, including:

[0025] Receiving a request for obtaining vehicle passing information;

[0026] Sending the request for obtaining vehicle passing information to the ETC module;

[0027] The ETC module is used for information communication with the vehicle-mounted ETC device, including:

[0028] Sending the request for obtaining vehicle passing information sent by the vehicle head unit main module to the vehicle-mounted ETC device, and the vehicle-mounted ETC device reads the corresponding vehicle passing information from the internal memory according to the request for obtaining vehicle passing information, and sends the vehicle passing information to the vehicle head unit main module through the ETC module.

[0029] In one embodiment, it further includes:

[0030] A human-machine interaction module, which is used for displaying information and receiving user requests;

[0031] Among them, the information includes at least one of payment information, commodity information, order information, and vehicle passing information, and the user request includes a commodity transaction request or a vehicle passing information request.

[0032] According to a second aspect, in one embodiment, a communication method of a vehicle head unit system integrated with an ETC module is provided, wherein the vehicle head unit system includes: a vehicle head unit main module and an ETC module;

[0033] The vehicle head unit main module receives a commodity transaction request, and the commodity transaction request includes the commodity information of the commodity to be traded;

[0034] The vehicle head unit main module sends the commodity transaction request to the corresponding commodity transaction server;

[0035] The vehicle head unit main module receives the payment information sent by the commodity transaction server and displays the payment information;

[0036] After receiving the request for confirming payment, the vehicle head unit main module obtains vehicle information, generates corresponding order information according to the vehicle information and the payment information, and sends the order information to the ETC module;

[0037] The ETC module sends the order information sent by the in-vehicle head unit main module to the on-vehicle ETC device. After caching the order information in the internal memory, the on-vehicle ETC device sends a caching success response to the in-vehicle head unit main module, so that the in-vehicle head unit main module is in the paid caching success state;

[0038] Wherein, when the vehicle enters the highway ETC toll station, the on-vehicle ETC device makes a payment according to the order information.

[0039] According to a third aspect, in an embodiment, a communication method of a vehicle head unit system integrated with an on-vehicle ETC module is provided. Wherein, the vehicle head unit system includes: an in-vehicle head unit main module and an ETC module;

[0040] The in-vehicle head unit main module receives a request for obtaining vehicle passing information;

[0041] The in-vehicle head unit main module sends the request for obtaining vehicle passing information to the ETC module;

[0042] The ETC module sends the request for obtaining vehicle passing information sent by the in-vehicle head unit main module to the on-vehicle ETC device. The on-vehicle ETC device reads the corresponding vehicle passing information from the internal memory according to the request for obtaining vehicle passing information, and sends the vehicle passing information to the in-vehicle head unit main module through the ETC module.

[0043] According to the in-vehicle head unit system integrated with the on-vehicle ETC module in the above embodiment, it includes an in-vehicle head unit main module and an ETC module. The in-vehicle head unit main module interacts with the user inside the vehicle and communicates with the external network device outside the vehicle. The ETC module is connected to the in-vehicle head unit main module, and the ETC module is wirelessly connected to the on-vehicle ETC device, and the ETC module communicates with the on-vehicle ETC device; Thus, through the ETC module directly connected to the in-vehicle head unit main module, the information communication between the in-vehicle head unit main module and the on-vehicle ETC device is realized, and since the in-vehicle head unit main module can communicate with the external network device outside the vehicle, the information communication between the vehicle head unit system, the on-vehicle ETC device and the external network device is realized.

[0044] In addition, when the external network device is a commodity trading server, the user's commodity trading request is sent to the commodity trading server through the in-vehicle head unit main module. The commodity trading server sends the order information to the on-vehicle ETC device through the ETC module. When the vehicle enters the highway ETC toll station, the on-vehicle ETC device makes a payment according to the order information, so that the user does not need to make a payment manually inside the vehicle, improving the user experience in the ETC payment scenario.

