Multi-frequency time-sharing communication system and method

Abstract

The invention discloses a multi-frequency time-sharing communication system and method. The system comprises a controller and a plurality of wireless function modules, after the high-frequency signal of the matching object is received, a corresponding control instruction is generated according to the high-frequency signal of the matching object and sent to other function modules of the vehicle; when the controller replaces the matching object, the controller sends a corresponding low-frequency signal to the replaced corresponding wireless function module; after the replaced corresponding wireless function module receives the corresponding low-frequency signal, a high-frequency signal is sent to the controller; and after receiving the high-frequency signal of the replaced matching object, the controller generates a corresponding control instruction according to the high-frequency signal of the replaced matching object and sends the control instruction to other functional modules of the vehicle. According to the invention, the number of receivers needing a plurality of wireless function modules originally is reduced to one, so that the cost of the receivers is greatly saved, and no extra hardware circuit is introduced.

Description

Technical Field

[0001] The present invention relates to the field of automobile control, and in particular to a multi-frequency time-sharing communication system and method. Background Art

[0002] In traditional automotive design, each wireless functional module (such as door locks, start buttons, remote control keys, etc.) usually requires a separate receiver. Although this approach can ensure the independent operation of each module, it will increase the hardware cost because each functional module requires its own dedicated receiving device. This not only increases the manufacturing cost of the vehicle, but may also take up valuable space in the vehicle. Due to the limited space in the vehicle interior, especially in high-end models, more space needs to be reserved to install advanced entertainment systems, navigation systems and other advanced functions. The presence of multiple independent receivers will take up valuable space in the vehicle, which may limit the designer's possibility of innovation in other aspects. Summary of the invention

[0003] The embodiment of the present invention provides a multi-frequency time-division communication system and method, which manages multiple wireless function modules through a central controller to reduce manufacturing costs and optimize function execution processes.

[0004] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a multi-frequency time-division communication system, including: a controller and a plurality of wireless function modules;

[0005] The controller selects one wireless function module from the plurality of wireless function modules as a matching object; after receiving the high-frequency signal of the matching object, generates a corresponding control instruction according to the high-frequency signal of the matching object and sends it to other function modules of the vehicle;

[0006] When the controller replaces the matching object, the controller sends a corresponding low-frequency signal to the replaced corresponding wireless function module; after receiving the corresponding low-frequency signal, the replaced corresponding wireless function module sends a high-frequency signal to the controller; after receiving the high-frequency signal of the replaced matching object, the controller generates a corresponding control instruction according to the high-frequency signal of the replaced matching object and sends it to other functional modules of the vehicle.

[0007] In one possible implementation, the controller includes a high- and low-frequency transceiver module and a communication module; the high- and low-frequency transceiver module includes a low-frequency wireless transmitter and a high-frequency wireless receiver, the high-frequency wireless receiver is used to receive several high-frequency signals from different wireless functional modules, and the low-frequency wireless transmitter is used to transmit several low-frequency signals corresponding to the high-frequency signals; the communication module is used to communicate with other functional modules of the vehicle.

[0008] In a possible implementation, a related execution function module is further included, and the related execution function module is communicatively connected to the communication module, and the related execution function module is used to: after receiving the control instruction, execute a corresponding action according to the control instruction.

[0009] A second aspect of an embodiment of the present application provides a multi-frequency time-division communication method, which is applied to the controller as described above, comprising:

[0010] If the vehicle is in a power-off state, the high-frequency wireless receiver enters a polling state and switches to a working state according to a preset polling cycle; each time the high-frequency wireless receiver switches to a working state, the high-frequency wireless receiver receives a first high-frequency signal and switches the controller to a working state; each time the controller switches to a working state, the working state of the high-frequency wireless receiver and the working state of the vehicle are controlled according to a vehicle wake-up instruction;

[0011] If the vehicle is in a powered-on state, the high-frequency wireless receiver enters a continuous state, and continuously detects several high-frequency signals in sequence according to a preset detection order; after the high-frequency wireless receiver detects each high-frequency signal, if the controller does not receive a vehicle power-off command, the high-frequency wireless receiver continues to maintain a continuous state; if the controller receives a vehicle power-off command, causing the vehicle to enter a power-off state, the high-frequency wireless receiver enters a polling state.

