Bluetooth control circuit, signal sending method and terminal

Abstract

The invention relates to a Bluetooth control circuit, a signal sending method and a terminal, and the Bluetooth control circuit comprises a Bluetooth chip which is used for broadcasting a Bluetooth signal after a first terminal is powered off under the condition that the first terminal starts a Bluetooth searching function; and the power management chip is connected to the Bluetooth chip and is used for supplying power to the Bluetooth chip after the first terminal is shut down. According to the method and the device, the Bluetooth chip can still be powered after the first terminal is powered off, so that the Bluetooth chip can smoothly broadcast the Bluetooth signal after the first terminal is powered off, so that the second terminal except the first terminal can receive the Bluetooth signal and obtain the position information of the first terminal based on the Bluetooth signal; the first terminal can be found after the first terminal is shut down.

Description

Bluetooth control circuit, signal transmission method and terminal Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to Bluetooth control circuits, signal transmission methods, signal transmission devices, terminals, and computer-readable storage media. Background Technology

[0002] In scenarios where users use a terminal, there are situations that may cause them to lose their terminal after it has been turned off. For example, the terminal might be forgotten somewhere, or it might have run out of battery and shut down, or it might have been actively turned off, such as being lost, stolen, or turned off by someone else. Since a terminal that has been turned off will not respond to calls from other terminals, it is difficult for users to retrieve their terminal using other devices. Summary of the Invention

[0003] This disclosure provides a Bluetooth control circuit, a signal transmission method, and a terminal to address the shortcomings of related technologies.

[0004] According to a first aspect of the present disclosure, a Bluetooth control circuit is provided, disposed in a first terminal. The Bluetooth control circuit includes: a Bluetooth chip, configured to broadcast a Bluetooth signal after the first terminal is powered off when the Bluetooth search function of the first terminal is enabled; and a power management chip, connected to the Bluetooth chip, configured to supply power to the Bluetooth chip after the first terminal is powered off.

[0005] According to a second aspect of the present disclosure, a signal transmission method is proposed, executed by a first terminal, the method comprising: determining that the Bluetooth search function is enabled; broadcasting a Bluetooth signal after the first terminal is powered off, wherein the Bluetooth chip broadcasting the Bluetooth signal is powered by a power management chip after the first terminal is powered off.

[0006] According to a third aspect of the present disclosure, a terminal is provided, including the Bluetooth control circuit described in the first aspect.

[0007] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided that stores a computer program thereon, which, when executed by a processor, implements the steps of the method described in the second aspect.

[0008] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0009] According to the embodiments of this disclosure, it can be ensured that the Bluetooth chip can still be powered on after the first terminal is powered off, so that the Bluetooth chip can successfully broadcast the Bluetooth signal after the first terminal is powered off, so that a second terminal other than the first terminal can receive the Bluetooth signal and obtain the location information of the first terminal based on the Bluetooth signal, thereby locating the first terminal after the first terminal is powered off.

[0010] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 is a schematic diagram of a Bluetooth control circuit according to an embodiment of the present disclosure.

[0013] Figure 2 is a schematic diagram of another Bluetooth control circuit according to an embodiment of the present disclosure.

[0014] Figure 3 is a schematic flowchart illustrating a signal transmission method according to an embodiment of the present disclosure.

[0015] Figure 4 is a schematic flowchart illustrating a signal transmission method according to an embodiment of the present disclosure.

[0016] Figure 5 is a schematic block diagram of a signal transmitting device according to an embodiment of the present disclosure.

[0017] Figure 6 is a schematic block diagram of an apparatus for signal transmission according to an embodiment of the present disclosure. Detailed Implementation

[0018] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0019] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0020] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0021] For the sake of brevity and ease of understanding, this document uses the terms "greater than" or "less than", "higher than" or "lower than" to describe size relationships. However, it will be understood by those skilled in the art that the term "greater than" also includes the meaning of "greater than or equal to", and "less than" also includes the meaning of "less than or equal to"; the term "higher than" also includes the meaning of "higher than or equal to", and "lower than" also includes the meaning of "lower than or equal to".

