WO2018145290A1

WO2018145290A1 - Terminal device, ble slave device, and searching method and system based on ble

Info

Publication number: WO2018145290A1
Application number: PCT/CN2017/073193
Authority: WO
Inventors: 陈法海; 赵所峰
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2017-02-09
Filing date: 2017-02-09
Publication date: 2018-08-16
Also published as: CN107079278A

Abstract

The present invention relates to the field of wireless communication, and discloses a terminal device, a BLE slave device, and a searching method and system based on BLE. In the present invention, the searching method based on BLE is used in the terminal device, and comprises: scanning for a Bluetooth Low Energy BLE slave device; and, after finding a target BLE slave device, sending a request data packet to the target BLE slave device; the request data packet contains an ID used for searching for the target BLE slave device. Also disclosed in the present invention are a terminal device, a BLE slave device, and a searching system based on BLE. Compared to the prior art, the present invention enables a user to quickly find a target BLE slave device, greatly reducing the time for searching for a target BLE slave device. A target BLE device can be found by means of the terminal device without the need to deploy an iBeacon or Bluetooth AP indoors, and there is also no need for complex data processing architecture, thus reducing hardware costs.

Description

Terminal device, BLE slave device, BLE-based object-seeking method and system

Technical field

The present invention relates to the field of wireless communications, and in particular, to a terminal device, a BLE slave device, a BLE-based object-seeking method and system.

Background technique

At present, short-range wireless communication technology has been widely used in many electronic devices, such as smart phones, wristbands, wearable devices, sensors, and the like. These electronic devices support indoor positioning technology. Indoor positioning refers to the realization of positional positioning in an indoor environment. It mainly adopts an indoor position positioning system formed by integration of various technologies such as wireless communication, base station positioning, and inertial navigation positioning. In addition to the cellular positioning technology of communication networks, common indoor wireless positioning technologies include: wireless local area network (Wi-Fi), Bluetooth, infrared, ultra-wideband, radio frequency identification (RFID), Zifeng (ZigBee) and ultrasound.

The positioning methods in the prior art are mostly based on mobile devices, and the positioning system consisting of a Bluetooth application program (AP) server is configured to communicate with the server through the mobile device repeatedly transmitting the broadcast information through the Bluetooth AP. After being calculated by the server, the location information of the current mobile device is obtained and sent to the mobile device. Or, based on the iBeacon Bluetooth indoor positioning system, the positioning system comprises an iBeacon information release system, an iBeacon base station and a mobile terminal, wherein the information release system is composed of a background management system, a service authentication interface, and a radio frequency antenna; the base station is composed of a data storage module and a Bluetooth. The radio frequency antenna is composed of a data processing module, a Bluetooth transceiver module, a wireless transceiver module, a Bluetooth radio frequency receiving antenna, and a radio frequency transceiver antenna.

The above prior art has many disadvantages: 1. The Bluetooth transmission communication network is complicated to construct, and many Bluetooth APs are deployed, which is inconvenient to maintain and has high hardware cost. 2, need a dedicated server to handle by Bluetooth Data sent by the AP will cause data network delay and data bandwidth problems, which also increases system cost. 3. The local positioning device used in the invention is solidified and not flexible enough, so it is impossible to upgrade and modify various positioning methods. 4. The indoor positioning mentioned in the invention is to locate the position of the mobile terminal, and cannot locate the position of the iBeacon or the Bluetooth AP, and thus cannot locate the lost or hidden object when searching for an object.

Summary of the invention

An object of the present invention is to provide a terminal device, a BLE slave device, a BLE-based object-seeking method and system, so that a user can quickly find a target BLE slave device, which greatly shortens the time for finding a target BLE slave device. Moreover, without deploying an iBeacon or a Bluetooth AP indoors, the target BLE slave device can be found through the terminal device without requiring a complicated data processing architecture and reducing hardware costs.

In order to solve the above technical problem, an embodiment of the present invention provides a BLE-based object-seeking method, which is applied to a terminal device; a BLE-based object-seeking method includes: scanning a low-power Bluetooth BLE slave device; and scanning a target BLE slave device Thereafter, the request packet is sent to the target BLE slave device; wherein the request packet contains an identifier for finding the target BLE slave device.

The embodiment of the invention further provides a BLE-based object-finding method, which is applied to a BLE slave device; the BLE-based object-finding method comprises: periodically transmitting a broadcast data packet; and when receiving the request data packet, requesting the data packet Parsing; wherein the request packet contains an identifier for finding the target BLE slave device; when parsing the identifier, a prompt message is sent.

The embodiment of the invention further provides a BLE-based object-finding method, which is applied to a terminal device and a BLE slave device; the BLE-based object-seeking method includes: the terminal device scans a low-power Bluetooth BLE slave device; the terminal device scans to the target After the BLE slave device, the request packet is sent to the target BLE slave device; wherein the request packet includes an identifier for finding the target BLE slave device; and the target BLE slave device parses the request packet when receiving the request packet. ; among them, please The data packet contains an identifier for finding the target BLE slave device; the target BLE slave device sends a prompt message when parsing the identifier.

