Vehicle-mounted hotspot NFC intelligent connection system and method

Abstract

The invention relates to the technical field of intelligent vehicle-mounted equipment and wireless communication, and discloses a vehicle-mounted hotspot NFC intelligent connection system and method, and the system comprises a hardware part and a software part. The hardware part comprises an NFC label module, a control unit and an interference clearing device; and the software part comprises a touch response module, a dynamic key generation module and an automatic connection module. The method corresponds to the system. By adopting the method and the device, a user can complete equipment authentication by touching the NFC tag through the mobile equipment and automatically opening the vehicle-mounted hotspot, and illegal access can be prevented by adopting the encrypted tag and the dynamic password.

Description

Technical Field

[0001] This application relates to the technical fields of intelligent vehicle-mounted devices and wireless communication technologies, and specifically to a vehicle-mounted hotspot NFC intelligent connection system and method. Background Art

[0002] With the popularization of intelligent vehicle-mounted devices, vehicle-mounted WiFi hotspots have become one of the important functions of modern vehicles, providing users with convenient network access services. However, the existing vehicle-mounted hotspot technologies still have significant deficiencies, mainly reflected in the following aspects:

[0003] (1) Complicated operation and security risks

[0004] Traditional vehicle-mounted hotspots require users to manually turn on and enter static passwords. The operation process is complex, and it may distract users' attention during driving, increasing security risks. In addition, fixed passwords are prone to being leaked or cracked after long-term use, posing a risk of illegal access.

[0005] (2) Limited application of NFC technology

[0006] Although NFC technology has been widely used in fields such as payment and access control, there is no standardized solution in vehicle-mounted hotspot interactions. Existing vehicle-mounted NFC devices are mostly used for key authentication or data transmission, and are not deeply integrated with the network sharing function, resulting in poor device compatibility (such as only supporting specific tag types), and electromagnetic interference in the vehicle-mounted electronic environment (such as engines and in-vehicle entertainment systems) will significantly reduce the stability of NFC communication.

[0007] (3) Lack of dynamic security mechanisms and priority management

[0008] Existing solutions generally use static passwords or pre-stored keys, lacking a dynamic update mechanism and being difficult to cope with complex security threats. In addition, when multiple devices access concurrently, there is a lack of effective priority management strategies, and network resources cannot be differentially allocated according to user identities (such as vehicle owners and visitors), affecting the user experience.

[0009] In view of the above problems, there is an urgent need for a vehicle-mounted hotspot solution that can achieve fast connection, dynamic security protection, and optimize signal stability. Summary of the Invention

[0010] The purpose of this application is to provide a vehicle-mounted hotspot NFC intelligent connection system and method to solve the technical problems raised in the above background.

[0011] To achieve the above purpose, this application discloses the following technical solutions:

[0012] In the first aspect, this application discloses a vehicle-mounted hotspot NFC intelligent connection method, including a hardware part and a software part;

[0013] The hardware part includes:

[0014] The NFC tag module includes at least one NFC tag, and the NFC tag is built-in with an encryption chip and a unique identifier for triggering a touch response;

[0015] The control unit integrates a WiFi module for parsing signals and controlling the turning on and off of the vehicle-mounted hotspot;

[0016] The interference elimination device is arranged around the NFC tag for reducing the interference of vehicle-mounted electronic devices on the NFC signal;

[0017] The software part includes:

[0018] The touch response module triggers UID reading and encryption verification after a mobile device touches the NFC tag;

[0019] The dynamic key generation module is used for generating a random password that is updated regularly or manually, and transmitting it to the mobile device through encryption;

[0020] The automatic connection module supports concurrent access of multiple devices and priority management, and by default, the device connected through NFC touch is a low-priority visitor.

[0021] Preferably, the encryption verification step includes:

[0022] The mobile device reads the UID of the NFC tag and sends it to the control unit;

[0023] The control unit generates a response code and returns it to the mobile device;

[0024] The mobile device sends a fixed key to the control unit for comparison and authentication, and after the authentication is passed, an encrypted communication is established.

