A vehicle bluetooth key low power consumption control method and device

Abstract

The application discloses a kind of vehicle bluetooth key low-power consumption control method and device, applied to vehicle bluetooth key system, the vehicle bluetooth key system includes bluetooth key, bluetooth master module and multiple bluetooth slave modules located in the four around of vehicle, this method includes: according to the state information of the bluetooth key, the state information of the vehicle, and the relative distance between the bluetooth key and the vehicle, determine corresponding power consumption management strategy;According to the power consumption management strategy, the working state of at least one of the bluetooth key, the bluetooth master module and the bluetooth slave module is controlled.The method breaks the limitation of traditional scheme that bluetooth key or vehicle unilateral energy saving, through the fusion of multi-dimensional information for collaborative decision-making, energy consumption accurately matches actual scene demand.The global collaborative mechanism fundamentally solves the contradiction between long standby and fast response, while significantly prolonging the battery life of bluetooth key, guarantees smooth, reliable user experience.

Description

Technical Field

[0001] This invention relates to the field of intelligent vehicle control technology, and in particular to a low-power control method and device for vehicle Bluetooth keys. Background Technology

[0002] Currently, with the continuous improvement of automotive intelligence, keyless entry and start systems based on Bluetooth Low Energy (BLE) communication technology are widely used due to their convenience. Compared with traditional radio frequency remote keys, Bluetooth keys can achieve more intelligent passive entry and passive start functions, greatly improving the user experience.

[0003] However, when Bluetooth technology is applied to battery-powered physical keys that require long standby times, power management becomes a core technological challenge. Physical Bluetooth keys need to maintain extremely low static power consumption for the vast majority of the time to ensure a battery life of several months to several years, while simultaneously being able to be quickly and reliably woken up and complete a highly secure, low-latency interaction with the vehicle the moment the user needs to use it. This places extremely high demands on the collaborative power management between the key and the vehicle.

[0004] Existing low-power solutions primarily attempt to reduce power consumption by optimizing the sensor strategy of the key itself or by adding simple time control mechanisms to connection management. However, such solutions often have limitations: First, they fail to plan power consumption from the perspective of the overall "vehicle-key" collaboration system, ignoring the power consumption of the vehicle's Bluetooth module and the impact of the vehicle's own status on the overall power consumption; second, the strategies are relatively simplistic, failing to finely differentiate between the multi-dimensional and complex scenarios such as the user carrying the key while moving, stationary, resting in the vehicle, and transporting the vehicle, which can easily lead to excessive power consumption in some scenarios, while the overly conservative strategies in other scenarios negatively impact the user experience.

[0005] Therefore, there is an urgent need for a low-power management strategy for Bluetooth keys that can deeply integrate vehicle status, key status, and relative location information to achieve multi-scenario adaptation and system-level collaboration, so as to provide a seamless and smooth user experience while ensuring the ultimate battery life. Summary of the Invention

[0006] To achieve global collaborative energy saving between the vehicle and the key, and to extend the key battery life while ensuring a seamless user experience, this invention provides a low-power control method and device for vehicle Bluetooth keys.

[0007] In a first aspect, embodiments of the present invention provide a low-power control method for a vehicle Bluetooth key, applied to a vehicle Bluetooth key system. The vehicle Bluetooth key system includes a Bluetooth key, a Bluetooth master module, and multiple Bluetooth slave modules located around the vehicle. The method may include:

[0008] Based on the status information of the Bluetooth key, the status information of the vehicle, and the relative distance between the Bluetooth key and the vehicle, a corresponding power consumption management strategy is determined. According to the power consumption management strategy, control the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module.

[0009] In one or more optional embodiments of this application, the Bluetooth key is equipped with a motion sensor, and the step of determining a corresponding power management strategy based on the state information of the Bluetooth key, the state information of the vehicle, and the relative distance between the Bluetooth key and the vehicle includes: If the relative distance and the vehicle's state information indicate that the vehicle is stationary and the Bluetooth key is moving, then the corresponding power management strategy is determined to be a preset dynamic management strategy. If the relative distance indicates that the Bluetooth key and the vehicle are in a relatively stationary state, then the corresponding power consumption management strategy is determined to be the preset stationary management strategy. If the vehicle's status information indicates that the vehicle is in a driving state, then the corresponding power consumption management strategy is determined to be the preset driving management strategy. If the vehicle's status information indicates that the vehicle is in a special state, then the corresponding power consumption management strategy is determined to be a preset special management strategy; wherein, the special state includes factory mode and transportation mode; If the relative distance and the vehicle's state information indicate that the Bluetooth key is inside the vehicle and both the Bluetooth key and the vehicle are stationary, then the corresponding power management strategy is determined to be the preset sleep management strategy. If the status information of the Bluetooth key indicates that the Bluetooth key is woken up by the motion sensor, then the corresponding power management strategy is determined to be the preset wake-up management strategy. If the vehicle's status information indicates that the vehicle is in a remote parking state, then the corresponding power consumption management strategy is determined to be the preset intelligent driving management strategy.

