Distributed multimode digital automobile key system and control method thereof

Abstract

The invention discloses a distributed multi-mode digital automobile key system which comprises a communication module used for interacting with a user, identifying the user and transmitting an identified signal to a vehicle-mounted terminal device; the vehicle-mounted terminal equipment interacts with a user through the communication module, is connected with the whole vehicle CAN and sends an obtained instruction to the execution module on the vehicle; the vehicle lock is used for obtaining an instruction of the vehicle-mounted terminal equipment to lock or unlock the vehicle; the communication module comprises a 4G unit, a 5G unit, a Bluetooth unit, an NFC unit, a zigbee unit, an RFID unit and a UWB unit which are independent. According to the split type digital key module, the mode that one or more split type digital keys are arranged in parallel is adopted, the reliability of the split type digital key module is achieved, and the problems that unlocking cannot be achieved and unlocking is not sensitive due to function failure of an integrated type digital key module are solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle network communication. Background Art

[0002] Digital keys effectively solve the problem of inconvenient carrying of physical keys, but there are also problems such as low reliability and low positioning accuracy, which greatly affect the user experience. Existing digital keys are mostly based on Bluetooth / vision and other solutions. Through an integrated digital key module + fusion positioning method, the hardware and software are integrated separately to achieve the optimal cost. It involves obtaining position information based on Bluetooth detection and vision detection, and determining the fusion positioning trajectory through a fusion matching algorithm.

[0003] For example, in the publicly disclosed document with the publication number CN110080617A, the publication date of August 2, 2019, and the patent name "Digital Key System", in the disclosed digital key system, the digital key and the digital lock are connected through two terminals, and there is a circuit for superimposing and separating high-frequency signals and direct current. The microcomputer is driven by receiving the supply of direct current from the battery of the digital key connected to the digital lock via the circuit (EC), and thus high-frequency signal communication is carried out between the digital key via the circuit through NFC. The unlocking permission information is read from the non-contact memory, and authentication is performed on the read unlocking permission information.

[0004] Similar multi-mode digital keys are limited by communication mode problems, and there will be reduced reliability, inability to unlock due to function failure, insensitive unlocking, etc. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to implement a split digital key module system to overcome the problems such as the function failure of the digital key module caused by a single communication method, resulting in inability to unlock, insensitive unlocking, etc.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a distributed multi-mode digital vehicle key system, including:

[0007] A communication module, which is used to interact with and identify the user, and transmit the identified signal to the vehicle-mounted terminal device;

[0008] The vehicle-mounted terminal device uses the communication module to interact with the user, and connects to the vehicle CAN to send the obtained instructions to the execution module on the vehicle;

[0009] The vehicle lock: obtains the instructions of the vehicle-mounted terminal device to lock or unlock the vehicle;

[0010] The communication module includes independent 4G unit, 5G unit, Bluetooth unit, NFC unit, zigbee unit, RFID unit, and UWB unit.

[0011] There are at least two Bluetooth units, one of which is the main Bluetooth, and the remaining secondary Bluetooths are redundant configurations of the main Bluetooth.

[0012] The 4G unit or 5G unit is connected to the vehicle networking background to obtain unlocking or locking instructions and service data information from the vehicle networking background. The service data information includes location service, communication service, electronic fence, navigation, entertainment, information, security, SNS, remote maintenance, and in-vehicle system update.

[0013] The system also includes an instrument, which is connected to the in-vehicle terminal device and transmits instrument parameter information to the in-vehicle terminal device. The instrument parameter information includes vehicle speed and driving mileage.

[0014] Based on the control method of the distributed multi-mode digital vehicle key system, when the key module approaches the vehicle and enters the electronic fence area, it first uses the default communication to interact with the user. If the interaction fails in the default mode, it will sequentially use different communication methods to interact with the user according to the set priority order. If one of the communication methods is successfully recognized, unlocking will be performed.

[0015] The default communication method is the main Bluetooth. In the case of abnormal main Bluetooth, it will automatically switch to the secondary Bluetooth. In the case of both modules failing, it will automatically switch to the 4G / 5G mode. In case of failure, communication will be carried out through the UWB unit and zigbee unit.

[0016] Remote activation / locking method: The vehicle networking background issues unlocking and locking instructions. After the in-vehicle terminal receives the instructions from the vehicle networking background, the terminal sends an application message through the CAN line to complete remote locking / unlocking. After the vehicle controller receives this signal, it performs encryption verification. After passing the verification, remote locking / unlocking is performed, and the result of successful execution is fed back to the vehicle networking background.

[0017] UWB unit and zigbee unit activation / locking method: The vehicle prompts the user to turn on the UWB / zigbee of the carried device for communication, and manually interacts with the vehicle's UWB unit and zigbee unit to achieve unlocking / locking.

