CN116634355A - Positioning method and device of mobile terminal, electronic equipment and storage medium - Google Patents

Positioning method and device of mobile terminal, electronic equipment and storage medium Download PDF

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Publication number
CN116634355A
CN116634355A CN202310560953.2A CN202310560953A CN116634355A CN 116634355 A CN116634355 A CN 116634355A CN 202310560953 A CN202310560953 A CN 202310560953A CN 116634355 A CN116634355 A CN 116634355A
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CN
China
Prior art keywords
mobile terminal
access point
wireless access
signal
distance
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Pending
Application number
CN202310560953.2A
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Chinese (zh)
Inventor
陈亚文
朱正和
向万
吕雪
赵稼轩
路兆铭
李美玲
景文鹏
温向明
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Beijing University of Posts and Telecommunications
Taiyuan University of Science and Technology
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Beijing University of Posts and Telecommunications
Taiyuan University of Science and Technology
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Application filed by Beijing University of Posts and Telecommunications, Taiyuan University of Science and Technology filed Critical Beijing University of Posts and Telecommunications
Priority to CN202310560953.2A priority Critical patent/CN116634355A/en
Publication of CN116634355A publication Critical patent/CN116634355A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application provides a positioning method, a positioning device, electronic equipment and a storage medium of a mobile terminal, wherein the method comprises the steps of responding to a network access request received by the mobile terminal, acquiring a distribution diagram of wireless access point equipment and a first signal which is received by the mobile terminal and sent by at least one wireless access point equipment; based on at least one first signal, carrying out first region division on the distribution map so as to determine a target region where the mobile terminal is located; responsive to detecting the change in the at least one first signal, re-acquiring a second signal received by the mobile terminal and transmitted by the at least one wireless access point device; and based on at least one second signal, carrying out second region division on the target region so as to determine the target position of the mobile terminal, solving the technical problem of low accuracy of positioning the mobile terminal by using wireless access point equipment with the same service set identifier in the prior art, and achieving the purpose of accurately positioning the mobile terminal.

Description

Positioning method and device of mobile terminal, electronic equipment and storage medium
Technical Field
The present application relates to the field of data processing technologies, and in particular, to a method and apparatus for positioning a mobile terminal, an electronic device, and a storage medium.
Background
The accurate positioning of the mobile terminal is necessary in the building, and with the continuous development of wireless network technology, the wireless local area network is more and more widely applied, and the mobile terminal can be accurately positioned by utilizing the wireless access point equipment.
In the prior art, wireless access point devices deployed in a building are usually named respectively, signals sent by each wireless access point device can interfere with and overlap with signals of other wireless access point devices to form a fingerprint library composed of signal patterns similar to fingerprints, and the position of a mobile terminal can be obtained by matching the currently received signals with the fingerprint library. In practice, however, some relatively complex buildings such as malls, schools, etc. often provide service sets identifying the same wireless access point devices for user connection. The method in the prior art is applied to the situation that the mobile terminal is positioned by using the wireless access point equipment with the same service set identifier, and the mobile terminal position is difficult to accurately position, because the service set identifier of the wireless access point has the same situation, and the signal from which wireless access point equipment can not be accurately distinguished, so that the positioning error of the mobile terminal is larger.
Disclosure of Invention
In view of the above, the present application is directed to a positioning method, a positioning device, an electronic device and a storage medium for a mobile terminal, so as to overcome all or part of the drawbacks of the prior art.
Based on the above object, the present application provides a positioning method of a mobile terminal, which is applied to a positioning system, wherein the positioning system includes a mobile terminal and a plurality of wireless access point devices, and the wireless access point devices provide wireless network connection services for the mobile terminal, and the method includes: acquiring a distribution diagram of wireless access point equipment and a first signal which is currently received by the mobile terminal and sent by at least one wireless access point equipment in response to receiving a network access request of the mobile terminal; based on at least one first signal, carrying out first region division on the distribution map so as to determine a target region where the mobile terminal is located; responsive to detecting the change in the at least one first signal, re-acquiring a second signal received by the mobile terminal and transmitted by the at least one wireless access point device; and carrying out second region division on the target region based on at least one second signal so as to determine the target position of the mobile terminal.
Optionally, before receiving the network access request of the mobile terminal, the method includes: the transmission channels of the plurality of wireless access point devices are deployed so that the transmission channels between adjacent wireless access point devices and the mobile terminal are different.
