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WLAN positioning and networking method based on signal statistical distribution

A technology of signal statistics and positioning accuracy, applied in specific environment-based services, network planning, transmission systems, etc., can solve problems such as inability to improve positioning accuracy and large manpower and material resources

Inactive Publication Date: 2018-10-02
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When building a location fingerprint database, it is necessary to arrange several wireless access points (AccessPoint, AP) in the target environment, but blindly deploying APs not only consumes a lot of manpower and material resources, but also cannot improve the positioning accuracy

Method used

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  • WLAN positioning and networking method based on signal statistical distribution
  • WLAN positioning and networking method based on signal statistical distribution
  • WLAN positioning and networking method based on signal statistical distribution

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Embodiment Construction

[0077] specific implementation plan

[0078] The present invention will be further described below in conjunction with accompanying drawing.

[0079] A WLAN positioning networking method based on signal statistical distribution provided by the present invention comprises the following steps:

[0080] Step 1. Select the target area to be located.

[0081] Step 2. Determine the positions of all WLAN access points in the target area, and arrange m APs in the target area, that is, AP 1 , AP 2 ,...,AP m .

[0082] Step 3. Determine the positions of all reference points in the target area, and select n RPs in the target area, that is, RP 1 ,RP 2 ,...,RP n .

[0083] Step 4. Calculate the Euclidean distance between the i-th RP and the j-th AP physical space Among them, (x i ,yi) is the location coordinate of the i-th RP, (x j ,y j ) is the location coordinate of the jth AP.

[0084] Step 5. Make the RSS obey the Gaussian distribution, and consider the correlation betwee...

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Abstract

The invention discloses a WLAN positioning and networking method based on signal statistical distribution. The correlation between access points (Access point, AP) is firstly considered, and the probability density function of a signal at a reference point is calculated; then, the probability density function is used to calculate the appearing probabilities of different signal vectors at the reference point, and in combination of the position prior probability of the reference point, the weighting probability of the reference point is calculated; then, the average positioning precision of thereference point is calculated to obtain the average positioning precision of a target area; and finally, a simulated annealing algorithm is used to optimize the AP position in the target area. According to the WLAN positioning and networking method based on signal statistical distribution disclosed in the invention, the AP position can be selected reasonably, and the blindness of AP layout is avoided.

Description

technical field [0001] The invention belongs to indoor positioning technology, and in particular relates to a WLAN positioning networking method based on statistical distribution of signals. Background technique [0002] With the rapid development of wireless communication technology and the widespread popularization of mobile devices, people's demand for location-based services continues to grow, which brings unprecedented development space for location-based services. Nowadays, the outdoor positioning system represented by the Global Positioning System (Global Positioning System, GPS) can realize real-time and reliable outdoor positioning. However, due to the complexity of the indoor environment and the shielding of signals by buildings, the positioning performance of outdoor positioning systems drops sharply indoors, making it difficult to meet people's positioning needs. Therefore, the indoor positioning system has become a research hotspot of many scholars. At present...

Claims

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Application Information

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IPC IPC(8): H04W4/33H04W16/20H04W16/22H04W64/00H04B17/391
CPCH04B17/391H04W4/33H04W16/20H04W16/225H04W64/00H04W64/006
Inventor 周牧李垚鲆王勇杨小龙蒲巧林田增山
Owner CHONGQING UNIV OF POSTS & TELECOMM
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