[0012] In a possible implementation of the second aspect, each time the controller switches to the working state, controlling the working state of the high-frequency wireless receiver and the working state of the vehicle according to the vehicle wake-up instruction specifically includes:

[0013] Each time the controller switches to the working state, if the controller does not receive a vehicle wake-up instruction after the high-frequency wireless receiver receives the first high-frequency signal, the high-frequency wireless receiver continues to maintain the polling state and detects other high-frequency signals in sequence according to a preset detection order; if the controller receives a vehicle wake-up instruction after the high-frequency wireless receiver receives the first high-frequency signal, causing the vehicle to enter the power-on state, and the high-frequency wireless receiver enters the continuous state.

[0014] In a possible implementation manner of the second aspect, the high-frequency wireless receiver continues to maintain a polling state and sequentially detects other high-frequency signals according to a preset detection order, specifically including:

[0015] The high-frequency wireless receiver continues to maintain a polling state, and initializes the integrated circuit of the controller according to a preset detection sequence, so that the integrated circuit matches the corresponding wireless function module;

[0016] Each time the high-frequency wireless receiver switches to the working state, the high-frequency wireless receiver receives the high-frequency signal of the corresponding wireless function module and switches the controller to the working state; each time the controller switches to the working state, the working state of the high-frequency wireless receiver and the working state of the vehicle are controlled according to the vehicle wake-up instruction.

[0017] In a possible implementation manner of the second aspect, matching the integrated circuit with the corresponding wireless function module specifically includes:

[0018] The low-frequency wireless transmitter sends an authentication random number to the corresponding wireless function module, the controller generates a first calculation result according to the authentication random number, and the corresponding wireless function module generates a second calculation result according to the authentication random number;

[0019] If the first calculation result matches the second calculation result, the high-frequency signal ID code in the integrated circuit whitelist is rewritten so that the high-frequency signal ID code matches the corresponding high-frequency signal.

[0020] In a possible implementation of the second aspect, when the multiple high-frequency signals are detected in sequence in a preset detection order without interruption, each high-frequency signal detection process includes:

[0021] Initializing the integrated circuit of the controller according to a preset detection sequence so that the integrated circuit matches the corresponding wireless function module;

[0022] If the high-frequency wireless receiver receives the corresponding high-frequency signal within the first preset time, a feedback signal is sent to the controller and the detection process of the target high-frequency signal is ended; if the high-frequency wireless receiver does not receive the corresponding high-frequency signal within the first preset time, the detection process of the corresponding high-frequency signal is ended.

[0023] In a possible implementation manner of the second aspect, after the high-frequency wireless receiver detects a high-frequency signal each time, the high-frequency wireless receiver further includes:

[0024] If the controller receives a switching instruction, the low-frequency wireless transmitter sends a low-frequency signal corresponding to the target wireless function module to the target wireless function module; the switching instruction is used to change the matching object of the controller;

[0025] The high-frequency wireless receiver receives the target high-frequency signal from the target wireless function module within the second preset time, confirms the operating status of the other target wireless function modules and provides feedback; if the high-frequency wireless receiver does not receive the target high-frequency signal from the target wireless function module within the second preset time, the loss of connection information of the other target wireless function modules is fed back.

[0026] In a possible implementation manner of the second aspect, matching the integrated circuit with a corresponding wireless function module specifically includes:

[0027] The low-frequency wireless transmitter sends an authentication random number to the corresponding wireless function module, the controller generates a third calculation result according to the authentication random number, and the corresponding wireless function module generates a fourth calculation result according to the authentication random number;

[0028] If the third calculation result matches the fourth calculation result, the high-frequency signal ID code in the integrated circuit whitelist is rewritten so that the high-frequency signal ID code matches the corresponding high-frequency signal.

[0029] Compared with the prior art, the multi-frequency time-sharing communication system and method provided by the embodiment of the present invention greatly reduces the number of hardware components by using a single high-frequency wireless receiver to replace multiple receivers, thereby reducing the overall hardware procurement and manufacturing costs. When the object matched by the controller needs to be replaced, the present invention provides a clear switching mechanism, which ensures seamless communication switching by sending a switching instruction and confirming the operating status of the new module, avoiding service interruption or delay caused by module switching.

[0030] In addition, the present invention can dynamically adjust the working state of the high-frequency wireless receiver according to different situations, for example, maintaining the polling state when no wake-up command is received, and entering the continuous detection state after receiving the wake-up command, thereby ensuring that the system can operate efficiently under different conditions.

[0031] In summary, compared with the existing technology, the embodiment of the present invention provides a more efficient, economical and secure multi-frequency time-sharing communication system and method. It not only reduces costs by reducing hardware costs and simplifying system structure, but also enhances the functionality and coordination of the system through intelligent management and efficient signal processing, while ensuring the safety and reliability of the system. These improvements are of great significance to the modern automobile industry and can promote the further development of automotive electronic systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a multi-frequency time-division communication system provided by an embodiment of the present invention;

[0033] Figure 2 The present invention provides a flowchart of a multi-frequency time-division communication method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] To solve the above problems, see Figure 1 To achieve the above-mentioned purpose, one embodiment of the present invention provides a multi-frequency time-division communication system, including: a controller 1 and a plurality of wireless function modules 2.