[0025] Preferably, the random password generated by the dynamic key generation module is an 8-digit random number. Among the generated random numbers:

[0026] 0 - 9 correspond to the numbers 0 - 9;

[0027] 10 - 35 correspond to the lowercase letters a - z;

[0028] 36 - 61 correspond to the capital letters A - Z.

[0029] Preferably, the interference elimination device is a wave-absorbing material or a ferrite film.

[0030] Preferably, the priority management includes adjusting device permissions through the vehicle-mounted central control terminal interface, and the adjustment of device permissions includes network speed allocation and visitor mode switching.

[0031] Second aspect, the present application discloses a vehicle-mounted hotspot NFC intelligent connection method, which is applied to the vehicle-mounted hotspot NFC intelligent connection system as described above. The method includes the following steps:

[0032] Access trigger: The user touches the NFC tag of the vehicle through a mobile device to trigger UID reading and encryption verification.

[0033] Password transmission: Dynamically generate a random password and send it to the mobile device through an encrypted channel, and the mobile device performs a WiFi connection.

[0034] Device access: When the priority conditions are met, the mobile device that passes the encryption verification is connected to the automatically activated vehicle-mounted hotspot to complete device access.

[0035] Among them, the vehicle-mounted hotspot NFC intelligent connection method further includes access management and environment optimization.

[0036] The environment optimization includes: reducing the interference of the vehicle-mounted environment on the NFC signal through an interference elimination device.

[0037] The access management specifically includes: performing priority management on the access of the mobile device, and by default, the device connected through NFC touch is a low-priority visitor.

[0038] Preferably, the encryption verification specifically includes:

[0039] The password exchange between the mobile device and the NFC tag is completed through a two-way encryption protocol, and a temporary session key is generated for each authentication.

[0040] Preferably, the validity period of the random password is a single connection cycle, and it automatically expires after the connection is disconnected.

[0041] Preferably, the single connection cycle is: from the successful authentication to the mobile device actively disconnecting the connection or the access timing out and disconnecting.

[0042] Preferably, the access management specifically includes:

[0043] Preferably, high bandwidth permissions and high priority access permissions are allocated to the mobile device of the vehicle owner, and the access management supports real-time adjustment through the central control interface..

[0044] Beneficial effects: The vehicle-mounted hotspot NFC intelligent connection system and method of the present application have the following beneficial effects compared with the prior art:

[0045] (1) When the user touches the in-vehicle NFC tag with a mobile device, it can automatically trigger the activation of the in-vehicle hotspot, encryption verification, and device access. There is no need to manually enter a password throughout the process, simplifying the operation process. Secondly, multi-device intelligent management: It supports concurrent access of multiple devices, and through the priority management module, high-bandwidth permissions are assigned to the owner's device, and the network speed of guest devices is restricted by default to ensure the network stability of critical devices;

[0046] (2) A random password is generated in real time through the dynamic key generation module, greatly reducing the risk of password leakage. Further, through the setting of the password validity period and the adoption of a temporary session key and two-way encryption protocol, the independence and security of each connection are ensured, preventing man-in-the-middle attacks or replay attacks.

[0047] (3) Through the setting of the interference elimination device, the electromagnetic interference of in-vehicle electronic devices on NFC signals is effectively isolated, improving communication reliability.

[0048] (4) The user can adjust the device priority and network permissions (such as increasing the bandwidth of guest devices) in real time through the in-vehicle central control terminal interface to meet the needs of diverse usage scenarios. Description of the Drawings

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0050] Figure 1 It is a structural block diagram of the in-vehicle hotspot NFC intelligent connection system provided by the embodiments of the present application. Detailed Embodiments

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0052] In this article, the term "including" is intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article, or device. Without more limitations, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article, or device including the said elements.