[0010] In one or more optional embodiments of this application, controlling the operating state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power management strategy includes: If the power consumption management strategy is the preset dynamic management strategy, and if the relative distance is greater than the first distance threshold, then control the Bluetooth main module to connect with the Bluetooth key and enter the first positioning mode; If the relative distance is less than or equal to the first distance threshold, then the Bluetooth master module and the plurality of Bluetooth slave modules are all connected to the Bluetooth key and enter the second positioning mode; wherein, the positioning accuracy of the second positioning mode is higher than that of the first positioning mode; If the startup time of the second positioning mode exceeds the first time threshold, the connection between the plurality of Bluetooth slave modules and the Bluetooth key is disconnected, and the first positioning mode is entered. or, If the startup time of the second positioning mode exceeds the first time threshold, then based on the positioning information of the Bluetooth key obtained in the second positioning mode, the connection between part of the Bluetooth slave module and the Bluetooth key is disconnected, and the third positioning mode is entered; wherein, the positioning accuracy of the third positioning mode is lower than that of the second positioning mode and higher than that of the first positioning mode.

[0011] In one or more optional embodiments of this application, controlling the operating state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power management strategy includes: If the power consumption management strategy is the preset static management strategy, and if the relative distance is greater than the first distance threshold, then control the Bluetooth main module to connect with the Bluetooth key and enter the first positioning mode; If the vehicle's status information indicates that the vehicle has been in a dormant state for a second time threshold, then the connection between the Bluetooth master module and the Bluetooth key is disconnected.

[0012] In one or more optional embodiments of this application, controlling the operating state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power management strategy includes: If the power consumption management strategy is the preset driving management strategy, and if the vehicle's driving speed is greater than or equal to a preset speed threshold, then only the Bluetooth master module is controlled to connect to the Bluetooth key, and the communication interval between the Bluetooth master module and the Bluetooth key is adjusted to a preset energy-saving interval.

[0013] If the power consumption management strategy is the preset special management strategy, then only the Bluetooth master module is controlled to connect with the Bluetooth key, and the communication interval between the Bluetooth master module and the Bluetooth key is adjusted to the preset energy-saving interval.

[0014] In one or more optional embodiments of this application, controlling the operating state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power management strategy includes: If the power management strategy is the preset sleep management strategy, and if the vehicle's state information indicates that the vehicle has maintained a stationary state for a third time threshold, then the connection between the Bluetooth master module and the Bluetooth key is disconnected.

[0015] In one or more optional embodiments of this application, the Bluetooth key is configured with a positioning chip, and controlling the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power management strategy includes: If the power consumption management strategy is the preset wake-up management strategy, then the current distance between the Bluetooth key and the vehicle is determined based on the positioning chip; If the current distance is greater than the second distance threshold, the Bluetooth key is controlled not to initiate a broadcast and remains in a sleep state; wherein the second distance threshold is greater than the first distance threshold.

[0016] In one or more optional embodiments of this application, controlling the operating state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power management strategy includes: If the power consumption management strategy is the preset intelligent driving management strategy, then the Bluetooth main module is controlled to connect with the Bluetooth key and enter the first positioning mode.

[0017] In one or more optional embodiments of this application, the following further includes: If the vehicle or the Bluetooth key detects a preset activation action, it controls the Bluetooth master module and the multiple Bluetooth slave modules to connect to the Bluetooth key and enter the second positioning mode.

[0018] Secondly, embodiments of the present invention provide a low-power control device for a vehicle Bluetooth key, which may include: The determining module is used to determine the corresponding power consumption management strategy based on the status information of the Bluetooth key, the status information of the vehicle, and the relative distance between the Bluetooth key and the vehicle. The control module is used to control the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy.

[0019] Thirdly, embodiments of the present invention provide a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the vehicle Bluetooth key low-power control method as described above.

[0020] Fourthly, embodiments of the present invention provide a computer program product, including a computer program / instruction, which, when executed by a processor, implements the vehicle Bluetooth key low-power control method as described above.

[0021] Fifthly, embodiments of the present invention provide a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the vehicle Bluetooth key low-power control method as described above.

[0022] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following: This invention provides a low-power control method for vehicle Bluetooth keys. This method achieves systematic and intelligent low-power management by determining a power management strategy based on the Bluetooth key's state, vehicle state, and relative distance, and controlling the operating state of at least one of the Bluetooth key, Bluetooth master module, and Bluetooth slave module accordingly. Its significant advantages lie in breaking the limitations of traditional solutions that rely solely on energy saving by the Bluetooth key or vehicle. By integrating multi-dimensional information for collaborative decision-making, energy consumption is precisely matched to the needs of the actual scenario. This global collaborative mechanism fundamentally solves the contradiction between long standby time and fast response, significantly extending the Bluetooth key's battery life while ensuring a smooth and reliable user experience.

