WO2024088225A1 - 一种蓝牙测距方法、电子设备及系统 - Google Patents

一种蓝牙测距方法、电子设备及系统 Download PDF

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Publication number
WO2024088225A1
WO2024088225A1 PCT/CN2023/126062 CN2023126062W WO2024088225A1 WO 2024088225 A1 WO2024088225 A1 WO 2024088225A1 CN 2023126062 W CN2023126062 W CN 2023126062W WO 2024088225 A1 WO2024088225 A1 WO 2024088225A1
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WO
WIPO (PCT)
Prior art keywords
distance
bluetooth
rssi
electronic device
requesting device
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PCT/CN2023/126062
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English (en)
French (fr)
Inventor
范豆豆
彭红星
李世明
姚思
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024088225A1 publication Critical patent/WO2024088225A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the embodiments of the present application relate to terminal technology, and in particular to a Bluetooth ranging method, electronic device and system.
  • the present application provides a Bluetooth distance measurement method, electronic device and system.
  • the distance measurement device obtains the distance between two devices based on the RSSI of the Bluetooth signal of the cooperative device and the Bluetooth distance measurement model; the Bluetooth distance measurement model is obtained based on the weight processing corresponding to multiple spatial positions.
  • the distance between devices can be accurately measured to improve the user experience.
  • an embodiment of the present application provides a Bluetooth ranging method, the method comprising:
  • the responding device establishes a Bluetooth communication connection with the requesting device
  • the responding device After receiving the ranging request sent by the requesting device, the responding device measures the signal strength of the ranging request to obtain a first received signal strength indication RSSI;
  • the responding device obtains the first distance based on the first RSSI and the Bluetooth ranging model;
  • the Bluetooth ranging model is obtained by fitting based on the correspondence between the preset distance from the requesting device and the corrected RSSI at the preset distance, and the corrected RSSI is obtained by processing the multiple RSSIs measured at multiple spatial positions at the same distance from the requesting device when the requesting device broadcasts the Bluetooth signal and the weights corresponding to the multiple spatial positions;
  • the responding device sends the first distance to the requesting device.
  • the distance between devices is determined by the above-mentioned Bluetooth ranging model, and the Bluetooth ranging model is obtained based on the weights of different spatial positions. Therefore, the distance measurement accuracy of a specific spatial position can be improved, thereby improving the user experience.
  • the embodiment of the present application can be applicable to movable terminal devices, and can improve the ranging accuracy in the process of collaboration of movable equipment.
  • low-power Bluetooth is widely used in various terminal devices, in most scenarios, if collaboration between devices is required, the communication function of low-power Bluetooth must be used.
  • the embodiment of the present application can calculate the approximate distance between devices by analyzing some inherent parameters of the Bluetooth module. There is no need to add other ranging equipment, which can reduce the additional power consumption caused by ranging.
  • the present application requires that when the device is communicating via Bluetooth, a Bluetooth received signal strength parameter be added to achieve ranging, without the need for additional ranging equipment.
  • the corrected RSSI is obtained by adding together multiple RSSIs multiplied by weights corresponding to multiple spatial positions.
  • the responding device and the requesting device are at the same distance but at different locations, the magnitude of the first distance is different.
  • the first distance when the spatial position of the responding device relative to the requesting device is a first spatial position, the first distance is d1, and the weight of the first spatial position is the first weight; when the spatial position of the responding device relative to the requesting device is a second spatial position, the first distance is d2, and the weight of the second spatial position is the second weight; the first weight is higher than the second weight;
  • the difference between d1 and d is smaller than the difference between d2 and d; d1, d2 and d are all positive numbers.
  • the spatial position refers to the relative position between two devices.
  • the spatial position of the responding device relative to the requesting device is the first spatial position, that is, the responding device is located on the left of the requesting device.
  • the weights of spatial positions are different when fitting the Bluetooth ranging model, the distance accuracy of the Bluetooth ranging model for different spatial positions is different. Therefore, the ranging capability is higher at the spatial position with a high weight.
  • the weight of the spatial position is obtained based on the position data of other devices when the user uses the requesting device to perform Bluetooth communication with other devices.
  • the spatial weight can be determined based on the user's habit of using the collaborative device, thereby improving the user experience.
  • the method can analyze the user's commonly used device collaborative orientation, divide the weights of different device spatial states and correct them, so that the method can provide a better experience in the user's commonly used orientation.
  • the weight of the spatial position can be determined based on the usual position of the collaborative device when the user uses the ranging device. Assuming that when the user uses the ranging device in collaboration with the collaborative device, the collaborative device is usually located on the left and right sides of the ranging device, the weight of the spatial position located on the left and right sides of the ranging device can be increased, and the weights of other spatial positions can be reduced.
  • the responding device obtains the first distance based on the first RSSI and the Bluetooth ranging model, including:
  • the responding device inputs the first RSSI into a Bluetooth distance measurement model to obtain a second distance;
  • the responding device When determining that the responding device is located in the preset gain direction of the Bluetooth antenna of the requesting device, the responding device processes the second distance to obtain the first distance.
  • the embodiment of the present application takes into account the gain direction of the Bluetooth antenna, and can improve the accuracy of the first distance.
  • the responding device when determining that the responding device is located in a preset gain direction of a Bluetooth antenna of the requesting device, the responding device processes the second distance, including:
  • the responding device When determining that the responding device is located in the maximum gain direction of the Bluetooth antenna of the requesting device, the responding device multiplies the second distance by a preset multiple to obtain the first distance.
  • the embodiment of the present application takes into account that the RSSI is stronger when the responding device is located in the maximum gain direction of the Bluetooth antenna of the requesting device, so the obtained distance is often smaller. Therefore, the embodiment of the present application multiplies the obtained distance by a correction coefficient greater than 1 to obtain a more accurate distance.
  • the responding device when the responding device determines that the responding device is not located in the maximum gain direction of the Bluetooth antenna of the requesting device, the responding device multiplies the second distance by a correction coefficient to obtain the first distance, wherein the correction coefficient may be a value less than 1.
  • the first RSSI includes at least two RSSI parameters, and the method further includes:
  • the responding device calculates the rate of change of at least two RSSI parameters
  • the responding device determines that the responding device is located in the maximum gain direction of the Bluetooth antenna of the requesting device.
  • the responding device after receiving the ranging request sent by the requesting device, measures the signal strength of the ranging request to obtain a first signal strength measurement value RSSI, including:
  • the responding device After receiving the ranging request sent by the requesting device, the responding device measures the signal strength of the ranging request to obtain a second RSSI;
  • the responding device filters the second RSSI to obtain the first RSSI.
  • the fluctuation phenomenon of the measured RSSI value can be filtered to obtain a stable and smooth first RSSI.
  • the embodiment of the present application does not limit the filtering method for determining the target RSSI, and the filtering method includes but is not limited to a data processing method of a mean filter, a Gaussian filter, or a mixed median filter and a Gaussian filter.
  • an embodiment of the present application provides a Bluetooth ranging method, the method comprising:
  • the requesting device establishes a Bluetooth communication connection with the responding device
  • the requesting device sends a parameter request to the responding device; the parameter request is used to request to measure the signal strength of the parameter request to obtain a first received signal strength indication RSSI;
  • the requesting device receives a first RSSI sent by the responding device
  • the requesting device obtains a first distance based on the first RSSI and the Bluetooth ranging model; the Bluetooth ranging model is fitted based on the correspondence between a preset distance from the requesting device and a corrected RSSI at the preset distance, and the corrected RSSI is obtained by processing multiple RSSIs measured at multiple spatial positions at the same distance from the requesting device when the requesting device broadcasts a Bluetooth signal and weights corresponding to the multiple spatial positions.
  • the distance between devices is determined by the above-mentioned Bluetooth ranging model, and the Bluetooth ranging model is obtained based on the weights of different spatial positions. Therefore, the distance measurement accuracy of a specific spatial position can be improved, thereby improving the user experience.
  • the embodiment of the present application can be applicable to movable terminal devices, and can improve the ranging accuracy in the process of collaboration of movable equipment.
  • low-power Bluetooth since low-power Bluetooth is widely used in various terminal settings, in most scenarios, if collaboration between devices is required, it must be used.
  • the embodiment of the present application can calculate the approximate distance between devices by analyzing some inherent parameters of the Bluetooth module, without the need for additional ranging equipment, and can reduce the additional power consumption caused by ranging.
  • the corrected RSSI is obtained by adding together multiple RSSIs multiplied by weights corresponding to multiple spatial positions.
  • the responding device and the requesting device are at the same distance but at different locations, the magnitude of the first distance is different.
  • the weight of the spatial position is obtained based on the position data of other devices when the user uses the requesting device to perform Bluetooth communication with other devices.
  • the requesting device obtains the first distance based on the first RSSI and the Bluetooth ranging model, including:
  • the requesting device inputs the first RSSI into a Bluetooth distance measurement model to obtain a second distance;
  • the requesting device When determining that the responding device is located in the preset gain direction of the Bluetooth antenna of the requesting device, the requesting device processes the second distance to obtain the first distance.
  • the requesting device when determining that the responding device is located in a preset gain direction of a Bluetooth antenna of the requesting device, the requesting device processes the second distance, including:
  • the requesting device When determining that the responding device is located in the maximum gain direction of the Bluetooth antenna of the requesting device, the requesting device multiplies the second distance by a preset multiple to obtain the first distance.
  • the first RSSI includes at least two RSSI parameters
  • the method further includes:
  • the requesting device determines that the responding device is located in the maximum gain direction of the Bluetooth antenna of the requesting device.
  • an embodiment of the present application provides an electronic device, comprising one or more functional modules, which can be used to execute a Bluetooth ranging method in any possible implementation of the first aspect described above.
  • an embodiment of the present application provides an electronic device, comprising one or more functional modules, which can be used to execute a Bluetooth ranging method in any possible implementation of the second aspect.
  • the present application provides a computer storage medium, including computer instructions.
  • the communication device executes the Bluetooth ranging method in any possible implementation of the first aspect.
  • the present application provides a computer storage medium, including computer instructions, which, when executed on an electronic device, enables a communication device to execute a Bluetooth ranging method in any possible implementation of the second aspect.
  • the present application provides a computer program product.
  • the computer program product runs on a computer, it enables the computer to execute the Bluetooth ranging method in any possible implementation of the first aspect.
  • the present application provides a computer program product.
  • the computer program product runs on a computer, it enables the computer to execute the Bluetooth ranging method in any possible implementation of the second aspect.
  • the present application provides a chip, comprising: a processor and an interface, wherein the processor and the interface cooperate with each other so that the chip executes the Bluetooth ranging method in any possible implementation of the first aspect above.
  • the present application provides a chip, comprising: a processor and an interface, wherein the processor and the interface cooperate with each other so that the chip executes the Bluetooth ranging method in any possible implementation of the second aspect above.
  • the electronic device provided in the third and fourth aspects the computer-readable storage medium provided in the fifth and sixth aspects, the computer program product provided in the seventh and eighth aspects, and the chip provided in the ninth and tenth aspects are all used to execute the method provided in the embodiment of the present application. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here.
  • FIG1 is a schematic diagram of a Bluetooth ranging system provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a Bluetooth ranging system in a multi-device collaboration scenario provided by an embodiment of the present application
  • FIG3 is a schematic diagram of the hardware structure of an electronic device 100 provided in an embodiment of the present application.
  • FIG4 is a software structure block diagram of an electronic device 100 provided in an embodiment of the present application.
  • FIG5A is a schematic diagram of the hardware structure of an electronic device 200 provided in an embodiment of the present application.
  • FIG5B is a flow chart of a Bluetooth ranging method provided in an embodiment of the present application.
  • FIG6 is a flow chart of another Bluetooth ranging method provided in an embodiment of the present application.
  • FIG7 is a flow chart of a method for determining a Bluetooth ranging model provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of different spatial positions provided by an embodiment of the present application.
  • FIG9 is a schematic diagram of a weight of a spatial position provided in an embodiment of the present application.
  • FIG10 is a schematic diagram of another Bluetooth ranging method provided in an embodiment of the present application.
  • FIG. 11 is a flow chart of another Bluetooth ranging method provided in an embodiment of the present application.
  • first and second are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality” means two or more.
  • GUI graphical user interface
  • Bluetooth ranging methods are all for indoor scenarios.
  • Existing Bluetooth ranging methods usually consider that Bluetooth signals are affected by multipath, reflection, non-line-of-sight and other factors during indoor propagation, which leads to the problem of volatility and singular values in Bluetooth signal values. Therefore, the least squares method is used to fit the ranging model according to the actual environment, and then the ranging information is obtained based on the fitted ranging model and the processed received signal strength indication (RSSI).
  • RSSI received signal strength indication
  • the Bluetooth transmitting node can be set in the direction of the determined position in this method, and it does not consider factors such as the directionality of Bluetooth antenna transmission; in addition, the transmitting source of the Bluetooth device in this method is in a stationary state, and the movable scenario of the transmitting source is not considered.
  • the inventors of the present application found that when the Bluetooth device is movable, the distance measured by the above-mentioned Bluetooth ranging method is inaccurate and cannot meet user needs.
  • the embodiments of the present application propose a Bluetooth ranging method, electronic device and system.
  • the Bluetooth ranging model is obtained based on weighted fitting of multiple spatial positions, which can accurately measure the distance between devices and improve user experience.
  • the terminal devices around the transmitter may include a head-up display, an LCD instrument panel, a vehicle-mounted central control screen, etc., all of which can be used as the receiving end in the embodiments of this application.
  • the transmitter is a screen projection device
  • the receiver can be the projected device, which can also include: tablet computers, personal computers, televisions, car computers, smart watches, headphones, speakers, virtual reality devices, and augmented reality devices. Or according to actual needs, more other devices can be reduced or added.
  • the Bluetooth ranging system 10 provided in the embodiment of the present application is first introduced below.
  • Fig. 1 is a schematic diagram of the architecture of a Bluetooth distance measurement system 10 provided in an embodiment of the present application.
  • the Bluetooth distance measurement system 10 may include: a first electronic device 101 and a second electronic device 102.
  • the first electronic device 101 and the second electronic device 102 can communicate with each other via Bluetooth technology (including classic Bluetooth BR/EDR (Basic Rate/Enhanced Data Rate) or Bluetooth low energy (Bluetooth low energy, BLE)). Furthermore, during the communication process, the first electronic device 101 or the second electronic device 102 can measure the distance between the two devices.
  • Bluetooth technology including classic Bluetooth BR/EDR (Basic Rate/Enhanced Data Rate) or Bluetooth low energy (Bluetooth low energy, BLE)
  • Bluetooth low energy Bluetooth low energy
  • the first electronic device 101 A distance measurement request may be sent to the second electronic device 102; further, after receiving the distance measurement request sent by the first electronic device 101, the second electronic device 102 measures the signal strength of the distance measurement request to obtain a first received signal strength indication RSSI; the second electronic device 102 obtains the first distance based on the first RSSI and the Bluetooth distance measurement model; the Bluetooth distance measurement model is obtained by fitting based on the corresponding relationship between the preset distance from the first electronic device 101 and the corrected RSSI at the preset distance, and the corrected RSSI is obtained by processing the multiple RSSIs measured at multiple spatial positions at the same distance from the first electronic device 101 when the first electronic device 101 broadcasts the Bluetooth signal and the weights corresponding to the multiple spatial positions; the second electronic device 102 sends the first distance to the first electronic device 101. Then, the first electronic device 101 and the second electronic device 102 may adjust their respective collaborative states based on the distance between them, such as prompting a
  • the first electronic device 101 may be a terminal device supporting Bluetooth function, such as a mobile phone, a laptop computer, a PDA, etc.
  • the second electronic device 102 may also be a terminal device supporting Bluetooth function, such as a mobile phone, a laptop computer, a PDA, etc.
  • the second electronic device 102 may also be a peripheral device supporting Bluetooth function, such as a wireless headset, a smart speaker, a smart watch, etc.
  • the first electronic device 101 and the second electronic device 102 can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, as well as a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, a vehicle-mounted device, a smart home device and/or a smart city device, etc.
  • PDA personal digital assistant
  • AR augmented reality
  • VR virtual reality
  • AI artificial intelligence
  • Bluetooth distance measurement system 10 only exemplarily shows two devices.
  • the Bluetooth ranging system may include multiple devices. Please refer to Figure 2, which exemplarily shows a Bluetooth ranging system 20 in a multi-device collaboration scenario.
  • the system may include a mobile phone, a tablet and a watch, wherein the mobile phone and the watch establish a Bluetooth connection; the mobile phone and the tablet establish a Bluetooth connection, and the watch and the tablet establish a Bluetooth connection.
  • the measuring device may be any one of the three devices, for example, the measuring device may be the one with the strongest computing power among the three devices; the three devices may also all be measuring devices.
  • the measuring device is a mobile phone, and the mobile phone measures a first distance to the watch and a second distance to the tablet after connecting via Bluetooth, and may send the first distance to the watch and the second distance to the tablet.
  • a master device may be connected to multiple slave devices.
  • a mobile phone is the master device, and the mobile phone establishes Bluetooth connections with collaborative devices such as watches, tablets, and speakers.
  • the present application can be applied in application scenarios of spatial multi-device collaboration, such as home scenarios and office scenarios, etc.
  • Bluetooth communicates normally, additional ranging capabilities are added to identify the distance between devices, so as to better analyze the collaborative status of each device.
  • the hardware structure and software architecture of the first electronic device 101 are exemplarily introduced.
  • FIG. 3 shows a schematic diagram of the hardware structure of the electronic device 100 .