[0053] This embodiment discloses a vehicle-mounted hotspot NFC intelligent connection system as shown in Figure 1 the following, which includes a hardware part and a software part. The hardware part includes an NFC tag module, a control unit, and an interference elimination device. The software part includes a touch response module, a dynamic key generation module, and an automatic connection module.

[0054] Specifically

[0055] The NFC tag module includes at least one NFC tag. The NFC tag is built with an encryption chip and a unique identifier, and is used to trigger a touch response. It is feasible that the NFC tag module is integrated on the surface of the vehicle's center console box, adopting an embedded design and flush with the console box shell for easy user touch. The tag internally encapsulates an NFC Forum Type 4 standard chip (such as NTAG216), a built-in encryption chip (such as ATECC608A), and a unique identifier (UID).

[0056] The control unit integrates a WiFi module and is used to parse signals and control the turning on and off of the vehicle-mounted hotspot. It is feasible that the core component of the control unit adopts an ESP32-WROOM module, which integrates WiFi (802.11b / g / n protocol) and Bluetooth functions, and has a built-in MCU (Microcontroller Unit) responsible for signal parsing and logic control. During communication, it is connected to the vehicle's central control system through the CAN bus and receives priority adjustment instructions sent by the central control terminal.

[0057] The interference elimination device is arranged around the NFC tag and is used to reduce the interference of vehicle-mounted electronic devices on the NFC signal. The interference elimination device can be a wave-absorbing material or a ferrite film. In a feasible implementation, a layer of ferrite film (with a thickness of 0.5 mm) is covered around the NFC tag to form a closed shielding layer for absorbing electromagnetic interference in the 2.4 GHz frequency band generated by vehicle-mounted electronic devices (such as vehicle-mounted navigation and Bluetooth modules). In another feasible implementation, the wave-absorbing material uses a carbon-based composite material (such as Eccosorb MF-124), which is attached to the back side and surrounding area of the NFC tag module with a thickness of 3 mm, and the coverage area is not less than 1.5 times the area of the tag. Further, to ensure the efficiency and effect of interference elimination, when the vehicle is in the startup state, the interference elimination device automatically adjusts the shielding range according to the working frequency of the electronic device (obtained through the CAN bus). For example, when the vehicle audio is turned on, the coverage range of the wave-absorbing material expands to 5 cm around the tag.

[0058] The touch response module triggers UID reading and encryption verification after the mobile device touches the NFC tag. For example, the user brings a smartphone (such as an iPhone 12) close to the NFC tag in the central armrest box. After the tag senses the magnetic field, it is activated, reads the device information (such as the MAC address) of the mobile phone's NFC chip, and sends the tag UID to the control unit.

[0059] The dynamic key generation module is used to generate a randomly generated password that is updated either periodically or manually, and is encrypted and transmitted to the mobile device. In this embodiment, the encryption verification steps include:

[0060] The mobile device reads the UID of the NFC tag and sends it to the control unit;

[0061] The control unit generates a response code and returns it to the mobile device;

[0062] The mobile device sends a fixed key to the control unit for comparison and authentication. After successful authentication, an encrypted communication is established.

[0063] Secondly, the randomly generated password generated by the dynamic key generation module is an 8-digit random number. Among the generated random numbers:

[0064] 0 - 9 corresponds to the numbers 0 - 9;

[0065] 10 - 35 corresponds to the lowercase letters a - z;

[0066] 36 - 61 corresponds to the uppercase letters A - Z.

[0067] Exemplarily, the generation process of the random password corresponding to a set of random number sequences [5, 28, 42, 15, 60, 3, 37, 19]) is as follows:

[0068] Rule: 0 - 9 → numbers 0 - 9; 10 - 35 → lowercase letters a - z (e.g., 28 → s); 36 - 61 → uppercase letters A - Z (e.g., 42 → G);

[0069] The final password is "5sGfY3Bj".