The embodiment of the invention further provides a terminal device, including a scanning module and a sending module; a scanning module, configured to scan a low-power Bluetooth BLE slave device; and a sending module, configured to target the BLE after scanning to the target BLE slave device The slave device sends a request packet; wherein the request packet contains an identifier for finding the target BLE slave device.

The embodiment of the present invention further provides a BLE slave device, including: a second receiving module, a second parsing module, and a prompting module; a second receiving module, configured to receive a request data packet; and a second parsing module, configured to receive When the data packet is requested, the request data packet is parsed; wherein the request data packet contains an identifier for finding the target BLE slave device; and the prompting module is configured to issue a prompt message when parsing the identifier.

The embodiment of the invention further provides a low-power Bluetooth BLE-based object-finding system, comprising: a terminal device and a BLE slave device; the terminal device comprises: a scanning module and a sending module; and the scanning module is configured to scan the low-power Bluetooth BLE a slave device: a sending module, configured to send a request data packet to the target BLE slave device after scanning to the target BLE slave device; wherein the request data packet includes an identifier for finding the target BLE slave device; the BLE slave device includes: a receiving module, a second parsing module, and a prompting module; a second receiving module, configured to receive the request data packet; and a second parsing module, configured to parse the request data packet when receiving the request data packet; wherein, the request data The packet contains an identifier for finding the target BLE slave device; the prompt module is configured to issue a prompt message when parsing the identifier.

Compared with the prior art, the embodiment of the present invention scans the low-power Bluetooth BLE slave device through the terminal device, and after scanning the target BLE slave device, sends the request data packet to the target BLE slave device. Wherein, the request data packet contains an identifier for finding a target BLE slave device. The request packet is parsed by the target BLE slave device when it receives the request packet. Wherein, the request data packet contains an identifier for finding a target BLE slave device. Target BLE slave device When parsing the identifier, a prompt message is sent, so that when the user hears the prompt information, the target BLE slave device can be quickly found. Thereby, the target BLE slave device can be directly searched through the terminal device equipped with the BLE technology without performing Bluetooth pairing in advance, which greatly shortens the time for finding the target BLE device. Moreover, without deploying iBeacon or Bluetooth AP indoors, the target BLE device can be found through the terminal device without complicated data processing architecture and hardware cost reduction.

DRAWINGS

The one or more embodiments are exemplified by the accompanying drawings in the accompanying drawings, and FIG. The figures in the drawings do not constitute a scale limitation unless otherwise stated.

1 is a flow chart of a BLE-based object-seeking method in accordance with a first embodiment of the present invention;

2 is a flow chart of a BLE-based object-seeking method in accordance with a second embodiment of the present invention;

3 is a schematic diagram of a data packet format according to a second embodiment of the present invention;

4 is a schematic diagram of a packet header format of a data packet according to a second embodiment of the present invention;

FIG. 5 is a schematic diagram of coding of a protocol data unit type according to a second embodiment of the present invention; FIG.

6 is a flowchart of a BLE-based object-seeking method according to a third embodiment of the present invention;

7 is a flowchart of a BLE-based object-seeking method according to a fourth embodiment of the present invention;

8 is a flowchart of a BLE-based object-seeking method according to a fifth embodiment of the present invention;

Figure 9 is a block diagram of a terminal device in accordance with a sixth embodiment of the present invention;

Figure 10 is a block diagram of a terminal device in a seventh embodiment of the present invention;

Figure 11 is a block diagram of a BLE slave device in accordance with an eighth embodiment of the present invention;

Figure 12 is a block diagram of a BLE slave device in accordance with a ninth embodiment of the present invention;

Figure 13 is a block diagram of a BLE based tracing system in accordance with a tenth embodiment of the present invention.

detailed description

In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail below. However, it will be apparent to those skilled in the art that, in the various embodiments of the present invention, numerous technical details are set forth in order to provide the reader with a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

A first embodiment of the present invention relates to a BLE-based method of searching for a terminal device. The specific process is shown in Figure 1, which includes:

Step 101: Scan a low power Bluetooth BLE slave device.

It is worth mentioning that the BLE slave device can be a smart device with communication function. For example, the BLE slave device can be, but is not limited to, an active pen. Also, Bluetooth on the terminal device can support the protocol of bluetooth4.1/4.2.

Specifically, the switch enable key is set for the Bluetooth of the terminal device, and when the switch enable key is triggered, the terminal device can search for a nearby BLE slave device. When the terminal device searches for a BLE slave device, the search results are listed in the form of a list. Moreover, the BLE slave device displayed in the list may include, but is not limited to, the following information: the name of the BLE slave device, the physical address (MAC address), the RSSI value (the RSSI Chinese interpretation is the received signal strength indication), and the like. Therefore, the BLE slave device can be scanned according to the name and/or MAC address of the BLE slave device.

In step 102, it is determined whether the target BLE slave device is scanned. If yes, go to step 103; otherwise, go back to step 101.

Specifically, the user can find the target BLE slave device that needs to be searched from the scan list according to the name or MAC address of the BLE slave device. Click on the imaginary to find the target BLE slave device Quasi-button. When receiving the seek instruction for the target BLE slave device, the terminal device may determine to scan to the target BLE slave device. It should be noted that in the actual design process, the target BLE slave device can also be scanned by other means. For example, each BLE slave device can be stored in advance in the terminal device. A target BLE slave device is selected from the pre-stored BLE slave devices before scanning the BLE slave device.

