WO2018133311A1

WO2018133311A1 - Indoor positioning method and device

Info

Publication number: WO2018133311A1
Application number: PCT/CN2017/088259
Authority: WO
Inventors: 李念
Original assignee: 华为技术有限公司
Priority date: 2017-01-20
Filing date: 2017-06-14
Publication date: 2018-07-26
Also published as: CN108370492A; CN108370492B

Abstract

An indoor positioning method comprises: a first device transmitting a first signal to a second device in a first region, the first signal being used to trigger the second device to transmit a beacon signal, and the beacon signal carrying an identifier of the second device; the first device detecting a signal strength of the beacon signal transmitted by the second device; and the first device determining, according to the signal strength of the beacon signal and the identifier carried by the beacon signal, a location of the first device relative to the second device. The method employs, according to a home intelligent service and a home environment characteristic, existing intelligent home appliances to realize, by means of software control and an algorithm, an indoor positioning function with respect to a user without deploying a base station or increasing costs, thereby having great potential for home intelligent services and new intelligent services.

Description

Method and device for indoor positioning

This application claims the priority of the Chinese Patent Application filed on January 20, 2017, the Chinese Patent Office, Application No. 201710046272.9, entitled "A Method and Apparatus for Realizing Indoor Positioning Using Smart Home Appliances", the entire contents of which are incorporated by reference. Combined in this application.

Technical field

The present invention relates to the field of communications, and in particular, to a method and device for indoor positioning.

Background technique

With the development of smart homes, more and more types of smart home appliances have made the functions of traditional home appliances more abundant, which has brought great convenience to people's lives. As shown in FIG. 1, the smart home system can be composed of a smart home appliance, a control terminal, and a cloud server. Among them, a smart home system may have multiple smart home appliances, smart home appliances may have functions such as networking, remote control, status reporting, etc., and may also have programming or timing functions; the control terminal is a device that controls the operation of smart home appliances, and may be fixed. It can also be mobile. The fixed control terminal can be a switch, an operation panel, etc. The mobile control terminal can be a smart phone, a tablet computer, etc., and the mobile control terminal can pass through a wireless local area network, Bluetooth, ZigBee or a mobile communication network. The communication method communicates with the smart home appliance, so that the control of the smart home appliance can be realized in the home or outside the home. The cloud server, also called the Internet of Things (IoT) cloud server, can store information about smart appliances, control smart appliances, and forward or record messages and commands between the control terminal and smart appliances. It can be understood that the control terminal can directly control the smart home appliance, and can also control the smart home appliance through the cloud server. Generally, a mobile control terminal, such as a smart phone, can manage smart home appliances through a smart home appliance management application (application, APP) running thereon.

Indoor positioning technology is also a technology that has progressed rapidly and is being commercialized in recent years. With the advancement of electronic devices in miniaturization, high performance, low cost, and low power consumption, it is possible to construct such positioning systems in public places. Currently mainly used in: indoor navigation, logistics, car search, commercial promotion, targeted advertising, flow analysis, medical rescue, VR and so on. The application of indoor positioning technology is mainly for public places such as enterprises and shopping malls, and the cost is high. There is no civilian positioning technology suitable for the complex and small space environment of the family.

Summary of the invention

In view of this, the embodiments of the present application provide a method and device for indoor positioning, which utilizes existing smart home appliances to implement indoor positioning functions for users through software control and algorithms.

In a first aspect, the embodiment of the present application provides a method for indoor positioning, where the method includes: the first device sends a first signal to a second device in the first area; and the first signal is used to trigger the second device to send Transmitting a beacon signal, the beacon signal carrying an identifier of the second device; the first device detecting a signal strength of a beacon signal sent by the second device; the first device according to the beacon signal The signal strength and the identity carried by the beacon signal determine the location of the first device relative to the second device.

In a possible design, the first area includes a plurality of second areas, and the plurality of second devices are in the Determining, by the first device, the location of the first device relative to the second device according to the signal strength of the beacon signal and the identifier carried by the beacon signal, specifically: according to: The signal strength and the identifier determine a second device that is not more than the first distance from the first device, and the first device is in the same second region as the found second device.

In a possible design, the determining, by the signal strength and the identifier, the second device that is not more than the first distance from the first device, specifically includes: sending, respectively, the multiple second devices Selecting, in the beacon signal, a beacon signal whose signal strength is greater than the first threshold; determining, by the second device that is characterized by the identifier carried by the beacon signal whose signal strength is greater than the first threshold, as the first device A second device that does not exceed the first distance.

In a possible design, the first device determines the location of the first device relative to the second device according to the signal strength of the beacon signal sent by the second device, and specifically includes: according to the signal The strength and the identification determine a second device that is closest to the first device, the first device being at or near the location of the second device.