[0045] Again, the in-vehicle unit main body module can also obtain vehicle passing information from the on-vehicle ETC device through the ETC module and display the vehicle passing information, enabling the user to timely understand various passing information of the vehicle and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 FIG. is a schematic structural diagram of an in-vehicle system integrated with an on-vehicle ETC module according to an embodiment;

[0047] Figure 2 is Figure 1 a schematic connection diagram of the in-vehicle unit main body module and the ETC module in the shown in-vehicle system;

[0048] Figure 3 FIG. is a flowchart of a communication method of an in-vehicle system integrated with an on-vehicle ETC module according to an embodiment;

[0049] Figure 4 FIG. is a flowchart of a communication method of an in-vehicle system integrated with an on-vehicle ETC module according to another embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] The present invention will be further described in detail below in conjunction with the accompanying drawings through specific embodiments. Similar elements in different embodiments are labeled with related similar element numbers. In the following embodiments, many detailed descriptions are provided to enable a better understanding of the present application. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification to avoid the core part of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the descriptions in the specification and the general technical knowledge in the art.

[0051] In addition, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in an obvious manner by those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean a necessary sequence, unless it is stated that a certain sequence must be followed.

[0052] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0053] The car computer system refers to the abbreviation of the in-vehicle infotainment product installed in the car, which can realize information communication between people and cars, and between cars and the outside world.

[0054] A car's traffic information includes important traffic information such as toll road mileage, toll road routes, and toll road tolls. Users cannot view this information through the vehicle system. They need to use mobile phones, computers and other Internet devices to log in to different network platforms to view this information. The viewing process is very complicated.

[0055] In an embodiment of the present invention, the above-mentioned vehicle traffic information is obtained through the vehicle system and directly displayed in the vehicle for users to view, providing important reference data for users' travel planning, vehicle traffic financial budgeting, and vehicle anti-theft tracking.

[0056] The existing car system can communicate with the operator servers of various entertainment products in the outside world through the in-vehicle communication equipment in the vehicle, so that users can watch various entertainment products in the vehicle, such as online music, online video, online novels, online games, etc. Since many entertainment products on the Internet now require payment before they can be watched, online car shopping will become the entrance to the value-added multimedia entertainment business of the car. With the help of Internet of Vehicles technology and feature-rich multimedia car technology, automobile manufacturers, car manufacturers, and online Internet multimedia entertainment business operators in the automobile and automotive electronics and automotive Internet industries will work together to leverage the consumption of value-added Internet entertainment services on the car side and make it an important future car-side business scenario. If there is a consumption scenario, there must be a payment mechanism and payment channel to provide support. If there is no portable payment interface and payment channel, it will seriously affect the user experience, especially if there is no excellent user experience, it will greatly reduce the user's consumption motivation and enthusiasm for purchasing multimedia value-added entertainment services such as audio, video, text and games in the car. Excellent user experience means that the operation must be simple and easy to understand for the user, and the prompts must be concise and clear. Specifically, it is best to be a fool-proof operation and reach the level of non-sensing payment. For developers, excellent user experience means creating and designing an extremely portable and simple in-car payment scenario that does not require the intervention of mobile phones and mobile payment applications.

[0057] In an embodiment of the present invention, when the user confirms the purchase intention and reaches a payment transaction, the order information will be temporarily cached in the ETC vehicle-mounted terminal. When the car passes through any road or bridge with an ETC toll station, the fee bill cached in the ETC vehicle-mounted terminal will be automatically settled through the toll station. After the settlement is successful, the highway operating unit will transfer the fee to the third-party Internet multimedia entertainment value-added service operator through a certain settlement mechanism.

[0058] Please refer to Figure 1 ,Figure 1 The following is a schematic structural diagram of a vehicle-mounted ETC module integrated vehicle head unit system, hereinafter referred to as the vehicle head unit system. The vehicle head unit system includes: a human-computer interaction module 11, a vehicle head unit main body module 12, and an ETC module 13.

[0059] The human-computer interaction module 11 is used to display information and receive requests from users inside the vehicle. In this embodiment, the human-computer interaction module 11 can be a touch screen inside the vehicle, or other interaction devices such as a keyboard and a mouse.

[0060] The vehicle head unit main body module 12 is used to interact with users inside the vehicle and communicate with external network devices.