[0022] Figure 1 is a schematic diagram of a Bluetooth control circuit according to an embodiment of the present disclosure.

[0023] In some embodiments, the Bluetooth control circuit may be located in the first terminal. It should be noted that the first terminal described in the embodiments of this disclosure, and the terminals in subsequent embodiments, include, but are not limited to, electronic devices such as mobile phones, tablets, personal computers, wearable devices, sensors, and IoT devices.

[0024] As shown in Figure 1, the Bluetooth control circuit may include: Bluetooth chip 101 and power management chip 102.

[0025] In some embodiments, when the Bluetooth chip enables the Bluetooth search function on the first terminal, it can broadcast a Bluetooth signal after the first terminal is powered off.

[0026] In some embodiments, the power management IC, connected to the Bluetooth chip, can supply power to the Bluetooth chip after the first terminal is powered off.

[0027] In some embodiments, the Bluetooth chip sends a first signal to the power management chip before the first terminal is powered off, wherein the first signal is used to instruct the power management chip to supply power to the Bluetooth chip after the first terminal is powered off.

[0028] In some embodiments, the power management chip receives a first signal before the first terminal is powered off, and determines, based on the first signal, to supply power to the Bluetooth chip after the first terminal is powered off.

[0029] In some embodiments, when the first terminal has enabled the Bluetooth search function, it can send an indication message to the Bluetooth chip to notify the Bluetooth chip that the terminal has enabled the Bluetooth search function.

[0030] In this scenario, the Bluetooth chip can send a first signal to the power management chip before the first terminal is powered off. For example, the Bluetooth chip can send the first signal to the power management chip even if the first terminal has received a power-off signal but has not yet powered off, or it can send the first signal to the power management chip before the first terminal has received a power-off signal. This disclosure does not limit the specific implementation of the Bluetooth chip sending the first signal to the power management chip before the first terminal is powered off.

[0031] As shown in Figure 1, there may be at least one connection between the power management chip and the Bluetooth chip. For example, the connection used to send the CLK_EN (e.g., clock enable) signal can be used by the Bluetooth chip to send a first signal to the power management chip. For example, the first signal may include a high-level CLK_EN signal.

[0032] After receiving the first signal, the power management chip can determine that it needs to supply power to the Bluetooth chip after the first terminal is powered off. Therefore, after the first terminal is powered off, it can supply power to the Bluetooth chip, for example, through battery voltage (VBAT).

[0033] For example, as shown in Figure 1, the power management chip can supply power to the Bluetooth chip through at least one connection. For instance, one connection can send a BT_EN (Bluetooth enable) signal to the Bluetooth chip; another connection can supply power to the Bluetooth chip through a 1.8V I / O (Input / Output) interface; and yet another connection can supply power to the Bluetooth chip through a 1.2V I / O interface. This disclosure does not limit the method by which the power management chip supplies power to the Bluetooth chip.

[0034] According to the embodiments of this disclosure, it can be ensured that the Bluetooth chip can still be powered on after the first terminal is powered off, so that the Bluetooth chip can successfully broadcast the Bluetooth signal after the first terminal is powered off, so that a second terminal other than the first terminal can receive the Bluetooth signal and obtain the location information of the first terminal based on the Bluetooth signal, thereby locating the first terminal after the first terminal is powered off.

[0035] In some embodiments, in order to ensure power supply to the Bluetooth chip, the power management chip can control the battery of the first terminal to shut down when the battery is about to run out, thereby ensuring that the first terminal still has a certain amount of power when it is turned off, so as to enable it to supply power to the Bluetooth chip.

[0036] In some embodiments, as shown in FIG1, the Bluetooth control circuit further includes:

[0037] Clock chip 103, connected to the Bluetooth chip, sends a clock signal to the Bluetooth chip after the first terminal is powered off. For example, the clock chip can be a power management kit (PMK) that can receive the power on / off (PHONE_ON_N) signal from the first terminal.