In a possible design, the determining, by the signal strength and the identifier, the second device that is closest to the first device, specifically includes: a beacon signal separately sent from the multiple second devices And determining, by the beacon signal having the highest signal strength, the second device characterized by the identifier carried by the beacon signal with the highest signal strength as the second device that is closest to the first device.

In a possible design, the first device determines the location of the first device relative to the second device according to the signal strength of the beacon signal sent by the second device, and specifically includes: according to the signal The strength and the identifier determine at least two second devices that are closest to the first device, and the first device is between the at least two second devices.

In a possible design, the determining, according to the signal strength and the identifier, the at least two second devices that are closest to the first device, specifically: sending the information from the multiple second devices separately In the beacon signal, at least two beacon signals (the signal strength is the largest) are selected in order of high to low signal strength; the signal strength difference between the at least two beacon signals does not exceed the second threshold; And determining, by the at least two second devices that are characterized by the identifiers carried by the at least two beacon signals, the at least two second devices that are closest to the first device.

In a possible design, the method further includes: determining whether the network to which the first device is connected and whether the signal strength of the network signal detected by the first device changes, and if there is no change, determining the first The location of the device has not changed.

In a possible design, the method further includes: receiving a voice control instruction input by a user; determining a second device that matches the voice control instruction; and the matched second device is configured with the voice control instruction to be a function of controlling; determining whether the voice control instruction indicates a second device to be controlled, and if not, determining, in the second device that matches the voice control command, a second device that is closest to the first device The second device to be controlled.

In one possible design, the first device is a mobile terminal and the second device is a smart home device.

Through the above indoor positioning method, under the premise of not setting up the base station and not increasing the user cost, the existing smart home appliance is utilized for the home intelligent service and the home environment, and the indoor positioning function of the user is realized through software control and algorithm. It provides a lot of room for development and the possibility of new intelligent business for the home intelligence business.

In a second aspect, the embodiment of the present application provides an indoor positioning device, where the device includes: the indoor positioning device sends a first signal to a second device in a first area; the first signal is used to trigger a second The device sends a beacon signal, The beacon signal carries an identifier of the second device; the indoor positioning device detects a signal strength of a beacon signal sent by the second device; the indoor positioning device is based on a signal strength of the beacon signal and The identifier carried by the beacon signal determines a location of the indoor positioning device relative to the second device.

In a possible design, the first area includes a plurality of second areas, and the plurality of second devices are in the plurality of second areas; the indoor positioning device is based on the signal of the beacon signal The strength and the identifier carried by the beacon signal determine the location of the indoor positioning device relative to the second device, and specifically: determining, according to the signal strength and the identifier, that the indoor positioning device is not more than the first A second device of the distance, the indoor positioning device being in the same second region as the found second device.

In a possible design, the determining, by the identifier and the identifier, the second device that is not more than the first distance from the indoor positioning device, specifically includes: sending, respectively, the multiple second devices Selecting, in the beacon signal, a beacon signal having a signal strength greater than a first threshold; determining, by the second device identified by the identifier carried by the beacon signal having the signal strength greater than the first threshold, the indoor positioning device A second device that does not exceed the first distance.

In a possible design, the indoor positioning device determines the position of the indoor positioning device relative to the second device according to the signal strength of the beacon signal sent by the second device, and specifically includes: according to the signal The strength and the identification determine a second device that is closest to the indoor positioning device, the indoor positioning device being at or near the location of the second device.

In a possible design, the determining, by the signal strength and the identifier, the second device that is closest to the indoor positioning device, specifically includes: a beacon signal separately sent from the multiple second devices The second device that is characterized by the identifier of the beacon signal having the highest signal strength is determined as the second device that is closest to the indoor positioning device.

In a possible design, the indoor positioning device determines the position of the indoor positioning device relative to the second device according to the signal strength of the beacon signal sent by the second device, and specifically includes: according to the signal The strength and the identifier determine at least two second devices that are closest to the indoor positioning device, and the indoor positioning device is between the at least two second devices.

In a possible design, the determining, according to the signal strength and the identifier, the at least two second devices that are closest to the indoor positioning device, specifically: sending the information from the multiple second devices separately In the beacon signal, at least two beacon signals (the signal strength is the largest) are selected in order of high to low signal strength; the signal strength difference between the at least two beacon signals does not exceed the second threshold; And determining, by the at least two second devices that are characterized by the identifiers carried by the at least two beacon signals, the at least two second devices that are closest to the indoor positioning device.

In a possible design, the indoor positioning device further includes: determining whether the network to which the indoor positioning device is connected and whether the signal strength of the network signal detected by the indoor positioning device changes, if there is no change, determining The location of the indoor positioning device has not changed.

In a possible design, the indoor positioning device further includes: a voice control instruction for receiving a user input; determining a second device that matches the voice control command; and the matched second device is configured with the voice control Determining a function to be controlled; determining whether the voice control instruction indicates a second device to be controlled, and if not instructing, a second device in the second device that matches the voice control command and closest to the indoor positioning device Determined as the second device to be controlled.