[0036] The controller 1 selects one wireless function module 2 from among the plurality of wireless function modules 2 as a matching object; after receiving the high-frequency signal of the matching object, the controller 1 generates a corresponding control instruction according to the high-frequency signal of the matching object and sends it to other function modules of the vehicle.

[0037] When the controller 1 replaces the matching object, the controller 1 sends a corresponding low-frequency signal to the replaced corresponding wireless function module 2; after the replaced corresponding wireless function module 2 receives the corresponding low-frequency signal, it sends a high-frequency signal to the controller 1; after the controller 1 receives the high-frequency signal of the replaced matching object, it generates a corresponding control instruction according to the high-frequency signal of the replaced matching object and sends it to other functional modules of the vehicle.

[0038] The controller selects a module from multiple wireless function modules 2 as the current matching object. For example, when the vehicle is started, the controller 1 may first select the remote control key module as the matching object. The selected matching object (wireless function module 2) sends a high-frequency signal to the controller 1. For example, the remote control key sends an unlock signal. After receiving the high-frequency signal, the controller 1 parses the signal content and generates corresponding control instructions based on the signal. For example, an instruction to unlock the door is generated based on the unlock signal. The controller 1 sends the generated control instruction to other functional modules of the vehicle (such as the door lock system) and performs corresponding operations. For example, an unlock instruction is sent to the door lock system.

[0039] When the matching object needs to be replaced, the controller 1 sends a low-frequency signal to the new wireless function module 2. For example, when the vehicle needs to be started, the controller 1 may send a low-frequency signal to the start button module. After receiving the low-frequency signal, the new wireless function module 2 sends a high-frequency signal to the controller 1. For example, after receiving the low-frequency signal, the start button module sends a high-frequency signal of a start request. After receiving the new high-frequency signal, the controller 1 generates a new control instruction according to the content of the signal. For example, an instruction to start the engine is generated according to the start request. The controller 1 sends the new control instruction to other functional modules of the vehicle (such as the engine control system) to perform new operations. For example, a start instruction is sent to the engine control system.

[0040] Compared with the prior art, the multi-frequency time-sharing communication system provided by the embodiment of the present invention greatly reduces the number of hardware components by using a single high-frequency wireless receiver to replace multiple receivers, thereby reducing the overall hardware procurement and manufacturing costs. When the object matched by the controller needs to be replaced, the present invention provides a clear switching mechanism, which ensures seamless communication switching by sending a switching instruction and confirming the operating status of the new module, avoiding service interruption or delay caused by module switching.

[0041] Exemplarily, the controller includes a high- and low-frequency transceiver module 10 and a communication module 11; the high- and low-frequency transceiver module 10 includes a low-frequency wireless transmitter 100 and a high-frequency wireless receiver 101, the high-frequency wireless receiver is used to receive several high-frequency signals from different wireless functional modules, and the low-frequency wireless transmitter is used to transmit several low-frequency signals corresponding to the high-frequency signals; the communication module is used to communicate with other functional modules of the vehicle.

[0042] It should be noted that the high- and low-frequency transceiver module 10 includes a high-frequency wireless receiver 101 that can receive high-frequency signals sent by the tire pressure monitoring module and the remote control key, and a low-frequency wireless transmitter 100 that can transmit low-frequency signals to the tire pressure monitoring module; the communication module 11 can be a communication IC (integrated circuit) module such as CAN or LIN or ETH for signal transmission; the controller 1 includes an MCU module that can receive and process high-frequency signals transmitted by the high- and low-frequency transceiver module 10 and can send correct low-frequency signals. Other functional modules of the vehicle include an information display module, which can be an instrument or a central control screen.

[0043] Exemplarily, it also includes a related execution function module, which is communicatively connected to the communication module, and the related execution function module is used to: after receiving the control instruction, execute a corresponding action according to the control instruction.

[0044] The main responsibility of the execution module is to perform corresponding actions according to the content of the instruction after receiving the control instruction from the controller. The execution function module can be a module such as door locks, horns, etc. that involves key and tire pressure information and can participate in decision-making working status. When the controller changes the matching object, the execution module can quickly respond to the new control instruction and perform new actions. For example, during the vehicle startup process, from unlocking the door to starting the engine, the execution module can quickly respond to the controller's instruction conversion to ensure a smooth operation process. The execution module can perform the corresponding action immediately after receiving the control instruction, which improves the real-time performance of the system and minimizes the time difference between user operation and system response.