Optionally, the first area division of the distribution map based on at least one first signal to determine a target area where the mobile terminal is located includes: calculating a first distance between wireless access point equipment corresponding to the first signal and the mobile terminal based on the strength indication value of the first signal; correcting the first distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device; taking the wireless access point equipment corresponding to each first signal as a sphere center, and taking the corrected first distance corresponding to the wireless access point equipment as a radius to obtain a first sphere; a plurality of first spherically intersecting regions is determined as the target region.
Optionally, the calculating, based on the strength indication value of the first signal, a first distance between the wireless access point device corresponding to the first signal and the mobile terminal includes: each first distance is calculated by the following formula: Wherein P is r1 For the strength indication value of the first signal, P t1 G for the first transmit power of the wireless access point device t1 G for a first transmission gain of the wireless access point device r1 For the first receiving gain of the mobile terminal, h t1 A first height, h, of the wireless access point device from a preset plane r1 D, a first height from a preset plane for the mobile terminal z1 For the first distance d 1 For a first initial distance, +.>And the noise variance corresponding to the wireless access point equipment after the first area is divided.
Optionally, the second area division is performed on the target area based on at least one second signal to determine a target position where the mobile terminal is located, including: calculating a second distance between the wireless access point equipment corresponding to the second signal and the mobile terminal based on the strength indication value of the second signal; correcting the second distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device; taking the wireless access point equipment corresponding to each second signal as a sphere center, and taking the corrected second distance corresponding to the wireless access point equipment as a radius to obtain a second sphere; and determining the center point of the intersected areas of the second spheres as the target position of the mobile terminal.
Optionally, the wireless access point device and the wireless access point device corresponding to the second signal are calculated based on the strength indication value of the second signalThe second distance between the mobile terminals includes: each second distance is calculated by the following formula:wherein P is r2 For the strength indication value of the second signal, P t2 G for a second transmit power of the wireless access point device t2 G for a second transmission gain of the wireless access point device r2 For a second receiving gain of the mobile terminal, h t2 A second height, h, from a preset plane for the wireless access point device r2 D, a second height from a preset plane for the mobile terminal z2 For the second distance d 2 For a second initial distance, +>And the noise variance corresponding to the wireless access point equipment after the second area is divided.
Optionally, the method further comprises: periodically acquiring a plurality of target positions, and determining a fitting curve based on the plurality of target positions; determining an average movement rate of the mobile terminal based on the plurality of target locations; and determining the target position of the mobile terminal in the next period based on the fitted curve and the average moving speed.
Based on the same inventive concept, the application also provides a positioning device of a mobile terminal, which is applied to a positioning system, wherein the positioning system comprises the mobile terminal and a plurality of wireless access point devices, and the wireless access point devices provide wireless network connection service for the mobile terminal and comprise: a first acquisition module configured to acquire a distribution diagram of a wireless access point device and a first signal currently received by the mobile terminal and transmitted by at least one wireless access point device in response to receiving a network access request of the mobile terminal; the first area dividing module is configured to perform first area division on the distribution diagram based on at least one first signal so as to determine a target area where the mobile terminal is located; a second acquisition module configured to re-acquire a second signal received by the mobile terminal and transmitted by at least one wireless access point device in response to detecting that at least one first signal has changed; and the second area dividing module is configured to perform second area division on the target area based on at least one second signal so as to determine the target position of the mobile terminal.
Based on the same inventive concept, the application also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable by the processor, the processor implementing the method as described above when executing the computer program.
Based on the same inventive concept, the present application also provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method as described above.
From the foregoing, it can be seen that the positioning method, apparatus, electronic device and storage medium for a mobile terminal according to the present application acquire, in response to receiving a network access request from the mobile terminal, a distribution diagram of a wireless access point device and a first signal currently received by the mobile terminal and sent by at least one wireless access point device. Based on at least one first signal, the distribution map is subjected to first region division so as to determine a target region where the mobile terminal is located, the purpose of initially determining the region where the mobile terminal is located is achieved, computing resources and computing time are saved, and user satisfaction is improved. And in response to detecting the change of at least one first signal, re-acquiring a second signal received by the mobile terminal and sent by at least one wireless access point device, and establishing a basis for realizing accurate positioning of the mobile terminal through the second signal. And based on at least one second signal, carrying out second region division on the target region so as to determine the target position of the mobile terminal, thereby saving computing resources and realizing the purpose of accurately positioning the mobile terminal.
Drawings
In order to more clearly illustrate the technical solutions of the present application or related art, the drawings that are required to be used in the description of the embodiments or related art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort to those of ordinary skill in the art.
Fig. 1 is a flow chart of a positioning method of a mobile terminal according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a positioning device of a mobile terminal according to an embodiment of the present application;
fig. 3 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the application.