In one possible design, the indoor positioning device is a mobile terminal and the second device is a smart home device.

Through the above-mentioned indoor positioning equipment, under the premise of not setting up the base station and not increasing the user cost, the existing intelligent home appliances are utilized for the home smart service and the home environment, and the indoor positioning function of the user is realized through software control and algorithms. It provides a lot of room for development and the possibility of new intelligent business for the home intelligence business.

In a third aspect, an embodiment of the present application provides a system for indoor positioning, including a first device and a second device, which can be used to perform the method of the first aspect.

In a fourth aspect, an embodiment of the present application provides a computer storage medium, where computer instructions are stored, where the computer instructions are used to execute the method of the first aspect.

Through the above scheme, under the premise of not setting up the base station and not increasing the user cost, using the existing smart home appliances for the characteristics of the home smart service and the home environment, the indoor positioning function for the user is realized through the software control and the algorithm, and the home intelligence is provided. The business offers a lot of room for development and the possibility of new smart services.

DRAWINGS

FIG. 1 is a schematic structural diagram of an intelligent home system according to an embodiment of the present application;

2 is a schematic structural diagram of another smart home system according to an embodiment of the present application;

3 is a schematic diagram of internal modules of an intelligent terminal and a smart home appliance according to an embodiment of the present application;

4 is a schematic diagram of distribution of smart home appliances according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of interaction between a mobile phone APP and a smart home appliance according to an embodiment of the present application;

FIG. 6 is a schematic diagram of positioning calculation according to signal strength according to an embodiment of the present application;

FIG. 7 is a schematic diagram of another positioning calculation according to signal strength according to an embodiment of the present application; FIG.

FIG. 8 is a schematic diagram of another positioning calculation according to signal strength according to an embodiment of the present application.

detailed description

The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. Based on the embodiments of the present invention, those skilled in the art can obtain other embodiments without any creative work, which are all within the scope of the present invention.

At present, indoor positioning technology is mostly wireless positioning, mainly including the following:

1) Bluetooth positioning - By distributing a certain number of Bluetooth base stations indoors, the user's handheld terminal (such as a smart phone) measures the position of the relative base station by means of triangulation, and can achieve sub-meter accuracy.

2) Ultra-wideband (UWB) positioning, also through the indoor distribution base station, transmitting ultra-wideband signals, positioning the moving tags, the accuracy can reach the sub-meter level.

3) Wireless signal positioning such as WiFi and Zigbee, although the signals used are different, the effect and cost are different, but in principle, the measurement is performed on multiple indoor signal sources (base stations), and it is usually necessary to place the base station according to the positioning accuracy and range distribution. .

The above three positioning technologies generally adopt the radio frequency multi-base station networking technology to form a coverage without a blind zone, and calculate the position of the surrounding signal by the receiver to detect the surrounding signal and measure the signal strength. However, the shortcomings of this type of technology are also obvious: first, the cost is high, and a large number of base stations need to be deployed, which are usually used in relatively open environments, such as warehouses and shopping malls, which need to be in the ceiling. Base stations are installed every few meters to ten meters on walls and pillars. The wiring, installation and maintenance are complicated. Secondly, the wireless signal needs an open communication environment. It is not suitable for the home environment. Even if there are many base stations, the coverage area cannot be solved. And harmful interference will be formed; professional positioning is required to form the positioning function, that is, first, enough Bluetooth transmitters should be laid in the engineering construction, and then the signal coverage of each transmitter is converted into positioning information through engineering measurement, and finally the software is developed. To complete the positioning function. Therefore these solutions are only suitable for commercial or industrial applications and are not suitable for home use.

In addition, there is a class of non-electromagnetic wave wireless positioning technology, each of which has its own characteristics, and its shortcomings are also very obvious, which limits the practical application, such as: (1) Ultrasonic positioning, the mobile terminal locates its position by measuring multiple ultrasonic transmitters. . This technology is not costly, but because of the presence of acoustic wave blocking and reflection, it can usually only be used for proximity detection, such as reversing radar. (2) LED positioning, transmitting coded signals through the lamps, the mobile terminal detects the signals emitted by different lamps to achieve positioning, can only be used in the environment where the lights need to be turned on, and the lamps need to be modified, the cost is also very high, and a special terminal is needed. Not suitable for personal applications.

In addition, the method of calculating the position by signal strength may not be used, and is usually used for a specific environment, and is not dedicated to the positioning function, such as: (1) access control positioning, by placing a label detecting device on the channel, determining the person who needs to be positioned or In which room the object is located, not only the precision is low, but also the construction of the basic settings is required; (2) visual positioning, the object is identified by the camera, the position and distance are determined, and the video monitoring and high-performance image processing without dead zone are required. The cost is also high. These two positioning technologies have poor positioning capabilities and are rarely used alone as positioning technology applications.

