CN116828393B - Configuration method and device for AP equipment quantity, electronic equipment and storage medium - Google Patents

Configuration method and device for AP equipment quantity, electronic equipment and storage medium Download PDF

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Publication number
CN116828393B
CN116828393B CN202311074817.9A CN202311074817A CN116828393B CN 116828393 B CN116828393 B CN 116828393B CN 202311074817 A CN202311074817 A CN 202311074817A CN 116828393 B CN116828393 B CN 116828393B
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equipment
mirror image
point
information entropy
calibration point
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CN116828393A (en
Inventor
张辉
吴正中
张云飞
刘喆
邓能文
王晓东
张东东
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Beijing Urban Construction Intelligent Control Technology Co ltd
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Beijing Urban Construction Intelligent Control Technology Co ltd
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    • 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
    • H04W4/024—Guidance services
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/06—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/10—Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

The invention discloses a configuration method and device for the number of AP (access point) devices, electronic devices and storage media. Wherein the method comprises the following steps: determining a wireless access AP equipment set and a signal calibration point in a positioning area; performing mirror image processing on a designated AP with the minimum distance from a wall in the AP equipment set to obtain an effective mirror image AP, and configuring an ineffective mirror image AP for other AP equipment except the designated AP, wherein the mirror image AP comprises the effective mirror image AP and the ineffective mirror image AP; calculating information gains of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP; and configuring the number of the AP equipment at each position point in the positioning area according to the information gain. By the method and the device, the utilization rate of the AP equipment in the positioning area is improved, the globally optimal positioning equipment layout is realized, and the technical problem of low utilization rate of the AP equipment in the related technology is solved.

Description

Configuration method and device for AP equipment quantity, electronic equipment and storage medium
Technical Field
The present invention relates to the field of indoor navigation, and in particular, to a method and apparatus for configuring the number of AP devices, an electronic device, and a storage medium.
Background
In the related art, under a complicated indoor scene such as a subway station, there is a need for indoor navigation, compared with the positioning of a GNSS (Global Navigation Satellite System ) under an outdoor scene, satellite signals of the indoor scene cannot penetrate, the signals are weaker, the GNSS fails, and the indoor positioning precision is higher than the outdoor positioning precision, so that auxiliary positioning is required by adopting an AP device, such as Bluetooth device, UWB device, WIFI device, zigBee device, RFID device and the like, but the auxiliary positioning technology of the AP device is also interfered by various factors, such as device arrangement mode, multipath effect, signal penetration attenuation and the like, so that the reasonable arrangement and cost reduction are the main targets of the invention on the premise of improving the precision, instantaneity and safety. In the positioning technology, the technologies such as fingerprint method and triangle positioning method are mainly adopted in the current industry, but the positioning effect is not ideal.
In the related art, the identifiable range of part of indoor AP equipment is small, the signal strength is influenced by the arrangement mode of the AP equipment, the multipath effect is easy to generate in a complex indoor environment, and the attenuation of the signal after penetrating through a wall body is obvious. In the conventional AP equipment arrangement process, an empirical value is generally adopted for arrangement, the arrangement mode of the used AP equipment is possibly unreasonable, the denser the AP equipment is, the higher the positioning precision is, and the cost of an AP network is in direct proportion to the number of the AP equipment, so that the AP equipment cannot be arranged without limitation. Meanwhile, because customized researches on the AP location and coverage area are lacking in the installation process, even if enough AP devices are installed, some areas still cannot be covered.
In view of the above problems in the related art, an effective solution has not been found.
Disclosure of Invention
The invention provides a configuration method and device for the number of AP (access point) devices, electronic devices and storage media.
According to an aspect of the embodiments of the present application, there is provided a method for configuring the number of AP devices, where the method includes: determining a wireless access AP equipment set and a signal calibration point in a positioning area; performing mirror image processing on a designated AP with the minimum distance from a wall in the AP equipment set to obtain an effective mirror image AP, and configuring an ineffective mirror image AP for other AP equipment except the designated AP, wherein the mirror image AP comprises the effective mirror image AP and the ineffective mirror image AP; calculating information gains of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP; and configuring the number of the AP equipment at each position point in the positioning area according to the information gain.