Detailed Description
The present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used in embodiments of the present application, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
As described in the background section, GPS does not provide accurate positioning of a mobile terminal within a building, but it is necessary to accurately position the mobile terminal, and an indoor navigation service is exemplified to require accurate positioning of the mobile terminal. With the continuous development of wireless network technology, wireless local area networks are increasingly used. In relatively complex buildings such as large malls, stadiums, airports, etc., it is desirable to provide stable, high-speed wireless network coverage to meet the networking needs of people. Thus, the mobile terminal can be accurately positioned by the wireless access point device.
In the prior art, wireless access point devices are generally named respectively, mutual interference and overlapping of the wireless access point devices are utilized to form a fingerprint library composed of signal patterns similar to fingerprints, and the position of a mobile terminal can be obtained by comparing a currently received signal with the fingerprint library. However, when the above method is applied to a case of locating a mobile terminal using wireless access point devices having the same service set identifier, it is difficult to locate the mobile terminal accurately, because the service set identifier of the wireless access point is the same, and it is not possible to accurately distinguish from which wireless access point device the signal originates, resulting in a large location error for the mobile terminal. In addition, the establishment of the fingerprint library needs to collect a certain number of data samples at each position, and the more the number of samples and the more the positions are, the more difficult and the workload of the establishment of the fingerprint library is. This not only requires a lot of time and human resources, but also the established fingerprint library needs to be updated and maintained continuously to adapt to the changes of different users and environments.
In view of this, an embodiment of the present application proposes a positioning method of a mobile terminal, and referring to fig. 1, the positioning system is applied to a positioning system, where the positioning system includes a mobile terminal and a plurality of wireless access point devices, where the wireless access point devices provide wireless network connection services for the mobile terminal, and the method includes the following steps:
step 101, in response to receiving a network access request of the mobile terminal, acquiring a distribution diagram of wireless access point equipment and a first signal currently received by the mobile terminal and sent by at least one wireless access point equipment.
In this step, a plurality of wireless access point devices are deployed within a building, wherein the building is a relatively large-area building, such as a stadium, airport station, convention center, mall, school, or the like. Because the area of a building is relatively large, it is difficult for signals of a wired network to cover the entire building, and thus a plurality of wireless access point devices are connected to the wired network to provide wireless network connection services for mobile terminals located within the building. In addition, when the mobile terminal moves, the mobile terminal may move out of the signal coverage range of the wireless access point device connected with the mobile terminal, and network connection with the next wireless access point device needs to be performed again, so that experience of a user is reduced. In order to solve the above problem, a plurality of wireless access point devices are set with the same service set identifier, because signals generated by the wireless access point devices with the same service set identifier can be superimposed, the superposition of the plurality of signals is equivalent to prolonging the propagation range of signals of the wireless access point devices connected with the mobile terminal. When the mobile terminal moves in position, the received signal strength of the currently connected wireless access point device is weakened, a signal with stronger strength sent by the next wireless access point device can be automatically received, wherein the currently connected wireless access point device and the next connected wireless access point device have the same service set identifier, the situation that the signal cannot be received due to the movement of the mobile terminal is avoided, and the experience of a user is improved.
The mobile terminal is a terminal which needs to acquire network service in a building, and can be a mobile phone of a user when the user needs indoor navigation; when the merchant starts the robot meal delivery service, the mobile terminal may be a robot. When a network access request of a mobile terminal is received, a first signal sent by wireless access point equipment in an area where the mobile terminal is located and a distribution diagram of the wireless access point equipment are obtained, wherein the network access request is a wireless network connection request sent by the mobile terminal to the wireless access point equipment, and the distribution diagram of the wireless access point equipment is a three-dimensional image of a building marked with the wireless access point equipment.
Step 102, based on at least one first signal, performing first region division on the distribution map to determine a target region where the mobile terminal is located.
In this step, in order to accurately determine the position of the mobile terminal within the building, it is necessary to establish a three-dimensional coordinate system of the building based on the profile. Because the building area is relatively large, if the three-dimensional coordinate system of the distribution diagram is established relatively accurately, the calculation amount is large, the calculation load is caused, the required calculation time is long, and the area where the mobile terminal is located cannot be rapidly determined, so that the satisfaction degree of the user is reduced. Therefore, according to at least one signal received by the mobile terminal, the mobile terminal is judged to be in the wireless network coverage range of the building, and then the first area division is carried out on the division. The first region division is divided into divisions with relatively large division ranges, and the divisions are relatively inaccurate, and the first region division may divide the distribution map into a plurality of square lattices with sides between 5 and 8 meters, for example. According to the first signal received by the wireless access terminal, the target area where the mobile terminal is located can be judged, the purpose of preliminarily determining the area where the mobile terminal is located in a building is achieved, computing resources and computing time are saved, and user satisfaction is improved.
