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WIFI (Wireless Fidelity) positioning method and positioning system thereof

A positioning method and positioning system technology, applied in the direction of location information-based services, electrical components, wireless communications, etc., can solve the problems of insufficient consideration of dynamic changes in positioning information, insufficient use of historical data, and insufficient indoor signal processing. Achieve the effects of convenient deployment of reference points, reduction of fluctuations, and data transmission efficiency

Inactive Publication Date: 2012-08-15
BEIJING INFORMATION SCI & TECH UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the general WIFI positioning system has the problem of low accuracy. The main reasons are as follows: 1. Since the number of access points is deployed according to the requirements of communication, if viewed according to the requirements of positioning, the number of access points Low deployment density
2. The historical data of the positioning process is not fully utilized, and the dynamic changes of positioning information are not fully considered
3. The transmission of indoor signals is affected by many factors, and the positioning algorithm is not perfect for indoor signal processing
Therefore, WIFI positioning cannot be used in occasions that require higher precision, such as robot mobile positioning

Method used

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  • WIFI (Wireless Fidelity) positioning method and positioning system thereof
  • WIFI (Wireless Fidelity) positioning method and positioning system thereof
  • WIFI (Wireless Fidelity) positioning method and positioning system thereof

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Embodiment Construction

[0014] The present invention realizes the improvement of the positioning accuracy through on-demand deployment and dynamic evolution. The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] Such as figure 1 As shown, the WIFI positioning system based on WIFI data communication provided by the present invention adopts a centralized processing method, which includes more than three access points AP of wireless networks, several mobile units MU that need to be positioned, more than one dynamic label TAG, one The central server LOC and a database DB, each access point AP and each dynamic label TAG are reference points, and each mobile unit MU is a point to be positioned. Among them, only one access point AP is used for data transmission. Take three access points AP, one mobile unit MU and one dynamic label TAG as an example below.

[0016] The three access points AP and the dynamic tag TAG are respectively ...

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Abstract

The invention relates to a WIFI (Wireless Fidelity) positioning method and a positioning system thereof. The WIFI positioning method comprises the following steps of: arranging a WIFI positioning system comprising an access point, a dynamic label, a mobile unit, a center server and a database; generating each AP (access point) signal radio map of a reference system, and storing a database (DB); generating a newly-added TAG signal radio map of the reference system, and storing into the database (DB); on a mobile unit (MU), sampling each reference point signal SS of the reference system; according to the historical data of a sampling signal, carrying out iteration smooth filtering; on a center server LOC (Lines of Communication), obtaining the signal radio map of each reference system of the collected signal; according to an optimal algorithm, obtaining the geometric position of the sampling point; on the mobile unit (MU), finishing Kalman filtering to a moving object; and at the idle time of the center server LOC, finishing evaluating and updating the TAG position. According to the WIFI positioning method, the positioning precision of the whole positioning system can be improved so as to consider the data transmission efficiency and reliable positioning. The WIFI positioning method can be widely applied to the wireless positioning field.

Description

technical field [0001] The invention relates to a wireless positioning method and a positioning system, in particular to a WIFI positioning method and a positioning system suitable for robot mobile positioning and other occasions requiring high positioning accuracy. Background technique [0002] At present, WIFI is a wireless data communication method and has been widely used. WIFI positioning also appears along with the data communication network. In a WIFI network, the fixed location of the access point is used as a reference, and the location of the mobile device can be determined according to information such as signal strength between sending and receiving devices. WIFI positioning is especially suitable for indoor positioning, while GPS positioning is suitable for outdoor positioning. The powerful combination of the two methods expands the application range of wireless positioning technology. However, the general WIFI positioning system has the problem of low accurac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W84/12
Inventor 乔道鄂徐小力
Owner BEIJING INFORMATION SCI & TECH UNIV
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