There are certain differences between the indoor positioning in the home and the indoor positioning of the public place. The main manifestations are: strict cost requirements, no increase in requirements or minimal increase in cost, and cannot be achieved by means of a large number of points; low precision requirements, usually located to somewhere The room or close to a certain equipment can meet the requirements; the number of users is small, there is no need to consider the situation of a large number of users at the same time, usually there are only a few users in the home; the space is small, the room in the home is usually only a few tens of square meters, the existing technology Not suitable for use in these environments; technology is urgently implemented and requires practical use in the near future.

In the embodiment of the present application, under the premise of not setting up the base station and not increasing the user cost, the smart home appliance is used for the home smart service and the home environment, and the indoor positioning function of the user is realized through software control and algorithm, and the home intelligence is provided. The business provides a large space for development and the possibility of new intelligent services, and has no hardware cost, avoiding the defects of various indoor positioning technologies, and is very conducive to promotion.

Currently, smart home appliances are mainly connected by wireless means, including WiFi and Bluetooth, and can be positioned by software; smart phones used to control smart home appliances also support WiFi and Bluetooth, and the hardware platform is unified; when users need to use or control devices, usually The need to use a mobile phone, that is, positioning the phone and positioning the user have the same effect. The client software running on the smartphone can not only form the location capability of the user in a short time, but also locate the location of the user at home by designing the signaling control and algorithm. Many services related to the room can be realized, and Learning and providing accurate positioning ability are the basis for realizing intelligent home services.

The system architecture of the embodiment of the present application is as shown in FIG. 2, and is applicable to the interior of the home; it can be understood that the system can include multiple smart home appliances. As shown in FIG. 3, the control function of the device is implemented by adding a software control module and a control command between the smart terminal and the smart home appliance; the intelligent terminal software also has a built-in positioning algorithm module, and the user is located by calculation. The distance between the room, the device, and the location where the user is located.

The implementation of the positioning function process uses the original intelligent terminal to control the IoT cloud communication channel of the home appliance:

1) The control terminal sends a "beacon transmission command" to enable all devices in the home to send a specific wireless signal for detection by the control terminal, and the home appliance does not need to reply to the confirmation message, and sends a specially coded SSID as a response.

2) The WiFi modules used in existing home appliances support the function of transmitting SSIDs while receiving network messages. When the control completes the measurement of the signal strength of all devices, the “stop beacon command” is sent, and the home appliance software stops sending after receiving it.

3) The terminal control software then calculates a series of intensity values and obtains the location information of the terminal.

Embodiment 1:

Embodiment 1 is a method for performing indoor positioning on a user's smart terminal through a smart home device, which is a general method and can be used for various services related to a user's location, such as automatically identifying a device that the user desires to control, an automatic light switch, and Music automatically follows and other functions.

There are a large number of smart home appliances in the smart home, and currently wireless WiFi, Bluetooth or Zigbee is the main communication method. Figure 4 is a schematic diagram of a family, except that the smart phone (smart user terminal) in the green circle is a mobile client, and the others are smart home appliances, and the use environment is fixed (except for the intelligent sweeping robot). These appliances can form distributed base stations required for indoor positioning under the control of intelligent terminals. By controlling the transmission of necessary signals, the mobile phone can calculate the position of these appliances and locate their position in the home. . The following description is described by WiFi, but the home appliance controlled by Bluetooth can also realize the positioning function.

The positioning function (hereinafter referred to as the "positioning calculation process") needs to be completed by the following steps:

1) First, the intelligent terminal sends a control command to all smart home appliances in the home through the IoT cloud. After receiving the command, the smart home appliance executes the command, enters the wireless beacon transmission state, and sends a special SSID (network name), and the SSID of each device is Different, calculated by the equipment manufacturer, model, and production serial number. The SSID of each device is different, and the device feature value is saved in the device attribute.

2) The positioning software in the terminal (hereinafter referred to as “positioning software” or “APP”) obtains a list of SSID values sent by all devices by reading all device records in the home, and only measures the signal strength of the devices in the home. The method is to scan the WiFi network, measure and record the signal strength of the device to send all the above SSIDs. Because the SSIDs of different devices are different, the positioning software can distinguish different devices, and because the APP knows the SSID of the devices in the home, when the neighbors are also performing positioning and the signals can be received, the APP can filter out the devices in the home.

3) After the measurement is completed (depending on the WiFi signal environment, about 1 to 10 seconds), the terminal sends a "stop SSID command" to each device to all devices, and the device ends the beacon transmission. After the measurement process is completed, the following steps are the position calculation process.