[0045] In the prior art, the same receiving module is usually used to receive the high-frequency signals of two functional modules. This method is implemented based on the usage scenario. For example, the high-frequency signal of the key is detected before power-on, and after power-on, only the high-frequency signal of the tire pressure feedback is received. At this time, the key is not awakened at a low frequency and high-frequency is not received, which may cause a safety hazard that the legitimate key is no longer in the car after power-on, but the vehicle can be operated normally.

[0046] To do this, see Figure 2 An embodiment of the present application provides a multi-frequency time-division communication method, which is applied to the controller as described above, including:

[0047] If the vehicle is in a power-off state, the high-frequency wireless receiver 101 enters a polling state and switches to a working state according to a preset polling cycle; each time the high-frequency wireless receiver 101 switches to the working state, the high-frequency wireless receiver 101 receives a first high-frequency signal and switches the controller 1 to the working state; each time the controller 1 switches to the working state, the working state of the high-frequency wireless receiver 101 and the working state of the vehicle are controlled according to the vehicle wake-up instruction.

[0048] If the vehicle is in a powered-on state, the high-frequency wireless receiver 101 enters a continuous state, and continuously detects several high-frequency signals in sequence according to a preset detection order; after the high-frequency wireless receiver 101 detects each high-frequency signal, if the controller 1 does not receive a vehicle power-off command, the high-frequency wireless receiver 101 continues to maintain a continuous state; if the controller 1 receives a vehicle power-off command, causing the vehicle to enter a powered-off state, the high-frequency wireless receiver 101 enters a polling state.

[0049] When the vehicle is in the power-off (not powered) mode, since the battery is used at this time, it is very important to maintain the power and consume as little power as possible. Therefore, when the vehicle is not powered on, the high-frequency wireless receiver 101 on the controller 1 enters the polling state, that is, it can wake itself up at the set time, thereby switching to the working state, and detecting whether there is a high-frequency signal ① input from the target wireless function module 2 at this time. If not, it will sleep and wait for the next wake-up when the polling time is met. If the high-frequency signal ① input from the target wireless function module 2 is received when the high-frequency wireless receiver 101 wakes up, the controller will be woken up, thereby switching to the working state, and then it is determined whether to power on the vehicle. If the vehicle wake-up operation is not performed, the high-frequency wireless receiver 101 continues to remain in the polling state and continues to detect the high-frequency signal ①.

[0050] When the vehicle power state is switched to the power-on state, the built-in MCU of the controller 1 will first initialize the high-frequency wireless receiver 101, and write the high-frequency signal ID code in the white list of the IC (integrated circuit) of the controller 1 to match the high-frequency signal ②. The IC continuously queries the high-frequency signal ② in continuous mode. When the controller 1 needs to transmit a low-frequency signal ① to detect the operating status of the functional module and needs to receive the high-frequency signal ①, the MCU will initialize the high-frequency wireless receiver and write the high-frequency signal ID code in the white list of the IC again to match the high-frequency signal ①. After the setting is completed, wait for the high-frequency signal ① to be input. When the high-frequency signal ① is received, first determine whether it exceeds the specified time. If it does not exceed, feedback is given to the controller, and the detection process of the high-frequency signal ① is ended, and the IC is initialized to match the high-frequency signal ②. When the high-frequency signal ① is received or continuously not received and timeout occurs, the high-frequency signal ① detection process is directly ended, and the IC is initialized to match the high-frequency signal ②. When in continuous mode, controller 1 does not need to send low-frequency signal ① to obtain signal feedback of high-frequency signal ①, then it determines whether high-frequency signal ② is received. If high-frequency signal ② is received, it feeds back to controller 1 and determines whether it is ready to power off. If it is not ready to power off, it continues to enter continuous mode to query high-frequency signal ②. If it is ready to power off, it jumps to the Polling mode of power-off mode for low-power monitoring.

[0051] Assume that a vehicle is in a power-off state. At this time, the high-frequency wireless receiver 101 enters a polling state and switches to a working state to listen for signals at regular intervals. When the user presses the unlock button of the remote control key, the remote control key sends a high-frequency signal. The high-frequency wireless receiver 101 wakes up the controller 1 after receiving the signal. The controller 1 generates an unlock command and sends it to the execution module, which unlocks the door. After the vehicle enters the power-on state, the high-frequency wireless receiver 101 enters a continuous detection state and continuously monitors various high-frequency signals. When the user turns off the engine and leaves the vehicle, the controller 1 receives a power-off command, the vehicle enters the power-off state again, and the high-frequency wireless receiver 101 returns to the polling state.