Further, determining the set of AP devices and the signal calibration point within the positioning area includes: determining an AP equipment set distributed by adopting a regular triangle in the positioning area, wherein the triangle side length of the regular triangle is the signal reachable distance when the packet loss rate of the AP equipment is equal to a packet loss rate threshold value; and randomly selecting the position point of one AP device in each regular triangle as a signal calibration point.
Further, calculating the information gain of all AP devices at each location point in the positioning area according to the signal calibration point and the mirror AP includes: calculating the information entropy of the calibration point of the signal aiming at the ith AP equipment in the positioning area, calculating the first condition information entropy of the calibration point under the information entropy condition of the ith AP equipment, and calculating the second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment; and calculating the information gain of the ith AP equipment by adopting the calibration point information entropy, the first condition information entropy and the second condition information entropy.
Further, calculating the calibration point information entropy of the signal calibration point includes: calculating the calibration point information entropy of the signal calibration point by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of the jth calibration point,for the j-th calibration point, n is the number of signal calibration points.
Further, calculating a first condition information entropy of the calibration point under the information entropy condition of the ith AP device, and calculating a second condition information entropy of the calibration point under the information entropy condition of the mirror AP of the ith AP device includes: calculating a first condition information entropy of the calibration point under the condition of an ith AP equipment information entropy by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,indicating for the received signal strength of the ith AP device whether an RSS value was detected at the jth calibration point,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability; if the ith AP equipment does not have the mirror image AP, the second condition information entropyIs 0; if the ith AP equipment has the mirror image AP, calculating a second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability.
Further, calculating the information gain of the ith AP device using the calibration point information entropy, the first condition information entropy, and the second condition information entropy includes: calculating the information gain of the ith AP device using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the purpose of calibrating the point information entropy,for the first conditional information entropy,is the second conditional information entropy.
Further, configuring the number of AP devices at each location point in the positioning area according to the information gain includes:
judging whether the information gain of the AP equipment exceeds an information gain threshold value or not for each AP equipment;
counting the judgment result of each positioning point in the positioning area, and judging whether the number of AP equipment with the information gain of the target positioning point exceeding the information gain threshold is larger than a preset value or not; if the information gain of the target positioning point exceeds the information gain threshold, the number of the AP devices is larger than a preset value, and the number of the AP devices arranged on the target positioning point is reduced; if the number of the AP devices of which the target positioning point information gain exceeds the information gain threshold is smaller than a preset value, the number of the AP devices arranged on the target positioning point is increased.
According to another aspect of the embodiments of the present application, there is also provided an apparatus for configuring the number of AP devices, including: the determining module is used for determining a wireless access AP equipment set and a signal calibration point in the positioning area; the processing module is used for carrying out mirror image processing on the designated AP with the minimum distance from the wall body in the AP equipment set to obtain an effective mirror image AP, and configuring an ineffective mirror image AP for other AP equipment except the designated AP, wherein the mirror image AP comprises the effective mirror image AP and the ineffective mirror image AP; the calculation module is used for calculating the information gain of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP; and the configuration module is used for configuring the number of the AP equipment at each position point in the positioning area according to the information gain.
Further, the determining module includes: the determining unit is used for determining an AP equipment set distributed by adopting a regular triangle in the positioning area, wherein the triangle side length of the regular triangle is the signal reachable distance when the packet loss rate of the AP equipment is equal to the packet loss rate threshold value; and the selecting unit is used for randomly selecting the position point of one AP device in each regular triangle as a signal calibration point.
Further, the computing module includes: a first calculating unit, configured to calculate, for an ith AP device in the positioning area, a calibration point information entropy of the signal calibration point, a first condition information entropy of the calibration point under an information entropy condition of the ith AP device, and a second condition information entropy of the calibration point under an information entropy condition of a mirror AP of the ith AP device; and a second calculation unit, configured to calculate an information gain of the ith AP device using the calibration point information entropy, the first condition information entropy, and the second condition information entropy.
Further, the first computing unit includes: a first calculation subunit for calculating the calibration point information entropy of the signal calibration point by using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of the jth calibration point,for the j-th calibration point, n is the number of signal calibration points.
Further, the first computing unit includes: a second calculation subunit, configured to calculate a first condition information entropy of the calibration point under the ith AP device information entropy condition using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,indicating for the received signal strength of the ith AP device whether an RSS value was detected at the jth calibration point,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability; a third calculation subunit, configured to, if the ith AP device does not have a mirror AP, perform a second conditional information entropyIs 0; if the ith AP equipment has the mirror image AP, calculating a second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability.