[0023] To achieve global collaborative energy saving between the vehicle and the key, and to extend the key battery life while ensuring a seamless user experience. Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 A flowchart illustrating the vehicle Bluetooth key low-power control method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram showing the layout of each module of the vehicle Bluetooth key system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a vehicle Bluetooth key low-power control device provided in an embodiment of the present invention. Detailed Implementation

[0026] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0027] The inventors discovered that existing low-power solutions primarily attempt to reduce power consumption by optimizing the sensor strategy of the key itself or adding simple time control mechanisms to connection management. However, such solutions often have limitations: firstly, they fail to plan power consumption from the perspective of the overall "vehicle-key" collaboration system, ignoring the energy consumption of the vehicle's Bluetooth module and the impact of the vehicle's own state on the overall power consumption; secondly, the strategies are relatively simplistic, failing to finely differentiate between multi-dimensional and complex scenarios such as the user carrying the key while moving, stationary, resting in the vehicle, and transporting the vehicle, which can easily lead to excessive power consumption in some scenarios, while the overly conservative strategies negatively impact the user experience in other scenarios. Based on this, the inventors, through further research and development, created this invention, providing a low-power control method and device for vehicle Bluetooth keys.

[0028] Example 1 Embodiment 1 of the present invention provides a low-power control method for a vehicle Bluetooth key, applied to a vehicle Bluetooth key system. The vehicle Bluetooth key system includes a Bluetooth key, a Bluetooth master module, and multiple Bluetooth slave modules located around the vehicle. (Refer to...) Figure 1 As shown, the method may include the following steps S101-S102: S101: Determine the corresponding power management strategy based on the status information of the Bluetooth key, the status information of the vehicle, and the relative distance between the Bluetooth key and the vehicle.

[0029] S102: According to the power consumption management strategy, control the working state of at least one of the Bluetooth key, Bluetooth master module and Bluetooth slave module.

[0030] This invention provides a low-power control method for vehicle Bluetooth keys. This method achieves systematic and intelligent low-power management by determining a power management strategy based on the Bluetooth key's state, vehicle state, and relative distance, and controlling the operating state of at least one of the Bluetooth key, Bluetooth master module, and Bluetooth slave module accordingly. Its significant advantages lie in breaking the limitations of traditional solutions that rely solely on energy saving by the Bluetooth key or vehicle. By integrating multi-dimensional information for collaborative decision-making, energy consumption is precisely matched to the needs of the actual scenario. This global collaborative mechanism fundamentally solves the contradiction between long standby time and fast response, significantly extending the Bluetooth key's battery life while ensuring a smooth and reliable user experience.

[0031] To facilitate understanding by those skilled in the art, the vehicle Bluetooth key system will be described in detail below with reference to the accompanying drawings. (Refer to...) Figure 2 As shown, Figure 2 This is a schematic diagram showing the layout of the various modules of the vehicle Bluetooth key system provided in this embodiment of the invention. It includes a Bluetooth master module located inside the vehicle, four Bluetooth slave modules, and a physical Bluetooth key carried by the user.

[0032] The Bluetooth master module is located on top of the interior reading light. This position is close to the vehicle's geometric center and has minimal signal obstruction, allowing it to act as a central control node to establish a master connection with the Bluetooth key and coordinate the location calculations of the slave modules. The four Bluetooth slave modules are respectively located in the front bumper, rear bumper, and left and right rearview mirrors.

[0033] This surround-sound arrangement provides coverage of the vehicle's surrounding space, enabling the vehicle's Bluetooth key system to measure the angle of arrival from Bluetooth signals from multiple directions. This allows for precise positioning of the physical Bluetooth key, determining whether it is located outside, inside, at the front, rear, or to the side of the vehicle. The physical Bluetooth key, as the system's terminal device, incorporates a Bluetooth chip, microcontroller, and motion sensors, and may optionally integrate a positioning chip, such as a GPS chip. The Bluetooth key is responsible for transmitting Bluetooth signals, responding to vehicle commands, and maintaining a very low-power sleep state when not in use.

[0034] In step S101 above, a corresponding power management strategy is determined based on the status information of the Bluetooth key, the status information of the vehicle, and the relative distance between the Bluetooth key and the vehicle. The Bluetooth key is equipped with a motion sensor. Specifically, this includes the following steps S1011-S1017: S1011: If the relative distance and vehicle state information indicate that the vehicle is stationary and the Bluetooth key is moving, then the corresponding power management strategy is determined to be the preset dynamic management strategy.

[0035] Specifically, it could be as follows: First, determine that the vehicle is stationary based on its status information, such as its speed being zero and its gear being in Park (P). Simultaneously, the vehicle's Bluetooth master module continuously monitors the relative distance to the Bluetooth key. If this distance value changes continuously within a certain time window, it indicates that the Bluetooth key is in motion.