  • the embodiment is described in detail below by taking the first electronic device 101 as the electronic device 100 as an example. It should be understood that the electronic device 100 may have more or fewer components than those shown in the figure, may combine two or more components, or may have different component configurations.
  • the various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.
  • the electronic device 100 may include: a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194 and a subscriber identification module (SIM) card interface 195, etc.
  • SIM subscriber identification module
  • the sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.
  • the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 100.
  • the electronic device 100 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently.
  • the components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.
  • the processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and/or a neural-network processing unit (NPU), etc.
  • AP application processor
  • GPU graphics processor
  • ISP image signal processor
  • controller a memory
  • video codec a digital signal processor
  • DSP digital signal processor
  • NPU neural-network processing unit
  • Different processing units may be independent devices or integrated in one or more processors.
  • the controller may be the nerve center and command center of the electronic device 100.
  • the controller may generate an operation control signal according to the instruction operation code and the timing signal to complete the control of fetching and executing instructions.
  • the processor 110 may also be provided with a memory for storing instructions and data.
  • the memory in the processor 110 is a cache memory.
  • the memory may store instructions or data that the processor 110 has just used or cyclically used. If the processor 110 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.
  • the processor 110 may include one or more interfaces.
  • the interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (SIM) interface, and/or a universal serial bus (USB) interface, etc.
  • I2C inter-integrated circuit
  • I2S inter-integrated circuit sound
  • PCM pulse code modulation
  • UART universal asynchronous receiver/transmitter
  • MIPI mobile industry processor interface
  • GPIO general-purpose input/output
  • SIM subscriber identity module
  • USB universal serial bus
  • the I2C interface is a bidirectional synchronous serial bus, including a serial data line (SDA) and a serial clock line (SCL).
  • the processor 110 may include multiple groups of I2C buses.
  • the processor 110 may be coupled to the touch sensor 180K, the charger, the flash, the camera 193, etc. through different I2C bus interfaces.
  • the processor 110 may be coupled to the touch sensor 180K through the I2C interface, so that the processor 110 communicates with the touch sensor 180K through the I2C bus interface, thereby realizing the touch function of the electronic device 100.
  • the I2S interface can be used for audio communication.
  • the processor 110 can include multiple I2S buses.
  • the processor 110 can be coupled to the audio module 170 via the I2S bus to achieve communication between the processor 110 and the audio module 170.
  • the audio module 170 can transmit an audio signal to the wireless communication module 160 via the I2S interface to achieve the function of answering a call through a Bluetooth headset.
  • the PCM interface can also be used for audio communication, sampling, quantizing and encoding analog signals.
  • the audio module 170 and the wireless communication module 160 can be coupled via a PCM bus interface.
  • the audio module 170 can also transmit audio signals to the wireless communication module 160 via the PCM interface to realize the function of answering calls via a Bluetooth headset. Both the I2S interface and the PCM interface can be used for audio communication.
  • the UART interface is a universal serial data bus for asynchronous communication.
  • the bus can be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication.
  • the UART interface is generally used to connect the processor 110 and the wireless communication module 160.
  • the processor 110 communicates with the Bluetooth module in the wireless communication module 160 through the UART interface to implement the Bluetooth function.
  • the audio module 170 can transmit an audio signal to the wireless communication module 160 through the UART interface to implement the function of playing music through a Bluetooth headset.
  • the MIPI interface can be used to connect the processor 110 with peripheral devices such as the display screen 194 and the camera 193.
  • the MIPI interface includes a camera serial interface (CSI), a display serial interface (DSI), etc.
  • the processor 110 and the camera 193 communicate via the CSI interface to implement the shooting function of the electronic device 100.
  • the processor 110 and the display screen 194 communicate via the DSI interface to implement the display function of the electronic device 100.
  • the GPIO interface can be configured by software.
  • the GPIO interface can be configured as a control signal or as a data signal.
  • the GPIO interface can be used to connect the processor 110 with the camera 193, the display 194, the wireless communication module 160, the audio module 170, the sensor module 180, etc.
  • the GPIO interface can also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, etc.
  • the SIM interface can be used to communicate with the SIM card interface 195 to implement the function of transmitting data to the SIM card or reading data in the SIM card.
  • the USB interface 130 is an interface that complies with the USB standard specification, and specifically can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc.
  • the USB interface 130 can be used to connect a charger to charge the electronic device 100, and can also be used to transmit data between the electronic device 100 and a peripheral device. It can also be used to connect headphones to play audio through the headphones.
  • the interface can also be used to connect other electronic devices, such as AR devices, etc.
  • the interface connection relationship between the modules illustrated in the embodiment of the present application is only a schematic illustration and does not constitute a structural limitation on the electronic device 100.
  • the electronic device 100 may also adopt different interface connections in the above embodiments. connection method, or a combination of multiple interface connection methods.
  • the charging management module 140 is used to receive charging input from a charger, where the charger can be a wireless charger or a wired charger.
  • the power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110.
  • the power management module 141 receives input from the battery 142 and/or the charging management module 140 to power the processor 110, the internal memory 121, the external memory, the display screen 194, the camera 193, and the wireless communication module 160.
  • the wireless communication function of the electronic device 100 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.
  • Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in electronic device 100 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of antennas.
  • antenna 1 can be reused as a diversity antenna for a wireless local area network.
  • the antenna can be used in combination with a tuning switch.
  • the mobile communication module 150 can provide solutions for wireless communications including 2G/3G/4G/5G, etc., applied to the electronic device 100.
  • the mobile communication module 150 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc.
  • the mobile communication module 150 may receive electromagnetic waves from the antenna 1, and perform filtering, amplification, and other processing on the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation.
  • the mobile communication module 150 may also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1.
  • at least some of the functional modules of the mobile communication module 150 may be arranged in the processor 110.
  • at least some of the functional modules of the mobile communication module 150 may be arranged in the same device as at least some of the modules of the processor 110.
  • the modem processor may include a modulator and a demodulator.
  • the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal.
  • the demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing.
  • the application processor outputs a sound signal through an audio device (not limited to a speaker 170A, a receiver 170B, etc.), or displays an image or video through a display screen 194.
  • the modem processor may be an independent device.
  • the modem processor may be independent of the processor 110 and be set in the same device as the mobile communication module 150 or other functional modules.
  • the wireless communication module 160 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) and the like applied to the electronic device 100.
  • WLAN wireless local area networks
  • BT wireless fidelity
  • GNSS global navigation satellite system
  • FM frequency modulation
  • NFC near field communication
  • IR infrared
  • the wireless communication module 160 can be one or more devices integrating at least one communication processing module.
  • the wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110.
  • the wireless communication module 160 can also receive the signal to be sent from the processor 110, modulate the frequency, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2.
  • the antenna 1 of the electronic device 100 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the electronic device 100 can communicate with the network and other devices through wireless communication technology.
  • the wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technology.
  • the GNSS may include a global positioning system (GPS), a global navigation satellite system (GLONASS), a Beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS) and/or a satellite based augmentation system (SBAS).
  • GPS global positioning system
  • GLONASS global navigation satellite system
  • BDS Beidou navigation satellite system
  • QZSS quasi-zenith satellite system
  • SBAS satellite based augmentation system
  • the electronic device 100 implements the display function through a GPU, a display screen 194, and an application processor.
  • the GPU is a microprocessor for image processing, which connects the display screen 194 and the application processor.
  • the GPU is used to perform mathematical and geometric calculations for graphics rendering.
  • the processor 110 may include one or more GPUs that execute program instructions to generate or change display information.
  • the display screen 194 is used to display images, videos, etc.
  • the display screen 194 includes a display panel.
  • the display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, a quantum dot light emitting diode (QDLED), or a micro-LED. emitting diodes, QLED) etc.
  • the electronic device 100 may include 1 or N display screens 194 , where N is a positive integer greater than 1.
  • the electronic device 100 can realize the shooting function through ISP, camera 193, video codec, GPU, display screen 194 and application processor.
  • ISP is used to process the data fed back by camera 193. For example, when taking a photo, the shutter is opened, and the light is transmitted to the camera photosensitive element through the lens. The light signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to ISP for processing and converts it into an image visible to the naked eye. ISP can also perform algorithm optimization on the noise, brightness, etc. of the image. ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some embodiments, ISP can be set in camera 193.
  • the camera 193 is used to capture still images or videos.
  • the object generates an optical image through the lens and projects it onto the photosensitive element.
  • the photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) phototransistor.
  • CMOS complementary metal oxide semiconductor
  • the photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal.
  • the ISP outputs the digital image signal to the DSP for processing.
  • the DSP converts the digital image signal into an image signal in a standard RGB, YUV or other format.
  • the electronic device 100 may include 1 or N cameras 193 , where N is a positive integer greater than 1.
  • the digital signal processor is used to process digital signals, and can process not only digital image signals but also other digital signals. For example, when the electronic device 100 is selecting a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy.
  • Video codecs are used to compress or decompress digital videos.
  • the electronic device 100 may support one or more video codecs. In this way, the electronic device 100 may play or record videos in a variety of coding formats, such as Moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, etc.
  • MPEG Moving Picture Experts Group
  • MPEG2 MPEG2, MPEG3, MPEG4, etc.
  • NPU is a neural network (NN) computing processor.
  • NN neural network
  • applications such as intelligent cognition of electronic device 100 can be realized, such as image recognition, face recognition, voice recognition, text understanding, etc.
  • the external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 100.
  • the external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music and videos can be stored in the external memory card.
  • the internal memory 121 can be used to store computer executable program codes, which include instructions.
  • the processor 110 executes various functional applications and data processing of the electronic device 100 by running the instructions stored in the internal memory 121.
  • the internal memory 121 may include a program storage area and a data storage area.
  • the program storage area may store an operating system, applications required for at least one function (such as face recognition function, fingerprint recognition function, mobile payment function, etc.), etc.
  • the data storage area may store data created during the use of the electronic device 100 (such as face information template data, fingerprint information template, etc.), etc.
  • the internal memory 121 may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.
  • a non-volatile memory such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.
  • the electronic device 100 can implement audio functions such as music playing and recording through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone jack 170D, and the application processor.
  • the audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals.
  • the audio module 170 can also be used to encode and decode audio signals.
  • the audio module 170 may be disposed in the processor 110 , or some functional modules of the audio module 170 may be disposed in the processor 110 .
  • the speaker 170A also called a "speaker" is used to convert an audio electrical signal into a sound signal.
  • the electronic device 100 can listen to music or listen to a hands-free call through the speaker 170A.
  • the receiver 170B also called a "earpiece" is used to convert audio electrical signals into sound signals.
  • the voice can be received by placing the receiver 170B close to the human ear.
  • Microphone 170C also called “microphone” or “speaker” is used to convert sound signals into electrical signals.
  • the user can speak by approaching the microphone 170C with his mouth to input the sound signal into the microphone 170C.
  • the electronic device 100 can be provided with at least one microphone 170C.
  • the electronic device 100 may be provided with two microphones 170C, which can not only collect sound signals but also realize noise reduction. In other embodiments, the electronic device 100 may be provided with three, four or more microphones 170C, which can collect sound signals, reduce noise, identify sound sources, realize directional recording functions, etc.
  • the earphone interface 170D is used to connect a wired earphone.
  • the earphone interface 170D may be the USB interface 130, or may be a 3.5 mm open mobile terminal platform (OMTP) standard interface or a cellular telecommunications industry association of the USA (CTIA) standard interface.
  • OMTP open mobile terminal platform
  • CTIA cellular telecommunications industry association of the USA
  • the pressure sensor 180A is used to sense the pressure signal and can convert the pressure signal into an electrical signal.
  • the pressure sensor 180A can be set on the display screen 194.
  • a capacitive pressure sensor can be a parallel plate including at least two conductive materials.
  • the gyro sensor 180B can be used to determine the motion posture of the electronic device 100. In some embodiments, the angular velocity of the electronic device 100 around three axes (ie, x, y, and z axes) can be determined by the gyro sensor 180B. The gyro sensor 180B can be used for anti-shake shooting.
  • the gyro sensor 180B detects the shaking angle of the electronic device 100, calculates the distance that the lens module needs to compensate according to the angle, and allows the lens to offset the shaking of the electronic device 100 through reverse movement to achieve anti-shake.
  • the gyro sensor 180B can also be used for navigation and somatosensory game scenes.
  • the air pressure sensor 180C is used to measure air pressure.
  • the electronic device 100 calculates the altitude through the air pressure value measured by the air pressure sensor 180C to assist in positioning and navigation.
  • the magnetic sensor 180D includes a Hall sensor.
  • the electronic device 100 can use the magnetic sensor 180D to detect the opening and closing of the flip leather case.
  • the electronic device 100 when the electronic device 100 is a flip phone, the electronic device 100 can detect the opening and closing of the flip cover according to the magnetic sensor 180D. Then, according to the detected opening and closing state of the leather case or the opening and closing state of the flip cover, the flip cover can be automatically unlocked.
  • the acceleration sensor 180E can detect the magnitude of the acceleration of the electronic device 100 in all directions (generally three axes). When the electronic device 100 is stationary, the magnitude and direction of gravity can be detected. It can also be used to identify the posture of the electronic device and is applied to applications such as horizontal and vertical screen switching and pedometers.
  • the distance sensor 180F is used to measure the distance.
  • the electronic device 100 can measure the distance by infrared or laser. In some embodiments, when shooting a scene, the electronic device 100 can use the distance sensor 180F to measure the distance to achieve fast focusing.
  • the proximity light sensor 180G may include, for example, a light emitting diode (LED) and a light detector, such as a photodiode.
  • the light emitting diode may be an infrared light emitting diode.
  • the electronic device 100 emits infrared light outward through the light emitting diode.
  • the electronic device 100 uses the photodiode to detect infrared reflected light from nearby objects.
  • the electronic device 100 can use the proximity light sensor 180G to detect that the user holds the electronic device 100 close to the ear to talk, so as to automatically turn off the screen to save power.
  • the proximity light sensor 180G can also be used for automatic unlocking and locking of the screen in the leather case mode and pocket mode.
  • the ambient light sensor 180L is used to sense the brightness of the ambient light.
  • the electronic device 100 can adaptively adjust the brightness of the display screen 194 according to the perceived ambient light brightness.
  • the ambient light sensor 180L can also be used to automatically adjust the white balance when taking pictures.
  • the ambient light sensor 180L can also cooperate with the proximity light sensor 180G to detect whether the electronic device 100 is in a pocket to prevent accidental touches.
  • the fingerprint sensor 180H is used to collect fingerprints.
  • the electronic device 100 can use the collected fingerprint characteristics to implement fingerprint unlocking, access application locks, fingerprint photography, fingerprint call answering, etc.
  • the temperature sensor 180J is used to detect temperature.
  • the electronic device 100 uses the temperature detected by the temperature sensor 180J to execute a temperature processing strategy. For example, when the temperature reported by the temperature sensor 180J exceeds a threshold, the electronic device 100 reduces the performance of a processor located near the temperature sensor 180J to reduce power consumption and implement thermal protection. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 heats the battery 142 to avoid abnormal shutdown of the electronic device 100 due to low temperature. In other embodiments, when the temperature is lower than another threshold, the electronic device 100 boosts the output voltage of the battery 142 to avoid abnormal shutdown caused by low temperature.
  • the touch sensor 180K is also called a "touch panel”.
  • the touch sensor 180K can be set on the display screen 194.
  • the touch sensor 180K and the display screen 194 form a touch screen, also called a "touch screen”.
  • the touch sensor 180K is used to detect touch operations acting on or near it.
  • the touch sensor may transmit the detected touch operation to the application processor to determine the type of touch event.
  • Visual output related to the touch operation may be provided through the display screen 194.
  • the touch sensor 180K may also be disposed on the surface of the electronic device 100, at a different location from the display screen 194.
  • the key 190 includes a power key, a volume key, etc.
  • the key 190 may be a mechanical key or a touch key.
  • the electronic device 100 may receive key input and generate key signal input related to user settings and function control of the electronic device 100.
  • Motor 191 can generate vibration prompts.
  • Motor 191 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback.
  • touch operations acting on different applications can correspond to different vibration feedback effects.
  • touch operations acting on different areas of the display screen 194 can also correspond to different vibration feedback effects.
  • Different application scenarios for example: time reminders, receiving messages, alarm clocks, games, etc.
  • the touch vibration feedback effect can also support customization.
  • Indicator 192 may be an indicator light, which may be used to indicate charging status, power changes, synthesis requests, missed calls, notifications, etc.
  • the SIM card interface 195 is used to connect a SIM card.
  • the SIM card can be connected to or separated from the electronic device 100 by inserting it into the SIM card interface 195 or pulling it out from the SIM card interface 195.
  • the electronic device 100 can support 1 or N SIM card interfaces, where N is a positive integer greater than 1.
  • the SIM card interface 195 can support Nano SIM cards, Micro SIM cards, SIM cards, and the like. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the multiple cards can be the same or different.
  • the SIM card interface 195 can also be compatible with different types of SIM cards.
  • the SIM card interface 195 can also be compatible with external memory cards.
  • the electronic device 100 interacts with the network through the SIM card to implement functions such as calls and data communications.
  • the electronic device 100 can perform the Bluetooth ranging method through the processor 110 and the wireless communication module 160.
  • the method described in the embodiment of the present application is partially implemented by the wireless communication module 160 of the electronic device 100 shown in Figure 3, which can be specifically executed by a Bluetooth module or a Bluetooth chip.
  • FIG. 4 is a software structure block diagram of an electronic device 100 disclosed in an embodiment of the present application.
  • the layered architecture divides the software into several layers, each with clear roles and division of labor.