Further, the second calculation unit includes: a calculating subunit for calculating the information gain of the ith AP device using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the purpose of calibrating the point information entropy,for the first conditional information entropy,is the second conditional information entropy.
Further, the configuration module includes: a first judging unit, configured to judge, for each AP device, whether an information gain of the AP device exceeds an information gain threshold; the second judging unit is used for counting the judging result of each locating point in the locating area and judging whether the number of the AP equipment with the information gain of the target locating point exceeding the information gain threshold value is larger than a preset value or not; the configuration unit is used for reducing the layout quantity of the AP equipment on the target locating point if the information gain of the target locating point exceeds the information gain threshold value and the AP equipment quantity is larger than a preset value; if the number of the AP devices of which the target positioning point information gain exceeds the information gain threshold is smaller than a preset value, the number of the AP devices arranged on the target positioning point is increased.
According to another aspect of the embodiments of the present application, there is also provided a storage medium including a stored program that performs the steps described above when running.
According to another aspect of the embodiments of the present application, there is also provided an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus; wherein: a memory for storing a computer program; and a processor for executing the steps of the method by running a program stored on the memory.
Embodiments of the present application also provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the steps of the above method.
According to the invention, the wireless access AP equipment set and the signal calibration points in the positioning area are determined, the designated AP with the minimum distance from the wall in the AP equipment set is subjected to mirror image processing to obtain the effective mirror image AP, the information gain of all the AP equipment at each position point in the positioning area is calculated according to the signal calibration points and the mirror image AP, the number of the AP equipment at each position point in the positioning area is configured according to the information gain, the problem of optimizing the AP equipment layout of the multipath effect in an indoor scene is solved, each AP equipment under the multipath effect is quantized through the information gain calculation, redundant AP equipment is reduced, effective AP equipment is supplemented, the cost can be reduced, the positioning progress and the coverage rate are improved, the utilization rate of the AP equipment in the positioning area is improved, the globally optimal positioning equipment layout is realized, and the technical problem of low utilization rate of the AP equipment in the related technology is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a block diagram of the hardware architecture of a computer according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for configuring the number of AP devices according to an embodiment of the present invention;
fig. 3 is a layout schematic diagram of an AP device in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a mirrored version of an embodiment of the invention;
FIG. 5 is a flow chart of an embodiment of the present invention;
fig. 6 is a block diagram of a configuration apparatus for the number of AP devices according to an embodiment of the present invention.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
The method embodiment provided in the first embodiment of the present application may be executed in a controller, a mobile phone, a server, a computer, a tablet, or a similar computing device. Taking a computer as an example, fig. 1 is a block diagram of a hardware structure of a computer according to an embodiment of the present invention. As shown in fig. 1, the computer may include one or more processors 102 (only one is shown in fig. 1) (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, and optionally, a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those of ordinary skill in the art that the configuration shown in FIG. 1 is merely illustrative and is not intended to limit the configuration of the computer described above. For example, the computer may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a method for configuring the number of AP devices in an embodiment of the present invention, and the processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, that is, implement the above-mentioned method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, memory 104 may further include memory located remotely from processor 102, which may be connected to the computer via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communications provider of a computer. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.
In this embodiment, a method for configuring the number of AP devices is provided, and fig. 2 is a flowchart of a method for configuring the number of AP devices according to an embodiment of the present invention, as shown in fig. 2, where the flowchart includes the following steps:
step S202, determining a wireless access AP equipment set and a signal calibration point in a positioning area;
AP devices include, but are not limited to, WIFI devices, bluetooth devices, UBW devices, zigBee devices, RFID devices.
The scheme of the embodiment can be applied to places such as subway stations, railway stations, bus stops, airports and the like.
Step S204, mirror image processing is carried out on a designated AP with the minimum distance from a wall body in the AP equipment set to obtain an effective mirror image AP, and an ineffective mirror image AP is configured for other AP equipment except the designated AP, wherein the mirror image AP comprises an effective mirror image AP and an ineffective mirror image AP;
the data corresponding to the invalid mirror AP of the present embodiment is null.
Step S206, calculating the information gain of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP;
step S208, the number of the AP equipment at each position point in the positioning area is configured according to the information gain.
