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Wireless indoor locating method based on access point stability degree

An indoor positioning and access point technology, applied in wireless communication, wireless communication services, electrical components, etc., can solve the problem of not considering the fluctuation range of the sampling data of the access point affected by the environment, and achieve the effect of improving stability and accuracy

Active Publication Date: 2014-07-09
ZHEJIANG UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the deficiency that the existing method does not consider the fluctuation range of the access point sampling data affected by the environment, provide a wireless indoor positioning method based on the stability of the access point, and select a suitable access point for positioning

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  • Wireless indoor locating method based on access point stability degree
  • Wireless indoor locating method based on access point stability degree
  • Wireless indoor locating method based on access point stability degree

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Embodiment Construction

[0049] The present invention will now be explained in detail in conjunction with the embodiments and the accompanying drawings.

[0050] Such as figure 1 As shown, the steps of the wireless indoor positioning method based on the stability of the access point in an embodiment of the present invention are as follows:

[0051] Step 1. Select a sampling point indoors, and conduct 70 offline collections (that is, N=70) through the mobile terminal at the sampling point, and use the RSS data of all access points as RSS data samples.

[0052] Step 2, for each access point, calculate the stability of the access point according to the RSS data collected offline several times.

[0053] The calculation of stability combines the number of occurrences of each access point and the data fluctuation amplitude of the RSS data received by each access point. The specific calculation method is as follows:

[0054] Step 2-1, AP is received at the sampling point i The RSS value of N times is {RS...

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Abstract

The invention discloses a wireless indoor locating method based on an access point stability degree. The method comprises the steps that 1, a sampling point is selected indoors, offline collection is carried out on a mobile terminal N times at the sampling point, and the RSS data of all access points are adopted as RSS data samples; 2, the stability degree of each access point is calculated according to the RSS data obtained through multi-time offline collection; 3, all the access points are ranked from big to small according to the stability degree; 4, the first k access points with the high stability degree are selected, and a fingerprint map database is built for the RSS data received by the selected access points in the RSS data samples; 5, the RSS data received by a position to be detected in real time are matched with the RSS data in the fingerprint map database, and therefore locating is achieved. According to the method, the influence of the environment on locating errors can be reduced, and the locating stability and precision are improved.

Description

technical field [0001] The invention relates to the field of computer wireless networks, in particular to a wireless indoor positioning method based on the stability of access points. Background technique [0002] At present, the WLAN indoor positioning technology based on fingerprints usually needs to select the access point, which mainly uses the correlation characteristics of the received signal strength (RSS) of the wireless signal and the physical location to combine the positioning information with the WiFi wireless data collected at the location of the sampling point. Signal data for matching mapping. The fingerprint-based positioning technology mainly extracts positioning features through the fingerprint database. During actual positioning, a set of RSS values ​​received in real time at the location to be tested is uploaded to the positioning server, and the most matching set of RSS values ​​is found in the fingerprint database. The RSS value of one or several locat...

Claims

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Application Information

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IPC IPC(8): H04W4/04H04W24/02
Inventor 王勇超沈阳邢卫江肖强徐赵诚
Owner ZHEJIANG UNIV
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