[0052] Through this design of dynamically adjusting the working state of the high-frequency wireless receiver 101, the system can not only effectively save energy and extend battery life, but also improve the response speed, ensure that it can flexibly respond to various signal inputs in different states, and improve the stability and reliability of the system. These technical effects provide users with a more convenient and reliable use experience.

[0053] Exemplarily, each time the controller 1 switches to the working state, the working state of the high-frequency wireless receiver 101 and the working state of the vehicle are controlled according to the vehicle wake-up instruction, specifically including:

[0054] Each time the controller 1 switches to the working state, if the controller 1 does not receive a vehicle wake-up command after the high-frequency wireless receiver 101 receives the first high-frequency signal, the high-frequency wireless receiver 101 continues to maintain the polling state and detects other high-frequency signals in sequence according to a preset detection order; if the controller 1 receives a vehicle wake-up command after the high-frequency wireless receiver receives the first high-frequency signal, the vehicle enters the power-on state, and the high-frequency wireless receiver enters the continuous state.

[0055] The high-frequency wireless receiver 101 wakes itself up at the set time and detects whether there is a high-frequency signal ① input from the target wireless function module 2 at this time. If not, it will sleep and wait for the next wake-up when the polling time is met. If the high-frequency signal ① input from the target wireless function module 2 is received when the high-frequency wireless receiver 101 wakes up, the controller 1 will be woken up, and then it will be determined whether to power on the whole vehicle. If the whole vehicle wake-up operation is not performed, the high-frequency wireless receiver 101 will wake up the controller 1 to initialize the IC to match the high-frequency signal ②. At this time, the controller 1 can continue to sleep, and the high-frequency wireless receiver 101 continues to detect whether there is a high-frequency signal ② input from other target wireless function modules 2 in a polling state. Like the high-frequency signal ①, it performs the judgment operation of whether it is received and whether to wake up.

[0056] Exemplarily, the high-frequency wireless receiver 101 continues to maintain the polling state and detects other high-frequency signals in sequence according to a preset detection order, specifically including:

[0057] The high frequency wireless receiver 101 continues to maintain the polling state, and initializes the integrated circuit of the controller according to the preset detection sequence, so that the integrated circuit matches the corresponding wireless function module;

[0058] Each time the high-frequency wireless receiver 101 switches to the working state, the high-frequency wireless receiver 101 receives the high-frequency signal of the corresponding wireless function module 2 and switches the controller 1 to the working state; each time the controller 1 switches to the working state, the working state of the high-frequency wireless receiver 101 and the working state of the vehicle are controlled according to the vehicle wake-up instruction.

[0059] When the vehicle power state is switched to the power-on state, the MCU will first initialize the high-frequency wireless receiver 101, and write the high-frequency signal ID code in the white list of the IC to match the high-frequency signal X. The IC will continue to query the high-frequency signal X in continuous mode. When the controller 1 needs to transmit the low-frequency signal ③ to detect the operating status of the wireless function module 2 and needs to receive the high-frequency signal ③, the MCU will initialize the high-frequency wireless receiver 101 and write the high-frequency signal ID code in the white list of the IC again to match the high-frequency signal ③. After the setting is completed, wait for the input of the high-frequency signal ③. When the high-frequency signal ③ is received, first determine whether it exceeds the specified time. If it does not exceed, it will be fed back to the controller 1, and the detection process of the high-frequency signal ③ will be ended, and the IC will be initialized to match the high-frequency signal X. When the high-frequency signal ③ is received or continuously not received and timed out, the high-frequency signal ③ detection process will be directly ended, and the IC will be initialized to match the high-frequency signal X. In the next process, the low-frequency signal ④ related process is executed according to the previous round of low-frequency signal ③ process, and the remaining reserved functions are the same. When in continuous mode, controller 1 does not need to send low-frequency signal ③ to obtain signal feedback of high-frequency signal ③, then it determines whether the high-frequency signal X is received. If received, it feeds back to controller 1 and determines whether it is ready to power off. If it is not ready to power off, it continues to enter continuous mode to query the high-frequency signal X. If it is ready to power off, it jumps to the Polling mode of the power-off mode for low-power monitoring.