[0018] In-vehicle terminal and vehicle controller verification method: During the final assembly and offline of the vehicle factory, PIN codes are written into the two controllers respectively through the electrical inspection equipment. When the remote activation locking function is enabled, the vehicle controller sends a seed on the CAN, calculates the K1 value by combining the PIN code and the key. The in-vehicle terminal calculates the K2 value using the PIN code and the key, and compares it with K1. If the results are the same, the verification passes.

[0019] The present invention adopts a method of arranging one or more split digital keys in parallel to achieve the reliability of the split digital key module, and overcome the problems of being unable to unlock or insensitive to unlocking caused by functional failure of the integrated digital key module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief description of the contents expressed in each figure in the specification of the present invention:

[0021] Figure 1 This is a schematic diagram of a multi-modal digital key system;

[0022] Figure 2 This is a flow chart of the multimodal digital key system. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation methods of the present invention, such as the shape, structure, relative position and connection relationship between the various components involved, the function and working principle of each part, the manufacturing process and operation method, etc., through the description of the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0024] The present invention is based on a multi-modal digital key system and control method based on a digital key system, an on-board information module, a digital key module, a vehicle controller module, and a vehicle networking background. When approaching a vehicle, the vehicle can provide multi-source data such as 4G / 5G, independent Bluetooth module ≥ 2, UWB, GPS, etc. When the user enters the electronic fence area, the multi-mode device is automatically turned on. In the case of failure of the electronic fence, the multi-mode device can be turned on manually. In some complex environments, users can switch networks seamlessly according to their own needs through strategies to achieve vehicle positioning and unlocking.

[0025] Among them, the communication module on the vehicle is used to interact with and identify the user, and transmit the identified signal to the vehicle-mounted terminal device. To provide reliability, the communication mode is increased, that is, the communication module includes independent 4G unit, 5G unit, Bluetooth unit, NFC unit, zigbee unit, RFID unit, and UWB unit. The communication mode serves the vehicle-mounted terminal device and transmits the signals collected by the interaction to the vehicle-mounted terminal device. In this way, the vehicle-mounted terminal device uses the communication module to interact with the user, and connects to the vehicle's CAN to send the obtained instructions to the execution module on the vehicle. The vehicle lock is the final execution mechanism, responsible for locking and unlocking the vehicle. When the vehicle lock obtains the instruction from the vehicle-mounted terminal device to lock or unlock the vehicle; in addition, the vehicle-mounted terminal device is connected to the vehicle instrument through the CAN network, and the vehicle instrument transmits the instrument parameter information to the vehicle-mounted terminal device. The instrument parameter information includes vehicle speed, driving mileage, etc. In this way, by adopting the method of parallel arrangement of one or more split digital keys, the reliability of the split digital key module is realized, and the problems such as inability to unlock and insensitive unlocking caused by the functional failure of the integrated digital key module are overcome. When working, a key switch is designed to control the functions of (4G, 5G, Bluetooth, NFC, zigbee, RFID, UWB), etc. The digital key unlocking algorithm defaults to Bluetooth, and at the same time, UWB / zigbee can be manually set. In the case of Bluetooth abnormality, it automatically switches to the backup Bluetooth module. In the case of both modules failing, it automatically switches to the 4G / 5G mode. Even in the case of network abnormality, UWB / zigbee can be manually turned on, truly achieving an ultra-safe key.

[0026] The digital key unlocking success rate f(x) = fn(4G / 5G)||fn(Blutooth)||fn(NFC)||fn(zigbee)||fn(RFID)||fn(UWB), where n is the number of modules of a single technology n = (1, 2, 3, 4...), x is the communication module, x = 4G, 5G, Bluetooth, NFC, zigbee, RFID, UWB), and f(x) ≤ 1.

[0027] Specifically, the equipment included is as follows:

[0028] Vehicle-mounted terminal device: This product has the functions of the Internet and the ability to exchange within the vehicle's CAN / Ethernet. It can receive instructions from the vehicle networking background and convert the instructions into vehicle signals and then send them to other controllers.

[0029] In-vehicle Bluetooth module. Generally, at least two in-vehicle Bluetooth modules are set. One is the main Bluetooth, and the remaining ones can be used as Bluetooth modules for other devices respectively. However, at least one is the secondary Bluetooth with key function. Its main function is redundant design and is used as a backup when the main Bluetooth fails. This module is responsible for realizing the connection and positioning functions between the mobile phone and the vehicle in the absence of a network. Considering Bluetooth stability, it is required that the Bluetooth module ≥2 and it is an independent module with a split design, which can perform positioning and communication respectively.

[0030] UWB or zigbee module. In extreme cases where there is no network and Bluetooth is interfered, this module activates the emergency channel through a switch to realize the unlocking function.

