CN108024202B - Method and device for adjusting position of wireless Access Point (AP) - Google Patents

Method and device for adjusting position of wireless Access Point (AP) Download PDF

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CN108024202B
CN108024202B CN201711285669.XA CN201711285669A CN108024202B CN 108024202 B CN108024202 B CN 108024202B CN 201711285669 A CN201711285669 A CN 201711285669A CN 108024202 B CN108024202 B CN 108024202B
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CN108024202A (en
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钟宇樵
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Ruijie Networks Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18Network planning tools
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/08Testing, supervising or monitoring using real traffic
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information

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Abstract

The embodiment of the invention provides a method and a device for adjusting the position of an AP (access point), wherein the method comprises the following steps: acquiring respective adjacent AP information reported by n APs in a region and signal strength between the n APs and the respective adjacent AP, and determining the distance between every two adjacent APs according to the signal strength, wherein n is a natural number more than or equal to 3; sequencing the distances between every two adjacent APs, and determining m APs with the closest distance between every two APs according to a sequencing result, wherein m is a natural number which is less than or equal to n and is greater than or equal to 3; and when the difference value between n and m is not 0, determining the positions of the rest n-m APs according to the m APs. The problem of the inconvenience of entering the AP point location on the map is solved, and the usability of the operation of the positioning system is improved.

Description

Method and device for adjusting position of wireless Access Point (AP)
Technical Field
The invention relates to the field of data communication, in particular to a method and a device for adjusting the position of a wireless Access Point (AP).
Background
As the share of the positioning demand increases, for example: medical assets and patient positioning, school campus student positioning, large business overload people stream positioning and the like all have more demands on a positioning system.
In these locations, a large number of wireless access points AP need to be deployed to meet the field positioning accuracy. In this case, a large number of APs and AP position adjustment need to be added to the positioning system, and a great deal of effort needs to be invested to confirm and adjust the AP positions due to the large number of APs.
Currently, when an AP is added to a positioning system, the AP is mainly added through the following two ways:
1. a single click on AP location add.
And right clicking the corresponding area on a map needing to edit the AP position, and selecting to add the AP. Then click to confirm after inputting AP information.
2. After batch import, the AP position is manually adjusted one by one.
A table of AP related information is first collated.
And clicking batch import on the positioning system to import the form into the system.
After the AP is imported, disordered AP information can be presented in the map, and the AP position needs to be adjusted manually.
It can be seen that the prior art has the problems of complicated operation and long time consuming for the entry user to add/adjust the AP position when configuring the positioning system for the first time.
Disclosure of Invention
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
a method of adjusting a wireless access point, AP, location, comprising:
acquiring respective adjacent AP information reported by n APs in a region and signal strength between the n APs and the respective adjacent AP, and determining the distance between every two adjacent APs according to the signal strength, wherein n is a natural number more than or equal to 3;
sequencing the distances between every two adjacent APs, and determining m APs with the closest distance between every two APs according to a sequencing result, wherein m is a natural number which is less than or equal to n and is greater than or equal to 3;
and when the difference value between n and m is not 0, determining the positions of the rest n-m APs according to the m APs.
Optionally, when the difference between n and m is not 0, the step of determining the positions of the remaining n-m APs according to the m APs specifically includes:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, determining the positions of the f APs according to the second signal strength;
step four, adding the f APs into the first AP set, and adding f to the value of k;
and repeating the steps two to four until the set condition is triggered.
The embodiment of the invention has the beneficial effects that: the problem of the inconvenience of entering the AP point location on the map is solved, and the usability of the operation of the positioning system is improved.
Optionally, when the difference between n and m is not 0, the step of determining the positions of the remaining n-m APs according to the m APs specifically includes:
step one, establishing a first AP set according to the m APs;
step two, when the difference value between n and the number k of the APs in the first AP set is not 0, selecting a first AP from the n-k APs;
step three, when the difference value of the first signal strength between the first AP and each AP in the first AP set is smaller than a first threshold value, determining the position of the first AP according to the first signal strength;
step four, adding the first AP into the first AP set, and adding 1 to the value of k;
and repeating the steps two to four until the set condition is triggered.
Optionally, the set conditions are as follows: and the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is greater than or equal to the second threshold value.
Optionally, the step of determining the positions of the f APs according to the second signal strength specifically includes:
calculating the distance between each pair of the f APs and each AP in the first AP set according to the second signal strength between each pair of the f APs and each AP in the first AP set;
and determining the positions of the f APs by adopting a least square method according to the distance between each two of the f APs and each AP in the first AP set.