Step 103: Send a request packet to the target BLE slave device. Wherein, the request data packet contains an identifier for finding a target BLE slave device.

It is worth mentioning that in the actual application, when the target BLE receives the request packet from the device, it can issue a prompt message. Wherein, the prompt information may include, but is not limited to, including sound and/or light information. For example, the target BLE slave device triggers its own motor or buzzer to work. When the user hears the vibration of the motor or the sound of the buzzer, the target BLE slave can be quickly found. At present, many smart devices such as BLE slave devices in the market are equipped with motors or buzzers. For the present embodiment, an existing motor or buzzer can be utilized. Simply change the software portion of the BLE slave device to find the target BLE slave device. And it will not increase other hardware costs, and the implementation is relatively simple.

Through the above, it is not difficult to find that the present embodiment enables the target BLE slave device to be quickly found when the user hears the prompt information. Thereby, the target BLE slave device can be directly searched through the terminal device equipped with the BLE technology without performing Bluetooth pairing in advance, which greatly shortens the time for finding the target BLE device. Moreover, without deploying iBeacon or Bluetooth AP indoors, the target BLE device can be found through the terminal device without complicated data processing architecture and hardware cost reduction.

A second embodiment of the present invention relates to a BLE-based method of searching for a terminal device. The second embodiment is an improvement on the basis of the first embodiment, and the main improvement is that, in the second embodiment, after the request packet is transmitted to the target BLE slave device, if If the feedback packet is not received within a certain period of time, the request packet is sent to the target BLE slave again.

The specific process is shown in Figure 2, which includes;

In step 201, the Bluetooth BLE switch is turned on.

It is worth mentioning that Bluetooth on the terminal device can support the protocol of bluetooth4.1/4.2. Specifically, the switch enable key is set for the Bluetooth of the terminal device, and when the switch enable key is triggered, the terminal device can search for a nearby BLE slave device.

Step 202: Scan a low power Bluetooth BLE slave device.

It is worth mentioning that the BLE slave device can be a smart device with communication function. For example, the BLE slave device can be, but is not limited to, an active pen. Specifically, the Bluetooth of the BLE slave device is in an active state, which is to periodically transmit a data packet. After receiving the data packet, the terminal device may determine that the BLE slave device is scanned. When the terminal device searches for a BLE slave device, the search results are listed in the form of a list. Moreover, the BLE slave device displayed in the list may include, but is not limited to, the following information: the name of the BLE slave device, the physical address (MAC address), the RSSI value (the RSSI Chinese interpretation is the received signal strength indication), and the like.

In step 203, it is determined whether the target BLE slave device is scanned. If yes, go to step 204; otherwise, go back to step 202.

Specifically, the user can find the target BLE slave device that needs to be searched from the scan list according to the name or MAC address of the BLE slave device. Click on the virtual button used to find the target BLE slave device. At this time, it can be determined that the target BLE slave device is scanned.

Step 204: Send a request packet to the target BLE slave device. Wherein, the request data packet contains an identifier for finding a target BLE slave device.

It is worth mentioning that the request packet is a data packet of the Bluetooth broadcast channel. A Protocol Data Unit Type (PDU Type) field that identifies a packet located on the Bluetooth broadcast channel. Specifically, as shown As shown in 3, the data packet of the Bluetooth broadcast channel is composed of a 16-bit header header and a payload. As shown in FIG. 4 and FIG. 5, since the Bluetooth BLE protocol specifies that the (scan_req) data packet format of the Bluetooth broadcast channel is fixed, it cannot carry other additional information. Therefore, the scan_req can be modified in the present invention. Specifically, changing the PDU Type field in the header of the scan_req packet, the PDU Type field can be set to "0111". The other fields in the scan_req packet remain unchanged.

Step 205: Determine whether a feedback data packet is received within a preset time. If yes, then the end; otherwise, proceed to step 206. The feedback data packet includes an acknowledgement field, and the acknowledgement field is used to indicate that the target BLE is resolved from the device to the identifier. The confirmation field is located in the ScanRspData field in the feedback packet. The ScanRspData field refers to a scan feedback field or a scan response field.

In step 206, the request packet is sent to the target BLE slave again.

It should be noted that, in the actual application, if the target BLE slave device sends a prompt tone according to the request packet, the user still cannot find the target BLE slave device. For example, the user is far away from the BLE device, can not hear the prompt tone, or even if the user hears the sound, but because the distance is far away or there is obstruction, the user only knows the approximate location of the target BLE from the device according to the sound, and it is difficult to compare Quickly find the target BLE slave device. Preferably, after scanning to the target BLE slave device, the BLE-based object-finding method further comprises: sequentially acquiring the location Si of the terminal device at the terminal device at the at least two locations, and the terminal device and the target BLE slave device. The distance Ri; the position of the target BLE slave device is calculated according to the acquired Si, Ri. In this way, the target BLE slave device can be found more quickly and conveniently.