[0036] Based on the combined determination of the vehicle being stationary and the relative distance continuously changing, the corresponding power consumption management strategy is marked as the preset dynamic management strategy.

[0037] The relative distance is obtained by the following method: the Bluetooth master module periodically receives the broadcast signal sent by the key and measures its signal strength, and estimates the approximate straight-line distance between the two in real time based on the preset signal attenuation model.

[0038] S1012: If the relative distance indicates that the Bluetooth key and the vehicle are in a relatively stationary state, then the corresponding power consumption management strategy is determined to be the preset stationary management strategy.

[0039] Specifically, this could be achieved by firstly, the vehicle's status information indicating that it is stationary, for example, with its speed at zero and the gear in Park (P). Simultaneously, the vehicle's Bluetooth master module continuously monitors the relative distance between itself and the Bluetooth key. If this distance remains stable within a certain time window, with fluctuations less than a preset threshold—for example, if the distance consistently remains around 5 meters for 10 minutes, with fluctuations not exceeding ±1 meter—it indicates that the Bluetooth key and the vehicle are relatively stationary.

[0040] Based on the combined determination of vehicle stationary and relative distance stability, the corresponding power management strategy is marked as the preset stationary management strategy.

[0041] The method for obtaining the relative distance is consistent with that described in S1011 above.

[0042] S1013: If the vehicle's status information indicates that the vehicle is in a driving state, then the corresponding power consumption management strategy is determined to be the preset driving management strategy.

[0043] Specifically, it can be determined that the vehicle is in motion based on status information provided by the vehicle bus or vehicle controller, such as a continuously greater than zero speed and the gear being in D or R. In this case, regardless of the relative distance between the Bluetooth key and the vehicle, such as whether the key is placed in the cup holder inside the car or carried by the user, the current core scenario is determined to be a moving vehicle.

[0044] Based on the primary determination that the vehicle is in motion, the corresponding power management strategy is marked as the preset driving management strategy.

[0045] S1014: If the vehicle's status information indicates that the vehicle is in a special state, then the corresponding power management strategy is determined to be the preset special management strategy. The special states include factory mode and transportation mode.

[0046] Specifically, the vehicle's status information may include a special mode identifier written by the manufacturing execution system or dealer management system. When this identifier is read as factory mode or transportation mode, it indicates that the vehicle is in the pre-shipment assembly and testing stage or the pre-sale logistics and warehousing stage. In this state, the conventional user-invisible entry function is not necessary. Based on the determination that the vehicle is in a special state, the corresponding power consumption management strategy is marked as a preset special management strategy.

[0047] S1015: If the relative distance and vehicle status information indicate that the Bluetooth key is inside the vehicle and both the Bluetooth key and the vehicle are stationary, then the corresponding power management strategy is determined to be the preset sleep management strategy.

[0048] Specifically, this could be achieved by first verifying that the vehicle's status information indicates it is stationary, for example, its speed is zero and it is in Park (P) gear. Simultaneously, through precise positioning via the collaborative work of the Bluetooth master module and multiple slave modules, it is determined that the Bluetooth key's coordinates are within the physical boundaries defined by the vehicle's cabin outline. Furthermore, if the Bluetooth key's coordinates do not change significantly within a certain timeframe, then the Bluetooth key is confirmed to be stationary.

[0049] Based on the combined determination that the Bluetooth key is located inside the vehicle and both the vehicle and the Bluetooth key are stationary, the corresponding power management strategy is marked as the preset sleep management strategy.

[0050] S1016: If the status information of the Bluetooth key indicates that the Bluetooth key is woken up by the motion sensor, then the corresponding power management strategy is determined to be the preset wake-up management strategy.

[0051] Specifically, the Bluetooth key's microcontroller, while in deep sleep mode, can be woken up by an interrupt signal generated by its built-in motion sensor detecting a change in acceleration. Once awakened, the Bluetooth key reports a status message to the vehicle via its Bluetooth chip, including a "wake-up by motion sensor" flag. Upon receiving this specific status message, the vehicle, based on the determination that the Bluetooth key was unexpectedly woken up by the motion sensor, marks the corresponding power management strategy as the preset wake-up management strategy. This strategy aims to distinguish between unintentional key wake-ups caused by the user's daily activities (such as walking or shaking a backpack) and intentional wake-ups by the user intending to wake the vehicle.

[0052] S1017: If the vehicle status information indicates that the vehicle is in remote parking mode, then the corresponding power consumption management strategy is determined to be the preset intelligent driving management strategy.

[0053] Specifically, the vehicle's status information could indicate that it is performing Remote Parking Assist (RPA) functionality, for example, by receiving a parking command from a smart key or mobile terminal, and the automatic control unit has taken over the steering, gear shifting, and drive systems. In this state, the vehicle is in a low-speed automatic movement process.