[0061] In this embodiment, the vehicle head unit main body module 12 is any existing vehicle head unit. It can be a mid- to high-end vehicle head unit with Internet functions, or a low-end vehicle head unit without Internet functions. And the vehicle head unit main body module is already a mature hardware module, which will not be elaborated in this embodiment.

[0062] The ETC module 13 is electrically connected to the vehicle head unit main body module 12, and the ETC module 13 is wirelessly connected to the vehicle-mounted ETC device. The ETC module 13 is used to communicate with the vehicle-mounted ETC device.

[0063] Among them, the vehicle head unit main body module 12 includes a first interface, and the ETC module 13 includes a second interface. The first interface and the second interface are connected by a communication cable. In this embodiment, both the first interface and the second interface are physical interfaces, and different interface types can be adopted according to the type of information to be transmitted.

[0064] In this embodiment, the vehicle-mounted ETC device is an ETC device installed later in the vehicle. The information communicated between the ETC module 13 and the vehicle-mounted ETC device can include one or more of payment information, commodity information, order information, and vehicle communication information. These information do not include audio data and video data, so the data volume is very small, and there will be no complex interaction protocols and special formats. Since the interface types of the first interface and the second interface need to be consistent, both the first interface and the second interface in this embodiment adopt UART serial interfaces, and the first interface and the second interface are connected through a serial bus to realize information interaction between the vehicle head unit main body module 12 and the ETC module 13.

[0065] In addition, the ETC module 13 can be powered through the second interface. At this time, the power line in the second interface needs to be connected to the power supply terminal in the vehicle head unit main body module 12.

[0066] Please refer to Figure 2, in this embodiment, the ETC module 13 includes a main control chip MCU. The main control chip MCU uses a UART serial interface as the external interface of the ETC module 13 to the vehicle head unit main module 12. The vehicle head unit main module 12 includes a system-on-chip SOC. The system-on-chip SOC uses a UART serial interface as the integrated interface of the vehicle head unit main module 12 to the ETC module. Such a connection method integrates the vehicle head unit main module 12 and the ETC module 13. That is to say, the ETC module 13 is built into the vehicle head unit system.

[0067] In the embodiment of the present invention, the information communication between the vehicle head unit system and the in-vehicle ETC device is realized through the ETC module 13 built into the vehicle head unit system.

[0068] In addition, in order to prevent the vehicle head unit system from communicating with the in-vehicle ETC devices in other vehicles, that is, to prevent the interference of the in-vehicle ETC devices in adjacent vehicles, the radio frequency antenna for sending and receiving information in the ETC module 13 uses a directional antenna, and the radio frequency antenna points to the in-vehicle ETC device in the same vehicle, and the gain of the radio frequency antenna is attenuated so that the range for the ETC module 13 to send and receive information is less than or equal to the vehicle body space. Specifically, the gain of the radio frequency antenna can be attenuated to make the distance for sending and receiving information basically the same as the distance from the ETC module to the in-vehicle ETC device. For example, the distance for sending and receiving information is set to about 1 meter. In this way, the wireless communication direction of the vehicle head unit system can only point to the position of the in-vehicle ETC device in the same vehicle, and the communication distance can be just limited within the range of the in-vehicle ETC device in the same vehicle, avoiding the interference of the in-vehicle ETC devices in adjacent vehicles.

[0069] Next, the working modes of the vehicle head unit system provided in the embodiment of the present invention in two application scenarios will be described.

[0070] Please refer to Figure 3 , Figure 3 which is a flowchart of the communication method of the vehicle head unit system integrated with the in-vehicle ETC module in an embodiment, hereinafter referred to as the method. The method includes the following steps:

[0071] Step 201: After the vehicle head unit system is powered on and connected to the Internet through the in-vehicle communication device, the user clicks the required commodity through the human-computer interaction module 11 to generate a commodity transaction request. In this embodiment, the commodities are mostly Internet value-added entertainment products, such as paid online music, paid online videos, and paid online novels, etc.

[0072] Step 202: The vehicle head unit main module 12 receives a commodity transaction request, where the commodity transaction request includes the commodity information of the commodity to be traded. The commodity information includes information such as the name and category of the commodity.