Another aspect of the embodiments of the present invention is to provide an apparatus for adjusting an AP position of a wireless access point, including:
an obtaining module, configured to obtain respective neighboring AP information reported by n APs in a region to which the AP belongs and signal strength between the AP and the respective neighboring AP, where n is a natural number greater than or equal to 3;
the distance determining module is used for determining the distance between every two adjacent APs according to the signal intensity;
a sorting module for sorting the distances between the two adjacent APs,
the AP determining module is used for determining m APs with the closest distance between every two APs according to the sequencing result, wherein m is a natural number which is less than or equal to n and is greater than or equal to 3;
and the positioning module is used for determining the positions of the rest n-m APs according to the m APs when the difference value between n and m is not 0.
Optionally, the positioning module is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, determining the positions of the f APs according to the second signal strength;
step four, adding the f APs into the first AP set, and adding f to the value of k;
and repeating the steps two to four until the set condition is triggered.
Optionally, the positioning module is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference value between n and the number k of the APs in the first AP set is not 0, selecting a first AP from the n-k APs;
step three, when the difference value of the first signal strength between the first AP and each AP in the first AP set is smaller than a first threshold value, determining the position of the first AP according to the first signal strength;
step four, adding the first AP into the first AP set, and adding 1 to the value of k;
and repeating the steps two to four until the set condition is triggered.
Optionally, the set conditions are as follows: and the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is greater than or equal to the second threshold value.
Optionally, the positioning module is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, calculating the distance between each two of the f APs and each AP in the first AP set according to the second signal strength between each two of the f APs and each AP in the first AP set; determining the positions of the f APs by adopting a least square method according to the distance between each two of the f APs and each AP in the first AP set;
step four, adding the f APs into the first AP set, and adding f to the value of k;
and repeating the steps two to four until the set condition is triggered.
The embodiment of the invention has the beneficial effects that: the problem of the inconvenience of entering the AP point location on the map is solved, and the usability of the operation of the positioning system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method according to an embodiment of the present invention;
FIG. 2 is a system diagram of an embodiment of the present invention;
fig. 3 is a diagram illustrating an apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for adjusting an AP position of a wireless access point, as shown in fig. 1, including:
s101, obtaining respective adjacent AP information reported by n APs in the region and signal strength between the n APs and the respective adjacent AP,
s103, determining the distance between every two adjacent APs according to the signal intensity, wherein n is a natural number which is more than or equal to 3;
s105, sequencing the distances between every two adjacent APs,
s107, determining m APs with the closest distance between every two APs according to the sorting result, wherein m is a natural number which is less than or equal to n and is greater than or equal to 3;
and S109, when the difference value between n and m is not 0, determining the positions of the rest n-m APs according to the m APs.
Optionally, step S109 specifically includes:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, determining the positions of the f APs according to the second signal strength;
step four, adding the f APs into the first AP set, and adding f to the value of k;
and repeating the steps two to four until the set condition is triggered.
Optionally, step S109 specifically includes:
step one, establishing a first AP set according to the m APs;
step two, when the difference value between n and the number k of the APs in the first AP set is not 0, selecting a first AP from the n-k APs;
step three, when the difference value of the first signal strength between the first AP and each AP in the first AP set is smaller than a first threshold value, determining the position of the first AP according to the first signal strength;
step four, adding the first AP into the first AP set, and adding 1 to the value of k;
and repeating the steps two to four until the set condition is triggered.
Optionally, the set conditions are as follows: and the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is greater than or equal to the second threshold value.
Optionally, the step of determining the positions of the f APs according to the second signal strength specifically includes:
calculating the distance between each pair of the f APs and each AP in the first AP set according to the second signal strength between each pair of the f APs and each AP in the first AP set;
and determining the positions of the f APs by adopting a least square method according to the distance between each two of the f APs and each AP in the first AP set.
The following further explains the embodiment of the present invention with reference to a specific application scenario, and fig. 2 is a system diagram of the application scenario:
in the application scenario, after the site construction is completed and the wireless access point AP point locations are deployed, the beacon information reported by each wireless access point AP to the positioning server is obtained, wherein the beacon information comprises the AP information adjacent to each AP and the signal strength between each AP and the adjacent AP.
Specifically, after the site completes the installation and power-on of each AP, each AP may detect beacon information of an adjacent AP, where the beacon information mainly includes the following contents:
signal strength h: the signal strength with neighboring APs is used to scale the distance between APs.
Source address: and the MAC addresses of the adjacent APs are used for determining the affiliated APs.
After capturing the information, each AP configures a command on each AP, so that each AP transmits the data to the location server, where the uploaded data includes:
the MAC address of the local AP uploading data, the MAC address of the detected neighboring AP, and the signal strength between the neighboring AP.