[0060] Exemplarily, matching the integrated circuit to the corresponding wireless function module 2 specifically includes:

[0061] The low-frequency wireless transmitter sends an authentication random number to the corresponding wireless function module, the controller generates a first calculation result according to the authentication random number, and the corresponding wireless function module generates a second calculation result according to the authentication random number;

[0062] If the first calculation result matches the second calculation result, the high-frequency signal ID code in the integrated circuit whitelist is rewritten so that the high-frequency signal ID code matches the corresponding high-frequency signal.

[0063] Exemplarily, when the plurality of high-frequency signals are detected in sequence in a preset detection order without interruption, the process of detecting the high-frequency signal each time includes:

[0064] The integrated circuit of the controller is initialized according to a preset detection sequence so that the integrated circuit matches the corresponding wireless function module 2.

[0065] If the high-frequency wireless receiver 101 receives the corresponding high-frequency signal within the first preset time, a feedback signal is sent to the controller 1 and the detection process of the target high-frequency signal is ended; if the high-frequency wireless receiver 101 does not receive the corresponding high-frequency signal within the first preset time, the detection process of the corresponding high-frequency signal is ended.

[0066] The low frequency wireless transmitter 100 sends a random number to the corresponding wireless function module. The random number is used for calculation in the authentication process. The controller 1 and the wireless function module 2 independently use the same algorithm to process the authentication random number and obtain a first calculation result and a second calculation result respectively.

[0067] If the first calculation result generated by the controller 1 is the same as the second calculation result generated by the wireless function module 2, the wireless function module 2 is considered to be authentic. If the calculation results match successfully, the high-frequency signal ID code of the wireless function module 2 will be added to the whitelist of the integrated circuit. In this way, when the wireless function module 2 sends a high-frequency signal in the future, the integrated circuit can recognize that it is a signal from an authenticated module and take corresponding actions accordingly.

[0068] This process effectively prevents unauthorized devices from attempting to communicate with the system because it requires the correct authentication random number as well as the correct calculation result. If the data of either party is incorrect, there will be no match, so the whitelist will not be updated, and subsequent high-frequency signal exchanges will not be possible. This method is widely used in fields such as smart door locks and car keyless entry systems to improve the security of the system. In actual applications, more details and technical means will be involved to further enhance the security and robustness of the system.

[0069] Exemplarily, after the high-frequency wireless receiver 101 detects a high-frequency signal, it further includes:

[0070] If the controller 1 receives a switching instruction, the low-frequency wireless transmitter 100 sends a low-frequency signal corresponding to the target wireless function module 2 to the target wireless function module 2; the switching instruction is used to change the matching object of the controller 1.

[0071] Within the second preset time, the high-frequency wireless receiver 101 receives the target high-frequency signal from the target wireless function module 2, confirms the operating status of the other target wireless function modules 2 and provides feedback; if the high-frequency wireless receiver 101 does not receive the target high-frequency signal from the target wireless function module 2 within the second preset time, it provides feedback on the loss of connection information of the other target wireless function modules 2.

[0072] The high frequency wireless receiver 101 is responsible for detecting various high frequency signals. Each time after completing the detection of a high frequency signal, the system enters a standby state and is ready to receive possible switching instructions. If the controller 1 receives a switching instruction, it means that the system needs to change its current matching object, that is, to establish a connection with a different wireless function module 2. According to the switching instruction, the low frequency wireless transmitter 100 will send a specific low frequency signal to the target wireless function module 2. This signal is used to wake up the target module and start a new communication session.

[0073] Within the second preset time after sending the low-frequency signal, the high-frequency wireless receiver 101 waits to receive the target high-frequency signal from the target wireless function module 2. If the target high-frequency signal is received within this time period, it indicates that the target wireless function module 2 is in normal working condition and can continue to perform subsequent operations. If the high-frequency wireless receiver 101 fails to receive the target high-frequency signal within the second preset time, it indicates that there may be a problem with the target wireless function module 2, such as disconnection or failure. At this time, the system will feedback the loss of connection information of the target wireless function module 2.

[0074] Exemplarily, matching the integrated circuit with the corresponding wireless function module specifically includes:

[0075] The low-frequency wireless transmitter sends an authentication random number to the corresponding wireless function module, the controller generates a third calculation result according to the authentication random number, and the corresponding wireless function module generates a fourth calculation result according to the authentication random number;

[0076] If the third calculation result matches the fourth calculation result, the high-frequency signal ID code in the integrated circuit whitelist is rewritten so that the high-frequency signal ID code matches the corresponding high-frequency signal.