[0073] Step 203: The in-vehicle device main body module 12 sends the commodity transaction request to the corresponding commodity transaction server. When the commodity is a paid online video, the commodity transaction server is the video playback website server; when the commodity is a paid online music, the commodity transaction server is the music playback website server; when the commodity is a paid online novel, the commodity transaction server is the novel reading website server.

[0074] Step 204: The in-vehicle device main body module 12 receives the payment information sent by the commodity transaction server and displays the payment information on the human-computer interaction module 11. Among them, the payment information includes information such as the fee to be paid.

[0075] Step 205: The user confirms whether to pay through the payment information displayed on the human-computer interaction module 11. If the user clicks to confirm the payment, a request for confirming the payment is generated.

[0076] Step 206: After receiving the request for confirming the payment, the in-vehicle device main body module 12 obtains the vehicle information, generates corresponding order information according to the vehicle information and the payment information, and sends the order information to the ETC module.

[0077] Among them, the vehicle information includes the information of the in-vehicle system and the information of the vehicle itself. The in-vehicle device main body module 12 combines and packages the vehicle information and the payment information into a complete information package to form the order information, and then sends the order information to the in-vehicle ETC device through the ETC module.

[0078] Step 207: The ETC module 13 sends the order information sent by the in-vehicle device main body module 12 to the in-vehicle ETC device. After caching the order information in the internal memory, the in-vehicle ETC device sends a cache success response to the in-vehicle device main body module, so that the in-vehicle device main body module is in the paid cache success state.

[0079] After receiving the order information sent by the in-vehicle device main body module 12, the ETC module 13 forwards the order information to the in-vehicle ETC device by using the dedicated short-range wireless communication technology DSRC for ETC. A listening program runs in the software system of the in-vehicle ETC device. Once a new data packet information (order information) is sent and detected, the new data packet information is immediately read into the internal memory, and then the new data packet information is cached in the solid-state memory. After the caching is successful, the in-vehicle ETC device returns a cache success response command to the ETC module. The ETC module forwards the cache success response command to the commodity transaction server through the in-vehicle device main body module. After receiving the cache success response command, the commodity transaction server can use it as a flag for processing some software processes and logics. At this time, the user can watch the commodity (value-added service entertainment product) through the human-computer interaction module 11.

[0080] Step 208: When the vehicle-mounted ETC device enters the ETC toll station of the highway, it makes a payment through the pre-bound bank back-end server according to the cached order information.

[0081] Please refer to Figure 4 , Figure 4 For the flowchart of the communication method of the in-vehicle system with an integrated vehicle-mounted ETC module in another embodiment, hereinafter referred to as the method, the method includes the following steps:

[0082] Step 301: The user clicks the button to obtain vehicle passing information through the human-computer interaction module 11 and generates a request to obtain vehicle passing information.

[0083] Step 302: The in-vehicle main body module 12 receives a request to obtain vehicle passing information.

[0084] Step 303: The in-vehicle main body module 12 sends the request to obtain vehicle passing information to the ETC module 13.

[0085] Step 304: The ETC module 13 sends the request to obtain vehicle passing information sent by the in-vehicle main body module 12 to the vehicle-mounted ETC device. The vehicle-mounted ETC device reads the corresponding vehicle passing information from the internal memory according to the request to obtain vehicle passing information, and sends the vehicle passing information to the in-vehicle main body module through the ETC module 13 to display the vehicle passing information on the human-computer interaction module 11.

[0086] The in-vehicle system provided by the embodiment of the present invention realizes the information communication between the in-vehicle system and the vehicle-mounted ETC device. Without the need for Internet access, it enables vehicle users to quickly query vehicle passing information, improving the user experience. Moreover, it realizes the information communication among the off-vehicle network device, the in-vehicle system, and the vehicle-mounted ETC device, and enables the Internet value-added entertainment service of the in-vehicle system to be paid through the vehicle-mounted ETC device, improving the user experience in the ETC payment scenario.

[0087] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, according to the idea of the present invention, several simple deductions, deformations, or substitutions can also be made.