[0038] As shown in Figure 1, multiple connections can exist between the clock chip and the Bluetooth chip, allowing the transmission of multiple clock signals. These clock signals include, but are not limited to, the system clock (System CLK) signal and the sleep clock (Sleep CLK) signal. The Bluetooth signal can operate based on the clock signal, such as broadcasting the Bluetooth signal or entering sleep mode after broadcasting the Bluetooth signal.

[0039] It should be noted that the structure shown in Figure 1 is only an example of implementing the technical solution of this disclosure. The components included in the Bluetooth control circuit of this disclosure and the connection relationship between the components are not limited to those shown in Figure 1. For example, the power management chip can also be connected to the clock chip to supply power to the clock chip after the first terminal is turned off, for example, by supplying power through the battery voltage (VBAT) so that the clock chip can emit a clock signal.

[0040] Figure 2 is a schematic diagram of another Bluetooth control circuit according to an embodiment of the present disclosure.

[0041] As shown in Figure 2, the Bluetooth control circuit also includes:

[0042] Processor 104, connected to the Bluetooth chip, ceases communication with the Bluetooth chip after the first terminal is powered off. For example, the processor may include a host application processor.

[0043] In some embodiments, since Bluetooth chips in conventional technologies communicate with processors when they are working, the processors can control the operation of the Bluetooth chips and obtain relevant information received by the Bluetooth chips.

[0044] However, in this disclosure, after the first terminal is powered off, the Bluetooth chip broadcasts Bluetooth signals based on predefined rules (e.g., predefined periods), and the Bluetooth chip does not receive Bluetooth signals from other devices, so there is no need to communicate with the processor. Therefore, the processor can be set to stop communicating with the Bluetooth chip after the first terminal is powered off, thereby reducing the power consumption of the first terminal and improving the battery life of the Bluetooth chip broadcasting Bluetooth signals, so that the Bluetooth signal can be received by the second terminal and the probability of the first terminal being found can be increased.

[0045] In some embodiments, as shown in FIG2, there may be multiple connections between the processor and the Bluetooth chip. For example, one connection may be used for host interfaces, and two connections may be used for PCIe (Peripheral Component Interconnect Express) interfaces.

[0046] It should be noted that the connection between the processor and the Bluetooth chip is not limited to the situation shown in Figure 2. Other connections may exist for other interfaces, and this disclosure does not limit this.

[0047] For the power supply related to the interface between the processor and the Bluetooth chip, even if the Bluetooth chip broadcasts a Bluetooth signal after the first terminal is powered off, it needs to maintain the power supply as it would under traditional power-off conditions. For example, taking the PCIe interface as an example, there are pull-up resistors on the two corresponding connections, such as R8 and R10, each with a resistance value of 10k ohms. The pull-up voltage of these two pull-up resistors needs to remain at the voltage of 0V when the power is off after the first terminal is powered off, i.e., Pwr0.

[0048] In some embodiments, the first terminal further includes a Wi-Fi chip, wherein the power supply circuit of the Wi-Fi chip is separate from the power supply circuit of the Bluetooth chip.

[0049] Since Wi-Fi chips and Bluetooth chips are generally part of the same chip (e.g., called a WCN chip), they are not identical. In this embodiment, the power supply circuits for the Wi-Fi chip and the Bluetooth chip can be separated. Therefore, when the power management chip supplies power to the Bluetooth chip, it does not supply power to the Wi-Fi chip. This prevents the Wi-Fi chip from consuming power, which improves the Bluetooth chip's ability to broadcast Bluetooth signals and increases the likelihood of the first terminal being found.

[0050] In some embodiments, the power of the Bluetooth signal broadcast by the Bluetooth chip is less than or equal to a first power threshold. For example, the first power threshold can be a power value such as 0 dBm, and the disclosure is not limited thereto.

[0051] By setting the power of the Bluetooth chip's broadcast Bluetooth signal to be less than or equal to a first power threshold, it is beneficial to extend the battery life of the Bluetooth chip's broadcast Bluetooth signal, so that the Bluetooth signal can be received by the second terminal, thereby increasing the probability that the first terminal can be found.