And step 103, in response to detecting that at least one first signal is changed, re-acquiring a second signal received by the mobile terminal and sent by at least one wireless access point device.
In this step, the change of the first signal indicates that the mobile terminal may move, so that the signal strength of at least one first signal received by the mobile terminal is weakened along with the movement of the mobile terminal, and the mobile terminal cannot receive the first signal, so that the second signal which can be received by the mobile terminal currently needs to be acquired again, and a foundation is established for realizing accurate positioning of the mobile terminal through the second signal.
And 104, performing second area division on the target area based on at least one second signal to determine the target position of the mobile terminal.
In this step, the mobile terminal moves in the target area, and the moved position of the mobile terminal needs to be determined in the target area. The target area is relatively small compared with the whole distribution diagram, so that the target area needs to be divided relatively accurately to determine the accurate position of the mobile terminal after movement. Moreover, even if the target area is divided into areas relatively accurately, excessive computing resources are not consumed due to the fact that the area of the target area is relatively small. And on the basis that the three-dimensional coordinate system is established in the target area, carrying out second area division on the target area, thereby achieving the purpose of carrying out further detailed division on the three-dimensional coordinate system. The second region is divided into a relatively small division range, and the division is relatively accurate, and by way of example, the second region can be finely divided into a plurality of square lattices with side lengths of 0.5-1 m on the basis of a three-dimensional coordinate system established by the target region. The position of the mobile terminal can be accurately determined by relatively finely dividing the target area, so that the computing resource is saved, and the purpose of accurately positioning the mobile terminal is realized.
By the scheme, the distribution diagram of the wireless access point equipment and the first signal which is currently received by the mobile terminal and sent by at least one wireless access point equipment are obtained in response to receiving the network access request of the mobile terminal. Based on at least one first signal, the distribution map is subjected to first region division so as to determine a target region where the mobile terminal is located, the purpose of initially determining the region where the mobile terminal is located is achieved, computing resources and computing time are saved, and user satisfaction is improved. And in response to detecting the change of at least one first signal, re-acquiring a second signal received by the mobile terminal and sent by at least one wireless access point device, and establishing a basis for realizing accurate positioning of the mobile terminal through the second signal. And based on at least one second signal, carrying out second region division on the target region so as to determine the target position of the mobile terminal, thereby saving computing resources and realizing the purpose of accurately positioning the mobile terminal.
In some embodiments, before receiving the network access request of the mobile terminal, the method includes: the transmission channels of the plurality of wireless access point devices are deployed so that the transmission channels between adjacent wireless access point devices and the mobile terminal are different.
In this embodiment, there is a signal overlapping area between two adjacent wireless access point devices, so that signal channels used in the signal overlapping area need to be ensured not to overlap each other, otherwise, signals between the wireless access point devices are easily interfered with each other, thereby reducing the overall performance of the wireless network. In order to solve the above problems, different transmission channels are deployed on adjacent wireless access point devices, and signals are isolated by the different transmission channels, so that the problem of signal interference of the adjacent wireless access point devices is solved, and the performance of a wireless network is ensured.
In some embodiments, the first area division of the distribution map based on at least one first signal to determine a target area where the mobile terminal is located includes: calculating a first distance between wireless access point equipment corresponding to the first signal and the mobile terminal based on the strength indication value of the first signal; correcting the first distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device; taking the wireless access point equipment corresponding to each first signal as a sphere center, and taking the corrected first distance corresponding to the wireless access point equipment as a radius to obtain a first sphere; a plurality of first spherically intersecting regions is determined as the target region.
In this embodiment, the mobile terminal may receive the strength indication value of the first signal sent by the wireless access point device, and it should be noted that, when the mobile terminal receives strength indication values corresponding to a plurality of first signals, the strength indication value corresponding to the first signal that meets the preset condition is determined and used to calculate the first distance. The strength indication value corresponding to the first signal is screened by setting a preset condition, so that the area where the mobile terminal is located can be determined, the calculated amount can be reduced, and the preset condition can be that the strength indication value corresponding to the first signal is the first four values after being sorted from big to small. Because the wireless access point device has a certain volume in an actual scene, the installation direction and the downward inclination angle of the building exist, and the installation direction and the downward inclination angle of the wireless access point device are often ignored in the distribution diagram, so that the first distance calculated through the distribution diagram is inaccurate, and the first distance needs to be corrected according to the installation direction and the downward inclination angle of the wireless access point device. The mobile terminal can receive the first signal transmitted by the wireless access point device, so the mobile terminal must be in the vicinity of the wireless access point device. The wireless access point equipment corresponding to the first signal is taken as a sphere center, the corrected first distance is taken as a radius, a sphere is obtained, and a plurality of spherical intersecting areas are areas where the mobile terminal possibly exists, namely target areas, so that the purpose of accurately determining the target areas where the mobile terminal is located is achieved.