  • the layers communicate with each other through software interfaces.
  • the system is divided into four layers, from top to bottom: application layer, application framework layer, runtime and system library, and kernel layer.
  • the application layer can include a series of application packages.
  • the application layer also includes a Bluetooth module
  • the application package may include camera, gallery, calendar, call, map, navigation, WLAN, music, video, short message and other applications (also referred to as applications).
  • the application framework layer provides application programming interface (API) and programming framework for the applications in the application layer.
  • API application programming interface
  • the application framework layer includes some predefined functions.
  • the application framework layer may include a window manager, a content provider, a view system, a telephony manager, a resource manager, a notification manager, and the like.
  • the window manager is used to manage window programs.
  • the window manager can obtain the display screen size, determine whether there is a status bar, lock the screen, capture the screen, etc.
  • Content providers are used to store and retrieve data and make it accessible to applications.
  • the data may include videos, images, audio, calls made and received, browsing history and bookmarks, phone books, etc.
  • the view system includes visual controls, such as controls for displaying text, controls for displaying images, etc.
  • the view system can be used to build applications.
  • a display interface can be composed of one or more views.
  • a display interface including a text notification icon can include a view for displaying text and a view for displaying images.
  • the phone manager is used to provide communication functions of the electronic device 100, such as management of call status (including connecting, hanging up, etc.).
  • the resource manager provides various resources for applications, such as localized strings, icons, images, layout files, video files, and so on.
  • the notification manager enables applications to display notification information in the status bar. It can be used to convey notification-type messages and can disappear automatically after a short stay without user interaction. For example, the notification manager is used to notify download completion, message reminders, etc.
  • the notification manager can also be a notification that appears in the system top status bar in the form of a chart or scroll bar text, such as notifications from applications running in the background, or a notification that appears on the screen in the form of a dialogue interface. For example, a text message is displayed in the status bar, a prompt sound is emitted, an electronic device vibrates, an indicator light flashes, etc.
  • the runtime includes the core library and the virtual machine.
  • the runtime is responsible for the scheduling and management of the system.
  • the core library consists of two parts: one part is the function that the programming language (for example, Java language) needs to call, and the other part is the system Core library.
  • the application layer and the application framework layer run in a virtual machine.
  • the virtual machine executes the programming files (e.g., java files) of the application layer and the application framework layer as binary files.
  • the virtual machine is used to perform functions such as object life cycle management, stack management, thread management, security and exception management, and garbage collection.
  • the system library can include multiple functional modules, such as surface manager, media library, 3D graphics processing library (such as OpenGL ES), 2D graphics engine (such as SGL), etc.
  • functional modules such as surface manager, media library, 3D graphics processing library (such as OpenGL ES), 2D graphics engine (such as SGL), etc.
  • the surface manager is used to manage the display subsystem and provides the fusion of two-dimensional (2D) and three-dimensional (3D) layers for multiple applications.
  • the media library supports playback and recording of a variety of commonly used audio and video formats, as well as static image files, etc.
  • the media library can support a variety of audio and video encoding formats, such as: MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, etc.
  • the 3D graphics processing library is used to implement 3D graphics drawing, image rendering, compositing, and layer processing.
  • a 2D graphics engine is a drawing engine for 2D drawings.
  • the kernel layer is the layer between hardware and software.
  • the kernel layer contains at least display driver, camera driver, audio driver, sensor driver, and virtual card driver.
  • the corresponding hardware interrupt is sent to the kernel layer.
  • the kernel layer processes the touch operation into a raw input event (including touch coordinates, timestamp of the touch operation, and other information).
  • the raw input event is stored in the kernel layer.
  • the application framework layer obtains the raw input event from the kernel layer and identifies the control corresponding to the input event. For example, if the touch operation is a touch single-click operation and the control corresponding to the single-click operation is the control of the camera application icon, the camera application calls the interface of the application framework layer to start the camera application, and then starts the camera driver by calling the kernel layer to capture static images or videos through the camera 193.
  • the structural diagram of the second electronic device can be similar to the electronic device 100, which is not described in detail here.
  • the structural diagram of the second electronic device 102 refers to the electronic device 200 shown in FIG. 5A.
  • FIG5A exemplarily shows a schematic structural diagram of an electronic device 200 provided in an embodiment of the present application.
  • the embodiment is described in detail below by taking the electronic device 200 as an example. It should be understood that the electronic device 200 shown in FIG. 5A is only an example, and the electronic device 200 may have more or fewer components than those shown in FIG. 5A, may combine two or more components, or may have different component configurations.
  • the various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
  • the electronic device 200 may include: a processor 201 , a memory 202 , a Bluetooth communication module 203 , an antenna 204 , a power switch 205 , a USB communication processing module 206 , and an audio module 207 .
  • a processor 201 the electronic device 200 may include: a processor 201 , a memory 202 , a Bluetooth communication module 203 , an antenna 204 , a power switch 205 , a USB communication processing module 206 , and an audio module 207 .
  • the processor 201 can be used to read and execute computer-readable instructions.
  • the processor 201 may mainly include a controller, an arithmetic unit, and a register.
  • the controller is mainly responsible for decoding instructions and issuing control signals for operations corresponding to the instructions.
  • the arithmetic unit is mainly responsible for saving register operands and intermediate operation results temporarily stored during the execution of instructions.
  • the hardware architecture of the processor 201 may be an application-specific integrated circuit (ASIC) architecture, a MIPS architecture, an ARM architecture, or an NP architecture, etc.
  • ASIC application-specific integrated circuit
  • the processor 201 may be used to parse a signal received by the Bluetooth communication module 203, such as a pairing mode modification request sent by the first electronic device 101, etc.
  • the processor 201 may be used to perform corresponding processing operations according to the parsing result, such as generating a pairing mode modification response, etc.
  • the memory 202 is coupled to the processor 201 and is used to store various software programs and/or multiple sets of instructions.
  • the memory 202 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more disk storage devices, flash memory devices or other non-volatile solid-state storage devices.
  • the memory 202 may store an operating system, such as uCOS, VxWorks, RTLinux and other embedded operating systems.
  • the memory 202 may also store a communication program, which may be used to communicate with the first electronic device 101, one or more servers, or other devices.
  • the Bluetooth communication module 203 may include a Bluetooth low energy (BLE) module; it may also include a classic Bluetooth (BR/EDR) module.
  • BLE Bluetooth low energy
  • BBR/EDR classic Bluetooth
  • the Bluetooth communication module 203 can monitor signals transmitted by other devices (such as the first electronic device 101), such as detection requests, scanning signals, etc., and can send response signals, scanning responses, etc., so that other devices (such as the first electronic device 101) can discover the electronic device 200, and establish wireless communication connections with other devices (such as the first electronic device 101), and communicate with other devices (such as the first electronic device 101) via Bluetooth.
  • other devices such as the first electronic device 101
  • the Bluetooth communication module 203 can monitor signals transmitted by other devices (such as the first electronic device 101), such as detection requests, scanning signals, etc., and can send response signals, scanning responses, etc., so that other devices (such as the first electronic device 101) can discover the electronic device 200, and establish wireless communication connections with other devices (such as the first electronic device 101), and communicate with other devices (such as the first electronic device 101) via Bluetooth.
  • the Bluetooth communication module 203 may also transmit signals, such as broadcasting BLE signals, so that other devices (such as the first electronic device 101) can discover the electronic device 200, and establish wireless communication connections with other devices (such as the first electronic device 101), and communicate with other devices (such as the first electronic device 101) via Bluetooth.
  • signals such as broadcasting BLE signals
  • the wireless communication function of the electronic device 200 can be implemented through the antenna 204, the Bluetooth communication module 203, the modem processor, etc.
  • Antenna 204 may be used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 200 may be used to cover a single or multiple communication frequency bands.
  • the Bluetooth communication module 203 may have one or more antennas.
  • the power switch 205 may be used to control the supply of power to the electronic device 200 .
  • the USB communication processing module 206 may be used to communicate with other devices via a USB interface (not shown).
  • the audio module 207 can be used to output audio signals through the audio output interface, so that the electronic device 200 can support audio playback.
  • the audio module 207 can also be used to receive audio data through the audio input interface.
  • the electronic device 200 can be a media playback device such as a Bluetooth headset.
  • the electronic device 200 may further include a display screen (not shown), wherein the display screen may be used to display images, prompt information, etc.
  • the display screen may be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a flexible light-emitting diode (FLED) display screen, a quantum dot light-emitting diode (QLED) display screen, and the like.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • AMOLED active-matrix organic light-emitting diode
  • FLED flexible light-emitting diode
  • QLED quantum dot light-emitting diode
  • the electronic device 200 may further include a serial interface such as an RS-232 interface.
  • the serial interface may be connected to other devices, such as an audio player such as a speaker, so that the electronic device 200 and the audio player cooperate to play audio and video.
  • the structure shown in FIG. 5A does not constitute a specific limitation on the electronic device 200.
  • the electronic device 200 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently.
  • the components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.
  • the structure shown in FIG. 5A does not constitute a specific limitation on the electronic device 200.
  • the electronic device 200 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently.
  • the components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.
  • the electronic device 200 may include the hardware included in the structure shown in Figure 5A above.
  • the various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.
  • the software system of the electronic device 200 may adopt a layered architecture, an event-driven architecture, a micro-core architecture, a micro-service architecture, or a cloud architecture, etc.
  • the software system of the electronic device 200 may include but is not limited to Linux or other operating systems. It is Huawei's Hongmeng system.
  • the electronic device 200 is an Android system, which is divided into four layers, namely, from top to bottom, an application layer, an application framework layer, an Android runtime and a system library, and a kernel layer.
  • the application layer may include a screen projection management application for device connection and screen projection display
  • the application framework layer may include an event manager, a window manager, and a display manager, etc.
  • the system library may include a media library and event data, etc.
  • the kernel layer is used for device discovery, device authentication, and device connection, etc. The specific contents of each part can be found in the relevant description in Figure 5A, which will not be repeated here.
  • FIG5B exemplarily shows the system architecture of the first electronic device and the second electronic device, wherein both the first electronic device and the second electronic device are Hongmeng systems.
  • the first step BLE discovery
  • the second step broadcasts the ranging instruction through its own Bluetooth interface and Bluetooth chip
  • the second electronic device receives the instruction through its own Bluetooth interface and Bluetooth chip by scanning
  • the third step non-link ranging
  • the second electronic device obtains the RSSI parameter corresponding to the instruction
  • the second electronic device sends the RSSI parameter to the first electronic device through the soft bus collaboration based on the Multicast Source Discovery Protocol (MSDP), and the first electronic device performs distance measurement based on the above RSSI parameter.
  • MSDP Multicast Source Discovery Protocol
  • the Bluetooth ranging method provided in an embodiment of the present application is described in detail below based on the schematic diagram of the Bluetooth ranging system 10 shown in Figure 1, the hardware and software structure schematic diagrams of the electronic device 100 shown in Figures 3 and 4, and the hardware structure schematic diagram of the electronic device 200 shown in Figure 5A.
  • FIG6 exemplarily shows another Bluetooth distance measurement method process provided by an embodiment of the present application.
  • the method may include some or all of the following steps:
  • the user operation can be a touch operation (such as a click operation, a long press operation, an up slide operation, a down slide operation or a side slide operation) or a contactless operation (such as an air gesture) or a voice command.
  • a touch operation such as a click operation, a long press operation, an up slide operation, a down slide operation or a side slide operation
  • a contactless operation such as an air gesture
  • Step S601 The first electronic device establishes a Bluetooth communication connection with the second electronic device.
  • the first electronic device when the first electronic device detects a user operation to turn on Bluetooth, in response to the user operation, it sends a connection request to the second electronic device and listens to the broadcast signal of the second electronic device; when the first electronic device hears the broadcast signal from the second electronic device, it responds to establish a BLE connection between the first electronic device and the second electronic device.
  • a user can turn on the Bluetooth function of a mobile phone or a computer and establish a Bluetooth connection.
  • a user can turn on Bluetooth in a mobile phone; then, the mobile phone detects the user's operation on Bluetooth, and the mobile phone can display a list of devices that have turned on Bluetooth, for example, the device list includes the logo of a computer. Then, if it is detected that the user selects the logo of a computer in the device list, the mobile phone can establish a Bluetooth connection with the computer.
  • the smart TV, computer and mobile phone A form a device group.
  • the members in the device group can be dynamically increased or decreased.
  • the first electronic device is a mobile phone
  • the second electronic device can be a computer and a smart TV, that is, the mobile phone establishes a Bluetooth communication connection with the computer and the smart TV respectively.
  • the mobile phone can obtain the distance between the computer and the smart TV respectively.
  • Step S602 the first electronic device sends a distance measurement request to the second electronic device, where the distance measurement request includes a distance measurement instruction, and the distance measurement instruction is used to request to obtain the distance to the first electronic device.
  • the first electronic device after establishing a Bluetooth communication connection with the second electronic device, broadcasts a ranging request via BLE.
  • the first electronic device may display a distance measurement control, and then, in response to a user operation on the distance measurement control, send a distance measurement request to the second electronic device.
  • the first electronic device may display a prompt message and related controls, wherein the prompt message is used to prompt the user whether distance measurement is required, for example, the prompt message is "whether to detect the distance with the second electronic device", and the related controls may include a confirmation control and a rejection control; then, the first electronic device performs step S602 when detecting a user operation on the confirmation control, and does not perform step S602 when detecting a user operation on the rejection control.
  • the first electronic device and the second electronic device are in a multi-device collaboration scenario.
  • the first electronic device after the first electronic device establishes a Bluetooth communication connection with the second electronic device, it also establishes a Bluetooth communication connection with multiple other devices.
  • the other multiple devices After the first electronic device broadcasts the above-mentioned parameter request, the other multiple devices can also measure the RSSI of the ranging request after receiving the ranging request, and send the measured RSSI to the first electronic device so that the first electronic device can obtain the distance information with each device.
  • Step S603 after receiving the ranging request, the second electronic device obtains received signal strength indication RSSI of multiple ranging requests.
  • the second electronic device after receiving the ranging request, measures the RSSI of the received multiple ranging requests in response to the ranging request.
  • the method for measuring RSSI is not limited here.
  • Step S604 the second electronic device determines a target RSSI based on the RSSIs of the multiple ranging requests.
  • the second electronic device may filter the RSSIs of the multiple ranging instructions to obtain the target RSSI, wherein the filtering process may include removing part of the RSSIs of the multiple ranging instructions based on a preset rule, taking an average, and the like.
  • the propagation of wireless signals in the actual environment has certain rules, that is, as the distance between the receiving node and the Bluetooth node increases, the received signal strength decays in the form of a logarithmic function. Due to the influence of factors such as multipath and non-line-of-sight in the actual ranging situation, the measured RSSI value has a large volatility, resulting in deviation from the true value. Therefore, the data can be filtered before being substituted into the formula to improve the RSSI ranging accuracy.
  • the second electronic device in response to the fluctuation phenomenon of the measured RSSI value, can use a data processing method of mean filtering, Gaussian filtering, or a mixture of median filtering and Gaussian filtering to process the measured RSSI value, thereby obtaining a stable and smooth target RSSI.
  • the embodiment of the present application does not limit the filtering method for determining the target RSSI.
  • Step S605 the second electronic device inputs the target RSSI into a Bluetooth distance measurement model to obtain a first distance, wherein the Bluetooth distance measurement model is obtained based on weights of different spatial positions.
  • the weights of different spatial positions include weights of at least two spatial positions.
  • Figure 7 is a flow chart of a method for determining a Bluetooth ranging model provided by an embodiment of the present application.
  • the following description is made by taking a ranging device as an example, and the ranging device can be a first electronic device or a second electronic device.
  • S701 Determine an initial Bluetooth ranging model, where the initial Bluetooth ranging model is used to indicate a corresponding relationship between distance and RSSI.
  • the carrier frequency of BLE is generally between 2400 and 2483.5 MHz
  • the carrier frequency can be set to 2450 MHz to determine the initial Bluetooth ranging model.
  • the carrier frequency is 2450MHz, the following initial Bluetooth ranging model is obtained:
  • d is the distance between the two devices
  • Advpower is the transmission power
  • Lin is the indoor path loss (constant)
  • RSSI is the strength indication of the Bluetooth signal when the device distance is d.
  • the Bluetooth ranging model may also be other formulas, which are not limited here.
  • S702 Determine weights of different spatial positions at the same distance of the ranging device to obtain weights of multiple spatial positions, wherein the distance between each spatial position and the ranging device is a fitting distance.
  • the distance between each spatial position and the ranging device is the same, and the value of the fitting distance is not limited here.
  • Figure 8 is a schematic diagram of different spatial positions provided in an embodiment of the present application.
  • Figure 8 exemplarily shows 11 spatial positions on a horizontal plane, which can be a plane horizontal to the ground.
  • a ranging device is placed on a desktop, and an empty position is determined every 30° with d1 as the radius and the geometric center of the ranging device as the center of a circle on the desktop, to obtain 11 spatial positions as shown in Figure 8. It can be seen that the distance between each spatial position and the ranging device is equal, which is d1.
  • the weight of the spatial location may be determined based on the user's habits, such as the user's usage data.
  • user data of the user when using the ranging device and the collaborative device can be collected, and then the spatial weight of the relative position between the ranging device and the collaborative device can be divided based on the user data.
  • the weight of the spatial position can be determined based on the usual position of the collaborative device when the user uses the ranging device. Assuming that when the user uses the ranging device in collaboration with the collaborative device, the collaborative device is usually located on the left and right sides of the ranging device, the weight of the spatial position on the left and right sides of the ranging device can be increased, and the weight of other spatial positions can be reduced.