[0052] It should be noted that since the purpose of the Bluetooth chip broadcasting the Bluetooth signal is for the second terminal to determine the location information of the first terminal based on the Bluetooth signal, it is necessary to ensure that a certain number of second terminals can receive the broadcast Bluetooth signal. Therefore, the power of the Bluetooth signal cannot be too low, for example, it can be greater than or equal to the second power threshold.

[0053] Taking a Bluetooth chip broadcasting a Bluetooth signal with a power of 0dBm as an example, under this condition, it can be guaranteed that the second terminal within a radius of 50 meters with the first terminal as the center can receive the Bluetooth signal. While saving power consumption, it can also ensure that a certain number of second terminals can receive the broadcast Bluetooth signal.

[0054] In some embodiments, the Bluetooth control circuit further includes: a radio frequency front-end module (FEM), one end of which is connected to the Bluetooth chip and the other end of which is connected to an antenna for broadcasting Bluetooth signals; wherein, when the Bluetooth chip broadcasts Bluetooth signals after the first terminal is powered off, the radio frequency front-end module is in bypass mode.

[0055] The radio frequency front-end module can perform some processing on the Bluetooth signal to be broadcast, such as power amplification. However, since the power of the Bluetooth signal in this disclosure is very small, for example, 0dBm, there is no need to perform power amplification. Therefore, the radio frequency front-end module can be set to be in bypass mode when the Bluetooth chip broadcasts the Bluetooth signal after the first terminal is powered off. In this mode, the radio frequency front-end module is equivalent to being short-circuited and will not generate power consumption. This is beneficial to the Bluetooth chip's ability to continue broadcasting the Bluetooth signal, so that the Bluetooth signal can be received by the second terminal and the probability of the first terminal being found can be increased.

[0056] In some embodiments, the Bluetooth control circuit further includes an antenna tuner connected to an antenna used for broadcasting Bluetooth signals; wherein the antenna tuner is powered off after the first terminal is powered off.

[0057] Antenna tuners can be used to achieve impedance matching so that the Bluetooth signal can have relatively high radiated power. However, in this disclosure, the power of the Bluetooth signal is relatively low, for example, 0 dBm, so an antenna tuner is not necessary during Bluetooth signal broadcasting.

[0058] For example, the first terminal may include multiple antennas, with one antenna corresponding to one chain, and one antenna tuner may be set on each chain. This disclosure allows the antenna tuner on each chain to be powered off after the first terminal is powered off, reducing current consumption by 50μA per chain. This improves the battery life of the Bluetooth chip broadcasting Bluetooth signals, ensuring the Bluetooth signal can be received by the second terminal and increasing the probability of the first terminal being found.

[0059] In some embodiments, the Bluetooth chip broadcasts Bluetooth signals for a period greater than or equal to a period threshold after the first terminal is powered off; wherein the Bluetooth chip is in a sleep state when not broadcasting Bluetooth signals. For example, the period threshold can be 2 seconds.

[0060] By setting the Bluetooth chip to broadcast Bluetooth signals over a relatively long period, it is beneficial to extend the battery life of the Bluetooth chip's broadcast Bluetooth signals, so that the Bluetooth signals can be received by the second terminal, thereby increasing the probability that the first terminal can be found.

[0061] Based on the above embodiments, it can be ensured that the current consumption of the Bluetooth chip broadcasting Bluetooth signals is about 1mA, which is much higher than the 2.5mA in the traditional technology. This can greatly improve the battery life of the Bluetooth chip broadcasting Bluetooth signals, for example, it can meet the Bluetooth broadcasting requirements of 24 to 48 hours.

[0062] Figure 3 is a schematic flowchart illustrating a signal transmission method according to an embodiment of the present disclosure. The scheme shown in the embodiment of the present disclosure can be executed by a first terminal, for example, by a Bluetooth signal, or by a Bluetooth chip and other hardware (e.g., an antenna) of the first terminal for cooperating with the Bluetooth chip.