Through the steps, the wireless access AP equipment set and the signal calibration points in the positioning area are determined, the designated AP with the minimum distance from the wall in the AP equipment set is subjected to mirror image processing to obtain an effective mirror image AP, the information gain of all the AP equipment at each position point in the positioning area is calculated according to the signal calibration points and the mirror image AP, the number of the AP equipment at each position point in the positioning area is configured according to the information gain, the problem of optimizing the layout of the AP equipment under the indoor scene due to the multipath effect is solved, the AP equipment under the multipath effect is quantized through the information gain calculation, redundant AP equipment is reduced, effective AP equipment is supplemented, the cost can be reduced, the positioning progress and the coverage rate are improved, the utilization rate of the AP equipment in the positioning area is improved, the globally optimal positioning equipment layout is realized, and the technical problem of low utilization rate of the AP equipment in the related technology is solved.
In this embodiment, determining the set of AP devices and the signal calibration point within the positioning area includes: determining an AP equipment set distributed by adopting a regular triangle in a positioning area, wherein the triangle side length of the regular triangle is the signal reachable distance when the packet loss rate of the AP equipment is equal to a packet loss rate threshold value; and randomly selecting the position point of one AP device in each regular triangle as a signal calibration point.
Based on the principle of indoor triangular positioning, at least 3 AP signals are needed for indoor positioning of one device, and the distance between the device to be positioned and the AP device is judged through the signal intensity, so that all AP nodes are laid in a regular triangle composition mode during initialization, the triangle side length is the signal reachable distance when the packet loss rate of the AP device is equal to the packet loss rate threshold value, and one of the signal reachable distances is randomly selected to be used as a signal calibration point L. Fig. 3 is a layout diagram of an AP device in an embodiment of the present invention.
When the designated AP with the smallest distance from the wall is selected from the AP device set, the embodiment may determine by calculating the smallest projection distance between the AP device and the wall, and select the AP device with the smallest projection distance smaller than the preset value as the designated AP.
Fig. 4 is a schematic diagram of the mirror image processing in the embodiment of the present invention, when the multipath effect is considered, the AP device signal will reflect when encountering the wall surface, so when the signal is actually received, the multipath effect is particularly obvious, especially when the corner or the like is blocked, and therefore, the influence caused by the multipath effect can be solved by performing the mirror image processing on the AP device through the wall surface.
In one implementation of this embodiment, calculating the information gain of all AP devices at each location point in the positioning area based on the signal calibration points and the mirrored APs includes:
s11, calculating the information entropy of a calibration point of a signal aiming at the ith AP device in a positioning area, calculating the first condition information entropy of the calibration point under the information entropy condition of the ith AP device, and calculating the second condition information entropy of the calibration point under the information entropy condition of a mirror image AP of the ith AP device;
and if the mirror image AP of the ith AP equipment is an invalid mirror image AP, the second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment is 0.
In one example, calculating the calibration point information entropy of the signal calibration points includes: calculating the information entropy of the calibration points of the signal by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of the jth calibration point,for the j-th calibration point, n is the number of signal calibration points.
In one example, calculating a first conditional information entropy of the calibration point under the ith AP device information entropy condition includes: calculating a first condition information entropy of the calibration point under the condition of an ith AP equipment information entropy by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,indicating for the received signal strength of the ith AP device whether an RSS value was detected at the jth calibration point,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability.
In one example, the calibration point is calculated at the firstThe second condition information entropy under the information entropy condition of mirror APs of the i AP devices includes: if the ith AP equipment does not have the mirror image AP, the second condition information entropyIs 0; if the ith AP equipment has the mirror image AP, calculating a second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability.
S12, calculating the information gain of the ith AP equipment by using the calibration point information entropy, the first condition information entropy and the second condition information entropy.
In one example, calculating the information gain of the ith AP device using the calibration point information entropy, the first condition information entropy, and the second condition information entropy includes: calculating the information gain of the ith AP device using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the purpose of calibrating the point information entropy,for the first conditional information entropy,is the second conditional information entropy.
In the above-mentioned formula(s),for the ith AP device,is a mirror image of the ith AP device,for the information gain of the ith AP device, IG (information gain),for the entropy of the calibration point information, L is the calibration point,for the conditional information entropy of the calibration point under the condition of the ith AP device information entropy,and (3) the condition information entropy of the calibration point under the mirror information entropy condition of the ith AP equipment.