  • the present application adopts a spatial weight division method to analyze the collaborative orientation of the user's commonly used devices, divide the weights of different device spatial states and correct them, which can improve the accuracy of the distance measured by the collaborative device in the user's commonly used orientation, so that a better experience can be provided in the user's commonly used orientation.
  • Figure 9 is a schematic diagram of the weight of a spatial position provided in an embodiment of the present application.
  • A is used to represent a ranging device
  • B is used to represent a collaborative device; the distance from each B to A is equal, and each B and A are located on the same horizontal plane.
  • the probability of determining that the collaborative device is located at position 1 and position 2 is 14.54%, then the weights of position 1 and position 2 can be determined to be 14.54%; the method for determining the weights of other positions where B is located is the same as the method for determining the weight of position 1, and will not be repeated.
  • 100, 150, 200, 300 and 400 shown in Figure 9 are only used to reflect the proportional relationship between different spatial weights.
  • the spatial position refers to the relative position between two devices.
  • the spatial position of the responding device relative to the requesting device is the first spatial position, that is, the responding device is located on the left of the requesting device.
  • the weights of spatial positions are different when fitting the Bluetooth ranging model, the distance accuracy of the Bluetooth ranging model for different spatial positions is different. Therefore, the ranging capability is higher at the spatial position with a high weight.
  • S703 The ranging device broadcasts a Bluetooth signal.
  • the ranging device may broadcast a preset Bluetooth signal via BLE in response to a user operation.
  • S704 Detect the RSSI of the Bluetooth signal at the above multiple spatial positions respectively to obtain RSSI corresponding to the multiple spatial positions.
  • the same collaborative device can be placed at each of the above multiple spatial locations to detect the RSSI of the Bluetooth signal respectively, thereby obtaining the RSSI corresponding to each spatial location.
  • the RSSI corresponding to each spatial location can be obtained by filtering, and the filtering method is not limited here.
  • S705 Determine a fitted RSSI based on the weights of the multiple spatial positions and the RSSIs corresponding to the multiple spatial positions.
  • the RSSI corresponding to each spatial position may be multiplied by the weight corresponding to each spatial position to obtain a plurality of processed RSSIs; then, the plurality of processed RSSIs may be averaged to obtain a fitted RSSI.
  • the weights of multiple spatial positions can be in the format of percentage.
  • the weights of multiple spatial positions can also be in the format of data or proportion, which is not limited here.
  • the distance between devices is determined by the above-mentioned Bluetooth ranging model, and the Bluetooth ranging model is obtained based on the weights of different spatial positions. Therefore, the distance measurement accuracy of a specific spatial position can be improved, thereby improving the user experience.
  • the embodiment of the present application can be applicable to movable terminal devices, and can improve the ranging accuracy in the process of collaboration of movable equipment.
  • low-power Bluetooth since low-power Bluetooth is widely used in various terminal settings, it is necessary to use it in most scenarios if collaboration between devices is required.
  • the communication function of low-power Bluetooth can calculate the approximate distance between devices by analyzing some inherent parameters of the Bluetooth module. There is no need to add other ranging equipment, which can reduce the additional power consumption caused by ranging.
  • S706 Fitting the initial Bluetooth ranging model based on the fitted RSSI and the fitted distance to obtain the above Bluetooth ranging model.
  • the fitted RSSI and the fitted distance may be input into the above formula (1), Advpower may be used as an unknown quantity, and Advpower may be calculated; the calculated Advpower may be substituted into the above formula (1) to obtain a Bluetooth ranging model.
  • Step S606 the second electronic device determines the gain direction of the Bluetooth antenna of the first electronic device based on the RSSI of the plurality of ranging instructions.
  • the second electronic device calculates the change rate of RSSI based on the RSSI of multiple ranging instructions; and determines the gain direction of the Bluetooth antenna of the first electronic device of the second electronic device based on the change rate of RSSI.
  • the second electronic device can take the difference between the RSSIs of multiple ranging instructions, and then take the difference between each two ranging instructions as the time difference between the two ranging instructions to obtain N values; divide the N values by N to obtain the change rate, where N is a positive integer.
  • the three ranging instructions are the first instruction, the second instruction and the third instruction.
  • the RSSI of the first instruction is a
  • the RSSI of the second instruction is b
  • the RSSI of the third instruction is c
  • the time of receiving the first instruction is ta
  • the time of receiving the second instruction is tb
  • the time of receiving the third instruction is tc .
  • the rate of change m can be calculated by the following formula (2).
  • change rate may also be calculated in other ways, and the way of calculating the change rate is not limited here.
  • Step S607 When determining the maximum gain direction of the Bluetooth antenna of the first electronic device, the second electronic device multiplies the first distance by a preset multiple to obtain a second distance.
  • the second electronic device when the second electronic device determines that the rate of change is greater than a preset threshold (in the maximum gain direction), the second electronic device multiplies the first distance by a preset multiple to obtain a second distance.
  • the preset threshold and the preset multiple can be determined based on actual conditions, for example, the preset multiple can be 1.2 or 1.4, which is not limited here.
  • the RSSI is stronger when the responding device is located in the maximum gain direction of the Bluetooth antenna of the requesting device, so the obtained distance is often smaller. Therefore, in the embodiment of the present application, the distance is multiplied by a correction coefficient greater than 1 to obtain a more accurate distance.
  • the second electronic device when the second electronic device determines that the change rate is not greater than a preset threshold (not in the direction of maximum gain), it multiplies the first distance by a preset correction coefficient to obtain a second distance, wherein the correction coefficient can be a value less than 1.
  • Step S608 the second electronic device sends a response message to the first electronic device, where the response message includes the second distance.
  • the second electronic device may send a response message to the first electronic device, where the response message includes the second distance.
  • the second electronic device when the second electronic device executes step S606, if it determines that the second electronic device is not located in the maximum gain direction of the Bluetooth antenna of the first electronic device, the second electronic device may send a response message to the first electronic device, where the response message includes the first distance.
  • the second electronic device can determine the collaborative state of the first electronic device based on the second distance. For example, when the second distance is greater than a preset distance, it is considered that the collaborative state of the first electronic device is not good. Then, the second electronic device can prompt the user through a display screen or voice broadcast.
  • the first electronic device may determine the cooperative state of the second electronic device based on the second distance. For example, when the second distance is greater than a preset distance, the cooperative state of the second electronic device is considered to be poor, and then the first electronic device may prompt the user through a display screen or voice broadcast, etc. For example, in the Bluetooth application of the first electronic device, the connected device may be displayed, and the distance information of the device may also be displayed.
  • the distance measurement operation may also be performed by the first electronic device.
  • the first electronic device and the second electronic device send a request message, where the request message is used to request the second electronic device to receive the RSSI of the Bluetooth signal of the first electronic device; then, after obtaining the RSSI, the second electronic device can send the RSSI to the first electronic device, and the first electronic device executes the above steps S604 to S607 to determine the first distance or the second distance.
  • FIG. 10 is a schematic diagram of another Bluetooth ranging method provided in an embodiment of the present application.
  • S801 The first electronic device and the second electronic device establish a Bluetooth communication connection.
  • step S803 can refer to the content of step S601, which will not be repeated here.
  • the first electronic device sends a parameter request to the second electronic device, where the parameter request is used to request a received signal strength indicator RSSI of the parameter request of the first electronic device.
  • the first electronic device broadcasts a parameter request, where the parameter request is used to request the RSSI of the Bluetooth signal broadcast by the first electronic device.
  • the first electronic device and the second electronic device are in a multi-device collaboration scenario.