[0054] Based on the determination that the vehicle is in remote parking mode, the corresponding power management strategy is marked as the preset intelligent driving management strategy. This strategy mainly considers that the key positioning requirements during autonomous vehicle movement differ from those in manual driving scenarios.

[0055] In step S102 above, the operating state of at least one of the Bluetooth key, Bluetooth master module, and Bluetooth slave module is controlled according to the power management strategy. Specifically, this includes the following steps S1021-S1027: S1021: If the power management strategy is a preset dynamic management strategy, the specific steps include the following: S10211-S10213: S10211: If the relative distance is greater than the first distance threshold, control the Bluetooth main module to connect with the Bluetooth key and enter the first positioning mode.

[0056] Specifically, the first distance threshold can be set to 20 meters, for example. When the relative distance is consistently greater than the first distance threshold, it indicates that the user is still far away. At this time, only the Bluetooth master module on the vehicle side maintains a Bluetooth connection with the Bluetooth key, and a first positioning mode is adopted. In this first positioning mode, the Bluetooth master module mainly relies on the strength of the received Bluetooth key broadcast signal to estimate the distance, in order to maintain a minimum connection and coarse ranging, thereby achieving basic connection maintenance and low power consumption operation under long-distance conditions.

[0057] S10212: If the relative distance is less than or equal to the first distance threshold, then control the Bluetooth master module and multiple Bluetooth slave modules to connect to the Bluetooth key and enter the second positioning mode. The positioning accuracy of the second positioning mode is higher than that of the first positioning mode.

[0058] Specifically, when the relative distance detected enters a first distance threshold (e.g., 20 meters), it indicates that the user carrying the Bluetooth key has entered the vehicle's arrival area. At this time, the Bluetooth master module on the vehicle control side starts and coordinates all (e.g., four) Bluetooth slave modules, ensuring that all Bluetooth modules establish or maintain a connection with the Bluetooth key and collaboratively enter a second positioning mode. In this second positioning mode, the Bluetooth master module and each Bluetooth slave module calculate the precise two-dimensional or three-dimensional coordinates and real-time distance of the Bluetooth key using a polygonal positioning algorithm by measuring the angle of arrival of the Bluetooth key signal, achieving high-precision positioning and supporting seamless operations such as automatic door unlocking.

[0059] S10213: If the startup time of the second positioning mode exceeds the first time threshold, disconnect the connection between multiple Bluetooth slave modules and the Bluetooth key, and enter the first positioning mode.

[0060] or, If the startup time of the second positioning mode exceeds the first time threshold, the connection between part of the Bluetooth slave module and the Bluetooth key will be disconnected based on the positioning information of the Bluetooth key obtained in the second positioning mode, and the system will enter the third positioning mode. The positioning accuracy of the third positioning mode is lower than that of the second positioning mode but higher than that of the first positioning mode.

[0061] Specifically, the first time threshold can be set to 5 minutes, for example. If the second positioning mode continues to run for more than 5 minutes within the first distance threshold (e.g., 20 meters) of the Bluetooth key, but does not trigger any vehicle operation such as unlocking, it is assumed that the user may have only been passing by with the Bluetooth key or briefly stayed near the vehicle, without any immediate intention to use the vehicle.

[0062] At this point, all Bluetooth slave modules can be disconnected from the Bluetooth key, reverting to the first positioning mode where only the Bluetooth master module maintains the connection and performs coarse ranging, in order to save power consumption of the Bluetooth slave modules.

[0063] Alternatively, based on the precise coordinates obtained from the second positioning mode, if it is determined that the Bluetooth key is stably located in a specific local area of ​​the vehicle for a long time (e.g., always near the rear of the vehicle), then only the Bluetooth slave modules unrelated to that area can be disconnected (e.g., the front bumper and rearview mirror modules can be disconnected), while only the Bluetooth slave modules related to that area (e.g., the rear bumper module can be retained) continue to work together, entering a third positioning mode that is between high-precision omnidirectional positioning and low-precision unidirectional ranging. This further reduces system power consumption while maintaining a certain positioning capability for that area.

[0064] S1022: If the power management strategy is the preset static management strategy, the specific steps are as follows: S10221-S10222: S10221: If the relative distance is greater than the first distance threshold, control the Bluetooth main module to connect with the Bluetooth key and enter the first positioning mode.

[0065] Specifically, under a preset stationary management strategy, when the relative distance between the Bluetooth key and the vehicle is detected to be greater than a first distance threshold (e.g., 20 meters), it indicates that although the Bluetooth key is relatively stationary, it is located at a considerable distance from the vehicle. At this time, the control Bluetooth master module maintains a connection with the Bluetooth key and remains in a first positioning mode. In this mode, the Bluetooth master module communicates with the Bluetooth key at a low frequency and performs coarse distance monitoring based on signal strength, aiming to maintain the connection link with minimal power consumption in case the vehicle needs to actively search for the Bluetooth key or for subsequent user operations.