Specifically, calculating the location of the target BLE slave device according to the acquired Si and Ri, specifically including: using a weighted centroid algorithm, calculating a geometric centroid of each position of the terminal device according to the coordinates of Si and the value of Ri, the target BLE slave device Located in the area where the geometric centroid is located; or, based on the acquired Si, Ri, the position of the target BLE slave device, including: in the horizontal direction, Si is the center of the equation, and Ri is the equation formula of the radius of the circle. According to the coordinates of Si and the value of Ri, the intersection of each circle is calculated. The target BLE slave is located in the area where the intersection of each circle is common.

Preferably, the initial position of the terminal device is the coordinate origin, and the other positions of the terminal device are relative positions with respect to the initial position. The position of the target BLE slave device is a relative position with respect to the initial position. After scanning to the target BLE slave device, the BLE based method further includes: receiving a signal of the target BLE slave device. The signal strength RSSI value is obtained from the received signal. Adjust the location of the terminal device based on the resolved RSSI value. After the terminal device is adjusted to a new location, the request packet is resent to the target BLE slave device. When adjusting the position of the terminal device, the terminal device displays its own moving direction and moving distance. The terminal device also prompts for the RSSI value. Specifically, when the distance between the terminal device and the target BLE slave device changes, the RSSI value also changes. such as:

One: During the movement of the terminal device, if the RSSI signal is getting stronger. It indicates that the terminal device moves toward the target BLE slave device, and the target BLE slave device is located in the moving direction of the terminal device. The user can be prompted to target the BLE slave device in the direction of movement of the terminal device. In order to facilitate the user to control the terminal device in other locations, the acquired data is more accurate. Two: If the RSSI signal is getting weaker. It indicates that the terminal device moves away from the target BLE slave device, and the target BLE slave device is located in the opposite direction of the moving direction of the terminal device. The user may be prompted that the target BLE slave device is in the opposite direction of the direction of movement of the terminal device. In order to facilitate the user to control the terminal device in other locations, the acquired data is more accurate. Three: If the RSSI signal first becomes stronger, it gradually weakens. It indicates that the target BLE slave device is located on both sides of the mobile device's moving route. The user can be prompted that the target BLE slave device is located on both sides of the terminal device moving route. In order to facilitate the user to control the terminal device in other locations, the acquired data is more accurate.

Through the above, it is not difficult to find that the present embodiment can ensure that the request packet sent by the terminal device is received by the target BLE from the device. Avoid the situation where the target BLE cannot receive the request packet from the device, but the target BLE slave device cannot be found.

A third embodiment of the present invention relates to a BLE-based method of searching for a BLE slave device. The specific process is shown in Figure 6, which includes:

Step 601, periodically transmitting a broadcast data packet.

It is worth mentioning that the Bluetooth of the BLE slave device is in a working state, which is to periodically send data packets. Moreover, the data packets periodically sent by the BLE slave device can be scanned by the terminal device. When the terminal device scans the above data packet, the request packet may be sent to the BLE slave device.

Step 602: Determine whether a request packet is received. If yes, go to step 603; otherwise, go to step 601. Wherein, the request data packet contains an identifier for finding a target BLE slave device.

In step 603, the request data packet is parsed.

It is worth mentioning that the request packet is a data packet of the Bluetooth broadcast channel. The target BLE slave parses the header of the request packet.

In step 604, it is determined whether the identifier is resolved. If yes, go to step 605; otherwise, go back to step 601.

In step 605, a prompt message is sent.

Wherein, the prompt information may include, but is not limited to, including sound and/or light information. In practical applications, the target BLE slave device triggers its own motor or buzzer to operate. When the user hears the vibration of the motor or the sound of the buzzer, the target BLE slave can be quickly found.

Through the above, it is not difficult to find that the present embodiment enables the target BLE slave device to be quickly found when the user hears the prompt information. Thereby, the target BLE slave device can be directly searched through the terminal device equipped with the BLE technology without performing Bluetooth pairing in advance, which greatly shortens the time for finding the target BLE device. Moreover, without deploying an iBeacon or a Bluetooth AP indoors, the target BLE device can be found through the terminal device without requiring a complicated data processing architecture, Reduce hardware costs.

A fourth embodiment of the present invention relates to a BLE-based method of searching for a BLE slave device. The fourth embodiment is an improvement on the basis of the third embodiment, and the main improvement is that in the fourth embodiment, when parsing the identifier, the feedback data packet is transmitted to the terminal device.

The specific process is shown in Figure 7, which includes:

In step 701, a broadcast data packet is periodically sent.

In step 702, it is determined whether a request packet is received. Wherein, the request data packet contains an identifier for finding a target BLE slave device. If yes, go to step 703; otherwise, go to step 701.

The request packet is a packet of a Bluetooth broadcast channel. A protocol data unit type PDU Type field that identifies a data packet located on the Bluetooth broadcast channel.

Step 703, parsing the request data packet.

In step 704, it is determined whether the identifier is resolved. If yes, go to step 705; otherwise, go back to step 701.

It should be noted that the data packet of the Bluetooth broadcast channel is composed of a 16-bit header header and a payload. Bluetooth scan channel (scan_req) data as specified in the Bluetooth BLE protocol The package format is fixed and cannot carry other additional information. Therefore, the scan_req can be modified in the present invention. Specifically, changing the PDU Type field in the header of the scan_req packet, the PDU Type field can be set to "0111". The other fields in the scan_req packet remain unchanged. Specifically, when parsing into the PDU Type field is "0111", it can be determined that the identifier is resolved.