After receiving the information, the positioning server stores the information into a cache queue, and the stored contents are shown in table 1:
Figure BDA0001498387410000081
TABLE 1
And on a positioning server, determining the distance between every two adjacent APs according to the signal strength, sequencing the distances between every two adjacent APs, and determining three AP positions with the shortest distance according to the sequencing result.
Based on the set formed by the three APs, screening the APs which are all < -55db away from other APs and have the signal strengths of the three APs at the same time, and obtaining the fourth and more AP positions according to a signal strength conversion distance formula.
The method specifically comprises the following steps: taking AP1, AP2 and AP3 as baselines, and AP4-APn as AP to be calculated, as shown in Table 2:
AP4 AP5 AP6 AP7 AP8 AP…n
AP1 -70db -75db -80db -30db -45db
AP2 -35db -75db -80db -20db -45db
AP3 -40db -10db -80db -10db -45db
calculation results Discard the Discard the Discard the Point location AP Point location AP
TABLE 2
From the above results, it can be found that the signals of AP7 and AP8 meet the conditional point AP.
The distances from AP7 and AP8 to AP1-3 were calculated according to the RSSI transform distance formula (general formula), as shown in table 3.
AP7 AP8
AP1 30 m 45 m
AP2 20 m 45 m
AP3 10 m 45 m
TABLE 3
Calculating the positions of the AP7 and the AP8 on the map according to a least square method, wherein the calculation steps are as follows: comparing the AP7 with the AP1 to find the location where the AP7 may be located, if the distance between the AP1 and the AP7 is a radius with the AP1 as a center, the AP7 may be located at any point on the circumference.
Based on the comparison of AP7 with AP1, the positions of AP7 and AP2 are increased, and the position of AP7 is probably located.
The final position of AP7 was generated by increasing the position of AP7 versus AP3 based on AP7 versus AP1 and AP 2.
The AP8 is calculated according to the method for calculating the AP7 position, and then the position of the AP8 can be obtained.
After the treatment is completed, the AP7 and the AP8 are simultaneously included in the same basic statistical range as the AP1-AP3, a new set is formed, and a new round of data is generated by the calculation method, and the data are shown in the following table 4:
AP4 AP5 AP6 AP9 AP10 AP…n
AP1 -70db -75db -80db -30db -45db
AP2 -35db -75db -80db -20db -45db
AP3 -40db -10db -80db -10db -45db
AP7 -40db -10db -80db -10db -10db
AP8 -40db -10db -80db -10db -10db
calculation results Discard the Discard the Discard the Point location AP Point location AP
TABLE 4
And by analogy, calculating all AP point positions with the signal strength smaller than-55 db, wherein the signal strengths between the rest APs and the basic statistical AP are all larger than-55 db. The pop-up prompt tells the user: the remaining AP points have problems and cannot accurately calculate the AP positions, and user optimization is recommended, or calculation is continued, and the signal strength thresholds used in calculation may be sequentially as shown in table 5:
number of times Signal strength
For the first time <-55db
For the second time <-75db
The third time Unable to calculate, quit the algorithm
TABLE 5
After the AP point location is generated, the AP position automatically calculated for the system is prompted, and the user can perform fine adjustment according to the actual AP deployment position.
Another aspect of the embodiments of the present invention is to provide an apparatus for adjusting an AP position of a wireless access point, as shown in fig. 3, including:
an obtaining module 201, configured to obtain respective neighboring AP information reported by n APs in a corresponding area and signal strength between the n APs and the respective neighboring AP, where n is a natural number greater than or equal to 3;
a distance determining module 203, configured to determine a distance between every two adjacent APs according to the signal strength;
a ranking module 205 for ranking the distances between the two neighboring APs,
an AP determining module 207, configured to determine m APs with the closest distance between each two APs according to the sorting result, where m is a natural number less than or equal to n and greater than or equal to 3;
a positioning module 209, configured to determine, according to the m APs, positions of the remaining n-m APs when a difference between n and m is not 0.
Optionally, the positioning module 209 is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, determining the positions of the f APs according to the second signal strength;
step four, adding the f APs into the first AP set, and adding f to the value of k;
and repeating the steps two to four until the set condition is triggered.
Optionally, the positioning module 209 is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference value between n and the number k of the APs in the first AP set is not 0, selecting a first AP from the n-k APs;
step three, when the difference value of the first signal strength between the first AP and each AP in the first AP set is smaller than a first threshold value, determining the position of the first AP according to the first signal strength;
step four, adding the first AP into the first AP set, and adding 1 to the value of k;
and repeating the steps two to four until the set condition is triggered.
Optionally, the set conditions are as follows: and the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is greater than or equal to the second threshold value.