[0066] S10222: If the vehicle status information indicates that the vehicle has been in a dormant state for a period of time that is two time thresholds, then disconnect the connection between the Bluetooth master module and the Bluetooth key.

[0067] Specifically, the vehicle entering a sleep state can be indicated by vehicle bus signals, such as controllers entering low-power mode, doors being locked, and no load activation. When this sleep state is detected and continues for a second time threshold (e.g., 5 minutes), the current scenario is determined to be a long-term, unused period where both the vehicle and the Bluetooth key are stationary. At this time, to maximize system power saving, the control Bluetooth master module actively sends a custom disconnect command to the Bluetooth key, subsequently disconnecting the Bluetooth connection with the Bluetooth key. Upon receiving this command, the Bluetooth key will also stop automatic broadcasting and enter a deep sleep state until its motion sensor is triggered or a preset activation action is detected.

[0068] S1023: If the power management strategy is the preset driving management strategy, and if the vehicle's driving speed is greater than or equal to the preset speed threshold, then only the Bluetooth master module is controlled to connect to the Bluetooth key, and the communication interval between the Bluetooth master module and the Bluetooth key is adjusted to the preset energy-saving interval.

[0069] Specifically, the preset speed threshold can be set to, for example, 3 km / h. When the vehicle's speed is greater than or equal to the preset speed threshold, it indicates that the vehicle is moving. In this scenario, the preset driving management strategy is executed.

[0070] First, all Bluetooth slave modules on the vehicle are put into a shutdown or deep sleep state, disabling their positioning function. Then, only the connection between the Bluetooth master module and the Bluetooth key is maintained, and the Bluetooth connection interval between them is adjusted from the shorter interval during normal interaction (e.g., several hundred milliseconds) to a longer preset energy-saving interval (e.g., 2 seconds). By disabling the high-power precision positioning function and significantly reducing the frequency of connection maintenance, overall system power consumption is optimized during vehicle operation.

[0071] S1024: If the power management strategy is a preset special management strategy, then only the connection between the Bluetooth master module and the Bluetooth key is controlled, and the communication interval between the Bluetooth master module and the Bluetooth key is adjusted to the preset energy-saving interval.

[0072] Specifically, when the vehicle is in factory mode or transportation mode, a preset special management strategy can be implemented. Under this strategy, all Bluetooth slave modules are controlled to disable their positioning and broadcasting functions. At the same time, similar to step S1023 above, only the basic connection between the Bluetooth master module and the Bluetooth key is maintained, and the communication interval of this connection is adjusted to a preset energy-saving interval (e.g., 2 seconds).

[0073] This approach ensures that during long-term non-user use phases such as vehicle production, quality inspection, transportation, and warehousing, the basic link between the Bluetooth key and the vehicle can be maintained with extremely low power consumption, avoiding the need for complex re-matching due to complete disconnection, while maximizing energy savings.

[0074] S1025: If the power management strategy is the preset sleep management strategy, and if the vehicle's status information indicates that the vehicle has maintained a stationary state for a third time threshold, then disconnect the connection between the Bluetooth master module and the Bluetooth key.

[0075] Specifically, the third time threshold can be set to 15 minutes, for example. When the preset hibernation management strategy is executed and the vehicle is detected to be continuously stationary (e.g., vehicle speed is zero, gear is P, engine is off) for a period of time, it is determined that the user has been resting in the car with the Bluetooth key for a long time and has no intention of operating it.

[0076] At this point, to conserve power, the control Bluetooth master module sends a custom disconnect command to the Bluetooth key, and then actively disconnects the Bluetooth connection with the Bluetooth key. Upon receiving this command, the Bluetooth key also enters a deep sleep state. In this state, the Bluetooth key only retains minimum power consumption detection of its physical buttons and motion sensors, and no longer actively broadcasts Bluetooth information until it is actively woken up by the user, such as when the motion sensor is triggered or a preset activation action is detected.

[0077] S1026: If the power management strategy is a preset wake-up management strategy. The Bluetooth key is equipped with a positioning chip. Specifically, this includes the following steps S10261-S10262: S10261: Determine the current distance between the Bluetooth key and the vehicle based on the positioning chip.

[0078] Specifically, the positioning chip can be configured as a GPS positioning chip, corresponding to GPS. When the Bluetooth key is woken up by its built-in motion sensor, the corresponding module of the positioning chip is activated to obtain its own real-time latitude and longitude coordinates. At the same time, the Bluetooth key reads the vehicle's position coordinates (latitude and longitude) from its non-volatile memory, either pre-stored or obtained during the last communication. By calculating the geometric straight-line distance between these two coordinates, the current absolute distance between the Bluetooth key and the vehicle is determined.

[0079] It is important to note that the current distance obtained here based on the positioning chip is an absolute, large-scale geographic distance, and its accuracy and availability are affected by satellite signal conditions. In contrast, the relative distance obtained by the Bluetooth master module in the above steps through signal strength or angle of arrival is a relative, small-scale distance based on wireless signal characteristics, which is specifically used for high-frequency interaction and positioning scenarios at close range around the vehicle.

