Automatic updating method of fingerprint database in WiFi indoor positioning system

An indoor positioning and automatic update technology, applied in the field of WiFi indoor positioning, can solve problems such as fingerprint library failure, and achieve the effect of reducing manpower

Inactive Publication Date: 2017-05-31
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an automatic update method of the fingerprint library in the WiFi indoor positioning system, which can automatically update the fingerprint library with a light load on the mobile terminal to solve the problem of invalidation of the fingerprint library caused by environmental changes , while saving the manpower and financial resources required for updating the fingerprint database, as well as the occupancy of system resources on mobile devices

Method used

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  • Automatic updating method of fingerprint database in WiFi indoor positioning system
  • Automatic updating method of fingerprint database in WiFi indoor positioning system

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Embodiment Construction

[0041] Such as figure 1 , 2 Shown as an example, the implementation steps of the present invention are described:

[0042] Step 1: Deploy APs with data return function in the area to be located, and ensure that there is at least one AP every 30 meters, so that all APs can cover the entire positioning area;

[0043] Step 2: Rasterize the positioning area, select the reference point and record the position coordinates of the reference point, use the standard equipment H at the reference point c Collect information such as signal strength RSSI and MAC address of surrounding APs, and build an initial signal characteristic table S c ;

[0044] Among them, the initial signal characteristic table S c Including a list of signal strengths of surrounding APs collected by standard positioning equipment at the reference point within a period of time (3 minutes):

[0045] reference point number Scan time MAC address of the AP signal strength 1 T1 MAC1 RSSI1 ...

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Abstract

The invention discloses an automatic updating method of a fingerprint database in a WiFi indoor positioning system and belongs to the field of WiFi indoor positioning. The method comprises specific steps as follows: an AP (access point) with a data postback function is set, an initial signal feature list is established, static state recognition is performed on observation equipment, signal difference between the observation equipment and standard equipment is rejected, a partial updated fingerprint database is established, a residual updated fingerprint database is established, and the updated fingerprint database is combined. By means of the method, the labor and financial costs for fingerprint database updating are greatly saved, light load of a mobile terminal is realized, and the fingerprint database can be automatically and accurately updated when the indoor environment changes.

Description

technical field [0001] The invention belongs to the field of WiFi indoor positioning, and more specifically relates to a method for automatically updating a fingerprint library in a WiFi indoor positioning system. Background technique [0002] In recent years, location-based services (LBS) have provided more and more conveniences to people, and related positioning technologies have also developed rapidly. The global satellite navigation system (GNSS) can provide meter-level positioning services in open environments, but in indoor environments, GNSS cannot be used for indoor positioning due to the obstruction of signals by buildings. Therefore, positioning technologies based on signals such as WiFi, RFID, and sound waves in indoor environments have been developed. [0003] With the popularity of WiFi hotspots and the widespread use of smart phones, WiFi indoor positioning systems have received more and more attention. In the WiFi indoor positioning system, the fingerprint p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/04G06F17/30H04W84/12
CPCH04W4/04G06F16/23H04W84/12
Inventor 诸彤宇盖群郭之超
Owner BEIHANG UNIV
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