4) The process and functions of positioning calculation include the following

Room Positioning: The positioning software calculates the signal strength of all SSIDs in the home, knows the room in which it is located and the relative position in the room. When the signal strength is greater than the threshold (eg -50dBm), it is initially determined to be the same room equipment. For some businesses that only need to be located in the room, this step can be completed.

Relative positioning: The positioning software sorts all devices according to the strength of the signal as the basis for distance judgment. When it is necessary to judge the distance between the device and the device in the same room, or find the closest device in a certain type of device, the calculation of this step can achieve the purpose.

Precise positioning: The signal strength combination of several devices with the strongest signal is needed, and needs to be compared with the previous records. According to the order and difference of these devices, it is marked as “near XX device” (the device with the strongest signal) "Between the XX and XX devices" (the two signals with the strongest difference between the two devices) and the "between XX, XX and XX devices" (the three devices with the strongest signal are not much different). The initial value of the "not much difference" range is 3dB. After confirming the current position with the user, adjust the position range. When there are three or more devices whose signal strength values are not much different, they are processed by 3 devices.

The location of the precisely positioned area, the user can modify the name that he thinks is reasonable, such as "table position", "beside the computer", etc.

The positioning measurement process is the above steps 1 to 3, involving the software in the user control terminal, the control software in the smart home appliance, and the control terminal sends a control command to all the smart home appliances in the home through the IoT cloud, and the smart home appliance executes the command to make its own wireless. The module sends a specific signal, ie an SSID with independent characteristics, and the terminal wireless module scans the SSID of all devices and records the strength of each signal.

After the measurement of the signal strength is completed, the control terminal re-issues the command to stop all the home appliances from transmitting the wireless signal. The work of the smart home appliance has been completed in the positioning process. The next step is to control the software of the terminal according to the SSID of each device just recorded, corresponding to the name of each device, the position in the home, and the relative distance according to the signal strength. Based on this information, the positioning of itself is completed. The above process is shown in Figure 5.

The positioning calculation function includes three functions, namely, room positioning, relative positioning, and precise positioning. One or more of each can be realized each time according to the accuracy and attribute requirements of the positioning of the service.

Room location: Because the home appliance information already contains their rooms in the home, when the terminal groups the measured signal strengths by room, the current room can be judged by the absolute threshold or relative signal strength. Most of the equipment in a room (such as 2/3 or more) signal signal strength is greater than the threshold, such as -50dBm, while the ratio of equipment in any other room greater than -50dBm is less than 1/3, then it is considered The current terminal is located in this room; the latter can be based on the average of all signal strengths in the room, with the most powerful room as the room in which it is located.

Relative positioning: Some services require finding the device closest to the user. In this case, the device is sorted according to the signal strength, and the device closest to the terminal can be found. When the signal with the strongest device and the second strong device differ by more than a certain value, such as 3dB, which is considered to be closest to a device. If two or more signal strength ratios do not meet this requirement, it may be in the middle of the two devices and the nearest device is not found. If you specify a certain type of equipment, such as an air conditioner, you need to arrange all the air conditioner signals, not all the equipment in the home, you can also find the nearest air conditioner.

Precise positioning: This method is used to calculate the exact position of the user in the home. It is necessary to jointly calculate the signals with the strongest measured values, and determine which device or between several devices, by dividing the area, Calculate the location of the terminal by naming the area.

The schematic diagram of the above positioning calculation is shown in FIG. 6, FIG. 7, and FIG. 8. According to the needs of different energy home intelligent services, the software flexibly selects one of three positioning modes.

The first embodiment described above can bring the following effects:

Realize indoor positioning function in the home at low cost or even no cost, and solve the urgent need for personnel positioning in smart home business

Realize room positioning and realize smart home business related to the room

Realize home intelligence business related to distance to equipment

Realize home intelligence services that require precise positioning

Use with a variety of businesses to achieve home intelligence

Less hardware dependencies, can be quickly commercialized

Compared with the prior art, this embodiment does not need to set a large number of positioning base stations, and has basically zero cost; it is suitable for multi-room and small space characteristics of the home; and has many bit modes, which is suitable for different business needs.

Embodiment 2:

The method of the first embodiment has a defect. The positioning measurement process needs to notify all the home devices. The terminal needs to scan the signals sent by the devices, and the time takes several seconds to ten seconds. For some services that need faster response, the service waits for a longer time. This situation can be improved by the following methods.

Because the home location function is only used inside the home, the home LAN is used at this time, and the terminal connects to the WiFi connection of the router. When performing the positioning of the first embodiment, the terminal simultaneously records the network name (SSID) and signal strength of the home WiFi at this time, and The signal values are averaged to obtain more accurate and stable values. When the positioning function needs to be used later, first determine whether the network changes (still using the same SSID connection), and the signal strength of the router does not change significantly (change is less than 5 dB), then it is judged that the user has not moved greatly, still in the same room (moving to another In a room, the change in the number of walls passing through usually results in a signal strength of more than 10 dB.) The result of the last positioning is still used, and the delay is reduced to 1 second without re-measurement. If the signal strength of the router has changed significantly (greater than 5 dB), it is necessary to re-use the process of Embodiment 1 to relocate.

