CN111586585A - Position fingerprint positioning method based on Wifi - Google Patents
Position fingerprint positioning method based on Wifi Download PDFInfo
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- CN111586585A CN111586585A CN202010378778.1A CN202010378778A CN111586585A CN 111586585 A CN111586585 A CN 111586585A CN 202010378778 A CN202010378778 A CN 202010378778A CN 111586585 A CN111586585 A CN 111586585A
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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
- H04W4/029—Location-based management or tracking services
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- 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
- G01S5/0257—Hybrid positioning
-
- 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
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- 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
Abstract
The invention discloses a position fingerprint positioning method based on Wifi, which specifically comprises the following steps: step S1: setting a wireless Wifi hotspot; step S2: data interaction; step S3: acquiring a position fingerprint; step S4: acquiring a position change track; set up wireless Wifi hotspot, lay more than 3 wireless Wifi hotspots (2.4G and 5G dual-frenquency) at least, the position of installation is with covering the whole field as the standard, as far as possible evenly distributed, acquire the wireless interactive data (including equipment identification Mac address, the timestamp, data such as signal strength) of all Wifi terminals and this hotspot in the field through wireless hotspot, mobile terminal collects the AP MAC address of peripheral deployment through installation sampling APP calling system API, signal strength RSSI, the SSID information, attach current timestamp simultaneously, send the positioning server, mobile terminal judges its orientation of locating through the direction sensor of its assembly, the complexity of construction has been avoided, installation work volume has been reduced, required equipment quantity has been reduced.
Description
Technical Field
The invention relates to the technical field of marketing, in particular to a position fingerprint positioning method based on Wifi,
background
At present, free Wifi access services are provided in many places, such as malls, cafes and 4s stores, and customers access to these places and then use the free Wifi access services provided in the places to surf the internet, but some given places, such as the 4s stores, need to distinguish the batches of customers, that is, who is store together with whom, in order to meet the need, a technology is needed to analyze the action tracks of the customers so as to determine the batches of the customers according to the similarity degree of the tracks,
in the former scenario, the batch of customers is determined by means of manual inquiry, and omission occurs, so a Wifi-based location fingerprint positioning method is urgently needed, the batch of customers is determined by analyzing the similarity degree of customer paths through the Wifi fingerprint positioning method, and the continuous determination can be carried out for 7 days and 24 hours, so that the omission situation is reduced,
disclosure of Invention
The invention aims to provide a position fingerprint positioning method based on Wifi, which calculates the relative position of Wifi terminal equipment by utilizing the acquisition of signals based on the Wifi terminal equipment so as to obtain a series of track characteristic sequences based on a time axis, determines the relative position of the Wifi equipment through the sequences so as to judge the track similarity of the terminal equipment, can judge the track similarity between any two customers although the relative position cannot accurately judge the accurate position of the equipment in a room, avoids heavy signal measurement and pre-positioning, avoids the complexity of construction, reduces the installation workload, reduces the required equipment quantity and solves the problems in the background technology,
in order to achieve the purpose, the invention adopts the following technical scheme: a position fingerprint positioning method based on Wifi specifically comprises the following steps:
step S1: setting wireless Wifi hotspots, at least laying more than 3 wireless Wifi hotspots (2.4G and 5G double-frequency) in a site, and uniformly distributing the installation positions as much as possible based on covering the whole site;
step S2: data interaction, namely acquiring wireless interaction data (including data such as equipment identification Mac addresses, timestamps and signal strength) of all Wifi terminals and the hotspot in a field through a wireless hotspot, collecting peripheral deployed AP MAC addresses, signal strength RSSI and SSID information by installing a sampling APP calling system API through a mobile terminal, attaching a current timestamp, and sending the information to a positioning server; the mobile terminal judges the direction of the mobile terminal through a direction sensor assembled on the mobile terminal, the direction is used as the direction of a user and is simultaneously sent to a positioning server, the wireless AP collects the MAC address of the sampling terminal and the RSSI of the transmitted signal strength, records the timestamp of the collection time and the AP and MAC addresses and sends the timestamp to the positioning server;
step S3: acquiring a position fingerprint, wherein the signal characteristics (signal strength, noise and the like) of each position of a customer in a store relative to all wireless hot spots in the store, which can receive signals of the customer, are different, all the signal characteristics in the position are combined and are called as the position fingerprint, the relative position of the customer in the store can be estimated through the position fingerprint, and if the similarity of the position fingerprints of two customers reaches a certain threshold value, the indoor positions of the two customers can be approximately considered to be the same;
step S4: the method comprises the steps of obtaining a position change track, acquiring a sequence of signal characteristics of a user relative to time at fixed time intervals to obtain a series of position fingerprint sequences of each customer in a store, and analyzing the sequences to obtain the position change track of the customer in the house.