[0070] The automatic connection module supports concurrent access of multiple devices and priority management, and by default, the device connected through NFC touch is a low-priority visitor. After the mobile device completes the encryption verification, the control unit automatically turns on the in-vehicle WiFi hotspot (such as the SSID is the last four digits of "Car_Hotspot_UID"), and encrypts and transmits the password to the mobile phone. The mobile phone automatically fills in the password through the system API and connects to the hotspot.

[0071] In this embodiment, the priority management includes adjusting the device permissions through the in-vehicle central control terminal interface, and the adjustment of device permissions includes network speed allocation and visitor mode switching.

[0072] A specific priority management process can be as follows:

[0073] (1) Default rule:

[0074] Devices connected via NFC touch (such as a visitor's mobile phone) are default assigned the "visitor mode" with a bandwidth limit of 2 Mbps.

[0075] (2) Owner privilege upgrade:

[0076] When the owner's mobile phone connects for the first time, the central control terminal automatically records its MAC address and binds it as the "owner device". During subsequent connections, the control unit directly assigns a high priority (bandwidth of 20 Mbps), and it can be manually adjusted through the central control interface (for example, temporarily raising the visitor device to 5 Mbps).

[0077] In the second aspect, this embodiment discloses a vehicle-mounted hotspot NFC intelligent connection method applied to the vehicle-mounted hotspot NFC intelligent connection system as described above. The method includes the following steps:

[0078] Access trigger: The user touches the NFC tag on the vehicle through the mobile device to trigger UID reading and encryption verification;

[0079] Password transmission: Dynamically generate a random password and send it to the mobile device through an encrypted channel, and the mobile device performs a WiFi connection;

[0080] Device access: Under the condition of meeting the priority conditions, the mobile device that passes the encryption verification is connected to the automatically activated vehicle-mounted hotspot to complete device access;

[0081] Among them, this vehicle-mounted hotspot NFC intelligent connection method further includes access management and environment optimization;

[0082] The environment optimization includes: reducing the interference of the vehicle-mounted environment on the NFC signal through an interference elimination device;

[0083] The access management specifically includes: performing priority management on the access of the mobile device, and by default, the device connected via NFC touch is a low-priority visitor.

[0084] Among them, the encryption verification specifically includes:

[0085] The password exchange between the mobile device and the NFC tag is completed through a two-way encryption protocol, and a temporary session key is generated for each authentication.

[0086] Among them, the validity period of the random password is a single connection cycle, and it automatically expires after the connection is disconnected.

[0087] Among them, the single connection cycle is: from the successful authentication to the mobile device actively disconnecting the connection or the access timing out and disconnecting.

[0088] Among them, the access management specifically includes:

[0089] Preferentially allocate high-bandwidth permissions and high-priority access permissions to the vehicle owner's mobile device, and the access management supports real-time adjustment through the central control interface.

[0090] It should be noted that the in-vehicle hotspot NFC intelligent connection method in this embodiment corresponds to the aforementioned in-vehicle hotspot NFC intelligent connection system. Therefore, for the content not specifically disclosed and described in this method (including specific technical solutions and technical effects), reference can be made to the relevant descriptions in the aforementioned in-vehicle hotspot NFC intelligent connection system, and this text will not elaborate here.

[0091] In the embodiments provided in this application, it should be understood that the embodiments described here can be implemented in hardware, software, firmware, middleware, code, or any appropriate combination thereof. For hardware implementation, the processor can be implemented in one or more of the following units: application-specific integrated circuit (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field-programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, or other electronic units designed to implement the functions described here, or a combination thereof. For software implementation, part or all of the processes of the embodiment can be completed by a computer program instructing the relevant hardware. When implemented, the above program can be stored in a computer-readable storage medium or transmitted as one or more instructions or codes on a computer-readable storage medium. The computer-readable storage medium includes computer storage media and communication media, where the communication media includes any medium facilitating the transmission of a computer program from one place to another. The storage medium can be any available medium accessible by a computer. The computer-readable storage medium can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM, or other optical disc storage, magnetic disk storage media, or other magnetic storage devices, or any other medium capable of carrying or storing the desired program code in the form of instructions or data structures and accessible by a computer.