  • the first electronic device after the first electronic device establishes a Bluetooth communication connection with the second electronic device, it also establishes a Bluetooth communication connection with multiple other devices.
  • the other multiple devices can also measure the RSSI of the parameter request after receiving the parameter request, and send the measured RSSI to the first electronic device so that the first electronic device can obtain the distance information with each device.
  • the other multiple devices can also perform the following steps S803 to S805.
  • the second electronic device After receiving the parameter request, the second electronic device obtains received signal strength indication RSSI of multiple parameter requests.
  • step S803 can refer to the content of step S603, which will not be repeated here.
  • the second electronic device determines a target RSSI based on the RSSIs of the multiple parameter requests.
  • step S804 can refer to the content of step S604, which will not be repeated here.
  • the second electronic device sends a response message to the first electronic device, where the response message includes a target RSSI.
  • the first electronic device inputs the target RSSI into a Bluetooth distance measurement model to obtain a first distance, wherein the Bluetooth distance measurement model is obtained based on weights of different spatial positions.
  • step S808 can refer to the content of step S605, which will not be repeated here.
  • the first electronic device determines the gain direction of the second electronic device at the Bluetooth antenna of the first electronic device based on the RSSIs of the multiple ranging instructions.
  • step S807 can refer to the content of step S606, which will not be repeated here.
  • the first electronic device when the first electronic device determines the maximum gain direction of the second electronic device in the Bluetooth antenna of the first electronic device, the first electronic device may execute step S808.
  • the first electronic device when the first electronic device determines that the second electronic device is not in the maximum gain direction of the Bluetooth antenna of the first electronic device, the first electronic device may not process the first distance and directly use the first distance as the distance between the first electronic device and the second electronic device; alternatively, the first electronic device may multiply the first distance by a correction coefficient to obtain the second distance, and the correction coefficient may be a value less than 1.
  • step S808 can refer to the content of step S607, which will not be repeated here.
  • the first electronic device may send the second distance to the second electronic device.
  • Figure 11 is a schematic diagram of another Bluetooth distance measurement method provided in an embodiment of the present application.
  • the method can be executed by the electronic device 100 or the electronic device 200, or any device in Figure 1 or Figure 2.
  • S1 Receive a user operation indicating the start of ranging, and measure the RSSI of the Bluetooth signal sent by the master device.
  • the collaborative device receives a user operation indicating the start of ranging and measures the RSSI of the Bluetooth signal sent by the master device.
  • the collaborative device may be the second electronic device in FIG6
  • the master device may be the first electronic device in FIG6 .
  • the details of step S1 may refer to the relevant description of FIG6 above, and will not be repeated here.
  • the filtering method is not limited here, and reference may be made to the relevant description of step S604 above.
  • S3 Input the filtered RSSI into the Bluetooth ranging model to obtain the target distance; wherein the Bluetooth ranging model is obtained through the commonly used cooperative orientation correction.
  • the correction process of the Bluetooth ranging model can refer to the relevant description in FIG. 7 .
  • step S4 Determine whether the collaborative device is located in the Bluetooth gain direction of the master device. If the collaborative device is located in the Bluetooth gain direction of the master device, execute step S5; if the collaborative device is not located in the Bluetooth gain direction of the master device, execute step S6.
  • the collaborative device is located in the Bluetooth gain direction of the master device, that is, the collaborative device is located in the maximum gain direction of the Bluetooth antenna of the master device.
  • the process of determining whether the collaborative device is located in the Bluetooth gain direction of the master device can refer to the relevant step S606. describe.
  • the target distance may be multiplied by a preset multiple, and the preset multiple may be a value greater than 1.
  • the method for performing gain direction correction on the target distance can refer to the relevant description of step S607 above.
  • the target distance may not be corrected in the non-gain direction, and the target distance is used as the corrected distance; then, S7 is executed to output the corrected distance.
  • the target may be corrected in a non-gain direction, for example, by multiplying the target by a correction coefficient, where the correction coefficient is less than 1, to obtain a corrected distance.
  • the corrected distance can be obtained.
  • An embodiment of the present application also provides an electronic device, which includes one or more processors and one or more memories; wherein the one or more memories are coupled to the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions, and when the one or more processors execute the computer instructions, the electronic device executes the method described in the above embodiment.
  • the embodiments of the present application also provide a computer program product including instructions.
  • the computer program product When the computer program product is executed on an electronic device, the electronic device executes the method described in the above embodiments.
  • An embodiment of the present application also provides a computer-readable storage medium, including instructions, which, when executed on an electronic device, enable the electronic device to execute the method described in the above embodiment.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated.
  • the available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive Solid State Disk), etc.
  • the processes can be completed by computer programs to instruct related hardware, and the programs can be stored in computer-readable storage media.
  • the programs can include the processes of the above-mentioned method embodiments.
  • the aforementioned storage media include: ROM or random access memory RAM, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请提供了一种蓝牙测距方法、电子设备及系统，方法包括：响应设备与请求设备建立蓝牙通信连接；响应设备在接收到请求设备发送的测距请求后，测量测距请求的信号强度，得到第一接收信号强度指示RSSI；响应设备基于第一RSSI和蓝牙测距模型，得到第一距离；蓝牙测距模型是基于距请求设备的预设距离和预设距离下修正后的RSSI的对应关系拟合得到的，修正后的RSSI为请求设备广播蓝牙信号时在距请求设备同一距离的多个空间位置测到的多个RSSI和多个空间位置对应的权重处理得到的；响应设备将第一距离发送至请求设备。实施本申请实施例，可以准确测量设备之间的距离，提高用户体验。

Description

一种蓝牙测距方法、电子设备及系统
本申请要求在2022年10月25日提交中国国家知识产权局、申请号为202211311517.3的中国专利申请的优先权，发明名称为“一种蓝牙测距方法、电子设备及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及终端技术，尤其涉及一种蓝牙测距方法、电子设备及系统。
背景技术
随着分布式操作系统的逐步发展，多设备协同逐渐成为提升用户体验中非常重要的一环。倘若能够及时感知到协同设备间的距离，将更有利于判断用户对于协同设备的关注程度，从而能够让开发人员设计更加个性化的软件程序。
如何测量两个协同设备间的距离，是业界亟需解决的问题。
发明内容
本申请提供了一种蓝牙测距方法、电子设备及系统，该蓝牙测距方法中，测距设备基于协同设备的蓝牙信号的RSSI和蓝牙测距模型，得到两个设备之间的距离；蓝牙测距模型是基于多个空间位置对应的权重处理得到的。实施本申请实施例，可以准确测量设备之间的距离，提高用户体验。
第一方面，本申请实施例提供了一种蓝牙测距方法，该方法包括：
响应设备与请求设备建立蓝牙通信连接；
响应设备在接收到请求设备发送的测距请求后，测量测距请求的信号强度，得到第一接收信号强度指示RSSI；
响应设备基于第一RSSI和蓝牙测距模型，得到第一距离；蓝牙测距模型是基于距请求设备的预设距离和预设距离下修正后的RSSI的对应关系拟合得到的，修正后的RSSI为请求设备广播蓝牙信号时在距请求设备同一距离的多个空间位置测到的多个RSSI和多个空间位置对应的权重处理得到的；
响应设备将第一距离发送至请求设备。
本申请实施例中，通过上述蓝牙测距模型确定设备之间的距离，该蓝牙测距模型是基于不同空间位置的权重得到的，因此，可以提高特定空间位置的距离测量精度，提高用户体验；本申请实施例可以适用于可移动的终端设备，可以提高可移动设备协同的过程中的测距精度。
另外，由于低功耗蓝牙广泛存在于各类终端设备之中，大多数场景下若需要设备间协同均需使用到低功耗蓝牙的通讯功能，本申请实施例通过对蓝牙模块的一些固有参数分析，可以推算出设备间的大致距离，不需要附加其他测距设备，可以降低因测距所带来的附加功耗。
可以理解的，本申请需在设备进行蓝牙通讯时，附加一个蓝牙接收信号强度参数即可实现测距，不需要附加额外测距设备。
结合第一方面，在一种可能的实现方式中，修正后的RSSI为多个RSSI分别乘以多个空间位置对应的权重后相加得到的。
结合第一方面，在一种可能的实现方式中，响应设备与请求设备距离相同且位置不同时，第一距离的大小不同。
结合第一方面，在一种可能的实现方式中，响应设备相对于请求设备的空间位置为第一空间位置时，第一距离为d1，第一空间位置的权重为第一权重的；响应设备相对于请求设备的空间位置为第二空间位置时，第一距离为d2，第二空间位置的权重为第二权重；第一权重高于第二权重；
第一空间位置和第二空间位置距请求设备的距离均为d时，d1与d的差值小于d2与d的差值；d1、d2和d均为正数。
其中，空间位置是指两个设备之间的相对位置，例如，响应设备相对于请求设备的空间位置为第一空间位置即是，响应设备位于请求设备的左边。
本申请实施例中，由于拟合蓝牙测距模型时空间位置的权重不同，该蓝牙测距模型对于不同空间位置的距离精度不同，因此，在权重高的空间位置的测距能力更高。
结合第一方面，在一种可能的实现方式中，空间位置的权重是基于用户使用请求设备与其他设备进行蓝牙通信时其他设备的位置数据得到的。
本申请实施例中，可以基于用户的使用协同设备的用户习惯确定空间权重，从而提高用户体验。该方法可以通过分析用户常用设备协同方位，对不同的设备空间状态进行权重划分并加以矫正，使得本方法在用户常用方位能够有更好的体验。
在一种可能的实现方式中，可以基于用户使用测距设备时协同设备的惯用位置来确定空间位置的权重，假设用户在使用测距设备与协同设备协同时，协同设备通常位于测距设备的左右两侧，则可以将位于测距设备的左右两侧的空间位置的权重增加，减少其他空间位置的权重。
结合第一方面，在一种可能的实现方式中，响应设备基于第一RSSI和蓝牙测距模型，得到第一距离，包括：
响应设备将第一RSSI输入蓝牙测距模型，得到第二距离；
响应设备在确定响应设备位于请求设备的蓝牙天线的预设增益方向时，对第二距离进行处理，得到第一距离。
本申请实施例考虑到蓝牙天线的增益方向，可以提高第一距离的准确度。
结合第一方面，在一种可能的实现方式中，响应设备在确定响应设备位于请求设备的蓝牙天线的预设增益方向时，对第二距离进行处理，包括：
响应设备在确定响应设备位于请求设备的蓝牙天线的最大增益方向时，将第二距离乘以预设倍数，得到第一距离。
本申请实施例考虑到响应设备位于请求设备的蓝牙天线的最大增益方向时RSSI较强，因此得到的距离往往偏小，因此，本申请实施例将得到距离乘以大于1的矫正系数，可以得到更加准确的距离。
在一种可能的实现方式中，响应设备在确定响应设备不位于请求设备的蓝牙天线的最大增益方向时，将第二距离乘以矫正系数，得到第一距离，其中，该矫正系数可以为小于1的数值。
结合第一方面，在一种可能的实现方式中，第一RSSI包括至少两个RSSI参数，方法还包括：
响应设备计算至少两个RSSI参数的变化率；
响应设备在至少两个RSSI参数的变化率超过预设阈值时，确定响应设备位于请求设备的蓝牙天线的最大增益方向。
结合第一方面，在一种可能的实现方式中，响应设备在接收到请求设备发送的测距请求后，测量测距请求的信号强度，得到第一信号强度测量值RSSI，包括：
响应设备在接收到请求设备发送的测距请求后，测量测距请求的信号强度，得到第二RSSI；
响应设备对第二RSSI进行滤波，得到第一RSSI。
本申请实施例中，针对测量到的RSSI值的波动现象，可以通过滤波，从而得到稳定、平滑的第一RSSI。本申请实施例对确定目标RSSI的滤波方法不作限定，滤波方法包括但不限于均值滤波、高斯滤波或者中值滤波与高斯滤波混合的数据处理方法等。
第二方面，本申请实施例提供了一种蓝牙测距方法，该方法包括：
请求设备与响应设备建立蓝牙通信连接；
请求设备向响应设备发送参数请求；参数请求用于请求测量参数请求的信号强度以得到第一接收信号强度指示RSSI；
请求设备接收响应设备发送的第一RSSI；
请求设备基于第一RSSI和蓝牙测距模型，得到第一距离；蓝牙测距模型是基于距请求设备的预设距离和预设距离下修正后的RSSI的对应关系拟合得到的，修正后的RSSI为请求设备广播蓝牙信号时在距请求设备同一距离的多个空间位置测到的多个RSSI和多个空间位置对应的权重处理得到的。
本申请实施例中，通过上述蓝牙测距模型确定设备之间的距离，该蓝牙测距模型是基于不同空间位置的权重得到的，因此，可以提高特定空间位置的距离测量精度，提高用户体验；本申请实施例可以适用于可移动的终端设备，可以提高可移动设备协同的过程中的测距精度。
另外，由于低功耗蓝牙广泛存在于各类终端设置之中，大多数场景下，若需要设备间协同均需使用 到低功耗蓝牙的通讯功能，本申请实施例通过对蓝牙模块的一些固有参数分析，可以推算出设备间的大致距离，不需要附加其他测距设备，可以降低因测距所带来的附加功耗。