In some embodiments, the calculating, based on the strength indication value of the first signal, a first distance between the wireless access point device corresponding to the first signal and the mobile terminal includes: each first distance is calculated by the following formula:wherein P is r1 For the strength indication value of the first signal, P t1 G for the first transmit power of the wireless access point device t1 G for a first transmission gain of the wireless access point device r1 For the first receiving gain of the mobile terminal, h t1 A first height, h, of the wireless access point device from a preset plane r1 D, a first height from a preset plane for the mobile terminal z1 For the first distance d 1 For a first initial distance, +.>And the noise variance corresponding to the wireless access point equipment after the first area is divided.
In this embodiment, the first distance is calculated by a formula, where the strength indication value, the first transmission power, the first transmission gain, and the first reception gain of the first signal are actually read values; the first height of the wireless access point equipment from the preset plane is the actual installation height of the wireless access point equipment in the building, which is obtained in advance; the first height of the mobile terminal from the preset plane can be flexibly set according to an actual scene, and can be set to be 1 meter in an exemplary manner; different region divisions correspond to different noise variances, and matching noise variances are found according to the region divisions. Under the condition that the numerical value is inaccurate, the calculated first initial distance is also inaccurate, so that the first initial distance is also required to be corrected by utilizing the noise variance corresponding to the wireless access point equipment after the first area division, and the accuracy of the calculated first distance is ensured.
In some embodiments, the second area dividing the target area based on at least one second signal to determine a target location where the mobile terminal is located includes: calculating a second distance between the wireless access point equipment corresponding to the second signal and the mobile terminal based on the strength indication value of the second signal; correcting the second distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device; taking the wireless access point equipment corresponding to each second signal as a sphere center, and taking the corrected second distance corresponding to the wireless access point equipment as a radius to obtain a second sphere; and determining the center point of the intersected areas of the second spheres as the target position of the mobile terminal.
In this embodiment, the mobile terminal may receive the strength indication value of the second signal sent by the wireless access point device, and it should be noted that, when the mobile terminal receives strength indication values corresponding to a plurality of second signals, the strength indication value corresponding to the second signal that meets the preset condition is determined and used to calculate the second distance. The strength indication value corresponding to the second signal is screened by setting a preset condition, so that the area where the mobile terminal is located can be determined, the calculated amount can be reduced, and the preset condition can be that the strength indication value corresponding to the second signal is the first four values after being sorted from big to small. Because the wireless access point device has a certain volume in the actual scene, the installation direction and the downward inclination angle of the building exist, and the installation direction and the downward inclination angle of the wireless access point device are often ignored in the distribution diagram, so that the second distance calculated through the distribution diagram is inaccurate, and the second distance needs to be corrected according to the installation direction and the downward inclination angle of the wireless access point device. The mobile terminal can receive the second signal transmitted by the wireless access point device, so the mobile terminal must be in the vicinity of the wireless access point device. And the wireless access point equipment corresponding to the second signal is taken as a sphere center, the corrected second distance is taken as a radius, a sphere is obtained, and the central points of a plurality of spherical intersection areas are determined as the target positions of the mobile terminal, so that the aim of accurately determining the target positions of the mobile terminal is fulfilled.
In some embodiments, the calculating, based on the strength indication value of the second signal, a second distance between the wireless access point device corresponding to the second signal and the mobile terminal includes: each second distance is calculated by the following formula:wherein P is r2 For the strength indication value of the second signal, P t2 G for a second transmit power of the wireless access point device t2 G for a second transmission gain of the wireless access point device r2 For a second receiving gain of the mobile terminal, h t2 A second height, h, from a preset plane for the wireless access point device r2 D, a second height from a preset plane for the mobile terminal z2 For the second distance d 2 For a second initial distance, +>And the noise variance corresponding to the wireless access point equipment after the second area is divided.
In this embodiment, the second distance is calculated by a formula, where the strength indication value of the second signal, the second transmission power, the second transmission gain, and the second reception gain are actually read values; the second height of the wireless access point equipment from the preset plane is the actual installation height of the wireless access point equipment in the building, which is obtained in advance; the second height of the mobile terminal from the preset plane can be flexibly set according to an actual scene, and can be set to be 1 meter in an exemplary manner; different region divisions correspond to different noise variances, and matching noise variances are found according to the region divisions. Under the condition that the numerical value is inaccurate, the calculated second initial distance is also inaccurate, so that the second initial distance needs to be corrected by utilizing the noise variance corresponding to the wireless access point equipment after the second area division, and the accuracy of the calculated second distance is ensured.