In step 705, a prompt message is sent.

Step 706: Send a feedback data packet to the terminal device. The feedback data packet includes an acknowledgement field, and the acknowledgement field is used to indicate that the target BLE is resolved from the device to the identifier. The confirmation field is located in the ScanRspData field in the feedback packet.

It is worth mentioning that the target BLE sends a feedback data packet from the device to the terminal device, and is sent on the same channel as the terminal device sends the request data packet. Also, step 706 in the present embodiment is not limited to being performed after step 705. Step 706 may also be performed first, and then step 705 is performed. Alternatively, step 705 and step 706 are performed simultaneously.

A fifth embodiment of the present invention relates to a BLE-based method of searching for a terminal device and a BLE slave device.

It is worth mentioning that the Bluetooth of the BLE slave device is in a working state, which is that the target BLE slave device periodically transmits data packets. And, the data packet periodically sent by the BLE slave device can be The terminal device scanned it. When the terminal device scans the above data packet, the request packet may be sent to the BLE slave device.

The specific process of the BLE-based object-seeking method is shown in FIG. 8, which includes:

In step S1, the terminal device scans the low power Bluetooth BLE slave device.

Specifically, the switch enable key is set for the Bluetooth of the terminal device, and when the switch enable key is triggered, the terminal device can search for a nearby BLE slave device. When the terminal device searches for a BLE slave device, the search results are listed in the form of a list. Moreover, the BLE slave device displayed in the list may include, but is not limited to, the following information: the name of the BLE slave device, the physical address (MAC address), the RSSI value (the RSSI Chinese interpretation is the received signal strength indication), and the like.

In step S2, the terminal device determines whether the target BLE slave device is scanned. If yes, go to step S3; otherwise, return to step S1.

Specifically, the user can find the target BLE slave device that needs to be searched from the scan list according to the name or MAC address of the BLE slave device. Click on the virtual button used to find the target BLE slave device. At this time, it can be determined that the target BLE slave device is scanned. It should be noted that in the actual design process, the target BLE slave device can also be scanned by other means. For example, each BLE slave device can be stored in advance in the terminal device. A target BLE slave device is selected from the pre-stored BLE slave devices before scanning the BLE slave device.

In step S3, the terminal device sends a request data packet to the target BLE slave device. Wherein, the request data packet contains an identifier for finding a target BLE slave device.

In step S4, the target BLE determines from the device whether the request packet is received. If yes, go to step S5; otherwise, go back to step S4.

In step S5, the target BLE slave device parses the request packet. Wherein, the request data packet contains an identifier for finding a target BLE slave device.

In step S6, the target BLE determines whether the device resolves to the identifier. If yes, go to step S7; otherwise, go back to step S4.

In step S7, a prompt message is sent.

In practical applications, the target BLE slave device triggers its own motor or buzzer to operate. When the user hears the vibration of the motor or the sound of the buzzer, the target BLE slave can be quickly found.

The steps of the above various methods are divided for the sake of clear description. The implementation may be combined into one step or split into certain steps and decomposed into multiple steps. As long as the same logical relationship is included, it is within the protection scope of this patent. The addition of insignificant modifications to an algorithm or process, or the introduction of an insignificant design, without changing the core design of its algorithms and processes, is covered by this patent.

A sixth embodiment of the present invention relates to a terminal device, as shown in FIG. 9, including a scanning module 91 and a transmitting module 92. The scanning module 91 is used to scan a low power Bluetooth BLE slave device. The sending module 92 is configured to send a request data packet to the target BLE slave device after scanning to the target BLE slave device. Wherein, the request data packet contains an identifier for finding a target BLE slave device.

It is not difficult to find that the present embodiment is an apparatus embodiment corresponding to the first embodiment, and the present embodiment can be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still effective in the present embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related art details mentioned in the present embodiment can also be applied to the first embodiment.

It is worth mentioning that each module involved in this embodiment is a logic module. In practical applications, a logical unit may be a physical unit, a part of a physical unit, or multiple physical entities. A combination of units is implemented. In addition, in order to highlight the innovative part of the present invention, the present embodiment does not introduce a unit that is not closely related to solving the technical problem proposed by the present invention, but this does not mean that there are no other units in the present embodiment.

A seventh embodiment of the present invention relates to a terminal device. The seventh embodiment is an improvement on the basis of the sixth embodiment, and the main improvement is that in the seventh embodiment, the terminal device further includes a judging module.

Specifically, as shown in FIG. 10, the terminal device includes a scanning module 91 and a transmitting module 92. The scanning module 91 is used to scan a low power Bluetooth BLE slave device. The sending module 92 is configured to send a request data packet to the target BLE slave device after scanning to the target BLE slave device. Wherein, the request data packet contains an identifier for finding a target BLE slave device. The request packet is a data packet of a Bluetooth broadcast channel. A protocol data unit type PDU Type field that identifies a data packet located on the Bluetooth broadcast channel.