[0063] As shown in Figure 3, the signal transmission method may include the following steps:

[0064] In step S301, it is confirmed that the Bluetooth search function is enabled;

[0065] In step S302, a Bluetooth signal is broadcast after the first terminal is powered off, wherein the Bluetooth chip broadcasting the Bluetooth signal is powered by the power management chip after the first terminal is powered off.

[0066] In some embodiments, the signal transmission method further includes: sending a first signal to the power management chip, wherein the first signal is used to instruct the power management chip to supply power to the Bluetooth chip after the first terminal is powered off.

[0067] In some embodiments, the signal transmission method further includes: receiving a broadcast configuration sent by a cloud service; wherein broadcasting a Bluetooth signal after the first terminal is powered off includes: broadcasting a Bluetooth signal according to the broadcast configuration after the first terminal is powered off.

[0068] In some embodiments, the signal transmission method further includes: receiving a first key sent by a cloud server; wherein the Bluetooth signal broadcast after the first terminal is powered off contains the first key, the Bluetooth signal is used by the second terminal to determine the location information of the first terminal, and the first key is used by the second terminal to encrypt the location information of the first terminal.

[0069] For example, the first terminal can determine whether the Bluetooth search function is enabled. If the Bluetooth search function is enabled, the Bluetooth chip can be controlled to broadcast the Bluetooth signal after the first terminal is powered off.

[0070] The second terminal can receive the Bluetooth signal broadcast by the first terminal and determine the location information of the first terminal based on the Bluetooth signal. The location information may include the location of the first terminal, or process information used to determine the location of the first terminal (such as angle, distance, etc.).

[0071] The second terminal can then send its location information to the cloud server. When the location information is process information used to determine the location of the first terminal, the cloud server can determine the location of the first terminal based on the process information (e.g., process information sent by one or more second terminals).

[0072] Furthermore, the cloud server can send the location of the first terminal to the third terminal. The first terminal and the third terminal can be terminals owned by the user. The user can view the location of the first terminal on the third terminal, thereby determining the location of the first terminal, and then finding the first terminal based on the location of the first terminal.

[0073] Figure 4 is a schematic flowchart illustrating a signal transmission method according to an embodiment of the present disclosure.

[0074] As shown in Figure 4, Bluetooth finding can be achieved based on cloud services (e.g., provided by a cloud server).

[0075] For example, the first and second terminals have a search application and a Bluetooth application installed, while the third terminal has a search application and a display application installed.

[0076] The first terminal and the third terminal are user-owned terminals. The user can enable the Bluetooth search function on the first terminal. The search application on the first terminal can receive Bluetooth search configurations provided by the cloud service, such as the Bluetooth signal broadcast period and broadcast power. The cloud service can also provide the first key.

[0077] Furthermore, the Bluetooth application can configure the parameters of the Bluetooth control circuit of the first terminal based on the Bluetooth lookup configuration. After the first terminal is powered off, the Bluetooth control circuit can broadcast a Bluetooth signal based on the Bluetooth lookup configuration, and the Bluetooth signal broadcast by the Bluetooth chip can carry the first key.

[0078] At least one second terminal can receive the Bluetooth signal broadcast by the first terminal via a Bluetooth chip, and then send (e.g., pass-through) the relevant data of the Bluetooth signal to a Bluetooth application. The Bluetooth application can determine the location information of the first terminal based on the Bluetooth signal and pass-through the location information to a search application. The search application can encrypt the location information using a first key and report the encrypted location information to a cloud service. This helps prevent unauthorized devices without the first key from obtaining the location information of the first terminal.

[0079] The cloud service can determine the location of the first terminal based on location information and send the location, encrypted with a first key, to a search application on the third terminal. The third terminal can pre-authenticate with the cloud service; upon successful authentication, it can obtain the first key. Subsequently, upon receiving the encrypted location, it can decrypt it using the first key. This helps prevent unauthorized devices without the first key from obtaining the first terminal's location information. The third terminal can then display the first terminal's location through a display application, allowing users to view the first terminal's location on their own devices, thus enabling Bluetooth-based location tracking of the first terminal.