In some embodiments, the method further comprises: periodically acquiring a plurality of target positions, and determining a fitting curve based on the plurality of target positions; determining an average movement rate of the mobile terminal based on the plurality of target locations; and determining the target position of the mobile terminal in the next period based on the fitted curve and the average moving speed.
In this embodiment, in the actual application scenario, the signal strength of the wireless access point device is not refreshed in real time by the mobile terminal due to the power consumption constraint of the bottom layer of the mobile terminal, and the signal strength is obtained once every preset time, which may be 30 seconds, for example. It is assumed that after the next period starts, the mobile terminal is still in a moving state, but the next target position is not received at this time, so that the actual movement of the mobile terminal does not correspond to the previous target position, and the experience of the user is degraded. To avoid this, it is necessary to predict the target position of the mobile terminal in the next cycle. Based on a plurality of target locations, a fitted curve is determined, which is a curve with relatively small error, drawn by discrete points, and exemplary methods for determining the fitted curve may be least squares, polynomial fitting, gaussian fitting, and the like. And calculating the average moving speed of the mobile terminal according to the acquired target position in the period, and determining the moving distance of the mobile terminal according to the time point and the average moving speed of the mobile terminal in the next period. The moving distance of the mobile terminal is input into the fitting curve, the target position of the mobile terminal in the next period can be determined, the purpose of predictive positioning of the mobile terminal is achieved, and the experience of a user is improved.
It should be noted that, the method of the embodiment of the present application may be performed by a single device, for example, a computer or a server. The method of the embodiment can also be applied to a distributed scene, and is completed by mutually matching a plurality of devices. In the case of such a distributed scenario, one of the devices may perform only one or more steps of the method of an embodiment of the present application, the devices interacting with each other to accomplish the method.
It should be noted that the foregoing describes some embodiments of the present application. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
Based on the same inventive concept, the application also provides a positioning device of the mobile terminal, which corresponds to the method of any embodiment.
Referring to fig. 2, the positioning device of the mobile terminal is applied to a positioning system, the positioning system includes a mobile terminal and a plurality of wireless access point devices, the wireless access point devices provide wireless network connection services for the mobile terminal, and the positioning device includes:
a first obtaining module 10, configured to obtain, in response to receiving a network access request of the mobile terminal, a distribution diagram of a wireless access point device and a first signal currently received by the mobile terminal and sent by at least one wireless access point device.
The first area dividing module 20 is configured to perform first area division on the distribution diagram based on at least one first signal, so as to determine a target area where the mobile terminal is located.
A second acquisition module 30 configured to re-acquire the second signal received by the mobile terminal and transmitted by the at least one wireless access point device in response to detecting that the at least one first signal has changed.
The second area dividing module 40 is configured to perform second area division on the target area based on at least one second signal, so as to determine a target position where the mobile terminal is located.
By the device, the distribution diagram of the wireless access point equipment and the first signal which is currently received by the mobile terminal and sent by at least one wireless access point equipment are obtained in response to receiving the network access request of the mobile terminal. Based on at least one first signal, the distribution map is subjected to first region division so as to determine a target region where the mobile terminal is located, the purpose of initially determining the region where the mobile terminal is located is achieved, computing resources and computing time are saved, and user satisfaction is improved. And in response to detecting the change of at least one first signal, re-acquiring a second signal received by the mobile terminal and sent by at least one wireless access point device, and establishing a basis for realizing accurate positioning of the mobile terminal through the second signal. And based on at least one second signal, carrying out second region division on the target region so as to determine the target position of the mobile terminal, thereby saving computing resources and realizing the purpose of accurately positioning the mobile terminal.
In some embodiments, the method further comprises deploying, prior to receiving the network access request of the mobile terminal, transmission channels of a plurality of wireless access point devices such that transmission channels between neighboring wireless access point devices and the mobile terminal are different.
In some embodiments, the first area dividing module 20 is further configured to calculate, based on the strength indication value of the first signal, a first distance between the wireless access point device corresponding to the first signal and the mobile terminal; correcting the first distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device; taking the wireless access point equipment corresponding to each first signal as a sphere center, and taking the corrected first distance corresponding to the wireless access point equipment as a radius to obtain a first sphere; a plurality of first spherically intersecting regions is determined as the target region.