；
For the probability of the jth calibration point,is the j-th calibration point.
；
Whether the RSS value for the ith AP device is detected at the jth calibration point,for the probability of whether the RSS (received signal strength indicator received signal strength indication) value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,is a conditional probability (inUnder the condition of (a) and (b),probability of occurrence (j-th calibration point valid). Each AP device of this embodiment has only one RSS value at one calibration point, with different RSS values referring to values at different calibration points (RSS values will decrease with increasing distance). When determining whether the calibration point is valid, judging whether the j-th calibration point and the i-th AP device are in the same regular triangle, if so, the calibration point is valid, otherwise, the calibration point is invalid.
；
For the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,is a conditional probability (inUnder the condition of (2)Probability of occurrence).
；
。
In one example of this embodiment, configuring the number of AP devices at each location point in the location area according to the information gain includes: judging whether the information gain of the AP equipment exceeds an information gain threshold value or not according to each AP equipment; counting the judgment result of each positioning point in the positioning area, and judging whether the number of AP equipment with the information gain of the target positioning point exceeding the information gain threshold is larger than a preset value; if the information gain of the target positioning point exceeds the information gain threshold, the number of the AP devices is larger than a preset value, and the number of the AP devices arranged on the target positioning point is reduced; if the information gain of the target positioning point exceeds the information gain threshold, the number of the AP devices is smaller than a preset value, and the number of the AP devices is increased on the target positioning point.
If the number of the AP devices of which the target positioning point information gain exceeds the information gain threshold is larger than a preset value, the target position is a redundant position, redundant AP devices exist and need to be reduced, and if the number of the AP devices of which the target positioning point information gain exceeds the information gain threshold is smaller than the preset value, the target position is an effective position, and the AP devices at the target position are all effective devices and need to be supplemented.
Optionally, the preset value is 3, when the number of AP devices whose target setpoint information gain exceeds the information gain threshold is greater than 3, the number of AP devices is reduced to 3, but when the number of AP devices whose target setpoint information gain exceeds the information gain threshold is less than 3, the number of AP devices is increased to 3.
Information gain obtained by calculationAnd information gain threshold(preset value) comparing, when the number of AP devices whose information gain exceeds the information gain threshold at a certain point is not equal to 3, when the number of AP devices whose information gain exceeds the information gain threshold at a certain point is less than 3, increasing the AP arrangement point, when the information gain exceeds the information gain threshold at a certain pointAnd when the number of the AP devices is more than 3, reducing the AP arrangement points at the corresponding positions. And returns to step 2. And finally, outputting the AP layout position.
The embodiment provides an indoor scene AP equipment position optimization method based on multi-objective optimization under the multipath effect, and the method is combined with information gain calculation under the condition of considering the multipath effect and the BIM model to optimize the position layout of positioning equipment, so that the positioning accuracy and the utilization rate of the positioning equipment can be improved. FIG. 5 is a flow chart of an embodiment of the present invention, comprising:
step 501: setting an initial position and an AP signal calibration point;
step 502: mirroring the AP nodes near the wall;
step 503: calculating information gain;
step 504: comparing information gain threshold values;
step 505: boundary AP position optimization;
step 506: and outputting the AP layout position.
By adopting the scheme of the embodiment, the problem of optimizing the layout of the AP equipment under the indoor scene of the multipath effect is solved, each AP equipment under the multipath effect is quantized through information gain calculation, and the layout is optimized, so that the cost can be reduced, the positioning progress is improved, and the globally optimal layout of the positioning equipment is realized.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
Example 2
The embodiment also provides a configuration device for the number of AP devices, which is used to implement the foregoing embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
Fig. 6 is a block diagram of a configuration apparatus for the number of AP devices according to an embodiment of the present invention, as shown in fig. 6, including:
a determining module 60, configured to determine a set of wireless access AP devices and a signal calibration point in a positioning area;
the processing module 62 is configured to perform image processing on a designated AP with a minimum distance from a wall in the AP device set to obtain an effective image AP, and configure an invalid image AP for other AP devices except for the designated AP, where the image AP includes the effective image AP and the invalid image AP;
a calculation module 64, configured to calculate information gains of all AP devices at each location point in the location area according to the signal calibration point and the mirror AP;
and a configuration module 66, configured to configure the number of AP devices at each location point in the location area according to the information gain.