[0080] Corresponding to the aforementioned embodiments of the signal transmission method, this disclosure also provides embodiments of the signal transmission apparatus.

[0081] Figure 5 is a schematic block diagram of a signal transmitting device according to an embodiment of the present disclosure. The signal transmitting device shown in this embodiment can be a terminal, or a device composed of modules in a terminal. The terminal includes, but is not limited to, communication devices such as mobile phones, tablets, wearable devices, sensors, and Internet of Things devices.

[0082] As shown in Figure 5, the signal transmitting device includes: a processing module 501, a transmitting module 502, and a receiving module 503.

[0083] In some embodiments, the processing module is configured to determine to enable the Bluetooth search function; the sending module is configured to broadcast a Bluetooth signal after the first terminal is powered off, wherein the Bluetooth chip broadcasting the Bluetooth signal is powered by a power management chip after the first terminal is powered off.

[0084] In some embodiments, the processing module is further configured to send a first signal to the power management chip, wherein the first signal is used to instruct the power management chip to supply power to the Bluetooth chip after the first terminal is powered off.

[0085] In some embodiments, the receiving module is configured to receive a broadcast configuration sent by a cloud service; the sending module is configured to broadcast a Bluetooth signal after the first terminal is powered off according to the broadcast configuration.

[0086] In some embodiments, the receiving module is further configured to receive a first key sent by a cloud server; wherein the Bluetooth signal broadcast after the first terminal is powered off includes the first key, the Bluetooth signal is used by the second terminal to determine the location information of the first terminal, and the first key is used by the second terminal to encrypt the location information of the first terminal.

[0087] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments of the relevant methods, and will not be elaborated upon here.

[0088] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this disclosure according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0089] Embodiments of this disclosure also provide an electronic device, including: a Bluetooth control circuit and a processor as described in any of the above embodiments; a memory for storing processor-executable instructions; wherein the processor is configured to implement the methods described in any of the above embodiments.

[0090] Embodiments of this disclosure also provide a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any of the above embodiments.

[0091] Figure 6 is a schematic block diagram illustrating a signal transmission device 600 according to an embodiment of the present disclosure. For example, device 600 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0092] Referring to FIG6, device 600 may include one or more of the following components: processing component 602, memory 604, power supply component 606, multimedia component 608, audio component 610, input / output (I / O) interface 612, sensor component 614, and communication component 616.

[0093] Processing component 602 typically controls the overall operation of device 600, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 602 may include one or more processors 620 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 602 may include one or more modules to facilitate interaction between processing component 602 and other components. For example, processing component 602 may include a multimedia module to facilitate interaction between multimedia component 608 and processing component 602.

[0094] Memory 604 is configured to store various types of data to support the operation of device 600. Examples of such data include instructions for any application or method operating on device 600, contact data, phonebook data, messages, pictures, videos, etc. Memory 604 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0095] Power supply component 606 provides power to various components of device 600. Power supply component 606 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to device 600.

[0096] Multimedia component 608 includes a screen that provides an output interface between the device 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 608 includes a front-facing camera and / or a rear-facing camera. When the device 600 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0097] Audio component 610 is configured to output and / or input audio signals. For example, audio component 610 includes a microphone (MIC) configured to receive external audio signals when device 600 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 604 or transmitted via communication component 616. In some embodiments, audio component 610 also includes a speaker for outputting audio signals.

[0098] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0099] Sensor assembly 614 includes one or more sensors for providing status assessments of various aspects of device 600. For example, sensor assembly 614 may detect the on / off state of device 600, the relative positioning of components such as the display and keypad of device 600, changes in the position of device 600 or a component of device 600, the presence or absence of user contact with device 600, the orientation or acceleration / deceleration of device 600, and temperature changes of device 600. Sensor assembly 614 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 614 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 614 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0100] Communication component 616 is configured to facilitate wired or wireless communication between device 600 and other devices. Device 600 can access wireless networks based on communication standards, such as WiFi, 2G or 3G, 4G LTE, 5G NR, or combinations thereof. In one exemplary embodiment, communication component 616 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 616 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0101] In an exemplary embodiment, device 600 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described in any of the above embodiments.