[0092] Finally, it should be noted that the above are only the preferred embodiments of this application and are not used to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A vehicle-mounted hotspot NFC intelligent connection system, characterized in that: Including hardware and software parts; The hardware part includes: An NFC tag module, comprising at least one NFC tag, wherein the NFC tag has a built-in encryption chip and a unique identifier for triggering a touch response; The control unit integrates a WiFi module to analyze the signal and control the on-board hotspot on and off; An interference removal device, arranged around the NFC tag, for reducing the interference of the vehicle-mounted electronic equipment to the NFC signal; The software part includes: Touch response module, triggering UID reading and encryption verification by touching the NFC tag with a mobile device; A dynamic key generation module is used to generate a random password that is updated regularly or manually, and transmit it to the mobile device through encryption; The automatic connection module supports concurrent access and priority management of multiple devices, and devices connected via NFC touch are defaulted as low-priority visitors.

2. The vehicle-mounted hotspot NFC intelligent connection system according to claim 1, characterized in that: The encryption verification step includes: The mobile device reads the UID of the NFC tag and sends it to the control unit; The control unit generates a reply code and returns it to the mobile device; The mobile device sends a fixed key to the control unit for comparison and authentication, and encrypted communication is established after the authentication is passed.

3. The vehicle-mounted hotspot NFC intelligent connection system according to claim 1, characterized in that: The random password generated by the dynamic key generation module is an 8-bit random number, in which: 0~9 correspond to the numbers 0~9; 10 to 35 correspond to lowercase letters a to z; 36 to 61 correspond to uppercase letters A to Z.

4. The vehicle-mounted hotspot NFC intelligent connection system according to claim 1, characterized in that: The interference removal device is a wave absorbing material or a ferrite film.

5. The vehicle-mounted hotspot NFC intelligent connection system according to claim 1, characterized in that: The priority management includes adjusting device permissions through the vehicle-mounted central control terminal interface, and the adjusted device permissions include network speed allocation and guest mode switching.

6. A vehicle-mounted hotspot NFC intelligent connection method, applied to the vehicle-mounted hotspot NFC intelligent connection system according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: Access trigger: The user touches the vehicle's NFC tag with a mobile device to trigger UID reading and encryption verification; Password transmission: Dynamically generate a random password and send it to the mobile device through an encrypted channel, and the mobile device connects to WiFi; Device access: When the priority conditions are met, the device access is completed by connecting the encrypted verified mobile device to the automatically turned on vehicle hotspot; Among them, the vehicle-mounted hotspot NFC intelligent connection method also includes access management and environment optimization; The environmental optimization includes: reducing the interference of the vehicle environment to the NFC signal through an interference removal device; The access management specifically includes: performing priority management on the access of mobile devices, and setting devices connected by NFC touch as low-priority visitors by default.

7. The vehicle-mounted hotspot NFC intelligent connection method according to claim 6, characterized in that: The encryption verification specifically includes: Passwords are exchanged between the mobile device and the NFC tag through a two-way encryption protocol, and a temporary session key is generated for each authentication.

8. The vehicle-mounted hotspot NFC intelligent connection method according to claim 6, characterized in that: The random password is valid for a single connection period and will automatically become invalid after the connection is disconnected.

9. The vehicle-mounted hotspot NFC intelligent connection method according to claim 8, characterized in that: The single connection cycle is: from successful authentication to the mobile device actively disconnecting or disconnecting due to access timeout.

10. The vehicle-mounted hotspot NFC intelligent connection method according to claim 6, characterized in that: The access management specifically includes: High-bandwidth permissions and high-priority access permissions are preferentially allocated to the car owner's mobile device, and the access management supports real-time adjustment through the central control interface.

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