[0080] S10262: If the current distance is greater than the second distance threshold, control the Bluetooth key not to initiate a broadcast and keep it in sleep mode. The second distance threshold is greater than the first distance threshold.

[0081] Specifically, the second distance threshold can be set to a large value, such as 100 meters. When the calculated current absolute distance is greater than 100 meters, it is determined that the Bluetooth key was mistakenly awakened due to the user's daily activities and is too far from the vehicle to be used in the short term. At this time, the Bluetooth communication chip controlling the Bluetooth key does not initiate any broadcast or connection attempt, and controls its microprocessor and the corresponding module of the positioning chip to immediately return to a deep sleep state. This mechanism effectively avoids the Bluetooth key from continuously performing high-power Bluetooth broadcasts and searches due to frequent false triggers of the motion sensor, thus significantly saving its power consumption in non-use scenarios.

[0082] S1027: If the power management strategy is the preset intelligent driving management strategy, then control the Bluetooth main module to connect with the Bluetooth key and enter the first positioning mode.

[0083] Specifically, when the vehicle is in remote parking mode, a preset intelligent driving management strategy is executed. In this state, all Bluetooth slave modules are controlled to disable their high-precision angle-of-arrival positioning function. Simultaneously, only the connection between the Bluetooth master module and the Bluetooth key is maintained, and the system enters the first positioning mode. In this mode, the Bluetooth master module primarily relies on the strength of the broadcast signal received from the Bluetooth key for coarse distance monitoring and connection maintenance. Its purpose is not to achieve precise door unlocking, but rather to maintain a basic safety link and distance awareness during autonomous low-speed vehicle movement, ensuring the Bluetooth key remains within controllable range and can quickly respond to parking interruption or takeover commands when necessary, while maintaining low system power consumption.

[0084] In this embodiment, it further includes: if the vehicle or Bluetooth key detects a preset activation action, it controls the Bluetooth master module and multiple Bluetooth slave modules to connect to the Bluetooth key and enter the second positioning mode.

[0085] Specifically, preset activation actions may include, but are not limited to: the vehicle detecting that the door handle is touched or pulled, or the trunk release switch is triggered; the Bluetooth key detecting that its physical button is pressed, thus generating a Remote Keyless Entry (RKE) command; and the vehicle successfully completing pairing authentication with the newly authorized device. When any of the above preset activation actions occur, regardless of the current system's power management strategy or positioning mode, a high-priority forced wake-up process is immediately triggered. This process controls the Bluetooth master module and all Bluetooth slave modules to quickly activate and establish or restore connections with the Bluetooth key, while simultaneously coordinating to enter a high-precision second positioning mode.

[0086] This mechanism ensures that in any low-power sleep state, once a clear user interaction intent or system security boundary change event occurs, it can immediately respond with the highest performance state, thereby completely eliminating user operation delays or "standing still" experience caused by being in power-saving state, and maintaining the core experience of seamless operation while ensuring extreme low power consumption.

[0087] Example 2 Based on the same inventive concept, embodiments of the present invention also provide a low-power control device for a vehicle Bluetooth key, see reference. Figure 3 As shown, the device includes: The determining module 101 is used to determine the corresponding power consumption management strategy based on the status information of the Bluetooth key, the status information of the vehicle, and the relative distance between the Bluetooth key and the vehicle. The control module 102 is used to control the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy.

[0088] Example 3 Based on the same inventive concept, embodiments of the present invention also provide a computer-readable storage medium storing a computer program / instructions thereon, which, when executed by a processor, implements the vehicle Bluetooth key low-power control method as described in Embodiment 1 above.

[0089] Example 4 Based on the same inventive concept, embodiments of the present invention also provide a computer program product, including a computer program / instruction, which, when executed by a processor, implements the vehicle Bluetooth key low-power control method as described in Embodiment 1 above.

[0090] Example 5 Based on the same inventive concept, this embodiment of the invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory. When the processor executes the computer program, it implements the vehicle Bluetooth key low-power control method as described in Embodiment 1 above.

[0091] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0092] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0093] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0094] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0095] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A low-power control method for a vehicle Bluetooth key, applied to a vehicle Bluetooth key system, the vehicle Bluetooth key system comprising a Bluetooth key, a Bluetooth master module, and multiple Bluetooth slave modules located around the vehicle, characterized in that, The method includes: Based on the status information of the Bluetooth key, the status information of the vehicle, and the relative distance between the Bluetooth key and the vehicle, a corresponding power consumption management strategy is determined. According to the power consumption management strategy, control the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module.