[0102] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 604 including instructions, which can be executed by a processor 620 of the device 600 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0103] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0104] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A Bluetooth control circuit, characterized in that, The Bluetooth control circuit, located in the first terminal, includes: a Bluetooth chip for broadcasting a Bluetooth signal after the first terminal is powered off when the Bluetooth search function is enabled on the first terminal; and a power management chip connected to the Bluetooth chip for supplying power to the Bluetooth chip after the first terminal is powered off.

2. The circuit according to claim 1, characterized in that, The Bluetooth control circuit further includes a clock chip connected to the Bluetooth chip, which sends a clock signal to the Bluetooth chip after the first terminal is powered off.

3. The circuit according to claim 1, characterized in that, The first terminal further includes a Wi-Fi chip, wherein the power supply circuit of the Wi-Fi chip is separate from the power supply circuit of the Bluetooth chip.

4. The circuit according to claim 1, characterized in that, The power of the Bluetooth signal broadcast by the Bluetooth chip is less than or equal to a first power threshold.

5. The circuit according to claim 4, characterized in that, The Bluetooth control circuit further includes: a radio frequency front-end module, one end of which is connected to the Bluetooth chip and the other end of which is connected to an antenna for broadcasting the Bluetooth signal; wherein, when the Bluetooth chip broadcasts the Bluetooth signal after the first terminal is powered off, the radio frequency front-end module is in bypass mode.

6. The circuit according to any one of claims 1 to 5, characterized in that, The Bluetooth chip is also used to send a first signal to the power management chip before the first terminal is powered off; wherein the first signal is used to instruct the power management chip to supply power to the Bluetooth chip after the first terminal is powered off.

7. The circuit according to any one of claims 1 to 5, characterized in that, The Bluetooth control circuit further includes a processor connected to the Bluetooth chip, which stops communicating with the Bluetooth chip after the first terminal is powered off.

8. The circuit according to any one of claims 1 to 5, characterized in that, The Bluetooth control circuit further includes an antenna tuner connected to an antenna used for broadcasting the Bluetooth signal; wherein the antenna tuner is powered off after the first terminal is turned off.

9. The circuit according to any one of claims 1 to 5, characterized in that, The Bluetooth chip broadcasts Bluetooth signals for a period greater than or equal to a period threshold after the first terminal is powered off; wherein the Bluetooth chip is in a sleep state when it is not broadcasting Bluetooth signals.

10. A signal transmission method, characterized in that, The method, executed by a first terminal, includes: determining that the Bluetooth search function is enabled; and broadcasting a Bluetooth signal after the first terminal is powered off, wherein the Bluetooth chip broadcasting the Bluetooth signal is powered by a power management chip after the first terminal is powered off.

11. The method according to claim 10, characterized in that, The method further includes sending a first signal to the power management chip, wherein the first signal is used to instruct the power management chip to supply power to the Bluetooth chip after the first terminal is turned off.

12. The method according to claim 10, characterized in that, The method further includes: receiving a broadcast configuration sent by a cloud server; wherein, broadcasting a Bluetooth signal after the first terminal is powered off includes: broadcasting a Bluetooth signal according to the broadcast configuration after the first terminal is powered off.

13. The method according to any one of claims 10 to 12, characterized in that, The method further includes: receiving a first key sent by a cloud server; wherein the Bluetooth signal broadcast after the first terminal is powered off contains the first key, the Bluetooth signal is used by the second terminal to determine the location information of the first terminal, and the first key is used by the second terminal to encrypt the location information of the first terminal.

14. An electronic device, characterized in that, The Bluetooth control circuit includes any one of claims 1 to 9.

15. The electronic device according to claim 14, characterized in that, The electronic device is configured to implement the method of any one of claims 10 to 13.

16. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method described in any one of claims 10 to 13.

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