Based on the first embodiment, the embodiment provides a fast repeat positioning method to improve performance. When judging that the device position has not moved greatly, the last positioning result can be used directly.

Embodiment 3:

Voice control has an important place in the various businesses of smart homes. However, the current voice control has the phenomenon of being unsmart and poorly used. One of the reasons is that when using voice command control, the user usually uses his own perception as a known condition. For example, in the control command, it does not indicate which device is used, but The device that is currently closest or visible to itself is the object of the command, and is simply controlled by commands such as "turning on the light". In this way, for the smart home control system, because the necessary information is lacking, the control command cannot be generated, and the control fails. This situation can be solved by the indoor positioning technology implemented by the method: when the terminal finds that the user's voice control command does not specify the device, and there are multiple devices in the home that can be matched, it is determined whether there is a device in the same room, and if so, The most recent object to be a command operation (when there are multiple devices in the same room that need to be controlled in the same command, if the same room has only one device that can match in the command, no judgment is needed). Otherwise, the original processing method is also used to notify the user that the command execution failed because the "device is not specified".

The third embodiment can determine the environment of the user through the indoor positioning technology, and realize the intelligentization of the voice control.

Embodiment 4:

The wireless modules used by various household electrical appliances have different transmit powers and different antenna performances, which may cause different received signal strengths at the same distance of transmission, so that the control terminal receives different signal strengths, which may affect the judgment of the distance. In order to reduce the influence of this factor, the signal strength compensation value of the device can be preset in the attribute of the device, and the terminal adds the compensation value to each device in the signal strength table, so that all devices measure the signal strength at the same distance. The same, the accuracy of the distance measurement can be improved.

This compensation value is only related to a certain type of device. It only needs to be measured once during the authentication or development and debugging of the device that was originally introduced, and recorded in the device-related attributes of the IoT cloud server. It can compensate for the difference between devices and improve the positioning accuracy. However, the prior art needs to provide measurement reference by using the same type of base station, and does not support different types of devices as the function of the base station.

The embodiments of the present application utilize the existing smart home appliances of the home, and realize the function of positioning users in the home by adding control commands and control protocols, thereby implementing more home smart services. The improvement is:

Using wireless communication circuits of smart home appliances to provide positioning functions of mobile phones or other intelligent terminals in the home

The function is realized by the wireless hardware and control software of the smart home appliance and the software in the mobile phone.

Positioning is achieved by measuring the signal strength emitted by home appliances

Home appliances have room attributes and mobile phones can get

Ability to locate the user's room and user-to-device distance

Get more accurate locations by asking and confirming to users

Recorded position and signal strength for subsequent positioning

User environment awareness, intelligent realization of voice control

In addition, the embodiment of the present application provides a method for indoor positioning as follows:

An indoor positioning method includes:

The first device sends a first signal to the second device in the first area; the first signal is used to trigger the second device to send a beacon signal, where the beacon signal carries the identifier of the second device;

The first device detects a signal strength of a beacon signal sent by the second device;

The first device determines a location of the first device relative to the second device according to a signal strength of the beacon signal and an identifier carried by the beacon signal.

Optionally, the first area includes a plurality of second areas, and the plurality of second devices are located in the multiple second areas;

Determining, by the first device, the location of the first device relative to the second device according to the signal strength of the beacon signal and the identifier carried by the beacon signal, specifically:

Determining, according to the signal strength and the identifier, a second device that is not more than the first distance from the first device, where the first device and the found second device are in the same second region.

Optionally, the determining, by the identifier, the second device that is not more than the first distance from the first device according to the signal strength, and the

Selecting, from the beacon signals respectively sent by the plurality of second devices, a beacon signal having a signal strength greater than a first threshold; and identifying, by the beacon signal having the signal strength greater than the first threshold, a second device characterized by the identifier Determining to be the second device that is not more than the first distance from the first device.

Optionally, the determining, by the first device, the location of the first device relative to the second device according to the signal strength of the beacon signal sent by the second device, specifically:

Determining, according to the signal strength and the identifier, a second device that is closest to the first device, the first device being at or near a location of the second device.

Optionally, the determining, by the signal strength and the identifier, the second device that is closest to the first device, specifically includes:

Selecting, from the beacon signals respectively sent by the plurality of second devices, a beacon signal having the highest signal strength; and determining, by the second device, the identifier represented by the beacon signal having the highest signal strength as the sum The first device is the closest second device.

Determining, according to the signal strength and the identifier, at least two second devices that are closest to the first device, the first device being between the at least two second devices.