结合第二方面，在一种可能的实现方式中，修正后的RSSI为多个RSSI分别乘以多个空间位置对应的权重后相加得到的。
结合第二方面，在一种可能的实现方式中，响应设备与请求设备距离相同且位置不同时，第一距离的大小不同。
结合第二方面，在一种可能的实现方式中，空间位置的权重是基于用户使用请求设备与其他设备进行蓝牙通信时其他设备的位置数据得到的。
结合第二方面，在一种可能的实现方式中，请求设备基于第一RSSI和蓝牙测距模型，得到第一距离，包括：
请求设备将第一RSSI输入蓝牙测距模型，得到第二距离；
请求设备在确定响应设备位于请求设备的蓝牙天线的预设增益方向时，对第二距离进行处理，得到第一距离。
结合第二方面，在一种可能的实现方式中，请求设备在确定响应设备位于请求设备的蓝牙天线的预设增益方向时，对第二距离进行处理，包括：
请求设备在确定响应设备位于请求设备的蓝牙天线的最大增益方向时，将第二距离乘以预设倍数，得到第一距离。
结合第二方面，在一种可能的实现方式中，第一RSSI包括至少两个RSSI参数，方法还包括：
请求设备计算至少两个RSSI参数的变化率；
请求设备在至少两个RSSI参数的变化率超过预设阈值时，确定所述响应设备位于所述请求设备的蓝牙天线的最大增益方向。
第三方面，本申请实施例提供了一种电子设备，包括一个或多个功能模块，该一个或多个功能模块可用于执行如上述第一方面中任一项可能的实现方式中的蓝牙测距方法。
第四方面，本申请实施例提供了一种电子设备，包括一个或多个功能模块，该一个或多个功能模块可用于执行如上述第二方面中任一项可能的实现方式中的蓝牙测距方法。
第五方面，本申请提供了一种计算机存储介质，包括计算机指令，当计算机指令在电子设备上运行时，使得通信装置执行上述第一方面任一项可能的实现方式中的蓝牙测距方法。
第六方面，本申请提供了一种计算机存储介质，包括计算机指令，当计算机指令在电子设备上运行时，使得通信装置执行上述第二方面任一项可能的实现方式中的蓝牙测距方法。
第七方面，本申请提供了一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行上述第一方面任一项可能的实现方式中的蓝牙测距方法。
第八方面，本申请提供了一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行上述第二方面任一项可能的实现方式中的蓝牙测距方法。
第九方面，本申请提供了一种芯片，包括：处理器和接口，所述处理器和接口相互配合，使得所述芯片执行上述第一方面任一项可能的实现方式中的蓝牙测距方法。
第十方面，本申请提供了一种芯片，包括：处理器和接口，所述处理器和接口相互配合，使得所述芯片执行上述第二方面任一项可能的实现方式中的蓝牙测距方法。
可以理解地，上述第三方面和第四方面提供的电子设备、第五方面和第六方面提供的计算机可读存储介质、第七方面和第八方面提供的计算机程序产品、第九方面和第十方面提供的芯片均用于执行本申请实施例所提供的方法。因此，其所能达到的有益效果可参考对应方法中的有益效果，此处不再赘述。
附图说明
图1是本申请实施例提供的一种蓝牙测距系统的示意图；
图2是本申请实施例提供的一种多设备协同场景下的蓝牙测距系统的示意图；
图3是本申请实施例提供的一种电子设备100的硬件结构示意图；
图4是本申请实施例提供的一种电子设备100的软件结构框图；
图5A是本申请实施例提供的一种电子设备200的硬件结构示意图；
图5B是本申请实施例提供的一种蓝牙测距方法流程图；
图6是本申请实施例提供的另一种蓝牙测距方法流程图；
图7是本申请实施例提供的一种确定蓝牙测距模型的方法流程图；
图8是本申请实施例提供的一种不同空间位置的示意图；
图9是本申请实施例提供的一种空间位置的权重的示意图；
图10是本申请实施例提供的又一种蓝牙测距方法的示意图；
图11是本申请实施例提供的再一种蓝牙测距方法流程图。
具体实施方式
下面将结合附图对本申请实施例中的技术方案进行清楚、详尽地描述。其中，在本申请实施例的描述中，除非另有说明，“/”表示或的意思，例如，A/B可以表示A或B；文本中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，另外，在本申请实施例的描述中，“多个”是指两个或多于两个。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为暗示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征，在本申请实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
本申请以下实施例中的术语“用户界面(user interface，UI)”，是应用程序或操作系统与用户之间进行交互和信息交换的介质接口，它实现信息的内部形式与用户可以接收形式之间的转换。用户界面是通过java、可扩展标记语言(extensible markup language，XML)等特定计算机语言编写的源代码，界面源代码在电子设备上经过解析，渲染，最终呈现为用户可以识别的内容。用户界面常用的表现形式是图形用户界面(graphic user interface，GUI)，是指采用图形方式显示的与计算机操作相关的用户界面。它可以是在电子设备的显示屏中显示的文本、图标、按钮、菜单、选项卡、文本框、对话框、状态栏、导航栏、Widget等可视的界面元素。
目前，蓝牙测距方法均为室内场景。现有的蓝牙测距方法通常考虑的是，蓝牙信号在室内传播过程中受到多路径、反射、非视距等因素从而导致蓝牙信号值存在波动性、奇异值的问题，因此会根据实际环境利用最小二乘法的分段拟合测距模型，进而，根据拟合的测距模型与处理后的接收信号强度指示(Received Signal Strength Indication，RSSI)，得到测距信息。但是，由于该方法针对的是室内蓝牙测距场景，因此，该方法中可在确定位置方向设置蓝牙发射节点，其并未考虑蓝牙天线传输的方向性等因素；另外，该方法中蓝牙设备发射源处于静止状态，并未考虑发射源可移动场景。
由于上述蓝牙测距方法针对的是室内固定设备，本申请的发明人发现在蓝牙设备位置可移动的情况下，上述蓝牙测距方法测量的距离不准确，无法满足用户需求。
因此，本申请实施例提出了一种蓝牙测距方法、电子设备和系统，该方法中蓝牙测距模型是基于多个空间位置的权重拟合得到的，可以准确测量设备之间的距离，提高用户体验。
本申请可以应用于两个设备协同的场景或者多设备协同场景，例如投屏以及遥控等场景等。例如在未来驾驶舱场景下，发送端周边的终端设备可能包括抬头显示仪、液晶仪表盘、车载中控屏等，这些均可以作为本申请实施例中的接收端。又例如，发送端为投屏设备时，接收端可以为被投屏设备，可同时包括：平板电脑、个人电脑、电视、车机、智能手表、耳机、音响、虚拟现实设备和增强现实设备等。或者根据实际需求，可以减少或添加更多其他设备。
为了更加清楚、详细地介绍本申请实施例提供的蓝牙测距方法，下面先介绍本申请实施例提供的蓝牙测距系统10。
请参见图1、图1为本申请实施例提供的一种蓝牙测距系统10的架构示意图。如图1所示，该蓝牙测距系统10可包括：第一电子设备101和第二电子设备102。
其中，第一电子设备101与第二电子设备102可以通过蓝牙技术(包括经典蓝牙BR/EDR(Basic Rate/Enhanced Data Rate)或低功耗蓝牙(bluetooth low energy，BLE))进行通信。进而，在通信过程中，第一电子设备101或第二电子设备102可以测量两个设备之间的距离。
在一些实施例中，第一电子设备101或第二电子设备102在进行蓝牙通信过程中，第一电子设备101 可以向第二电子设备102发送测距请求；进而，第二电子设备102在接收到第一电子设备101发送的测距请求后，测量测距请求的信号强度，得到第一接收信号强度指示RSSI；第二电子设备102基于第一RSSI和蓝牙测距模型，得到第一距离；蓝牙测距模型是基于距第一电子设备101的预设距离和预设距离下修正后的RSSI的对应关系拟合得到的，修正后的RSSI为第一电子设备101广播蓝牙信号时在距第一电子设备101同一距离的多个空间位置测到的多个RSSI和多个空间位置对应的权重处理得到的；第二电子设备102将第一距离发送至第一电子设备101。那么，第一电子设备101和第二电子设备102可以基于两者之间的距离，调整各自的协同状态，例如提示消息以使用户调整距离等。
其中，拟合蓝牙测距模型的具体过程以及获取第一距离的具体过程，可以参见下文中实施例的相关内容，在此不作展开。
第一电子设备101可以是手机、笔记本电脑、掌上电脑等等支持蓝牙功能的终端设备。第二电子设备102也可以是手机、笔记本电脑、掌上电脑等等支持蓝牙功能的终端设备。第二电子设备102还可以是无线耳机、智能音箱、智能手表等支持蓝牙功能的外围设备。
其中，在本申请实施例中，第一电子设备101和第二电子设备102可以是手机、平板电脑、桌面型计算机、膝上型计算机、手持计算机、笔记本电脑、超级移动个人计算机(ultra-mobile personal computer，UMPC)、上网本，以及蜂窝电话、个人数字助理(personal digital assistant，PDA)、增强现实(augmented reality，AR)设备、虚拟现实(virtual reality，VR)设备、人工智能(artificial intelligence,AI)设备、可穿戴式设备、车载设备、智能家居设备和/或智慧城市设备等等。
需要是说明的是，上述蓝牙测距系统10仅示例性示出了两个设备。
在本申请实施例中，蓝牙测距系统可以包括多个设备。请参见图2，图2示例性示出了多设备协同场景下的蓝牙测距系统20。
如图2所示，该系统可以包括手机、平板和手表，其中，手机和手表建立蓝牙连接；手机与平板建立蓝牙连接，手表和平板建立蓝牙连接。
在一种实现中，测量设备可以为三个设备中的任一个，例如测量设备可以是三个设备中计算能力最强的一个；三个设备也可以均是测量设备。示例性的，测量设备为手机，则手机在通过蓝牙连接后测量得到与手表的第一距离和与平板的第二距离，可以将第一距离发送至手表，将第二距离发送至平板。
在另一些实施例中，多设备协同场景中也可以是一个主设备分别连接多个从设备，例如手机为主设备，手机分别与手表、平板以及音箱等协同设备建立蓝牙连接。
可以理解的，本申请可以应用在空间多设备协同的应用场景中，例如家居场景以及办公场景等，在蓝牙正常通讯的同时附加测距能力以识别设备间的距离情况，从而更好的分析各个设备协同状态。
首先，示例性介绍第一电子设备101的硬件结构和软件架构。
图3示出了电子设备100的硬件结构示意图。
下面以第一电子设备101为电子设备100为例对实施例进行具体说明。应该理解的是，电子设备100可以具有比图中所示的更多的或者更少的部件，可以组合两个或多个的部件，或者可以具有不同的部件配置。图中所示出的各种部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件、或硬件和软件的组合中实现。
电子设备100可以包括：处理器110，外部存储器接口120，内部存储器121，通用串行总线(universal serial bus，USB)接口130，充电管理模块140，电源管理模块141，电池142，天线1，天线2，移动通信模块150，无线通信模块160，音频模块170，扬声器170A，受话器170B，麦克风170C，耳机接口170D，传感器模块180，按键190，马达191，指示器192，摄像头193，显示屏194以及用户标识模块(subscriber identification module，SIM)卡接口195等。其中传感器模块180可以包括压力传感器180A，陀螺仪传感器180B，气压传感器180C，磁传感器180D，加速度传感器180E，距离传感器180F，接近光传感器180G，指纹传感器180H，温度传感器180J，触摸传感器180K，环境光传感器180L，骨传导传感器180M等。
可以理解的是，本申请实施例示意的结构并不构成对电子设备100的具体限定。在本申请另一些实施例中，电子设备100可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
处理器110可以包括一个或多个处理单元，例如：处理器110可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor，ISP)，控制器，存储器，视频编解码器，数字信号处理器(digital signal processor，DSP)，基带处理器，和/或神经网络处理器(neural-network processing unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。
其中，控制器可以是电子设备100的神经中枢和指挥中心。控制器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。
处理器110中还可以设置存储器，用于存储指令和数据。在一些实施例中，处理器110中的存储器为高速缓冲存储器。该存储器可以保存处理器110刚用过或循环使用的指令或数据。如果处理器110需要再次使用该指令或数据，可从所述存储器中直接调用。避免了重复存取，减少了处理器110的等待时间，因而提高了系统的效率。
在一些实施例中，处理器110可以包括一个或多个接口。接口可以包括集成电路(inter-integrated circuit，I2C)接口，集成电路内置音频(inter-integrated circuit sound，I2S)接口，脉冲编码调制(pulse code modulation，PCM)接口，通用异步收发传输器(universal asynchronous receiver/transmitter，UART)接口，移动产业处理器接口(mobile industry processor interface，MIPI)，通用输入输出(general-purpose input/output，GPIO)接口，用户标识模块(subscriber identity module，SIM)接口，和/或通用串行总线(universal serial bus，USB)接口等。
I2C接口是一种双向同步串行总线，包括一根串行数据线(serial data line，SDA)和一根串行时钟线(derail clock line，SCL)。在一些实施例中，处理器110可以包含多组I2C总线。处理器110可以通过不同的I2C总线接口分别耦合触摸传感器180K，充电器，闪光灯，摄像头193等。例如：处理器110可以通过I2C接口耦合触摸传感器180K，使处理器110与触摸传感器180K通过I2C总线接口通信，实现电子设备100的触摸功能。
I2S接口可以用于音频通信。在一些实施例中，处理器110可以包含多组I2S总线。处理器110可以通过I2S总线与音频模块170耦合，实现处理器110与音频模块170之间的通信。在一些实施例中，音频模块170可以通过I2S接口向无线通信模块160传递音频信号，实现通过蓝牙耳机接听电话的功能。
PCM接口也可以用于音频通信，将模拟信号抽样，量化和编码。在一些实施例中，音频模块170与无线通信模块160可以通过PCM总线接口耦合。在一些实施例中，音频模块170也可以通过PCM接口向无线通信模块160传递音频信号，实现通过蓝牙耳机接听电话的功能。所述I2S接口和所述PCM接口都可以用于音频通信。
UART接口是一种通用串行数据总线，用于异步通信。该总线可以为双向通信总线。它将要传输的数据在串行通信与并行通信之间转换。在一些实施例中，UART接口通常被用于连接处理器110与无线通信模块160。例如：处理器110通过UART接口与无线通信模块160中的蓝牙模块通信，实现蓝牙功能。在一些实施例中，音频模块170可以通过UART接口向无线通信模块160传递音频信号，实现通过蓝牙耳机播放音乐的功能。
MIPI接口可以被用于连接处理器110与显示屏194，摄像头193等外围器件。MIPI接口包括摄像头串行接口(camera serial interface，CSI)，显示屏串行接口(display serial interface，DSI)等。在一些实施例中，处理器110和摄像头193通过CSI接口通信，实现电子设备100的拍摄功能。处理器110和显示屏194通过DSI接口通信，实现电子设备100的显示功能。
GPIO接口可以通过软件配置。GPIO接口可以被配置为控制信号，也可被配置为数据信号。在一些实施例中，GPIO接口可以用于连接处理器110与摄像头193，显示屏194，无线通信模块160，音频模块170，传感器模块180等。GPIO接口还可以被配置为I2C接口，I2S接口，UART接口，MIPI接口等。
SIM接口可以被用于与SIM卡接口195通信，实现传送数据到SIM卡或读取SIM卡中数据的功能。
USB接口130是符合USB标准规范的接口，具体可以是Mini USB接口，Micro USB接口，USB Type C接口等。USB接口130可以用于连接充电器为电子设备100充电，也可以用于电子设备100与外围设备之间传输数据。也可以用于连接耳机，通过耳机播放音频。该接口还可以用于连接其他电子设备，例如AR设备等。
可以理解的是，本申请实施例示意的各模块间的接口连接关系，只是示意性说明，并不构成对电子设备100的结构限定。在本申请另一些实施例中，电子设备100也可以采用上述实施例中不同的接口连 接方式，或多种接口连接方式的组合。
充电管理模块140用于从充电器接收充电输入。其中，充电器可以是无线充电器，也可以是有线充电器。
电源管理模块141用于连接电池142，充电管理模块140与处理器110。电源管理模块141接收电池142和/或充电管理模块140的输入，为处理器110，内部存储器121，外部存储器，显示屏194，摄像头193，和无线通信模块160等供电。
电子设备100的无线通信功能可以通过天线1，天线2，移动通信模块150，无线通信模块160，调制解调处理器以及基带处理器等实现。
天线1和天线2用于发射和接收电磁波信号。电子设备100中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块150可以提供应用在电子设备100上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块150可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。移动通信模块150可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块150还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块150的至少部分功能模块可以被设置于处理器110中。在一些实施例中，移动通信模块150的至少部分功能模块可以与处理器110的至少部分模块被设置在同一个器件中。
调制解调处理器可以包括调制器和解调器。其中，调制器用于将待发送的低频基带信号调制成中高频信号。解调器用于将接收的电磁波信号解调为低频基带信号。随后解调器将解调得到的低频基带信号传送至基带处理器处理。低频基带信号经基带处理器处理后，被传递给应用处理器。应用处理器通过音频设备(不限于扬声器170A，受话器170B等)输出声音信号，或通过显示屏194显示图像或视频。在一些实施例中，调制解调处理器可以是独立的器件。在另一些实施例中，调制解调处理器可以独立于处理器110，与移动通信模块150或其他功能模块设置在同一个器件中。
无线通信模块160可以提供应用在电子设备100上的包括无线局域网(wireless local area networks，WLAN)(如无线保真(wireless fidelity，Wi-Fi)网络)，蓝牙(bluetooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块160可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块160经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器110。无线通信模块160还可以从处理器110接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。
在一些实施例中，电子设备100的天线1和移动通信模块150耦合，天线2和无线通信模块160耦合，使得电子设备100可以通过无线通信技术与网络以及其他设备通信。所述无线通信技术可以包括全球移动通讯系统(global system for mobile communications，GSM)，通用分组无线服务(general packet radio service，GPRS)，码分多址接入(code division multiple access，CDMA)，宽带码分多址(wideband code division multiple access，WCDMA)，时分码分多址(time-division code division multiple access，TD-SCDMA)，长期演进(long term evolution，LTE)，BT，GNSS，WLAN，NFC，FM，和/或IR技术等。所述GNSS可以包括全球卫星定位系统(global positioning system，GPS)，全球导航卫星系统(global navigation satellite system，GLONASS)，北斗卫星导航系统(beidou navigation satellite system，BDS)，准天顶卫星系统(quasi-zenith satellite system，QZSS)和/或星基增强系统(satellite based augmentation systems，SBAS)。
电子设备100通过GPU，显示屏194，以及应用处理器等实现显示功能。GPU为图像处理的微处理器，连接显示屏194和应用处理器。GPU用于执行数学和几何计算，用于图形渲染。处理器110可包括一个或多个GPU，其执行程序指令以生成或改变显示信息。
显示屏194用于显示图像，视频等。显示屏194包括显示面板。显示面板可以采用液晶显示屏(liquid crystal display，LCD)，有机发光二极管(organic light-emitting diode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting diode，AMOLED)，柔性发光二极管(flex light-emitting diode，FLED)，Miniled，MicroLed，Micro-oLed，量子点发光二极管(quantum dot light  emitting diodes，QLED)等。
在一些实施例中，电子设备100可以包括1个或N个显示屏194，N为大于1的正整数。
电子设备100可以通过ISP，摄像头193，视频编解码器，GPU，显示屏194以及应用处理器等实现拍摄功能。
ISP用于处理摄像头193反馈的数据。例如，拍照时，打开快门，光线通过镜头被传递到摄像头感光元件上，光信号转换为电信号，摄像头感光元件将所述电信号传递给ISP处理，转化为肉眼可见的图像。ISP还可以对图像的噪点，亮度等进行算法优化。ISP还可以对拍摄场景的曝光，色温等参数优化。在一些实施例中，ISP可以设置在摄像头193中。