[0077] The low frequency wireless transmitter 100 sends an authentication random number (RandomNumber) to the corresponding wireless function module. This random number is used to verify the identity of the module and ensure that only legitimate modules can communicate with the system. The controller 1 generates a third calculation result (for example, through some encryption algorithm or hash function) based on the received authentication random number. The wireless function module 2 generates a fourth calculation result based on the same received authentication random number.

[0078] The controller 1 checks whether the third calculation result is consistent with the fourth calculation result. If the two calculation results match, it means that the identity of the wireless function module 2 has been verified and subsequent operations can be performed. After the match is successful, the controller 1 writes the high-frequency signal ID code of the wireless function module 2 to the white list of the integrated circuit. This ensures that only authenticated high-frequency signal ID codes can be identified and processed.

[0079] By sending the authentication random number and matching the calculation results of both parties, it is ensured that only authenticated wireless function modules can communicate with the system, thus improving the security of the system. Only when the calculation results match, the high-frequency signal ID code will be written to the whitelist to prevent unauthorized modules from accessing.

[0080] It should be noted that the high-frequency signal ID code is used as a unique identifier to ensure that each wireless function module has a unique identification to prevent confusion or misoperation. By flashing the high-frequency signal ID code in the integrated circuit whitelist, the system can dynamically update the information of the authentication module to adapt to different application scenarios and functional requirements. Allow system administrators or users to flexibly configure and update the whitelist content according to actual conditions. Through a strict authentication mechanism, reliable communication between the wireless function module and the system is ensured, reducing failures caused by unauthorized device access.

[0081] Through the above authentication mechanism, the embodiment of the present invention not only improves the security of the system, but also ensures the uniqueness and reliability of the wireless function module. This dynamic matching and updating mechanism makes the system more flexible and adaptable to different application scenarios, while also enhancing the user experience. Through the use of authentication random numbers, the system can effectively prevent the access of unauthorized devices, ensuring the stability and security of the system.

[0082] Compared with the prior art, the multi-frequency time-sharing communication system and method provided by the embodiment of the present invention greatly reduces the number of hardware components by using a single high-frequency wireless receiver to replace multiple receivers, thereby reducing the overall hardware procurement and manufacturing costs. When the object matched by the controller needs to be replaced, the present invention provides a clear switching mechanism, which ensures seamless communication switching by sending a switching instruction and confirming the operating status of the new module, avoiding service interruption or delay caused by module switching.

[0083] In addition, the present invention can dynamically adjust the working state of the high-frequency wireless receiver according to different situations, for example, maintaining the polling state when no wake-up command is received, and entering the continuous detection state after receiving the wake-up command, thereby ensuring that the system can operate efficiently under different conditions.

[0084] In summary, compared with the existing technology, the embodiment of the present invention provides a more efficient, economical and secure multi-frequency time-sharing communication system and method. It not only reduces costs by reducing hardware costs and simplifying system structure, but also enhances the functionality and coordination of the system through intelligent management and efficient signal processing, while ensuring the safety and reliability of the system. These improvements are of great significance to the modern automobile industry and can promote the further development of automotive electronic systems.

[0085] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A multi-frequency time-division communication system, characterized in that: include: Controller and several wireless function modules; The controller selects one wireless function module from the plurality of wireless function modules as a matching object; After receiving the high-frequency signal of the matching object, generating a corresponding control instruction according to the high-frequency signal of the matching object and sending it to other functional modules of the vehicle; When the controller replaces the matching object, the controller sends a corresponding low-frequency signal to the replaced corresponding wireless function module; after receiving the corresponding low-frequency signal, the replaced corresponding wireless function module sends a high-frequency signal to the controller; after receiving the high-frequency signal of the replaced matching object, the controller generates a corresponding control instruction according to the high-frequency signal of the replaced matching object and sends it to other functional modules of the vehicle.

2. A multi-frequency time-division communication system as claimed in claim 1, characterized in that: The controller includes a high- and low-frequency transceiver module and a communication module; the high- and low-frequency transceiver module includes a low-frequency wireless transmitter and a high-frequency wireless receiver, the high-frequency wireless receiver is used to receive several high-frequency signals from different wireless functional modules, and the low-frequency wireless transmitter is used to transmit several low-frequency signals corresponding to the high-frequency signals; the communication module is used to communicate with other functional modules of the vehicle.

3. A multi-frequency time-division communication system as claimed in claim 2, characterized in that: It also includes a related execution function module, which is communicatively connected to the communication module, and is used for: after receiving the control instruction, executing a corresponding action according to the control instruction.