Preferably, after receiving the offline sampling data sent by the mobile terminal and the wireless AP, the positioning server in step S2 averages the sampling values of the same sampling time period, aggregates different information of the same location, and stores the aggregated information in the offline fingerprint database, and refers to the location fingerprint combining the above multiple information as a composite fingerprint.
Preferably, the Mac address obtaining device in step S2 includes a baseband chip, an Mac address transmission module, a GPS positioning module, an Mac address processing module, and an alarm module; the base band chip is connected with the MAC address transmission module, the MAC address transmission module is connected with the MAC address processing module, the MAC address processing module is respectively connected with the GPS positioning module and the alarm module, and the GPS positioning module is connected with the electronic map through a data line; the MAC address processing module comprises a memory chip, an MAC address data analysis module and a trigger module; the storage chip is connected with the MAC address data analysis module, and the MAC address data analysis module is connected with the trigger module; the MAC address data analysis module and the MAC address transmission module; the triggering module is respectively connected with the GPS positioning module and the alarm module.
Preferably, the location server described in step S2 may further have the following features: the connection information is connection information of an access network of a communication opposite terminal of the terminal, or the connection information is connection information of the access network of the terminal, the access network of the communication opposite terminal of the terminal has a corresponding relation, when the terminal performs position updating, the mapping relation between the terminal identifier and the connection information and the terminal position information is updated, and the position server is further used for acquiring the connection information from the terminal or an access gateway of the terminal when the terminal performs position registration or updating.
Preferably, after the position change trajectory described in step S4 is sampled, a filter signal with different attenuation degrees is obtained from the sampled signal through FIR filter calculation, according to a certain rule constraint, a burst signal can be extracted from the filter signal, then a corresponding burst time sequence is obtained, the burst sequence is removed from the original time sequence, a periodic sequence therein is extracted by using a method based on euclidean distance, and finally a random sequence is left.
The invention has the technical effects and advantages that: compared with the prior art, the Wifi-based location fingerprint positioning method provided by the invention has the advantages that the relative location of the Wifi terminal device is calculated by utilizing the acquisition of signals based on the Wifi terminal device, so that a series of track characteristic sequences based on a time axis are obtained, and the relative location of the Wifi device is determined through the sequences. Therefore, the track similarity of the terminal equipment can be judged. Although the accurate position of the equipment in the room can not be accurately judged in the relative position, the track similarity between any two customers can be judged, heavy signal measurement and pre-positioning are avoided, the construction complexity is avoided, the installation workload is reduced, and the required equipment quantity is reduced.