Optionally, the determining module includes: the determining unit is used for determining an AP equipment set distributed by adopting a regular triangle in the positioning area, wherein the triangle side length of the regular triangle is the signal reachable distance when the packet loss rate of the AP equipment is equal to the packet loss rate threshold value; and the selecting unit is used for randomly selecting the position point of one AP device in each regular triangle as a signal calibration point.
Optionally, the computing module includes: a first calculating unit, configured to calculate, for an ith AP device in the positioning area, a calibration point information entropy of the signal calibration point, a first condition information entropy of the calibration point under an information entropy condition of the ith AP device, and a second condition information entropy of the calibration point under an information entropy condition of a mirror AP of the ith AP device; and a second calculation unit, configured to calculate an information gain of the ith AP device using the calibration point information entropy, the first condition information entropy, and the second condition information entropy.
Optionally, the first computing unit includes: a first calculation subunit for calculating the calibration point information entropy of the signal calibration point by using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of the jth calibration point,for the j-th calibration point, n is the number of signal calibration points.
Optionally, the first computing unit includes: a second calculation subunit, configured to calculate a first condition information entropy of the calibration point under the ith AP device information entropy condition using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,indicating for the received signal strength of the ith AP device whether an RSS value was detected at the jth calibration point,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability; a third calculation subunit, configured to, if the ith AP device does not existAt mirror AP, a second conditional information entropyIs 0; if the ith AP equipment has the mirror image AP, calculating a second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment by adopting the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the probability of whether the RSS value of the ith AP device is detected at the jth calibration point while the jth calibration point is valid,n is the number of signal calibration points, which is a conditional probability.
Optionally, the second computing unit includes: a calculating subunit for calculating the information gain of the ith AP device using the following formula：The method comprises the steps of carrying out a first treatment on the surface of the Wherein,for the purpose of calibrating the point information entropy,for the first conditional information entropy,is the second conditional information entropy.
Optionally, the configuration module includes: a first judging unit, configured to judge, for each AP device, whether an information gain of the AP device exceeds an information gain threshold; the second judging unit is used for counting the judging result of each locating point in the locating area and judging whether the number of the AP equipment with the information gain of the target locating point exceeding the information gain threshold value is larger than a preset value or not; the configuration unit is used for reducing the layout quantity of the AP equipment on the target locating point if the information gain of the target locating point exceeds the information gain threshold value and the AP equipment quantity is larger than a preset value; if the number of the AP devices of which the target positioning point information gain exceeds the information gain threshold is smaller than a preset value, the number of the AP devices arranged on the target positioning point is increased.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
Example 3
An embodiment of the invention also provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
Alternatively, in the present embodiment, the above-described storage medium may be configured to store a computer program for performing the steps of:
s1, determining a wireless access AP equipment set and a signal calibration point in a positioning area;
s2, carrying out mirror image processing on a designated AP with the minimum distance from a wall body in the AP equipment set to obtain an effective mirror image AP, and configuring an ineffective mirror image AP for other AP equipment except the designated AP, wherein the mirror image AP comprises the effective mirror image AP and the ineffective mirror image AP;
s3, calculating information gains of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP;
s4, configuring the number of the AP equipment at each position point in the positioning area according to the information gain.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing a computer program.
An embodiment of the invention also provides an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
Optionally, the electronic device may further include a transmission device and an input/output device, where the transmission device is connected to the processor, and the input/output device is connected to the processor.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
s1, determining a wireless access AP equipment set and a signal calibration point in a positioning area;
s2, carrying out mirror image processing on a designated AP with the minimum distance from a wall body in the AP equipment set to obtain an effective mirror image AP, and configuring an ineffective mirror image AP for other AP equipment except the designated AP, wherein the mirror image AP comprises the effective mirror image AP and the ineffective mirror image AP;
s3, calculating information gains of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP;
s4, configuring the number of the AP equipment at each position point in the positioning area according to the information gain.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the division of the units, is merely a logical function division, and may be implemented in another manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.

Claims (10)

1. A method for configuring the number of AP devices, the method comprising:
determining a wireless access AP equipment set and a signal calibration point in a positioning area;
performing mirror image processing on a designated AP with the minimum distance from a wall in the AP equipment set to obtain an effective mirror image AP, and configuring an ineffective mirror image AP for other AP equipment except the designated AP, wherein the mirror image AP comprises the effective mirror image AP and the ineffective mirror image AP;
calculating information gains of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP;
and configuring the number of the AP equipment at each position point in the positioning area according to the information gain.