[0031] Vehicle networking background: It occupies a core position in the vehicle networking industrial chain, connecting with automobile manufacturers, in-vehicle device manufacturers, network operators at the upper level, and content providers at the lower level. The services integrate modern computer technologies such as location services and communication services, providing powerful services for vehicle owners and individuals: electronic fence, navigation, entertainment, information, security, SNS, remote maintenance. In the vehicle locking system, the vehicle networking background can send some lock activation, unlocking and other instructions.

[0032] Instrument: It displays the running conditions of the whole vehicle, such as vehicle speed, mileage, etc. In the digital key system, the instrument can display the signal status of the vehicle, and the user can manually switch the key mode (4G / 5G, BLE, UWB, GPS) according to the signal situation.

[0033] Control method based on a distributed multi-mode digital vehicle key system. The core is that when the key module approaches the vehicle and enters the electronic fence area, it first interacts with the user using the default communication. If the interaction fails in the default way, it will sequentially use different communication methods to interact with the user according to the set priority order. If one of the communication methods is successfully recognized, unlocking will be performed. The default communication method is the main Bluetooth. When the main Bluetooth is abnormal, it automatically switches to the secondary Bluetooth. In the case where both modules fail, it automatically switches to the 4G / 5G mode. In case of failure, communication is carried out through the UWB unit and the zigbee unit.

[0034] The specific control method includes the following steps:

[0035] Remote activation / closure of the vehicle locking function - The vehicle networking background of TSP issues a remote unlocking instruction. After the in-vehicle terminal receives the instruction from the vehicle networking background, the terminal sends an application message "Request to activate / close the vehicle locking function" through the CAN line. After receiving this signal, the vehicle controller performs encryption verification. After the verification passes, it activates / closes the vehicle locking function and feeds back the successful execution result to the vehicle networking background.

[0036] Dual Bluetooth module for locking / unlocking the vehicle - Through the Bluetooth module, positioning, welcome, unlocking / locking are completed. By means of the backup Bluetooth module, the reliability of locking / unlocking is increased.

[0037] Remote locking / unlocking of the vehicle - The TSP vehicle networking background issues the locking / unlocking instruction. After the in-vehicle terminal receives the instruction from the vehicle networking background, the terminal sends the application message "Remote locking / unlocking" through the CAN line. After receiving this signal, the vehicle control unit performs encryption verification. After the verification passes, it remotely locks / unlocks the vehicle and feeds back the successful execution result to the vehicle networking background.

[0038] UWB / zigbee unlocking / locking - In extreme cases where the network is almost unavailable or positioning is difficult, a more reliable technology needs to be used. At this time, according to the vehicle prompt, UWB / zigbee can be turned on for communication to achieve unlocking / locking.

[0039] Verification between the in-vehicle terminal and the vehicle control unit - When the vehicle is assembled and off the production line at the vehicle factory, PIN codes are written into the two controllers respectively through the electrical inspection equipment. When the remote activation locking function is activated, the vehicle control unit sends a seed on the CAN. Combining the PIN code and the key, the K1 value is calculated. The in-vehicle terminal calculates the K2 value using the PIN code and the key and compares it with K1. If the results are the same, the verification passes.

[0040] Without adding resources, the present invention realizes the reliability of the digital key through the seamless switching of multiple networks. For this system, the vehicle networking background sends relevant instructions to the in-vehicle terminal. After the in-vehicle terminal and the vehicle control unit complete the handshake verification, the controller performs the corresponding work.

[0041] Activation / Deactivation of the locking instruction:

[0042] First, the vehicle networking background issues the activation / deactivation instruction; next, after the in-vehicle terminal receives the instruction, it sends the application message to the vehicle control unit through the CAN line; further, after the vehicle control unit receives the in-vehicle terminal instruction, it initiates the handshake verification with the in-vehicle terminal and sends the verification result and activation status to the in-vehicle terminal; finally, the in-vehicle terminal forwards the verification result and activation status feedback by the controller to the vehicle networking background, and the vehicle networking background displays the result of this execution.

[0043] Enable / Disable the locking instruction:

[0044] First, the vehicle networking backend issues an enable / disable command. Next, after the in-vehicle terminal receives the command, it sends the application message to the vehicle controller via the CAN line. Further, after the vehicle controller receives the in-vehicle terminal command, it initiates a handshake verification with the in-vehicle terminal and sends the verification result and activation status to the in-vehicle terminal. Finally, the in-vehicle terminal forwards the verification result and activation status feedback from the controller to the vehicle networking backend, and the vehicle networking backend displays the result of this execution.

[0045] Handshake verification:

[0046] When activating / deactivating the vehicle's locking function or locking / unlocking the vehicle, the vehicle controller needs to perform a handshake verification with the in-vehicle terminal to ensure that the terminal has not been altered or attacked by the network. Each time the vehicle is powered on, the vehicle controller needs to perform a verification with the in-vehicle terminal to prevent the in-vehicle terminal from being removed or altered.