Drawings
FIG. 1 is a control flow chart of a Wifi-based location fingerprint positioning method according to the present invention;
FIG. 2 is a schematic diagram of a location fingerprint positioning method based on Wifi according to the present invention;
fig. 3 is a block diagram of an MAC address acquisition apparatus of a Wifi-based location fingerprint positioning method according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
The invention provides a position fingerprint positioning method based on Wifi as shown in figures 1-3, which comprises the following steps:
step S1: setting wireless Wifi hotspots, at least laying more than 3 wireless Wifi hotspots (2.4G and 5G double-frequency) in a site, and uniformly distributing the installation positions as much as possible based on covering the whole site;
step S2: data interaction, namely acquiring wireless interaction data (including data such as equipment identification Mac addresses, timestamps and signal strength) of all Wifi terminals and the hotspot in a field through a wireless hotspot, collecting peripheral deployed AP MAC addresses, signal strength RSSI and SSID information by installing a sampling APP calling system API through a mobile terminal, attaching a current timestamp, and sending the information to a positioning server; the mobile terminal judges the direction of the mobile terminal through a direction sensor assembled on the mobile terminal, the direction is used as the direction of a user and is simultaneously sent to a positioning server, the wireless AP collects the MAC address of the sampling terminal and the RSSI of the transmitted signal strength, records the timestamp of the collection time and the AP and MAC addresses and sends the timestamp to the positioning server;
step S3: acquiring a position fingerprint, wherein the signal characteristics (signal strength, noise and the like) of each position of a customer in a store relative to all wireless hot spots in the store, which can receive signals of the customer, are different, all the signal characteristics in the position are combined and are called as the position fingerprint, the relative position of the customer in the store can be estimated through the position fingerprint, and if the similarity of the position fingerprints of two customers reaches a certain threshold value, the indoor positions of the two customers can be approximately considered to be the same;
step S4: the method comprises the steps of obtaining a position change track, acquiring a sequence of signal characteristics of a user relative to time at fixed time intervals to obtain a series of position fingerprint sequences of each customer in a store, and analyzing the sequences to obtain the position change track of the customer in the house.
Specifically, after receiving the offline sampling data sent by the mobile terminal and the wireless AP, the positioning server in step S2 averages the sampling values in the same sampling time period, aggregates different information in the same location, and stores the aggregated information in the offline fingerprint database, and the location fingerprint that combines the above information is called a composite fingerprint.
Specifically, the Mac address in step S2, the acquiring device thereof includes a baseband chip, an Mac address transmission module, a GPS positioning module, an Mac address processing module, and an alarm module; the base band chip is connected with the MAC address transmission module, the MAC address transmission module is connected with the MAC address processing module, the MAC address processing module is respectively connected with the GPS positioning module and the alarm module, and the GPS positioning module is connected with the electronic map through a data line; the MAC address processing module comprises a memory chip, an MAC address data analysis module and a trigger module; the storage chip is connected with the MAC address data analysis module, and the MAC address data analysis module is connected with the trigger module; the MAC address data analysis module and the MAC address transmission module; the triggering module is respectively connected with the GPS positioning module and the alarm module.
Specifically, the location server described in step S2 may further have the following characteristics: the connection information is connection information of an access network of a communication opposite terminal of the terminal, or the connection information is connection information of the access network of the terminal, the access network of the communication opposite terminal of the terminal has a corresponding relation, when the terminal performs position updating, the mapping relation between the terminal identifier and the connection information and the terminal position information is updated, and the position server is further used for acquiring the connection information from the terminal or an access gateway of the terminal when the terminal performs position registration or updating.
Specifically, after the position change trajectory described in step S4 is sampled, a filter signal with different attenuation degrees is obtained from the sampled signal through FIR filter calculation, a burst signal can be extracted from the filter signal according to a certain rule constraint, a corresponding burst time sequence is obtained, the burst sequence is removed from the original time sequence, a periodic sequence therein is extracted by using a method based on euclidean distance, and a random sequence is left at last.