The terminal device further includes an obtaining module and a calculating module, and the acquiring module is configured to acquire, after the scanning module scans the target BLE slave device, the terminal device at the at least two locations, obtain the current location Si of the terminal device, and the terminal device. a distance Ri from the target BLE slave device; a calculation module, configured to calculate a location of the target BLE slave device according to the acquired Si, Ri. Specifically, the calculation module is further configured to calculate, by using a weighted centroid algorithm, a geometric centroid of each position of the terminal device according to the coordinates of the Si and the value of Ri, where the target BLE slave device is located in the region where the geometric centroid is located; or, The module is also used to calculate the intersection of each circle in the horizontal direction with Si as the center and Ri as the radius of the equation. According to the coordinates of Si and the value of Ri, the target BLE slave is located in each circle. The area where the intersection points are shared.

The initial position of the terminal device is a coordinate origin, and the other positions of the terminal device are relative positions with respect to the initial position; the position of the target BLE slave device is a relative position with respect to the initial position.

The terminal device also includes a judging module 93. The determining module 93 is configured to determine whether a feedback data packet is received within a preset time. Among them, the feedback data packet contains an acknowledgement field. The confirmation field is used to indicate that the target BLE is resolved from the device to the identity. The sending module 92 is further configured to send the request data packet to the target BLE slave device again when the feedback data packet is not received within the preset time. The confirmation field is located in the ScanRspData field in the feedback packet.

In addition, the terminal device further includes an open mode 94 and a lookup module 95. The on module 94 is used to turn on the Bluetooth BLE switch before scanning the Bluetooth BLE slave. The lookup module 95 is configured to find the target BLE slave device from the name or physical address of the device according to the target BLE from the list obtained by the scan.

It should be noted that, in the actual application, if the target BLE slave device sends a prompt tone according to the request packet, the user still cannot find the target BLE slave device. For example, the user and the BLE slave device are far away and cannot hear the prompt tone. Then, after the terminal device is adjusted to a new location, the request packet is sent to the target BLE slave device. Preferably, the terminal device further comprises a first receiving a module, a first parsing module, and an adjusting module; a first receiving module, configured to receive a signal of the target BLE slave device; a first parsing module, configured to parse the signal strength RSSI value from the received signal; and an adjustment module, configured to Parsing the RSSI value to adjust the location of the terminal device. When adjusting the position of the terminal device, the terminal device displays its own moving direction and moving distance. The terminal device also prompts for the RSSI value. Specifically, when the distance between the terminal device and the target BLE slave device changes, the RSSI value also changes. such as:

Since the second embodiment and the present embodiment correspond to each other, the present embodiment can be implemented in cooperation with the second embodiment. The related technical details mentioned in the second embodiment are still effective in the present embodiment, and the technical effects that can be achieved in the second embodiment can also be implemented in the present embodiment. To reduce the repetition, details are not described herein again. Accordingly, the related art details mentioned in the present embodiment can also be applied to the second embodiment.

An eighth embodiment of the present invention relates to a BLE slave device. As shown in FIG. 11, the second embodiment includes a second receiving module 112, a second parsing module 113, and a prompting module 114. The second receiving module 112 is configured to receive the request data packet. The second parsing module 113 is configured to parse the request packet when receiving the request packet. Wherein, the request data packet contains an identifier for finding a target BLE slave device. The prompting module 114 is configured to issue a prompt message when parsing the identifier.

Since the third embodiment and the present embodiment correspond to each other, the present embodiment can be implemented in cooperation with the third embodiment. The technical details mentioned in the third embodiment are still effective in the present embodiment, and the technical effects that can be achieved in the third embodiment are also implemented in the present embodiment. To reduce the repetition, details are not described herein again. Accordingly, the related art details mentioned in the present embodiment can also be applied to the third embodiment.

A ninth embodiment of the present invention relates to a BLE slave device. The ninth embodiment is an improvement on the basis of the eighth embodiment, and the main improvement is that in the ninth embodiment, the BLE slave device further includes a feedback module.

Specifically, as shown in FIG. 12, the BLE slave device includes: a second receiving module 112, a second parsing module 113, and a prompting module 114. The second receiving module 112 is configured to receive the request data packet. The second parsing module 113 is configured to parse the request packet when receiving the request packet. Wherein, the request data packet contains an identifier for finding a target BLE slave device. The prompting module 114 is configured to issue a prompt message when parsing the identifier.

In addition, the BLE slave device further includes a feedback module 115. The feedback module 115 is configured to send a feedback data packet to the terminal device when parsing the identifier. Among them, the feedback data packet contains an acknowledgement field. The confirmation field is used to indicate that the target BLE is resolved from the device to the identity. The confirmation field is located in the ScanRspData field in the feedback packet.

Since the fourth embodiment and the present embodiment correspond to each other, the present embodiment can be implemented in cooperation with the fourth embodiment. The related technical details mentioned in the fourth embodiment are still effective in the present embodiment, and the technical effects that can be achieved in the fourth embodiment are also implemented in the present embodiment. To reduce the repetition, details are not described herein again. Accordingly, the related art details mentioned in the present embodiment can also be applied to the fourth embodiment.