Optionally, the positioning module 209 is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, calculating the distance between each two of the f APs and each AP in the first AP set according to the second signal strength between each two of the f APs and each AP in the first AP set; determining the positions of the f APs by adopting a least square method according to the distance between each two of the f APs and each AP in the first AP set;
step four, adding the f APs into the first AP set, and adding f to the value of k;
and repeating the steps two to four until the set condition is triggered.
The embodiment of the invention has the beneficial effects that: the problem of the inconvenience of entering the AP point location on the map is solved, and the usability of the operation of the positioning system is improved.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. A method for adjusting the position of an AP (access point), comprising:
acquiring respective adjacent AP information reported by n APs in a region and signal strength between the n APs and the respective adjacent AP, and determining the distance between every two adjacent APs according to the signal strength, wherein n is a natural number more than or equal to 3;
sequencing the distances between every two adjacent APs, and determining m APs with the closest distance between every two APs according to a sequencing result, wherein m is a natural number which is less than or equal to n and is greater than or equal to 3;
when the difference value between n and m is not 0, determining the positions of the rest n-m APs according to the m APs;
when the difference between n and m is not 0, the step of determining the positions of the remaining n-m APs according to the m APs specifically includes:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, determining the positions of the f APs according to the second signal strength;
step four, adding the f APs into the first AP set, and adding f to the value of k;
repeating the second step to the fourth step until a set condition is triggered;
the set conditions are as follows: and the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is greater than or equal to the second threshold value.
2. The method according to claim 1, wherein, when the difference between n and m is not 0, the step of determining the positions of the remaining n-m APs according to the m APs specifically comprises:
step one, establishing a first AP set according to the m APs;
step two, when the difference value between n and the number k of the APs in the first AP set is not 0, selecting a first AP from the n-k APs;
step three, when the difference value of the first signal strength between the first AP and each AP in the first AP set is smaller than a first threshold value, determining the position of the first AP according to the first signal strength;
step four, adding the first AP into the first AP set, and adding 1 to the value of k;
and repeating the steps two to four until the set condition is triggered.
3. The method of claim 1,
the step of determining the positions of the f APs according to the second signal strength specifically includes:
calculating the distance between each pair of the f APs and each AP in the first AP set according to the second signal strength between each pair of the f APs and each AP in the first AP set;
and determining the positions of the f APs by adopting a least square method according to the distance between each two of the f APs and each AP in the first AP set.
4. An apparatus for adjusting a position of an AP (access point), comprising:
an obtaining module, configured to obtain respective neighboring AP information reported by n APs in a region to which the AP belongs and signal strength between the AP and the respective neighboring AP, where n is a natural number greater than or equal to 3;
the distance determining module is used for determining the distance between every two adjacent APs according to the signal intensity;
a sorting module for sorting the distances between the two adjacent APs,
the AP determining module is used for determining m APs with the closest distance between every two APs according to the sequencing result, wherein m is a natural number which is less than or equal to n and is greater than or equal to 3;
the positioning module is used for determining the positions of the rest n-m APs according to the m APs when the difference value between n and m is not 0;
the positioning module is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, determining the positions of the f APs according to the second signal strength;
step four, adding the f APs into the first AP set, and adding f to the value of k;
repeating the second step to the fourth step until a set condition is triggered;
the set conditions are as follows: and the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is greater than or equal to the second threshold value.
5. The apparatus of claim 4, wherein the positioning module is specifically configured to perform the steps of:
step one, establishing a first AP set according to the m APs;
step two, when the difference value between n and the number k of the APs in the first AP set is not 0, selecting a first AP from the n-k APs;
step three, when the difference value of the first signal strength between the first AP and each AP in the first AP set is smaller than a first threshold value, determining the position of the first AP according to the first signal strength;
step four, adding the first AP into the first AP set, and adding 1 to the value of k;
and repeating the steps two to four until the set condition is triggered.
6. The apparatus of claim 5,
the positioning module is specifically configured to perform the following steps:
step one, establishing a first AP set according to the m APs;
step two, when the difference between n and the number k of the APs in the first AP set is not 0, selecting any f APs in the n-k APs, wherein f is a natural number less than or equal to n-k;
step three, when the difference value of the second signal strength between each two of the f APs and each AP in the first AP set is smaller than a second threshold value, calculating the distance between each two of the f APs and each AP in the first AP set according to the second signal strength between each two of the f APs and each AP in the first AP set; determining the positions of the f APs by adopting a least square method according to the distance between each two of the f APs and each AP in the first AP set;
step four, adding the f APs into the first AP set, and adding f to the value of k;
and repeating the steps two to four until the set condition is triggered.
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