Compared with the prior art, the Wifi-based location fingerprint positioning method provided by the invention has the advantages that the relative location of the Wifi terminal device is calculated by utilizing the acquisition of signals based on the Wifi terminal device, so that a series of track characteristic sequences based on a time axis are obtained, and the relative location of the Wifi device is determined through the sequences. Therefore, the track similarity of the terminal equipment can be judged. Although the accurate position of the equipment in the room can not be accurately judged in the relative position, the track similarity between any two customers can be judged, heavy signal measurement and pre-positioning are avoided, the construction complexity is avoided, the installation workload is reduced, and the required equipment quantity is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. A position fingerprint positioning method based on Wifi is characterized in that: the method specifically comprises the following steps:
step S1: setting wireless Wifi hotspots, at least laying more than 3 wireless Wifi hotspots (2.4G and 5G double-frequency) in a site, and uniformly distributing the installation positions as much as possible based on covering the whole site;
step S2: data interaction, namely acquiring wireless interaction data (including data such as equipment identification Mac addresses, timestamps and signal strength) of all Wifi terminals and the hotspot in a field through a wireless hotspot, collecting peripheral deployed AP MAC addresses, signal strength RSSI and SSID information by installing a sampling APP calling system API through a mobile terminal, attaching a current timestamp, and sending the information to a positioning server; the mobile terminal judges the direction of the mobile terminal through a direction sensor assembled on the mobile terminal, the direction is used as the direction of a user and is simultaneously sent to a positioning server, the wireless AP collects the MAC address of the sampling terminal and the RSSI of the transmitted signal strength, records the timestamp of the collection time and the AP and MAC addresses and sends the timestamp to the positioning server;
step S3: acquiring a position fingerprint, wherein the signal characteristics (signal strength, noise and the like) of each position of a customer in a store relative to all wireless hot spots in the store, which can receive signals of the customer, are different, all the signal characteristics in the position are combined and are called as the position fingerprint, the relative position of the customer in the store can be estimated through the position fingerprint, and if the similarity of the position fingerprints of two customers reaches a certain threshold value, the indoor positions of the two customers can be approximately considered to be the same;
step S4: the method comprises the steps of obtaining a position change track, acquiring a sequence of signal characteristics of a user relative to time at fixed time intervals to obtain a series of position fingerprint sequences of each customer in a store, and analyzing the sequences to obtain the position change track of the customer in the house.
2. The Wifi-based location fingerprint positioning method as claimed in claim 1, wherein: after receiving the offline sampling data sent by the mobile terminal and the wireless AP, the positioning server in step S2 averages the sampling values of the same sampling time period, aggregates different information of the same location, and stores the aggregated information in the offline fingerprint database, and the location fingerprint that combines the above information is called a composite fingerprint.
3. The Wifi-based location fingerprint positioning method as claimed in claim 1, wherein: the Mac address in step S2, the acquiring device of which includes a baseband chip, an Mac address transfer module, a GPS positioning module, an Mac address processing module, and an alarm module; the base band chip is connected with the MAC address transmission module, the MAC address transmission module is connected with the MAC address processing module, the MAC address processing module is respectively connected with the GPS positioning module and the alarm module, and the GPS positioning module is connected with the electronic map through a data line; the MAC address processing module comprises a memory chip, an MAC address data analysis module and a trigger module; the storage chip is connected with the MAC address data analysis module, and the MAC address data analysis module is connected with the trigger module; the MAC address data analysis module and the MAC address transmission module; the triggering module is respectively connected with the GPS positioning module and the alarm module.
4. The Wifi-based location fingerprint positioning method as claimed in claim 1, wherein: the location server described in step S2 may also have the following features: the connection information is connection information of an access network of a communication opposite terminal of the terminal, or the connection information is connection information of the access network of the terminal, the access network of the communication opposite terminal of the terminal has a corresponding relation, when the terminal performs position updating, the mapping relation between the terminal identifier and the connection information and the terminal position information is updated, and the position server is further used for acquiring the connection information from the terminal or an access gateway of the terminal when the terminal performs position registration or updating.
5. The Wifi-based location fingerprint positioning method as claimed in claim 1, wherein: after the position change trajectory described in step S4 is sampled, a filter signal with different attenuation degrees is obtained from the sampled signal through FIR filter calculation, a burst signal can be extracted from the filter signal according to certain rule constraint, a corresponding burst time sequence is obtained, the burst sequence is removed from the original time sequence, a periodic sequence therein is extracted by using a method based on euclidean distance, and a random sequence is left at last.
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