A tenth embodiment of the present invention relates to a BLE-based object-finding system, as shown in FIG. 13, including a terminal device 131 and a BLE slave device 132. The terminal device 131 includes a scanning module 1311 and a transmitting module 1312. The scanning module 1311 is configured to scan a low power Bluetooth BLE slave device. The sending module 1312 is configured to send a request data packet to the target BLE slave device after scanning to the target BLE slave device. Wherein, the request data packet contains an identifier for finding a target BLE slave device. The BLE slave device includes 132: a second receiving module 1322, a second parsing module 1323, and a prompting module 1324. The second receiving module 1322 is configured to receive the request data packet. The second parsing module 1323 is configured to parse the request packet when the request packet is received. Wherein, the request data packet contains an identifier for finding a target BLE slave device. The prompting module 1324 is configured to issue a prompt message when parsing the identifier.

Since the fifth embodiment and the present embodiment correspond to each other, the present embodiment can be implemented in cooperation with the fifth embodiment. Related technical details mentioned in the fifth embodiment are in the present embodiment The technical effects that can be achieved in the fifth embodiment are also implemented in the present embodiment. To reduce the repetition, details are not described herein again. Accordingly, the related technical details mentioned in the present embodiment can also be applied to the fifth embodiment.

Through the above, it is not difficult to find that the present embodiment enables the target BLE slave device 132 to be quickly found when the user hears the prompt information. Thereby, the target BLE slave device 132 can be directly searched through the terminal device 131 equipped with the BLE technology without performing Bluetooth pairing in advance, which greatly shortens the time for finding the target BLE device 132. Moreover, the target BLE device 132 can be found through the terminal device without deploying the iBeacon or the Bluetooth AP indoors, without requiring a complicated data processing architecture and reducing hardware costs.

Those skilled in the art can understand that all or part of the steps of implementing the above embodiments may be completed by a program instructing related hardware, and the program is stored in a storage medium, and includes a plurality of instructions for making a device (which may be a single chip microcomputer). The chip, etc. or processor executes all or part of the steps of the various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

A person skilled in the art can understand that the above embodiments are specific embodiments for implementing the present invention, and various changes can be made in the form and details without departing from the spirit and scope of the present invention. range.

Claims

A BLE-based method for searching objects, which is characterized in that it is applied to a terminal device;

The BLE-based method of searching includes:

Scanning a low-power Bluetooth BLE slave device;

After scanning to the target BLE slave device, the request data packet is sent to the target BLE slave device; wherein the request data packet contains an identifier for finding the target BLE slave device.
The BLE-based object-finding method according to claim 1, wherein after the scanning to the target BLE slave device, the BLE-based object-finding method further comprises:

The terminal device is located at at least two locations, and the location Si where the terminal device is currently located, and the distance Ri between the terminal device and the target BLE slave device are acquired;

Calculating the location of the target BLE slave device according to the acquired Si, Ri.
The BLE-based object-finding method according to claim 2, wherein an initial position of the terminal device is a coordinate origin, and other positions of the terminal device are relative positions with respect to the initial position;

The position of the target BLE slave device is a relative position relative to the initial position.
The BLE-based object-finding method according to claim 3, wherein after the scanning to the target BLE slave device, the BLE-based object-finding method further comprises:

Receiving a signal of the target BLE slave device;

Extracting a signal strength RSSI value from the received signal;

Adjusting the location of the terminal device according to the parsed RSSI value.
The BLE-based object-finding method according to claim 4, wherein the calculating the location of the target BLE slave device according to the obtained Si, Ri, specifically includes: Using a weighted centroid algorithm, calculating a geometric centroid of each position of the terminal device according to the coordinates of Si and the value of Ri, the target BLE slave device is located in the region where the geometric centroid is located;

Alternatively, the calculating the position of the target BLE slave device according to the obtained Si, Ri includes: an equation formula in which the center of Si is in the horizontal direction and the radius is a circle with Ri as a radius, according to The coordinates of Si and the value of Ri are calculated, and the intersection of each circle is calculated, and the target BLE slave device is located in an area where the intersections shared by each circle are located.
The BLE-based object-finding method according to claim 1, wherein the request data packet is a data packet of a Bluetooth broadcast channel;

The identifier is located in a protocol data unit type PDUType field of a data packet of the Bluetooth broadcast channel.
The BLE-based object-finding method according to claim 1, wherein after the requesting the data packet to the target BLE slave device, the BLE-based object-finding method further comprises:

Determining whether a feedback data packet is received in a preset time; wherein the feedback data packet includes an acknowledgement field, where the acknowledgement field is used to indicate that the target BLE is resolved from the device to the identifier;

When the feedback data packet is not received within the preset time, the request data packet is sent to the target BLE slave device again.
The BLE-based object-finding method according to claim 1, wherein the BLE-based object-finding method further comprises: before the scanning the low-power Bluetooth BLE slave device:

Turn on the Bluetooth BLE switch;

The scanning to the target BLE slave device specifically includes:

From the list obtained by the scanning, the target BLE slave device is searched for from the name and/or physical address of the device according to the target BLE.
A BLE-based method for searching objects, which is characterized in that it is applied to a BLE slave device;

The BLE-based method of searching includes:

Parsing the request data packet when receiving the request data packet; wherein the request data packet includes an identifier for finding the target BLE slave device;

A prompt message is issued when parsing the identifier.
The BLE-based object-finding method according to claim 9, wherein the prompt information comprises sound and/or light.
The BLE-based object-finding method according to claim 9, wherein the request data packet is a data packet of a Bluetooth broadcast channel;