2. The method according to claim 1, characterized in that, The Bluetooth key is equipped with a motion sensor. The step of determining a corresponding power management strategy based on the Bluetooth key's status information, the vehicle's status information, and the relative distance between the Bluetooth key and the vehicle includes: If the relative distance and the vehicle's state information indicate that the vehicle is stationary and the Bluetooth key is moving, then the corresponding power management strategy is determined to be a preset dynamic management strategy. If the relative distance indicates that the Bluetooth key and the vehicle are in a relatively stationary state, then the corresponding power consumption management strategy is determined to be the preset stationary management strategy. If the vehicle's status information indicates that the vehicle is in a driving state, then the corresponding power consumption management strategy is determined to be the preset driving management strategy. If the vehicle's status information indicates that the vehicle is in a special state, then the corresponding power consumption management strategy is determined to be a preset special management strategy; wherein, the special state includes factory mode and transportation mode; If the relative distance and the vehicle's state information indicate that the Bluetooth key is inside the vehicle and both the Bluetooth key and the vehicle are stationary, then the corresponding power management strategy is determined to be the preset sleep management strategy. If the status information of the Bluetooth key indicates that the Bluetooth key is woken up by the motion sensor, then the corresponding power management strategy is determined to be the preset wake-up management strategy. If the vehicle's status information indicates that the vehicle is in a remote parking state, then the corresponding power consumption management strategy is determined to be the preset intelligent driving management strategy.

3. The method according to claim 2, characterized in that, The step of controlling the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy includes: If the power consumption management strategy is the preset dynamic management strategy, and if the relative distance is greater than the first distance threshold, then control the Bluetooth main module to connect with the Bluetooth key and enter the first positioning mode; If the relative distance is less than or equal to the first distance threshold, then the Bluetooth master module and the plurality of Bluetooth slave modules are all connected to the Bluetooth key and enter the second positioning mode; wherein, the positioning accuracy of the second positioning mode is higher than that of the first positioning mode; If the startup time of the second positioning mode exceeds the first time threshold, the connection between the plurality of Bluetooth slave modules and the Bluetooth key is disconnected, and the first positioning mode is entered. or, If the startup time of the second positioning mode exceeds the first time threshold, then based on the positioning information of the Bluetooth key obtained in the second positioning mode, the connection between part of the Bluetooth slave module and the Bluetooth key is disconnected, and the third positioning mode is entered; wherein, the positioning accuracy of the third positioning mode is lower than that of the second positioning mode and higher than that of the first positioning mode.

4. The method according to claim 2, characterized in that, The step of controlling the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy includes: If the power consumption management strategy is the preset static management strategy, and if the relative distance is greater than the first distance threshold, then control the Bluetooth main module to connect with the Bluetooth key and enter the first positioning mode; If the vehicle's status information indicates that the vehicle has been in a dormant state for a second time threshold, then the connection between the Bluetooth master module and the Bluetooth key is disconnected.

5. The method according to claim 2, characterized in that, The step of controlling the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy includes: If the power consumption management strategy is the preset driving management strategy, and if the vehicle's driving speed is greater than or equal to a preset speed threshold, then only the Bluetooth master module is controlled to connect to the Bluetooth key, and the communication interval between the Bluetooth master module and the Bluetooth key is adjusted to a preset energy-saving interval. If the power consumption management strategy is the preset special management strategy, then only the Bluetooth master module is controlled to connect with the Bluetooth key, and the communication interval between the Bluetooth master module and the Bluetooth key is adjusted to the preset energy-saving interval.

6. The method according to claim 2, characterized in that, The step of controlling the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy includes: If the power management strategy is the preset sleep management strategy, and if the vehicle's state information indicates that the vehicle has maintained a stationary state for a third time threshold, then the connection between the Bluetooth master module and the Bluetooth key is disconnected.

7. The method according to claim 2, characterized in that, The Bluetooth key is equipped with a positioning chip. Controlling the operating state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power management strategy includes: If the power consumption management strategy is the preset wake-up management strategy, then the current distance between the Bluetooth key and the vehicle is determined based on the positioning chip; If the current distance is greater than the second distance threshold, the Bluetooth key is controlled not to initiate a broadcast and remains in a sleep state; wherein the second distance threshold is greater than the first distance threshold.

8. The method according to claim 2, characterized in that, The step of controlling the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy includes: If the power consumption management strategy is the preset intelligent driving management strategy, then the Bluetooth main module is controlled to connect with the Bluetooth key and enter the first positioning mode.

9. The method according to claim 1, characterized in that, Also includes: If the vehicle or the Bluetooth key detects a preset activation action, it controls the Bluetooth master module and the multiple Bluetooth slave modules to connect to the Bluetooth key and enter the second positioning mode.

10. A low-power control device for a vehicle Bluetooth key, characterized in that, include: The determining module is used to determine the corresponding power consumption management strategy based on the status information of the Bluetooth key, the status information of the vehicle, and the relative distance between the Bluetooth key and the vehicle. The control module is used to control the working state of at least one of the Bluetooth key, the Bluetooth master module, and the Bluetooth slave module according to the power consumption management strategy.

Images