In some embodiments, the first region dividing module 20 is further configured to calculate each first region by the following formula respectivelyDistance:wherein P is r1 For the strength indication value of the first signal, P t1 G for the first transmit power of the wireless access point device t1 G for a first transmission gain of the wireless access point device r1 For the first receiving gain of the mobile terminal, h t1 A first height, h, of the wireless access point device from a preset plane r1 D, a first height from a preset plane for the mobile terminal z1 For the first distance d 1 For the first initial distance to be a first,and the noise variance corresponding to the wireless access point equipment after the first area is divided.
In some embodiments, the second area dividing module 40 is further configured to calculate, based on the strength indication value of the second signal, a second distance between the wireless access point device corresponding to the second signal and the mobile terminal; correcting the second distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device; taking the wireless access point equipment corresponding to each second signal as a sphere center, and taking the corrected second distance corresponding to the wireless access point equipment as a radius to obtain a second sphere; and determining the center point of the intersected areas of the second spheres as the target position of the mobile terminal.
In some embodiments, the second region dividing module 40 is further configured to calculate each second distance by the following formula: Wherein P is r2 For the strength indication value of the second signal, P t2 G for a second transmit power of the wireless access point device t2 G for a second transmission gain of the wireless access point device r2 For a second receiving gain of the mobile terminal, h t2 A preset plane for the distance between the wireless access point equipment and the preset planeSecond height, h r2 D, a second height from a preset plane for the mobile terminal z2 For the second distance d 2 For the second initial distance to be a second,and the noise variance corresponding to the wireless access point equipment after the second area is divided.
In some embodiments, the apparatus further comprises a determination module further configured to periodically acquire a plurality of target locations and to determine a fitted curve based on the plurality of target locations; determining an average movement rate of the mobile terminal based on the plurality of target locations; and determining the target position of the mobile terminal in the next period based on the fitted curve and the average moving speed.
For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, the functions of each module may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.
The device of the foregoing embodiment is used to implement the positioning method of the corresponding mobile terminal in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.
Based on the same inventive concept, the application also provides an electronic device corresponding to the method of any embodiment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the positioning method of the mobile terminal of any embodiment when executing the program.
Fig. 3 shows a more specific hardware architecture of an electronic device according to this embodiment, where the device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 implement communication connections therebetween within the device via a bus 1050.
The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit ), microprocessor, application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, etc. for executing relevant programs to implement the technical solutions provided in the embodiments of the present disclosure.
The Memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory ), static storage device, dynamic storage device, or the like. Memory 1020 may store an operating system and other application programs, and when the embodiments of the present specification are implemented in software or firmware, the associated program code is stored in memory 1020 and executed by processor 1010.
The input/output interface 1030 is used to connect with an input/output module for inputting and outputting information. The input/output module may be configured as a component in a device (not shown in the figure) or may be external to the device to provide corresponding functionality. Wherein the input devices may include a keyboard, mouse, touch screen, microphone, various types of sensors, etc., and the output devices may include a display, speaker, vibrator, indicator lights, etc.
Communication interface 1040 is used to connect communication modules (not shown) to enable communication interactions of the present device with other devices. The communication module may implement communication through a wired manner (such as USB, network cable, etc.), or may implement communication through a wireless manner (such as mobile network, WIFI, bluetooth, etc.).
Bus 1050 includes a path for transferring information between components of the device (e.g., processor 1010, memory 1020, input/output interface 1030, and communication interface 1040).
It should be noted that although the above-described device only shows processor 1010, memory 1020, input/output interface 1030, communication interface 1040, and bus 1050, in an implementation, the device may include other components necessary to achieve proper operation. Furthermore, it will be understood by those skilled in the art that the above-described apparatus may include only the components necessary to implement the embodiments of the present description, and not all the components shown in the drawings.
The electronic device of the foregoing embodiment is configured to implement the positioning method of the corresponding mobile terminal in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.
Based on the same inventive concept, the present application also provides a non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the positioning method of the mobile terminal according to any of the embodiments.
The computer readable media of the present embodiments, including both permanent and non-permanent, removable and non-removable media, may be used to implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device.
The storage medium of the foregoing embodiments stores computer instructions for causing the computer to execute the positioning method of the mobile terminal according to any one of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which are not described herein.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the application (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the application as described above, which are not provided in detail for the sake of brevity.
Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the embodiments of the present application. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the embodiments of the present application, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the present application are to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.
While the application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are within the spirit and principles of the embodiments of the application, are intended to be included within the scope of the application.