Claims

1. An in-vehicle head unit system integrated with an on-vehicle ETC module is used to realize information communication between the on-vehicle ETC device and the head unit system. It is characterized in that it includes: A head unit main module is used for information interaction with users inside the vehicle and information communication with external network devices outside the vehicle; An ETC module, the ETC module is electrically connected to the head unit main module, the ETC module is wirelessly connected to the on-vehicle ETC device, and the ETC module is used for information communication with the on-vehicle ETC device; Wherein, the head unit main module receives a commodity transaction request, and the commodity transaction request includes commodity information of the commodity to be traded; The head unit main module sends the commodity transaction request to the corresponding commodity transaction server; The head unit main module receives the payment information sent by the commodity transaction server and displays the payment information; After receiving a request for confirmed payment, the head unit main module obtains vehicle information, generates corresponding order information according to the vehicle information and the payment information, and sends the order information to the ETC module; The ETC module sends the order information sent by the head unit main module to the on-vehicle ETC device, and the on-vehicle ETC device caches the order information in the internal memory and then sends a cache success response to the head unit main module, so that the head unit main module is in a paid cache success state; When the vehicle enters the highway ETC toll station, the on-vehicle ETC device makes a payment according to the order information.

2. The in-vehicle head unit system integrated with an on-vehicle ETC module according to claim 1, It is characterized in that the ETC module includes: A radio frequency antenna, the radio frequency antenna points to the on-vehicle ETC device, and the radio frequency antenna is used to send information to the on-vehicle ETC device and receive information sent by the on-vehicle ETC device; Wherein, the gain of the radio frequency antenna satisfies that the range of sending and receiving information is less than or equal to the vehicle body space.

3. The in-vehicle head unit system integrated with an on-vehicle ETC module according to claim 2, It is characterized in that the gain of the radio frequency antenna satisfies that the distance of sending and receiving information is the distance from the ETC module to the on-vehicle ETC device.

4. The in-vehicle head unit system integrated with an on-vehicle ETC module according to claim 1, It is characterized in that the head unit main module includes a first interface, and the ETC module includes a second interface; The first interface is connected to the second interface through a communication cable.

5. The in-vehicle head unit system integrated with an on-vehicle ETC module according to claim 4, It is characterized in that the first interface and the second interface are UART serial interfaces.

6. The in-vehicle head unit system integrated with an on-vehicle ETC module according to any one of claims 1-5, It is characterized in that the head unit main module is used for information communication with external network devices and in-vehicle devices, including: Receiving a request for obtaining vehicle passing information; Sending the request for obtaining vehicle passing information to the ETC module; The ETC module is used for information communication with the on-vehicle ETC device, including: Send the request for obtaining vehicle passing information sent by the in-vehicle head unit main module to the in-vehicle ETC device. The in-vehicle ETC device reads the corresponding vehicle passing information from the internal memory according to the request for obtaining vehicle passing information, and sends the vehicle passing information to the in-vehicle head unit main module through the ETC module.

7. The in-vehicle head unit system integrated with an in-vehicle ETC module according to claim 1, characterized in that, it further includes: A human-machine interaction module for displaying information and receiving user requests; wherein, the information includes at least one of payment information, commodity information, order information, and vehicle passing information, and the user request includes a commodity transaction request or a vehicle passing information request.

8. A communication method for an in-vehicle head unit system integrated with an in-vehicle ETC module, characterized in that, the in-vehicle head unit system includes: an in-vehicle head unit main module and an ETC module; The in-vehicle head unit main module receives a commodity transaction request, and the commodity transaction request includes the commodity information of the commodity to be traded; The in-vehicle head unit main module sends the commodity transaction request to the corresponding commodity transaction server; The in-vehicle head unit main module receives the payment information sent by the commodity transaction server and displays the payment information; After receiving the request for confirming payment, the in-vehicle head unit main module obtains vehicle information, generates corresponding order information according to the vehicle information and the payment information, and sends the order information to the ETC module; The ETC module sends the order information sent by the in-vehicle head unit main module to the in-vehicle ETC device. The in-vehicle ETC device caches the order information in the internal memory and then sends a cache success response to the in-vehicle head unit main module, so that the in-vehicle head unit main module is in the state of successful payment caching; wherein, the in-vehicle ETC device makes a payment according to the order information when the vehicle enters the highway ETC toll station.

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