2. The method of claim 1, wherein determining the set of AP devices and the signal calibration point within the location area comprises:
determining an AP equipment set distributed by adopting a regular triangle in the positioning area, wherein the triangle side length of the regular triangle is the signal reachable distance when the packet loss rate of the AP equipment is equal to a packet loss rate threshold value;
and randomly selecting the position point of one AP device in each regular triangle as a signal calibration point.
3. The method of claim 1, wherein calculating the information gain for all AP devices at each location point in the location area based on the signal calibration points and the mirrored APs comprises:
calculating the information entropy of the calibration point of the signal aiming at the ith AP equipment in the positioning area, calculating the first condition information entropy of the calibration point under the information entropy condition of the ith AP equipment, and calculating the second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment;
and calculating the information gain of the ith AP equipment by adopting the calibration point information entropy, the first condition information entropy and the second condition information entropy.
4. A method according to claim 3, wherein calculating the calibration point information entropy of the signal calibration points comprises:
calculating the calibration point information entropy of the signal calibration point by adopting the following formula：
The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>Probability for the j-th calibration point, +.>For the j-th calibration point, n is the number of signal calibration points.
5. The method of claim 3, wherein calculating a first conditional information entropy of the calibration point under an information entropy condition of an i-th AP device, and calculating a second conditional information entropy of the calibration point under an information entropy condition of a mirror AP of the i-th AP device comprises:
calculating a first condition information entropy of the calibration point under the condition of an ith AP equipment information entropy by adopting the following formula：
；
Wherein,indicating for the received signal strength of the ith AP device whether an RSS value was detected at the jth calibration point,probability of whether RSS value for the ith AP device is detected at the jth calibration point while the jth calibration point is valid, +.>N is the number of signal calibration points, which is a conditional probability;
if the ith AP equipment does not have the mirror image AP, the second condition information entropyIs 0; if the ith AP equipment has the mirror image AP, calculating a second condition information entropy of the calibration point under the information entropy condition of the mirror image AP of the ith AP equipment by adopting the following formula +.>：
；
Wherein,probability of whether RSS value for the ith AP device is detected at the jth calibration point while the jth calibration point is valid, +.>N is the number of signal calibration points, which is a conditional probability.
6. The method of claim 3, wherein calculating the information gain of the ith AP device using the calibration point information entropy, the first condition information entropy, and the second condition information entropy comprises:
calculating the information gain of the ith AP device using the following formula：
；
Wherein,for the calibration point information entropy +.>For the first conditional information entropy->Is the second conditional information entropy.
7. The method of claim 1, wherein configuring the number of AP devices at each location point in the location area based on the information gain comprises:
judging whether the information gain of the AP equipment exceeds an information gain threshold value or not for each AP equipment;
counting the judgment result of each positioning point in the positioning area, and judging whether the number of AP equipment with the information gain of the target positioning point exceeding the information gain threshold is larger than a preset value or not;
if the information gain of the target positioning point exceeds the information gain threshold, the number of the AP devices is larger than a preset value, and the number of the AP devices arranged on the target positioning point is reduced; if the number of the AP devices of which the target positioning point information gain exceeds the information gain threshold is smaller than a preset value, the number of the AP devices arranged on the target positioning point is increased.
8. A configuration apparatus for a number of AP devices, comprising:
the determining module is used for determining a wireless access AP equipment set and a signal calibration point in the positioning area;
the processing module is used for carrying out mirror image processing on the designated AP with the minimum distance from the wall body in the AP equipment set to obtain an effective mirror image AP, and configuring an ineffective mirror image AP for other AP equipment except the designated AP, wherein the mirror image AP comprises the effective mirror image AP and the ineffective mirror image AP;
the calculation module is used for calculating the information gain of all AP equipment at each position point in the positioning area according to the signal calibration points and the mirror image AP;
and the configuration module is used for configuring the number of the AP equipment at each position point in the positioning area according to the information gain.
9. The electronic equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus; wherein:
a memory for storing a computer program;
a processor for performing the steps of the method of any one of claims 1 to 7 by running a program stored on a memory.
10. A storage medium comprising a stored program, wherein the program when run performs the steps of the method of any of the preceding claims 1 to 7.
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