Optionally, the determining, by the signal strength and the identifier, the at least two second devices that are closest to the first device, specifically:

Selecting at least two beacon signals (the signal strength is the largest) from the highest to the lowest signal order in the beacon signals respectively transmitted by the plurality of second devices; between the at least two beacon signals The signal strength difference does not exceed the second threshold; the at least two second devices characterized by the identifiers carried by the at least two beacon signals are determined as the at least two second closest to the first device device.

Optionally, the method further includes: determining, by the network to which the first device is connected, and whether the signal strength of the network signal detected by the first device changes, if there is no change, determining that the location of the first device does not occur. Variety.

Optionally, the foregoing method further includes:

Receiving a voice control instruction input by a user;

Determining, by the second device that the voice control instruction matches; the matched second device is configured with a function to be controlled by the voice control instruction;

Determining whether the voice control instruction indicates a second device to be controlled, and if not, determining, in the second device that is matched by the voice control command, a second device that is closest to the first device as the to-be-controlled The second device.

Optionally, in the foregoing method, the first device includes a mobile terminal, and the second device includes a smart home device.

In addition, the embodiment of the present application provides a system for indoor positioning, including a first device and a second device, and the second device may have multiple, and the system may perform the steps described in the method for indoor positioning, and details are not described herein. .

In addition, the embodiment of the present application provides an indoor positioning device, which is the first device described in the indoor positioning method, and may perform the steps as described in the foregoing method; or the device is the indoor positioning method. The second device described can perform the steps as described in the above method.

In addition, the embodiment of the present application provides a storage medium for storing an instruction of the above method for indoor positioning.

In addition, the embodiment of the present application provides a computer program product for performing the above method for indoor positioning.

Those of ordinary skill in the art will appreciate that the elements, rules, and method steps of the various examples described in connection with the embodiments disclosed herein can be implemented in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. The skilled person will use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

It will be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. It will also be understood that the terms "comprise" and "comprises", "the"," One or more other features, integers, steps, operations, elements, components, and/or grouping thereof.

The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. As used in the specification and the appended claims, the s Instructions.

The units described as separate components are or are not physically separated, and the components displayed as units are or are not physical units, ie, located in one place, or distributed to multiple network units. According to actual needs Some or all of the units are selected to achieve the objectives of the embodiments of the present application. The functional units in the various embodiments of the present invention are integrated in one processing unit, and each unit is physically physically present, and two or more units are integrated in one unit.

It is understood by those skilled in the art that all or part of the steps of implementing the above method embodiments are performed by hardware related to the program instructions. The foregoing program is stored in a computer readable storage medium, and when executed, the program includes the above method. The steps of the embodiment; and the foregoing storage medium includes: a medium that stores program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

An indoor positioning method, comprising:

The first device sends a first signal to the second device in the first area; the first signal is used to trigger the second device to send a beacon signal, where the beacon signal carries the identifier of the second device;

The first device detects a signal strength of a beacon signal sent by the second device;

The first device determines a location of the first device relative to the second device according to a signal strength of the beacon signal and an identifier carried by the beacon signal.
The indoor positioning method according to claim 1, wherein the first area comprises a plurality of second areas, and the plurality of second devices are located in the plurality of second areas;

Determining, by the first device, the location of the first device relative to the second device according to the signal strength of the beacon signal and the identifier carried by the beacon signal, specifically:

Determining, according to the signal strength and the identifier, a second device that is not more than the first distance from the first device, where the first device and the found second device are in the same second region.
The indoor positioning method according to claim 2, wherein the determining, by the signal strength and the identifier, the second device that is not more than the first distance from the first device comprises:

Selecting, from the beacon signals respectively sent by the plurality of second devices, a beacon signal having a signal strength greater than a first threshold; and identifying, by the beacon signal having the signal strength greater than the first threshold, a second device characterized by the identifier Determining to be the second device that is not more than the first distance from the first device.
The indoor positioning method according to any one of claims 1 to 3, wherein the first device determines, according to a signal strength of a beacon signal sent by the second device, the first device relative to the The location of the second device specifically includes:

Determining, according to the signal strength and the identifier, a second device that is closest to the first device, the first device being at or near a location of the second device.
The indoor positioning method according to claim 4, wherein the determining, by the signal strength and the identifier, the second device that is closest to the first device, specifically includes:

Selecting, from the beacon signals respectively sent by the plurality of second devices, a beacon signal having the highest signal strength; and determining, by the second device, the identifier represented by the beacon signal having the highest signal strength as the sum The first device is the closest second device.
The indoor positioning method according to any one of claims 1 to 3, wherein the first device determines, according to a signal strength of a beacon signal sent by the second device, the first device relative to the The location of the second device specifically includes:

Determining, according to the signal strength and the identifier, at least two second devices that are closest to the first device, the first device being between the at least two second devices.
The indoor positioning method according to claim 6, wherein the determining, according to the signal strength and the identifier, the at least two second devices that are closest to the first device, specifically:

Selecting at least two beacon signals (the signal strength is the largest) from the highest to the lowest signal order in the beacon signals respectively transmitted by the plurality of second devices; between the at least two beacon signals The difference in signal strength does not exceed the second threshold; determining at least two second devices characterized by the identifiers carried by the at least two beacon signals as the sum The first device is located at least 2 second devices that are closest to each other.
The indoor positioning method according to any one of claims 1 to 7, further comprising: determining whether a network connected to the first device and a signal strength of a network signal detected by the first device occur Change, if there is no change, it is determined that the position of the first device has not changed.
The indoor positioning method according to any one of claims 1 to 8, further comprising:

Receiving a voice control instruction input by a user;

Determining, by the second device that the voice control instruction matches; the matched second device is configured with a function to be controlled by the voice control instruction;

Determining whether the voice control instruction indicates a second device to be controlled, and if not, determining, in the second device that is matched by the voice control command, a second device that is closest to the first device as the to-be-controlled The second device.
The indoor positioning method according to any one of claims 1 to 9, wherein the first device is a mobile terminal, and the second device is a smart home device.
An indoor positioning device, comprising:

The indoor positioning device sends a first signal to the second device in the first area; the first signal is used to trigger the second device to send a beacon signal, where the beacon signal carries the identifier of the second device;

The indoor positioning device detects a signal strength of a beacon signal sent by the second device;

The indoor positioning device determines a position of the indoor positioning device relative to the second device according to a signal strength of the beacon signal and an identifier carried by the beacon signal.
The indoor positioning device according to claim 11, wherein the first area comprises a plurality of second areas, and the plurality of second devices are located in the plurality of second areas;

Determining, by the indoor positioning device, the location of the indoor positioning device relative to the second device according to the signal strength of the beacon signal and the identifier carried by the beacon signal, specifically:

And determining, according to the signal strength and the identifier, a second device that is not more than the first distance from the indoor positioning device, where the indoor positioning device and the found second device are in the same second region.
The indoor positioning device according to claim 12, wherein the determining, by the signal strength and the identifier, the second device that is not more than the first distance from the indoor positioning device comprises:

Selecting, from the beacon signals respectively sent by the plurality of second devices, a beacon signal having a signal strength greater than a first threshold; and identifying, by the beacon signal having the signal strength greater than the first threshold, a second device characterized by the identifier Determining to be the second device that is not more than the first distance from the indoor positioning device.
The indoor positioning device according to any one of claims 11 to 13, wherein the indoor positioning device determines, according to a signal strength of a beacon signal sent by the second device, the indoor positioning device relative to the The location of the second device specifically includes:

Determining, according to the signal strength and the identifier, a second device that is closest to the indoor positioning device, where the indoor positioning device is at or near the location of the second device.
The indoor positioning device according to claim 14, wherein the determining, by the signal strength and the identifier, the second device that is closest to the indoor positioning device comprises:

Selecting, from the beacon signals respectively sent by the plurality of second devices, a beacon signal having the highest signal strength; The second device characterized by the identifier carried by the beacon signal having the highest signal strength is determined as the second device that is closest to the indoor positioning device.
The indoor positioning device according to any one of claims 11 to 13, wherein the indoor positioning device determines, according to a signal strength of a beacon signal sent by the second device, the indoor positioning device relative to the The location of the second device specifically includes:

Determining, according to the signal strength and the identifier, at least two second devices that are closest to the indoor positioning device, the indoor positioning device being between the at least two second devices.
The indoor positioning device according to claim 16, wherein the determining, according to the signal strength and the identifier, the at least two second devices that are closest to the indoor positioning device, specifically:

Selecting at least two beacon signals (the signal strength is the largest) from the highest to the lowest signal order in the beacon signals respectively transmitted by the plurality of second devices; between the at least two beacon signals The signal strength difference does not exceed the second threshold; the at least two second devices that are characterized by the identifiers carried by the at least two beacon signals are determined to be at least two second closest to the indoor positioning device. device.
The indoor positioning device according to any one of claims 11-17, further comprising: determining whether a network connected to the indoor positioning device and a signal strength of a network signal detected by the indoor positioning device occur Change, if there is no change, then determine that the location of the indoor positioning device has not changed.
The indoor positioning device according to any one of claims 11 to 18, further comprising:

Receiving a voice control instruction input by a user;

Determining, by the second device that the voice control instruction matches; the matched second device is configured with a function to be controlled by the voice control instruction;

Determining whether the voice control instruction indicates a second device to be controlled, and if not, determining, in the second device that matches the voice control command, a second device that is closest to the indoor positioning device as the to-be-controlled The second device.
The indoor positioning device according to any one of claims 11 to 19, wherein the indoor positioning device is a mobile terminal, and the second device is a smart home device.