Claims (10)

1. A positioning method of a mobile terminal, applied to a positioning system, the positioning system including a mobile terminal and a plurality of wireless access point devices, the wireless access point devices providing wireless network connection services for the mobile terminal, comprising:
acquiring a distribution diagram of wireless access point equipment and a first signal which is currently received by the mobile terminal and sent by at least one wireless access point equipment in response to receiving a network access request of the mobile terminal;
based on at least one first signal, carrying out first region division on the distribution map so as to determine a target region where the mobile terminal is located;
responsive to detecting the change in the at least one first signal, re-acquiring a second signal received by the mobile terminal and transmitted by the at least one wireless access point device;
and carrying out second region division on the target region based on at least one second signal so as to determine the target position of the mobile terminal.
2. The method according to claim 1, characterized in that before receiving the network access request of the mobile terminal, the method comprises:
the transmission channels of the plurality of wireless access point devices are deployed so that the transmission channels between adjacent wireless access point devices and the mobile terminal are different.
3. The method of claim 1, wherein the first region dividing the profile based on the at least one first signal to determine a target region in which the mobile terminal is located comprises:
calculating a first distance between wireless access point equipment corresponding to the first signal and the mobile terminal based on the strength indication value of the first signal;
correcting the first distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device;
taking the wireless access point equipment corresponding to each first signal as a sphere center, and taking the corrected first distance corresponding to the wireless access point equipment as a radius to obtain a first sphere;
a plurality of first spherically intersecting regions is determined as the target region.
4. The method of claim 3, wherein the calculating a first distance between the wireless access point device corresponding to the first signal and the mobile terminal based on the strength indication value of the first signal comprises:
Each first distance is calculated by the following formula:
wherein P is r1 For the strength indication value of the first signal, P t1 G for the first transmit power of the wireless access point device t1 G for a first transmission gain of the wireless access point device r1 For the first receiving gain of the mobile terminal, h t1 A first height, h, of the wireless access point device from a preset plane r1 D, a first height from a preset plane for the mobile terminal z1 For the first distance d 1 For the first initial distance to be a first,and the noise variance corresponding to the wireless access point equipment after the first area is divided.
5. The method of claim 1, wherein the second region dividing the target region based on the at least one second signal to determine a target location where the mobile terminal is located comprises:
calculating a second distance between the wireless access point equipment corresponding to the second signal and the mobile terminal based on the strength indication value of the second signal;
correcting the second distance corresponding to each wireless access point device based on the direction and the downward inclination angle of the wireless access point device;
taking the wireless access point equipment corresponding to each second signal as a sphere center, and taking the corrected second distance corresponding to the wireless access point equipment as a radius to obtain a second sphere;
And determining the center point of the intersected areas of the second spheres as the target position of the mobile terminal.
6. The method of claim 5, wherein calculating a second distance between the wireless access point device corresponding to the second signal and the mobile terminal based on the strength indication value of the second signal comprises:
each second distance is calculated by the following formula:
wherein P is r2 For the strength indication value of the second signal, P t2 G for a second transmit power of the wireless access point device t2 G for a second transmission gain of the wireless access point device r2 For a second receiving gain of the mobile terminal, h t2 A second height, h, from a preset plane for the wireless access point device r2 D, a second height from a preset plane for the mobile terminal z2 For the second distance d 2 For the second initial distance to be a second,and the noise variance corresponding to the wireless access point equipment after the second area is divided.
7. The method according to claim 1, wherein the method further comprises:
periodically acquiring a plurality of target positions, and determining a fitting curve based on the plurality of target positions;
determining an average movement rate of the mobile terminal based on the plurality of target locations;
And determining the target position of the mobile terminal in the next period based on the fitted curve and the average moving speed.
8. A positioning apparatus of a mobile terminal, applied to a positioning system including a mobile terminal and a plurality of wireless access point devices, the wireless access point devices providing wireless network connection services for the mobile terminal, comprising:
a first acquisition module configured to acquire a distribution diagram of a wireless access point device and a first signal currently received by the mobile terminal and transmitted by at least one wireless access point device in response to receiving a network access request of the mobile terminal;
the first area dividing module is configured to perform first area division on the distribution diagram based on at least one first signal so as to determine a target area where the mobile terminal is located;
a second acquisition module configured to re-acquire a second signal received by the mobile terminal and transmitted by at least one wireless access point device in response to detecting that at least one first signal has changed;
and the second area dividing module is configured to perform second area division on the target area based on at least one second signal so as to determine the target position of the mobile terminal.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 7 when the program is executed by the processor.
10. A non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 7.
CN202310560953.2A 2023-05-17 2023-05-17 Positioning method and device of mobile terminal, electronic equipment and storage medium Pending CN116634355A (en)

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