摄像头193用于捕获静态图像或视频。物体通过镜头生成光学图像投射到感光元件。感光元件可以是电荷耦合器件(charge coupled device，CCD)或互补金属氧化物半导体(complementary metal-oxide-semiconductor，CMOS)光电晶体管。感光元件把光信号转换成电信号，之后将电信号传递给ISP转换成数字图像信号。ISP将数字图像信号输出到DSP加工处理。DSP将数字图像信号转换成标准的RGB，YUV等格式的图像信号。
在一些实施例中，电子设备100可以包括1个或N个摄像头193，N为大于1的正整数。
数字信号处理器用于处理数字信号，除了可以处理数字图像信号，还可以处理其他数字信号。例如，当电子设备100在频点选择时，数字信号处理器用于对频点能量进行傅里叶变换等。
视频编解码器用于对数字视频压缩或解压缩。电子设备100可以支持一种或多种视频编解码器。这样，电子设备100可以播放或录制多种编码格式的视频，例如：动态图像专家组(moving picture experts group，MPEG)1，MPEG2，MPEG3，MPEG4等。
NPU为神经网络(neural-network，NN)计算处理器，通过借鉴生物神经网络结构，例如借鉴人脑神经元之间传递模式，对输入信息快速处理，还可以不断的自学习。通过NPU可以实现电子设备100的智能认知等应用，例如：图像识别，人脸识别，语音识别，文本理解等。
外部存储器接口120可以用于连接外部存储卡，例如Micro SD卡，实现扩展电子设备100的存储能力。外部存储卡通过外部存储器接口120与处理器110通信，实现数据存储功能。例如将音乐，视频等文件保存在外部存储卡中。
内部存储器121可以用于存储计算机可执行程序代码，所述可执行程序代码包括指令。处理器110通过运行存储在内部存储器121的指令，从而执行电子设备100的各种功能应用以及数据处理。内部存储器121可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，至少一个功能所需的应用(比如人脸识别功能，指纹识别功能、移动支付功能等)等。存储数据区可存储电子设备100使用过程中所创建的数据(比如人脸信息模板数据，指纹信息模板等)等。
此外，内部存储器121可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(universal flash storage，UFS)等。
电子设备100可以通过音频模块170，扬声器170A，受话器170B，麦克风170C，耳机接口170D，以及应用处理器等实现音频功能。例如音乐播放，录音等。
音频模块170用于将数字音频信息转换成模拟音频信号输出，也用于将模拟音频输入转换为数字音频信号。音频模块170还可以用于对音频信号编码和解码。
在一些实施例中，音频模块170可以设置于处理器110中，或将音频模块170的部分功能模块设置于处理器110中。
扬声器170A，也称“喇叭”，用于将音频电信号转换为声音信号。电子设备100可以通过扬声器170A收听音乐，或收听免提通话。
受话器170B，也称“听筒”，用于将音频电信号转换成声音信号。当电子设备100接听电话或语音信息时，可以通过将受话器170B靠近人耳接听语音。
麦克风170C，也称“话筒”，“传声器”，用于将声音信号转换为电信号。当拨打电话或发送语音信息时，用户可以通过人嘴靠近麦克风170C发声，将声音信号输入到麦克风170C。电子设备100可以设置至少一个麦克风170C。
在另一些实施例中，电子设备100可以设置两个麦克风170C，除了采集声音信号，还可以实现降噪功能。在另一些实施例中，电子设备100还可以设置三个，四个或更多麦克风170C，实现采集声音信号，降噪，还可以识别声音来源，实现定向录音功能等。
耳机接口170D用于连接有线耳机。耳机接口170D可以是USB接口130，也可以是3.5mm的开放移动电子设备平台(open mobile terminal platform，OMTP)标准接口，美国蜂窝电信工业协会(cellular telecommunications industry association of the USA，CTIA)标准接口。
压力传感器180A用于感受压力信号，可以将压力信号转换成电信号。在一些实施例中，压力传感器180A可以设置于显示屏194。压力传感器180A的种类很多，如电阻式压力传感器，电感式压力传感器，电容式压力传感器等。电容式压力传感器可以是包括至少两个具有导电材料的平行板。当有力作用于压力传感器180A，电极之间的电容改变。电子设备100根据电容的变化确定压力的强度。当有触摸操作作用于显示屏194，电子设备100根据压力传感器180A检测所述触摸操作强度。电子设备100也可以根据压力传感器180A的检测信号计算触摸的位置。在一些实施例中，作用于相同触摸位置，但不同触摸操作强度的触摸操作，可以对应不同的操作指令。
例如：当有触摸操作强度小于第一压力阈值的触摸操作作用于短消息应用图标时，执行查看短消息的指令。当有触摸操作强度大于或等于第一压力阈值的触摸操作作用于短消息应用图标时，执行新建短消息的指令。
陀螺仪传感器180B可以用于确定电子设备100的运动姿态。在一些实施例中，可以通过陀螺仪传感器180B确定电子设备100围绕三个轴(即，x，y和z轴)的角速度。陀螺仪传感器180B可以用于拍摄防抖。
示例性的，当按下快门，陀螺仪传感器180B检测电子设备100抖动的角度，根据角度计算出镜头模组需要补偿的距离，让镜头通过反向运动抵消电子设备100的抖动，实现防抖。陀螺仪传感器180B还可以用于导航，体感游戏场景。
气压传感器180C用于测量气压。在一些实施例中，电子设备100通过气压传感器180C测得的气压值计算海拔高度，辅助定位和导航。
磁传感器180D包括霍尔传感器。电子设备100可以利用磁传感器180D检测翻盖皮套的开合。在一些实施例中，当电子设备100是翻盖机时，电子设备100可以根据磁传感器180D检测翻盖的开合。进而根据检测到的皮套的开合状态或翻盖的开合状态，设置翻盖自动解锁等特性。
加速度传感器180E可检测电子设备100在各个方向上(一般为三轴)加速度的大小。当电子设备100静止时可检测出重力的大小及方向。还可以用于识别电子设备姿态，应用于横竖屏切换，计步器等应用。
距离传感器180F，用于测量距离。电子设备100可以通过红外或激光测量距离。在一些实施例中，拍摄场景，电子设备100可以利用距离传感器180F测距以实现快速对焦。
接近光传感器180G可以包括例如发光二极管(LED)和光检测器，例如光电二极管。发光二极管可以是红外发光二极管。电子设备100通过发光二极管向外发射红外光。电子设备100使用光电二极管检测来自附近物体的红外反射光。
当检测到充分的反射光时，可以确定电子设备100附近有物体。当检测到不充分的反射光时，电子设备100可以确定电子设备100附近没有物体。电子设备100可以利用接近光传感器180G检测用户手持电子设备100贴近耳朵通话，以便自动熄灭屏幕达到省电的目的。接近光传感器180G也可用于皮套模式，口袋模式自动解锁与锁屏。
环境光传感器180L用于感知环境光亮度。电子设备100可以根据感知的环境光亮度自适应调节显示屏194亮度。环境光传感器180L也可用于拍照时自动调节白平衡。环境光传感器180L还可以与接近光传感器180G配合，检测电子设备100是否在口袋里，以防误触。
指纹传感器180H用于采集指纹。电子设备100可以利用采集的指纹特性实现指纹解锁，访问应用锁，指纹拍照，指纹接听来电等。
温度传感器180J用于检测温度。在一些实施例中，电子设备100利用温度传感器180J检测的温度，执行温度处理策略。例如，当温度传感器180J上报的温度超过阈值，电子设备100执行降低位于温度传感器180J附近的处理器的性能，以便降低功耗实施热保护。在另一些实施例中，当温度低于另一阈值时，电子设备100对电池142加热，以避免低温导致电子设备100异常关机。在其他一些实施例中，当温度低于又一阈值时，电子设备100对电池142的输出电压执行升压，以避免低温导致的异常关机。
触摸传感器180K，也称“触控面板”。触摸传感器180K可以设置于显示屏194，由触摸传感器180K与显示屏194组成触摸屏，也称“触控屏”。触摸传感器180K用于检测作用于其上或附近的触摸操作。 触摸传感器可以将检测到的触摸操作传递给应用处理器，以确定触摸事件类型。可以通过显示屏194提供与触摸操作相关的视觉输出。在另一些实施例中，触摸传感器180K也可以设置于电子设备100的表面，与显示屏194所处的位置不同。
按键190包括开机键，音量键等。按键190可以是机械按键。也可以是触摸式按键。电子设备100可以接收按键输入，产生与电子设备100的用户设置以及功能控制有关的键信号输入。
马达191可以产生振动提示。马达191可以用于来电振动提示，也可以用于触摸振动反馈。例如，作用于不同应用(例如拍照，音频播放等)的触摸操作，可以对应不同的振动反馈效果。作用于显示屏194不同区域的触摸操作，马达191也可对应不同的振动反馈效果。不同的应用场景(例如：时间提醒，接收信息，闹钟，游戏等)也可以对应不同的振动反馈效果。触摸振动反馈效果还可以支持自定义。
指示器192可以是指示灯，可以用于指示充电状态，电量变化，也可以用于合成请求，未接来电，通知等。
SIM卡接口195用于连接SIM卡。SIM卡可以通过插入SIM卡接口195，或从SIM卡接口195拔出，实现和电子设备100的接触和分离。电子设备100可以支持1个或N个SIM卡接口，N为大于1的正整数。SIM卡接口195可以支持Nano SIM卡，Micro SIM卡，SIM卡等。同一个SIM卡接口195可以同时插入多张卡。所述多张卡的类型可以相同，也可以不同。SIM卡接口195也可以兼容不同类型的SIM卡。SIM卡接口195也可以兼容外部存储卡。电子设备100通过SIM卡和网络交互，实现通话以及数据通信等功能。
本申请实施例中，电子设备100可以通过处理器110和无线通信模块160执行所述蓝牙测距方法。其中，本申请实施例所述的方法由图3所示的电子设备100的无线通信模块160来实现的部分内容，具体可以是蓝牙模块或者是蓝牙芯片来执行。
图4为本申请实施例公开的一种电子设备100的软件结构框图。
分层架构将软件分成若干个层，每一层都有清晰的角色和分工。层与层之间通过软件接口通信。在一些实施例中，将系统分为四层，从上至下分别为应用程序层，应用程序框架层，运行时(Runtime)和系统库，以及内核层。
应用程序层可以包括一系列应用程序包。
如图4所示，应用程序层还包括蓝牙模块，应用程序包可以包括相机，图库，日历，通话，地图，导航，WLAN，音乐，视频，短信息等应用程序(也可以称为应用)。
应用程序框架层为应用程序层的应用程序提供应用编程接口(application programming interface，API)和编程框架。应用程序框架层包括一些预先定义的函数。
如图4所示，应用程序框架层可以包括窗口管理器，内容提供器，视图系统，电话管理器，资源管理器，通知管理器等。
窗口管理器用于管理窗口程序。窗口管理器可以获取显示屏大小，判断是否有状态栏，锁定屏幕，截取屏幕等。
内容提供器用来存放和获取数据，并使这些数据可以被应用程序访问。所述数据可以包括视频，图像，音频，拨打和接听的电话，浏览历史和书签，电话簿等。
视图系统包括可视控件，例如显示文字的控件，显示图片的控件等。视图系统可用于构建应用程序。显示界面可以由一个或多个视图组成的。例如，包括短信通知图标的显示界面，可以包括显示文字的视图以及显示图片的视图。
电话管理器用于提供电子设备100的通信功能。例如通话状态的管理(包括接通，挂断等)。
资源管理器为应用程序提供各种资源，比如本地化字符串，图标，图片，布局文件，视频文件等等。
通知管理器使应用程序可以在状态栏中显示通知信息，可以用于传达告知类型的消息，可以短暂停留后自动消失，无需用户交互。比如通知管理器被用于告知下载完成，消息提醒等。通知管理器还可以是以图表或者滚动条文本形式出现在系统顶部状态栏的通知，例如后台运行的应用程序的通知，还可以是以对话界面形式出现在屏幕上的通知。例如在状态栏提示文本信息，发出提示音，电子设备振动，指示灯闪烁等。
运行时(Runtime)包括核心库和虚拟机。Runtime负责系统的调度和管理。
核心库包含两部分：一部分是编程语言(例如，jave语言)需要调用的功能函数，另一部分是系统的 核心库。
应用程序层和应用程序框架层运行在虚拟机中。虚拟机将应用程序层和应用程序框架层的编程文件(例如，jave文件)执行为二进制文件。虚拟机用于执行对象生命周期的管理，堆栈管理，线程管理，安全和异常的管理，以及垃圾回收等功能。
系统库可以包括多个功能模块。例如：表面管理器(surface manager)，媒体库(Media Libraries)，三维图形处理库(例如：OpenGL ES)，二维图形引擎(例如：SGL)等。
表面管理器用于对显示子系统进行管理，并且为多个应用程序提供了二维(2-Dimensional，2D)和三维(3-Dimensional，3D)图层的融合。
媒体库支持多种常用的音频，视频格式回放和录制，以及静态图像文件等。媒体库可以支持多种音视频编码格式，例如:MPEG4，H.264，MP3，AAC，AMR，JPG，PNG等。
三维图形处理库用于实现3D图形绘图，图像渲染，合成，和图层处理等。
2D图形引擎是2D绘图的绘图引擎。
内核层是硬件和软件之间的层。内核层至少包含显示驱动，摄像头驱动，音频驱动，传感器驱动，虚拟卡驱动。
下面结合捕获拍照场景，示例性说明电子设备100软件以及硬件的工作流程。
当触摸传感器180K接收到触摸操作，相应的硬件中断被发给内核层。内核层将触摸操作加工成原始输入事件(包括触摸坐标，触摸操作的时间戳等信息)。原始输入事件被存储在内核层。应用程序框架层从内核层获取原始输入事件，识别该输入事件所对应的控件。以该触摸操作是触摸单击操作，该单击操作所对应的控件为相机应用图标的控件为例，相机应用调用应用框架层的接口，启动相机应用，进而通过调用内核层启动摄像头驱动，通过摄像头193捕获静态图像或视频。
本申请实施例中，当第二电子设备102是手机、笔记本电脑或者掌上电脑时，第二电子设备的结构示意图可类似电子设备100，这里不再赘述。当第二电子设备102为无线耳机、智能音箱、智能手表等设备时，第二电子设备102的结构示意图参考图5A所示的电子设备200。
图5A示例性的示出了本申请实施例提供的电子设备200的结构示意图。
下面以电子设备200为例对实施例进行具体说明。应该理解的是，图5A所示电子设备200仅是一个范例，并且电子设备200可以具有比图5A中所示的更多或更少的部件，可以组合两个或多个的部件，或者可以具有不同的部件配置。图中所示出的各种部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件、或硬件和软件的组合中实现，
如图5A所示，电子设备200可以包括：处理器201，存储器202，蓝牙通信模块203，天线204，电源开关205，USB通信处理模块206，音频模块207。其中：
处理器201可用于读取和执行计算机可读指令。具体实现中，处理器201可主要包括控制器、运算器和寄存器。其中，控制器主要负责指令译码，并为指令对应的操作发出控制信号。运算器主要负责保存指令执行过程中临时存放的寄存器操作数和中间操作结果等。具体实现中，处理器201的硬件架构可以是专用集成电路(ASIC)架构、MIPS架构、ARM架构或者NP架构等等。
在一些实施例中，处理器201可以用于解析蓝牙通信模块203接收到的信号，如第一电子设备101发送的配对模式修改请求，等等。处理器201可以用于根据解析结果进行相应的处理操作，如生成配对模式修改响应，等等。
存储器202与处理器201耦合，用于存储各种软件程序和/或多组指令。具体实现中，存储器202可包括高速随机存取的存储器，并且也可包括非易失性存储器，例如一个或多个磁盘存储设备、闪存设备或其他非易失性固态存储设备。存储器202可以存储操作系统，例如uCOS，VxWorks、RTLinux等嵌入式操作系统。存储器202还可以存储通信程序，该通信程序可用于与第一电子设备101，一个或多个服务器，或其他设备进行通信。
蓝牙通信模块203可以包括低功耗蓝牙(BLE)模块；还可以包括经典蓝牙(BR/EDR)模块。
在一些实施例中，蓝牙通信模块203、可以监听到其他设备(如第一电子设备101)发射的信号，如探测请求、扫描信号等等，并可以发送响应信号、扫描响应等，使得其他设备(如第一电子设备101)可以发现电子设备200，并去其他设备(如第一电子设备101)建立无线通信连接，通过蓝牙与其他设备(如第一电子设备101)进行通信。
在另一些实施例中，蓝牙通信模块203也可以发射信号，如广播BLE信号，使得其他设备(如第一电子设备101)可以发现电子设备200，并与其他设备(如第一电子设备101)建立无线通信连接，通过蓝牙与其他设备(如第一电子设备101)进行通信。
电子设备200的无线通信功能可以通过天线204，蓝牙通信模块203，调制解调处理器等实现。
天线204可用于发射和接收电磁波信号。电子设备200中的每个天线可用于覆盖单个或多个通信频带。
在一些实施例中蓝牙通信模块203的天线可以有一个或多个。
电源开关205可用于控制电源向电子设备200的供电。
USB通信处理模块206可用于通过USB接口(未示出)与其他设备进行通信。
音频模块207可用于通过音频输出接口输出音频信号，这样可使得电子设备200支持音频播放。音频模块207还可用于通过音频输入接口接收音频数据。电子设备200可以为蓝牙耳机等媒体播放设备。
在一些实施例中，电子设备200还可以包括显示屏(未示出)，其中，该显示屏可用于显示图像，提示信息等。显示屏可以采用液晶显示屏(liquid crystal display，LCD)，有机发光二极管(organic light-emitting diode，OLED)显示屏，有源矩阵有机发光二极体(active-matrix organic light emitting diode，AMOLED)显示屏，柔性发光二极管(flexible light-emitting diode，FLED)显示屏，量子点发光二极管(quantum dotlight emitting diodes，QLED)显示屏等等。
在一些实施例中，电子设备200还可以包括RS-232接口等串行接口。该串行接口可连接至其他设备，如音箱等音频外放设备，使得电子设备200和音频外放设备协作播放音视频。
可以理解的是图5A示意的结构并不构成对电子设备200的具体限定。在本申请另一些实施例中，电子设备200可以包括比图示更多或更少的部件，或组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
可以理解的是图5A示意的结构并不构成对电子设备200的具体限定。在本申请另一些实施例中，电子设备200可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
在一些实施例中，电子设备200可以包括上述图5A中所示的结构包括的硬件。图中所示出的各种部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件、或硬件和软件的组合中实现。
电子设备200的软件系统可以采用分层架构，事件驱动架构，微核架构，微服务架构，或云架构等等。示例性地，电子设备200的软件系统可以包括但不限于Linux或者其它操作系统。为华为的鸿蒙系统。
在一些实施例中，电子设备200为Android系统，分为四层，从上至下分别为应用程序层，应用程序框架层，安卓运行时和系统库，以及内核层。其中，应用程序层可以包括投屏管理的应用用于设备连接和投屏显示，应用程序框架层可以包括事件管理器，窗口管理器和显示管理器等，系统库可以包括媒体库和事件数据等，内核层用于设备发现，设备认证和设备连接等，其中各部分内容具体可以参见图5A中的相关描述，此处不再赘述。
基于图3和图4所示的电子设备100的硬件和软件结构示意图、图5A所示的电子设备200的硬件结构示意图，以下通过图5B介绍本申请实施例提供的蓝牙测距方法。
图5B示例性示出了第一电子设备和第二电子设备的系统架构，其中，第一电子设备和第二电子设备均为鸿蒙系统。如图5B所示，首先，执行第一个步骤(BLE发现)：即第一电子设备和第二电子设备通过其各自的蓝牙芯片，通过BLE发现对方设备；进而，执行第二个步骤(广播测距指令)：第一电子设备通过自身的蓝牙接口和蓝牙芯片广播测距指令，第二电子设备通过自身的蓝牙接口和蓝牙芯片接收扫描接收该指令；最后，执行第三个步骤(非链接测距)：第二电子设备获取该指令对应的RSSI参数，进而，第二电子设备基于组播源发现协议(Multicast Source Discovery Protocol，MSDP)，通过软总线协同的方式将该RSSI参数发送至第一电子设备，第一电子设备基于上述RSSI参数进行距离测算，具体测算过程可以参见下文中第二电子设备基于RSSI参数进行距离测算的相关内容。
下面基于图1所示的蓝牙测距系统10的示意图、图3和图4所示的电子设备100的硬件和软件结构示意图、图5A所示的电子设备200的硬件结构示意图，来详细描述本申请实施例提供的蓝牙测距方法。
以两个设备为例，图6示例性示出了本申请实施例提供的另一种蓝牙测距方法流程。该蓝牙测距方 法可以包括以下部分或全部步骤：
需要说明的是，本申请实施例中，用户操作为用户的触控操作(例如点击操作、长按操作、上滑操作、下滑操作或侧滑操作)，也可以为非接触操作(例如隔空手势)，还可以为用户的语音指令，本申请实施例对此不做具体限制。
步骤S601：第一电子设备与第二电子设备建立蓝牙通信连接。
在一些实施例中，第一电子设备在检测到开启蓝牙的用户操作时，响应于该用户操作，向第二电子设备发送连接请求，并侦听第二电子设备的广播信号；第一电子设备在侦听到来自第二电子设备的广播信号时，进行响应以建立起第一电子设备与第二电子设备的BLE连接。
例如，用户可以打开手机、电脑的蓝牙功能并建立蓝牙连接。用户可以打开手机中的蓝牙；进而，手机检测到用户针对蓝牙的用户操作，手机可以显示搜索到开启蓝牙的设备列表，例如，设备列表中包括电脑的标识。进而，如果检测到用户选中设备列表中电脑的标识，则手机可与电脑建立蓝牙连接。
在多设备协同的场景中，智能电视、电脑与手机建立通信连接后，智能电视、电脑与手机A构成了一个设备组。该设备组内的成员是可以动态增加或减少的。例如，第一电子设备为手机，第二电子设备可以为电脑和智能电视，也即是说，手机分别与电脑和智能电视建立了蓝牙通信连接。那么，执行本申请实施例，手机可以分别获取电脑与智能电视的距离。
步骤S602：第一电子设备向第二电子设备发送测距请求，该测距请求包括测距指令，测距指令用于请求获取与第一电子设备的距离。
在一种实现中，第一电子设备在与第二电子设备建立蓝牙通信连接后，通过BLE广播测距请求。
在另一种实现中，第一电子设备可以显示测距控件，进而，响应于用户针对测距控件的用户操作，向第二电子设备发送测距请求。例如，在第一电子设备与第二电子设备协同过程中，第一电子设备可以显示提示消息以及相关控件，其中，该提示消息用于提示用户是否需要测距，例如该提示消息为“是否检测与第二电子设备的距离”，相关控件可以包括确认控件和拒绝控件；进而，第一电子设备在检测到用户针对确认控件的用户操作，执行步骤S602，在检测到用户针对拒绝控件的用户操作，不执行步骤S602。
在另一些实施例中，第一电子设备和第二电子设备处于多设备协同的场景中，例如，第一电子设备除了与第二电子设备建立蓝牙通信连接后，还跟其他多个设备建立了蓝牙通信连接，则第一电子设备广播上述参数请求后，其他多个设备在接收到该测距请求后，也可以测量测距请求的RSSI，向第一电子设备发送测量到的RSSI以使第一电子设备可以得到与各个设备的距离信息。
步骤S603：第二电子设备在接收到上述测距请求后，获取多个测距请求的接收信号强度指示RSSI。
在一些实施例中，第二电子设备在接收到上述测距请求后，响应于该测距请求，测量接收到的多个测距请求的RSSI。此处对测量RSSI的方法不做限定。