4. A multi-frequency time-division communication method, characterized in that: Applicable to the controller as claimed in claim 2 or 3, comprising: If the vehicle is in a power-off state, the high-frequency wireless receiver enters a polling state and switches to a working state according to a preset polling cycle; each time the high-frequency wireless receiver switches to a working state, the high-frequency wireless receiver receives a first high-frequency signal and switches the controller to a working state; each time the controller switches to a working state, the working state of the high-frequency wireless receiver and the working state of the vehicle are controlled according to a vehicle wake-up instruction; If the vehicle is in a powered-on state, the high-frequency wireless receiver enters a continuous state, and continuously detects several high-frequency signals in sequence according to a preset detection order; after the high-frequency wireless receiver detects each high-frequency signal, if the controller does not receive a vehicle power-off command, the high-frequency wireless receiver continues to maintain a continuous state; if the controller receives a vehicle power-off command, causing the vehicle to enter a power-off state, the high-frequency wireless receiver enters a polling state.

5. A multi-frequency time-division communication method as claimed in claim 4, characterized in that: Each time the controller switches to the working state, the working state of the high-frequency wireless receiver and the working state of the vehicle are controlled according to the vehicle wake-up instruction, specifically including: Each time the controller switches to the working state, if the controller does not receive a vehicle wake-up instruction after the high-frequency wireless receiver receives the first high-frequency signal, the high-frequency wireless receiver continues to maintain the polling state and detects other high-frequency signals in sequence according to a preset detection order; if the controller receives a vehicle wake-up instruction after the high-frequency wireless receiver receives the first high-frequency signal, causing the vehicle to enter the power-on state, and the high-frequency wireless receiver enters the continuous state.

6. A multi-frequency time-division communication method as claimed in claim 5, characterized in that: The high-frequency wireless receiver continues to maintain the polling state and detects other high-frequency signals in sequence according to a preset detection order, specifically including: The high-frequency wireless receiver continues to maintain a polling state, and initializes the integrated circuit of the controller according to a preset detection sequence, so that the integrated circuit matches the corresponding wireless function module; Each time the high-frequency wireless receiver switches to the working state, the high-frequency wireless receiver receives the high-frequency signal of the corresponding wireless function module and switches the controller to the working state; each time the controller switches to the working state, the working state of the high-frequency wireless receiver and the working state of the vehicle are controlled according to the vehicle wake-up instruction.

7. A multi-frequency time-division communication method as claimed in claim 6, characterized in that: The step of matching the integrated circuit with the corresponding wireless function module specifically includes: The low-frequency wireless transmitter sends an authentication random number to the corresponding wireless function module, the controller generates a first calculation result according to the authentication random number, and the corresponding wireless function module generates a second calculation result according to the authentication random number; If the first calculation result matches the second calculation result, the high-frequency signal ID code in the integrated circuit whitelist is rewritten so that the high-frequency signal ID code matches the corresponding high-frequency signal.

8. A multi-frequency time-division communication method as claimed in claim 4, characterized in that: When the plurality of high-frequency signals are detected in sequence in a preset detection order without interruption, each high-frequency signal detection process includes: Initializing the integrated circuit of the controller according to a preset detection sequence so that the integrated circuit matches the corresponding wireless function module; If the high-frequency wireless receiver receives the corresponding high-frequency signal within the first preset time, a feedback signal is sent to the controller and the detection process of the target high-frequency signal is ended; if the high-frequency wireless receiver does not receive the corresponding high-frequency signal within the first preset time, the detection process of the corresponding high-frequency signal is ended.

9. A multi-frequency time-division communication method as claimed in claim 4, characterized in that: After the high-frequency wireless receiver detects a high-frequency signal, it also includes: If the controller receives a switching instruction, the low-frequency wireless transmitter sends a low-frequency signal corresponding to the target wireless function module to the target wireless function module; the switching instruction is used to change the matching object of the controller; The high-frequency wireless receiver receives the target high-frequency signal from the target wireless function module within the second preset time, confirms the operating status of the other target wireless function modules and provides feedback; if the high-frequency wireless receiver does not receive the target high-frequency signal from the target wireless function module within the second preset time, the loss of connection information of the other target wireless function modules is fed back.

10. A multi-frequency time-division communication method as claimed in claim 8, characterized in that: Matching the integrated circuit with the corresponding wireless function module specifically includes: The low-frequency wireless transmitter sends an authentication random number to the corresponding wireless function module, the controller generates a third calculation result according to the authentication random number, and the corresponding wireless function module generates a fourth calculation result according to the authentication random number; If the third calculation result matches the fourth calculation result, the high-frequency signal ID code in the integrated circuit whitelist is rewritten so that the high-frequency signal ID code matches the corresponding high-frequency signal.

Images