The identifier is located in a protocol data unit type PDUType field of a data packet of the Bluetooth broadcast channel.
The BLE-based object-finding method according to claim 10 or 11, wherein the BLE-based object-finding method further comprises:

Sending a feedback data packet to the terminal device; wherein the feedback data packet includes an acknowledgement field, where the acknowledgement field is used to indicate that the target BLE is resolved from the device to the identifier.
A BLE-based method for searching objects, which is characterized in that it is applied to a terminal device and a BLE slave device;

The BLE-based method of searching includes:

The terminal device scans a low power Bluetooth BLE slave device;

After scanning the target BLE slave device, the terminal device sends a request data packet to the target BLE slave device; wherein the request data packet includes an identifier for finding the target BLE slave device;

The target BLE slave device parses the request data packet when receiving the request data packet; wherein the request data packet includes an identifier for finding the target BLE slave device;

The target BLE slave device issues a prompt message when parsing the identifier.
A terminal device, comprising: a scanning module and a sending module;

The scanning module is configured to scan a low power Bluetooth BLE slave device;

The sending module is configured to send a request data packet to the target BLE slave device after scanning to the target BLE slave device, where the request data packet includes an identifier for finding the target BLE slave device.
The terminal device according to claim 14, wherein the terminal device further comprises an obtaining module and a calculating module;

The acquiring module is configured to: after the scanning module scans to the target BLE slave device, sequentially locate the terminal device at at least two locations, acquire a location Si where the terminal device is currently located, and the terminal device and the target The distance between the BLE slave devices Ri;

The calculating module is configured to calculate a location of the target BLE slave device according to the acquired Si, Ri.
The terminal device according to claim 15, wherein an initial position of the terminal device is a coordinate origin, and other positions of the terminal device are relative positions with respect to the initial position;

The position of the target BLE slave device is a relative position relative to the initial position.
The terminal device according to claim 16, wherein the terminal device further comprises a first receiving module, a first analyzing module and an adjusting module;

The first receiving module is configured to receive a signal of the target BLE slave device;

The first parsing module is configured to parse the signal strength RSSI value from the received signal;

The adjusting module is configured to adjust a location where the terminal device is located according to the parsed RSSI value.
The terminal device according to claim 17, wherein

The calculation module is further configured to calculate, by using a weighted centroid algorithm, a geometric centroid of each position of the terminal device according to the coordinates of the Si and the value of the Ri, the target BLE slave device is located in the region where the geometric centroid is located;

Alternatively, the calculation module is further configured to calculate an intersection point of each circle according to the coordinate of the Si and the value of Ri in a horizontal direction with a center of Si as a center and a radius of a radius of Ri as a circle formula. The target BLE slave device is located in the area where the intersections shared by each circle are located.
The terminal device according to claim 14, wherein the request data packet is a data packet of a Bluetooth broadcast channel;

The identifier is located in a protocol data unit type PDUType field of a data packet of the Bluetooth broadcast channel.
The terminal device according to claim 14, wherein the terminal device further comprises a determining module;

The determining module is configured to determine whether a feedback data packet is received in a preset time, where the feedback data packet includes an acknowledgement field, where the acknowledgement field is used to indicate that the target BLE is resolved from the device to the identifier ;

The sending module is further configured to send the request data packet to the target BLE slave device again when the feedback data packet is not received within the preset time.
The terminal device according to claim 14, wherein the terminal device further comprises an opening module and a searching module;

The opening module is configured to turn on a Bluetooth BLE switch before scanning the low power Bluetooth BLE slave device;

The searching module is configured to search for a target BLE slave device from the name or physical address of the device according to the target BLE from the list obtained by the scanning.
A BLE slave device, comprising: a second receiving module, a second parsing module, and a prompting module;

The second receiving module is configured to receive a request data packet;

The second parsing module is configured to parse the request data packet when receiving the request data packet, where the request data packet includes an identifier for finding the target BLE slave device;

The prompting module is configured to issue prompt information when parsing the identifier.
The BLE-based object-finding method according to claim 22, wherein the prompt information comprises sound and/or light.
The BLE slave device according to claim 22, wherein the request data packet is a data packet of a Bluetooth broadcast channel;

The identifier is located in a protocol data unit type PDUType field of a data packet of the Bluetooth broadcast channel.
The BLE slave device according to any one of claims 22 to 24, wherein the BLE slave device further comprises a feedback module;

The feedback module is configured to send a feedback data packet to the terminal device when parsing the identifier, where the feedback data packet includes an acknowledgement field, where the acknowledgement field is used to indicate that the target BLE is parsed from the device The identification.
A BLE-based object-finding system, comprising: a terminal device and a BLE slave device;

The terminal device includes: a scanning module and a sending module;

The scanning module is configured to scan a low power Bluetooth BLE slave device;

The sending module is configured to send a request data packet to the target BLE slave device after scanning to the target BLE slave device, where the request data packet includes a target for searching for the target The identity of the BLE slave device;

The BLE slave device includes: a second receiving module, a second parsing module, and a prompting module;

The second receiving module is configured to receive a request data packet;

The second parsing module is configured to parse the request data packet when receiving the request data packet, where the request data packet includes an identifier for finding the target BLE slave device;

The prompting module is configured to issue prompt information when parsing the identifier.