步骤S604：第二电子设备基于多个测距请求的RSSI，确定目标RSSI。
在一些实施例中，第二电子设备可以对多个测距指令的RSSI进行滤波处理，得到目标RSSI。其中，滤波处理可以包括基于预设规则剔除多个测距指令的RSSI中的部分RSSI，以及取均值等。
需要说明的是，实际环境中无线信号的传播存在一定规律，即随着接收节点与蓝牙节点之间距离的增大，其接收的信号强度呈对数函数的形式衰减。由于在实际测距情况下，受多路径、非视距等因素的影响，测量到的RSSI值存在较大波动性，导致偏离真实值。因此，在代入公式计算前可以对数据进行滤波处理以提高RSSI测距精度。
本申请实施例中，针对测量到的RSSI值的波动现象，第二电子设备可以采用均值滤波、高斯滤波或者中值滤波与高斯滤波混合的数据处理方法处理测量到的RSSI值，从而得到稳定、平滑的目标RSSI。本申请实施例对确定目标RSSI的滤波方法不作限定。
步骤S605：第二电子设备将目标RSSI输入蓝牙测距模型，得到第一距离，其中，蓝牙测距模型是基于不同空间位置的权重得到的。
其中，不同空间位置的权重包括至少两个空间位置的权重。
请参见图7，图7是本申请实施例提供的一种确定蓝牙测距模型的方法流程图。以下以测距设备为例进行说明，该测距设备可以为第一电子设备或第二电子设备。
S701：确定初始蓝牙测距模型，该初始蓝牙测距模型用于指示距离与RSSI的对应关系。
在一些实施例中，由于BLE的载波频率一般在2400～2483.5MHz，因此可以取载波频率为2450MHz以确定初始蓝牙测距模型。具体的，可以基于弗里斯传输方程和自由路径损耗分析理论，在载波频率为 2450MHz，得到以下初始蓝牙测距模型：
其中，d为两个设备之间的距离，Advpower为发射功率，Lin为室内路径损耗(为常数)，RSSI为在设备距离为d时蓝牙信号的强度指示。
需要说明的是，在其他场景中，蓝牙测距模型也可以为其它公式，此处不作限定。
S702：确定测距设备同一距离的不同空间位置的权重，得到多个空间位置的权重，其中，每一个空间位置与测距设备的距离均为拟合距离。
其中，每一个空间位置与测距设备的距离相同，此处对拟合距离的取值不做限定。
请参见图8，图8是本申请实施例提供的一种不同空间位置的示意图。图8示例性示出了水平面上的11个空间位置，该水平面可以为水平于地面的平面，例如将测距设备放置于桌面，在桌面以测距设备的几何中心为圆心，以d1为半径每隔30°确定一个空位位置，得到如图8所示的11个空间位置，可见，每一个空间位置与测距设备的距离相等，均为d1。
在一些实施例中，空间位置的权重可以是基于用户的习惯确定的。例如用户的使用数据。
在一种实现中，可以采集用户使用测距设备和协同设备时的用户数据，进而，基于该用户数据划分测距设备和协同设备之间的相对位置的空间权重。例如，可以基于用户使用测距设备时协同设备的惯用位置来确定空间位置的权重，假设用户在使用测距设备与协同设备协同时，协同设备通常位于测距设备的左右两侧，则可以将位于测距设备的左右两侧的空间位置的权重增加，减少其他空间位置的权重。可以理解的，本申请采用空间权重划分的方式，分析用户常用设备协同方位，对不同的设备空间状态进行权重划分并加以矫正，可以提高协同设备在用户常用方位时测量到的距离的准确度，使在用户常用方位有更好的体验。
请参见图9，图9是本申请实施例提供的一种空间位置的权重的示意图。其中，A用于代表测距设备，B用于代表协同设备；每一个B所处位置到A的距离相等，每一个B与A均位于同一水平面。如图9所示，假设基于用户的使用习惯，确定协同设备位于位置1和位置2的概率为14.54％，则可以确定位置1和位置2的权重为14.54％；B所在其他位置的权重确定方法与确定位置1的权重相同，不再赘述。需要说明的是，图9所示的100、150、200、300以及400仅用于体现不同的空间权重的比例关系。
其中，空间位置是指两个设备之间的相对位置，例如，响应设备相对于请求设备的空间位置为第一空间位置即是，响应设备位于请求设备的左边。
本申请实施例中，由于拟合蓝牙测距模型时空间位置的权重不同，该蓝牙测距模型对于不同空间位置的距离精度不同，因此，在权重高的空间位置的测距能力更高。
S703：测距设备广播蓝牙信号。
在一些实施例中，测距设备可以响应于用户操作，通过BLE广播预设的蓝牙信号。
S704：在上述多个空间位置分别检测蓝牙信号的RSSI，得到多个空间位置对应的RSSI。
在一些实施例中，可以将同一协同设备放置于上述多个空间位置的每一个位置，分别检测蓝牙信号的RSSI；从而得到每一个空间位置对应的RSSI。其中，每一个空间位置对应的RSSI可以是滤波处理得到的，此处对滤波方法不做限定。
S705：基于多个空间位置的权重和多个空间位置对应的RSSI，确定拟合RSSI。
在一些实施例中，可以将每一个空间位置对应的RSSI分别乘以每一个空间位置对应的权重，得到多个处理后的RSSI；进而，再将多个处理后的RSSI进行均值处理，得到拟合RSSI。
其中，多个空间位置的权重可以为是百分比的格式。例如，多个空间位置分别为第一位置、第二位置、第三位置和第四位置；第一位置的权重为25％，第二位置的权重为25％，第三位置的权重为10％，第四位置的权重为40％；第一位置测得的RSSI为a，第二位置测得到RSSI为b，第三位置测得到RSSI为c，第四位置测得到RSSI为d，则拟合RSSI＝25％a+25％b+10％b+40％d。需要说明的是，多个空间位置的权重也可以为是数据或比例的格式，此处不作限定。
本申请实施例中，通过上述蓝牙测距模型确定设备之间的距离，该蓝牙测距模型是基于不同空间位置的权重得到的，因此，可以提高特定空间位置的距离测量精度，提高用户体验；本申请实施例可以适用于可移动的终端设备，可以提高可移动设备协同的过程中的测距精度。
另外，由于低功耗蓝牙广泛存在于各类终端设置之中，大多数场景下若需要设备间协同均需使用到 低功耗蓝牙的通讯功能，本申请实施例通过对蓝牙模块的一些固有参数分析，可以推算出设备间的大致距离，不需要附加其他测距设备，可以降低因测距所带来的附加功耗。
S706：基于拟合RSSI和拟合距离，对初始蓝牙测距模型进行拟合，得到上述蓝牙测距模型。
在一种实现中，可以将拟合RSSI和拟合距离输入上述公式(1)，将Advpower作为未知量，计算Advpower；将计算得到的Advpower代入上述公式(1)，得到蓝牙测距模型。
步骤S606：第二电子设备基于多个测距指令的RSSI，确定第二电子设备在第一电子设备的蓝牙天线的增益方向情况。
在一些实施例中，第二电子设备基于多个测距指令的RSSI，计算RSSI的变化率；基于RSSI的变化率确定第二电子设备在第一电子设备的蓝牙天线的增益方向情况。
在一种实现中，第二电子设备可以将多个测距指令的RSSI两两取差值，进而，分别将每两个测距指令的差值处于该两个测距指令的时间差，得到N个数值；将N个数值分别除以N，得到变化率，其中，N为正整数。
以下以三个测距指令为例进行说明，例如三个测距指令分别为第一指令、第二指令和第三指令；第一指令的RSSI为a，第二指令的RSSI为b，第三指令的RSSI为c，接收到第一指令的时间为ta，接收到第二指令的时间为tb，接收到第三指令的时间tc；则变化率m可以通过以下公式(2)计算得到。
需要说明的是，此处还可以通过其他方式计算变化率，此处对计算变化率的方式不作限定。
步骤S607：第二电子设备在确定第二电子设备在第一电子设备的蓝牙天线的最大增益方向时，将第一距离乘以预设倍数，得到第二距离。
在一些实施例中，第二电子设备在确定变化率大于预设阈值时(在最大增益方向)，将第一距离乘以预设倍数，得到第二距离。
其中，预设阈值和预设倍数可以基于实际情况确定，例如预设倍数可以为1.2或1.4，此处不作限定。本申请实施例考虑到响应设备位于请求设备的蓝牙天线的最大增益方向时RSSI较强，因此得到的距离往往偏小，因此，本申请实施例将得到距离乘以大于1的矫正系数，可以得到更加准确的距离。
在另一些实施例中，第二电子设备在确定变化率不大于预设阈值时(不在最大增益方向)，将第一距离乘以预设的矫正系数，得到第二距离，其中，该矫正系数可以为小于1的数值。
步骤S608：第二电子设备向第一电子设备发送响应消息，该响应消息包括第二距离。
在一种实现中，第二电子设备在得到第二距离后，可以向第一电子设备发送响应消息，该响应消息包括第二距离。
在另一种实现中，第二电子设备在执行步骤S606时，确定第二电子设备不位于第一电子设备的蓝牙天线的最大增益方向，则第二电子设备可以向第一电子设备发送响应消息，该响应消息包括第一距离。
在一些实施例中，第二电子设备可以在得到第二距离后，可以基于第二距离判断第一电子设备的协同状态，例如，在第二距离大于预设距离时认为该第一电子设备的协同状态不佳，进而，第二电子设备可以通过显示屏或语音播报等形式提示用户。
在另一些实施例中，第一电子设备可以在得到第二距离后，可以基于第二距离判断第二电子设备的协同状态，例如，在第二距离大于预设距离时认为该第二电子设备的协同状态不佳，进而，第一电子设备可以通过显示屏或语音播报等形式提示用户。例如，第一电子设备的蓝牙应用中，可以显示连接设备，还可以显示该设备的距离信息。
在本申请实施例中，也可以由第一电子设备执行距离测量的操作。
例如，第一电子设备第二电子设备发送请求消息，该请求消息用于请求第二电子设备接收到第一电子设备的蓝牙信号的RSSI；进而，第二电子设备在得到该RSSI后，可以将该RSSI发送至第一电子设备，由第一电子设备执行上述步骤S604至步骤S607以确定第一距离或第二距离。
请参见图10，图10是本申请实施例提供的又一种蓝牙测距方法的示意图。
S801：第一电子设备和第二电子设备建立蓝牙通信连接。
步骤S803的具体实现可以参见步骤S601的内容，此处不再赘述。
S802：第一电子设备向第二电子设备发送参数请求，参数请求用于请求第一电子设备的参数请求的接收信号强度指示RSSI。
在一种实现中，第一电子设备广播参数请求，该参数请求用于请求第一电子设备广播的蓝牙信号的RSSI。
在另一些实施例中，第一电子设备和第二电子设备处于多设备协同的场景中，例如，第一电子设备除了与第二电子设备建立蓝牙通信连接后，还跟其他多个设备建立了蓝牙通信连接，则第一电子设备广播上述参数请求后，其他多个设备在接收到该参数请求后，也可以测量参数请求的RSSI，向第一电子设备发送测量到的RSSI以使第一电子设备可以得到与各个设备的距离信息。例如，其他多个设备也可以执行以下步骤S803至步骤S805。
S803：第二电子设备在接收到上述参数请求后，获取多个参数请求的接收信号强度指示RSSI。
步骤S803的具体实现可以参见步骤S603的内容，此处不再赘述。
S804：第二电子设备基于多个参数请求的RSSI，确定目标RSSI。
步骤S804的具体实现可以参见步骤S604的内容，此处不再赘述。
S805：第二电子设备向第一电子设备发送响应消息，该响应消息包括目标RSSI。
S806：第一电子设备将目标RSSI输入蓝牙测距模型，得到第一距离，其中，蓝牙测距模型是基于不同空间位置的权重得到的。
步骤S808的具体实现可以参见步骤S605的内容，此处不再赘述。
S807：第一电子设备基于多个测距指令的RSSI，确定第二电子设备在第一电子设备的蓝牙天线的增益方向情况。
步骤S807的具体实现可以参见步骤S606的内容，此处不再赘述。
在一些实施例中，第一电子设备在确定第二电子设备在第一电子设备的蓝牙天线的最大增益方向时，可以执行步骤S808。
在另一些实施例中，第一电子设备在确定第二电子设备不在第一电子设备的蓝牙天线的最大增益方向时，可以不对第一距离进行处理，直接将第一距离作为第一电子设备和第二电子设备之间的距离；或者，第一电子设备也可以将第一距离乘以校正系数，得到第二距离，该矫正系数可以为小于1的数值。
S808：第一电子设备在确定第二电子设备在第一电子设备的蓝牙天线的最大增益方向时，将第一距离乘以预设倍数，得到第二距离。
步骤S808的具体实现可以参见步骤S607的内容，此处不再赘述。
在一些实施例中，第一电子设备在得到第二距离后，可以将第二距离发送至第二电子设备。
请参见图11，图11是本申请实施例提供的再一种蓝牙测距方法的示意图。该方法可以由上述电子设备100或电子设备200执行，也可以或上述图1或图2中的任意设备执行。
S1：接收指示开始测距的用户操作，测量主设备发送的蓝牙信号的RSSI。
在一些实施例中，协同设备接收指示开始测距的用户操作，测量主设备发送的蓝牙信号的RSSI。其中，协同设备可以为图6中的第二电子设备，主设备可以为图6中的第一电子设备，步骤S1的详细内容可以参见上文中图6的相关描述，此处不再赘述。
S2：对测量到的RSSI数值进行滤波处理。
此处对滤波方法不作限定，可参见上文中步骤S604的相关描述。
S3：将滤波后的RSSI输入蓝牙测距模型，得到目标距离；其中，蓝牙测距模型是通过常用协同方位矫正得到的。
其中，蓝牙测距模型的矫正过程可以参见图7中的相关描述。
S4：判断协同设备是否位于主设备的蓝牙增益方向，在协同设备位于主设备的蓝牙增益方向时，执行步骤S5；在协同设备不位于主设备的蓝牙增益方向，执行步骤S6。
在一些实施例中，协同设备位于主设备的蓝牙增益方向，也即是，协同设备位于主设备的蓝牙天线的最大增益方向。此处对判断协同设备是否位于主设备的蓝牙增益方向的过程可以参见步骤S606的相关 描述。
S5：对目标距离进行增益方向矫正。
在一种实现中，可以对目标距离乘以预设倍数，该预设倍数可以为大于1的数值。
此处对目标距离进行增益方向矫正的方法可参见上文中步骤S607的相关描述。
S6：对目标距离进行非增益方向矫正。
在一种实现中，可以不对目标距离进行非增益方向矫正，将目标距离作为矫正后的距离；进而，执行S7，输出矫正后的距离。
在另一种实现中，可以对目标进行非增益方向矫正，例如乘以矫正系数，该矫正系数小于1，得到矫正后的距离。
S7：输出矫正后的距离。
在执行上述步骤S5或步骤S6后，可以得到矫正后的距离。
本申请实施例还提供了一种电子设备，电子设备包括一个或多个处理器和一个或多个存储器；其中，一个或多个存储器与一个或多个处理器耦合，一个或多个存储器用于存储计算机程序代码，计算机程序代码包括计算机指令，当一个或多个处理器执行计算机指令时，使得电子设备执行上述实施例描述的方法。
本申请实施例还提供了一种包含指令的计算机程序产品，当计算机程序产品在电子设备上运行时，使得电子设备执行上述实施例描述的方法。
本申请实施例还提供了一种计算机可读存储介质，包括指令，当指令在电子设备上运行时，使得电子设备执行上述实施例描述的方法。
可以理解的是，本申请的各实施方式可以任意进行组合，以实现不同的技术效果。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk)等。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，该流程可以由计算机程序来指令相关的硬件完成，该程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。而前述的存储介质包括：ROM或随机存储记忆体RAM、磁碟或者光盘等各种可存储程序代码的介质。
总之，以上所述仅为本申请技术方案的实施例而已，并非用于限定本申请的保护范围。凡根据本申请的揭露，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (19)

  1. 一种蓝牙测距方法，其特征在于，所述方法包括：
    响应设备与请求设备建立蓝牙通信连接；
    所述响应设备在接收到所述请求设备发送的测距请求后，测量所述测距请求的信号强度，得到第一接收信号强度指示RSSI；
    所述响应设备基于所述第一RSSI和蓝牙测距模型，得到第一距离；所述蓝牙测距模型是基于距所述请求设备的预设距离和所述预设距离下修正后的RSSI的对应关系拟合得到的，所述修正后的RSSI为所述请求设备广播蓝牙信号时在距所述请求设备同一距离的多个空间位置测到的多个RSSI和所述多个空间位置对应的权重处理得到的；
    所述响应设备将所述第一距离发送至所述请求设备。
  2. 根据权利要求1所述的方法，其特征在于，所述修正后的RSSI为所述多个RSSI分别乘以所述多个空间位置对应的权重后相加得到的。
  3. 根据权利要求1或2所述的方法，其特征在于，所述响应设备与所述请求设备距离相同且位置不同时，所述第一距离的大小不同。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述响应设备相对于所述请求设备的空间位置为第一空间位置时，所述第一距离为d1，所述第一空间位置的权重为第一权重的；所述响应设备相对于所述请求设备的空间位置为第二空间位置时，所述第一距离为d2，所述第二空间位置的权重为第二权重；所述第一权重高于所述第二权重；
    所述第一空间位置和所述第二空间位置距所述请求设备的距离均为d时，所述d1与所述d的差值小于所述d2与所述d的差值；所述d1、所述d2和所述d均为正数。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述空间位置的权重是基于用户使用所述请求设备与其他设备进行蓝牙通信时其他设备的位置数据得到的。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，所述响应设备基于所述第一RSSI和蓝牙测距模型，得到第一距离，包括：
    所述响应设备将所述第一RSSI输入所述蓝牙测距模型，得到第二距离；
    所述响应设备在确定所述响应设备位于所述请求设备的蓝牙天线的预设增益方向时，对所述第二距离进行处理，得到所述第一距离。
  7. 根据权利要求6所述的方法，其特征在于，所述响应设备在确定所述响应设备位于所述请求设备的蓝牙天线的预设增益方向时，对所述第二距离进行处理，包括：
    所述响应设备在确定所述响应设备位于所述请求设备的蓝牙天线的最大增益方向时，将所述第二距离乘以预设倍数，得到所述第一距离。
  8. 根据权利要求7所述的方法，其特征在于，所述第一RSSI包括至少两个RSSI参数，所述方法还包括：
    所述响应设备计算所述至少两个RSSI参数的变化率；
    所述响应设备在所述至少两个RSSI参数的变化率超过预设阈值时，确定所述响应设备位于所述请求设备的蓝牙天线的最大增益方向。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述响应设备在接收到所述请求设备发送的测距请求后，测量所述测距请求的信号强度，得到第一信号强度测量值RSSI，包括：
    所述响应设备在接收到所述请求设备发送的测距请求后，测量所述测距请求的信号强度，得到第二 RSSI；
    所述响应设备对所述第二RSSI进行滤波，得到所述第一RSSI。
  10. 一种蓝牙测距方法，其特征在于，所述方法包括：
    请求设备与响应设备建立蓝牙通信连接；
    所述请求设备向所述响应设备发送参数请求；所述参数请求用于请求测量所述参数请求的信号强度以得到第一接收信号强度指示RSSI；
    所述请求设备接收所述响应设备发送的所述第一RSSI；
    所述请求设备基于所述第一RSSI和蓝牙测距模型，得到第一距离；所述蓝牙测距模型是基于距所述请求设备的预设距离和所述预设距离下修正后的RSSI的对应关系拟合得到的，所述修正后的RSSI为所述请求设备广播蓝牙信号时在距所述请求设备同一距离的多个空间位置测到的多个RSSI和所述多个空间位置对应的权重处理得到的。
  11. 根据权利要求10所述的方法，其特征在于，所述修正后的RSSI为所述多个RSSI分别乘以所述多个空间位置对应的权重后相加得到的。
  12. 根据权利要求10或11所述的方法，其特征在于，所述响应设备与所述请求设备距离相同且位置不同时，所述第一距离的大小不同。
  13. 根据权利要求10至12任一项所述的方法，其特征在于，所述空间位置的权重是基于用户使用所述请求设备与其他设备进行蓝牙通信时其他设备的位置数据得到的。
  14. 根据权利要求10至13任一项所述的方法，其特征在于，所述请求设备基于所述第一RSSI和蓝牙测距模型，得到第一距离，包括：
    所述请求设备将所述第一RSSI输入所述蓝牙测距模型，得到第二距离；
    所述请求设备在确定所述响应设备位于所述请求设备的蓝牙天线的预设增益方向时，对所述第二距离进行处理，得到所述第一距离。
  15. 根据权利要求14所述的方法，其特征在于，所述请求设备在确定所述响应设备位于所述请求设备的蓝牙天线的预设增益方向时，对所述第二距离进行处理，包括：
    所述请求设备在确定所述响应设备位于所述请求设备的蓝牙天线的最大增益方向时，将所述第二距离乘以预设倍数，得到所述第一距离。
  16. 根据权利要求15所述的方法，其特征在于，所述第一RSSI包括至少两个RSSI参数，所述方法还包括：
    所述请求设备计算所述至少两个RSSI参数的变化率；
    所述请求设备在所述至少两个RSSI参数的变化率超过预设阈值时，确定所述响应设备位于所述请求设备的蓝牙天线的最大增益方向。
  17. 一种电子设备，其特征在于，所述电子设备包括一个或多个处理器和一个或多个存储器；其中，所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使得所述电子设备执行如权利要求1-9或10-16中任一项所述的方法。
  18. 一种计算机可读存储介质，包括指令，其特征在于，当所述指令在电子设备上运行时，使得所述电子设备执行如权利要求1-9或10-16中任一项所述的方法。
  19. 一种蓝牙测距系统，其特征在于，所述蓝牙测距系统包括权利要求17所述的电子设备。
PCT/CN2023/126062 2022-10-25 2023-10-24 一种蓝牙测距方法、电子设备及系统 WO2024088225A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016138800A1 (en) * 2015-03-03 2016-09-09 The Hong Kong University Of Science And Technology Optimizing position estimates of a device for indoor localization
CN111194000A (zh) * 2020-01-07 2020-05-22 东南大学 基于蓝牙融合混合滤波与神经网络的测距方法与系统
CN114363808A (zh) * 2022-01-07 2022-04-15 山东科技大学 一种基于rssi测距的室内定位方法
CN114727384A (zh) * 2022-03-30 2022-07-08 河南省联睿智能科技研究院有限公司 一种基于加权min-max的蓝牙RSSI定位方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016138800A1 (en) * 2015-03-03 2016-09-09 The Hong Kong University Of Science And Technology Optimizing position estimates of a device for indoor localization
CN111194000A (zh) * 2020-01-07 2020-05-22 东南大学 基于蓝牙融合混合滤波与神经网络的测距方法与系统
CN114363808A (zh) * 2022-01-07 2022-04-15 山东科技大学 一种基于rssi测距的室内定位方法
CN114727384A (zh) * 2022-03-30 2022-07-08 河南省联睿智能科技研究院有限公司 一种基于加权min-max的蓝牙RSSI定位方法

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