[0047] The handshake verification includes the following process:

[0048] When the vehicle is turned ON and started, the vehicle controller initiates the handshake verification. Next, after the in-vehicle terminal receives the command initiated by the vehicle controller, the in-vehicle terminal replies that it is ready. Further, after the vehicle controller receives the command, it sends a key to the CAN line and calculates the K1 value using the key and the PIN code written before leaving the factory by itself through an algorithm. The in-vehicle terminal calculates the K2 value using the key received on the CAN and the PIN code written before leaving the factory by itself through an algorithm. Further, the vehicle controller compares the K1 and K2 values. When the two values are the same, the vehicle controller feeds back the verification result and the execution status of the controller to the in-vehicle terminal.

[0049] Multi-modal key:

[0050] When the Bluetooth function is normal and the user approaches the vehicle, the vehicle executes the unlocking function. Considering the stability of Bluetooth (95%), the digital key function can be realized by means of a backup Bluetooth module at this time. If it still doesn't work at this time, including the situation of Bluetooth hardware or Bluetooth environmental interference, the vehicle communication and unlocking function can be completed through the 4G / 5G channel. If it still doesn't work at this time, the unlocking and locking functions can also be realized by manually enabling dedicated channels such as UWB / zigbee. If the reliability requirement is changed, two independent solutions can be arranged simultaneously.

[0051] The present invention considers the vehicle unlocking and locking functions under various abnormal situations such as device abnormalities, signal abnormalities, and environmental abnormalities, and truly enables the user to safely leave the physical key at home at any time and anywhere, ensuring the high reliability of the digital key for the user in some complex and harsh environments.

[0052] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A distributed multi-mode digital car key system, comprising: A communication module is used to interact and identify the user and transmit the identified signal to the vehicle terminal device; The vehicle terminal device uses the communication module to interact with the user and connects to the vehicle CAN to send the acquired instructions to the execution module on the vehicle; Vehicle lock: Get instructions from the vehicle terminal device to lock or unlock the vehicle; It is characterized in that the communication module includes independent 4G unit, 5G unit, Bluetooth unit, NFC unit, zigbee unit, RFID unit and UWB unit.

2. The distributed multi-mode digital car key system according to claim 1, characterized in that: The Bluetooth units are provided with at least two, one of which is a main Bluetooth, and the remaining secondary Bluetooths are redundant configurations of the main Bluetooth.

3. The distributed multi-mode digital car key system according to claim 1, characterized in that: The 4G unit or 5G unit is connected to the Internet of Vehicles backend to obtain unlocking or locking instructions and service data information from the Internet of Vehicles backend. The service data information includes location services, communication services, electronic fences, navigation, entertainment, information, security, SNS, remote maintenance, and vehicle system updates.

4. The distributed multi-mode digital car key system according to claim 1, characterized in that: The system also includes a meter, which is connected to the vehicle-mounted terminal device and transmits meter parameter information to the vehicle-mounted terminal device, wherein the meter parameter information includes vehicle speed and mileage.

5. A control method based on a distributed multi-mode digital car key system, characterized in that: When the key module approaches the vehicle and enters the electronic fence area, it first uses the default communication to interact with the user. If the default interaction fails, it uses different communication methods in the set priority order to interact with the user. If one of the communication methods is successfully recognized, it will be unlocked.

6. The control method according to claim 5, characterized in that: The default communication mode is the primary Bluetooth. When the primary Bluetooth is abnormal, it will automatically switch to the secondary Bluetooth. When both modules fail, it will automatically switch to 4G / 5G mode. If they fail, it will communicate through the UWB unit and zigbee unit.

7. The control method according to claim 5, characterized in that: Remotely activate / deactivate the vehicle locking method, and send the unlocking command through the vehicle networking background. After the vehicle terminal receives the command from the vehicle networking background, the terminal sends the application message through the CAN line to complete the remote locking / unlocking of the vehicle. After the vehicle controller receives the signal, it performs encryption verification. After the verification passes, the vehicle is remotely locked / unlocked, and the successful execution result is fed back to the vehicle network background.

8. The control method according to claim 5, characterized in that: The UWB unit and zigbee unit activate / deactivate the vehicle locking method. The vehicle prompts the user to turn on the UWB / zigbee of the device to communicate, and manually interacts with the vehicle's UWB unit and zigbee unit to achieve unlocking / locking.

9. The control method according to claim 5, characterized in that: The verification method between the on-board terminal and the vehicle controller is that when the vehicle is assembled at the factory, the PIN code is written to the two controllers respectively through the electrical inspection equipment. When the vehicle lock function is remotely activated, the vehicle controller sends a seed to the CAN, and calculates the K1 value based on the PIN code and the key. The on-board terminal calculates the K2 value using the PIN code and the key, and compares it with K1. If the results are the same, the verification is passed.

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