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GNSS and WIFI integrated positioning method and system thereof

A technology combining positioning and positioning methods, applied in positioning, radio wave measurement systems, services based on location information, etc., can solve problems such as low accuracy, uneven distribution, and difficult signal acquisition, achieve high positioning accuracy, overcome the The accuracy is not high, and the effect of overcoming the failure of the positioning error is large

Active Publication Date: 2015-11-18
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The method and system of the present invention have high positioning accuracy, which can not only effectively overcome the problem of large positioning error and failure of existing positioning equipment in the environment where GNSS signals are blocked, but also overcome the low precision of existing indoor positioning reference nodes, Problems of uneven distribution and difficult signal acquisition

Method used

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  • GNSS and WIFI integrated positioning method and system thereof
  • GNSS and WIFI integrated positioning method and system thereof
  • GNSS and WIFI integrated positioning method and system thereof

Examples

Experimental program
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Embodiment 1

[0062] A combined positioning method of GNSS and WIFI, comprising the following steps:

[0063] Among them, in the AP positioning node of the deployed WIFI network, according to whether the AP positioning node knows its own position and the method of obtaining its own position, the AP positioning node is divided into a beacon node, a reference node and an unknown node:

[0064] The beacon node: is an AP positioning node whose own position is known, and occupies a small proportion of network nodes;

[0065] The reference node: a node that cannot determine its own position, obtains its relative position in the WIFI network through adjacent nodes, and then obtains its own position through calculation;

[0066] The unknown node: an AP positioning node in a state of unknown real-time location that cannot obtain a position by itself or obtain a relative position in a WIFI network through a neighbor node;

[0067] The neighbor node: all other AP positioning nodes within the communic...

Embodiment 2

[0096] The system of positioning method as described in embodiment 1 includes GNSS positioning module, auxiliary positioning module, WIFI gateway module and power supply module;

[0097] Described GNSS positioning module: comprise GPS and Beidou (BD) dual-mode receiver module, utilize positioning antenna (GNSS signal antenna) to receive satellite signal and output location information, utilize serial port to communicate with WIFI gateway module;

[0098] The auxiliary positioning module: includes a barometer module and a magnetometer module, the barometer module assists in measuring the height by measuring the atmospheric pressure of the node, and the magnetometer module is used to measure the magnetic field strength in the direction where the AP positioning node is placed, thereby assisting the setting of the measuring device direction, both auxiliary positioning modules pass I 2 The C interface communicates with the WIFI gateway module;

[0099] The WIFI gateway module incl...

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Abstract

The invention relates to a GNSS and WIFI integrated positioning method and a system thereof. According to the method, through combination of at least three beacon nodes located via GNSS location-based service or at least three reference nodes located via WIFI, the relative position information of the current node is calculated, and then the relative position information is uploaded to update the position information with a timestamp in a central server and is broadcasted so as to provide convenience for other nodes to search and use. Mobile equipment indirectly obtains self position information via an RSSI locating mode after receiving the surrounding node position broadcast messages so as to achieve integrated positioning. The integrated positioning mode solves the problem that the position of the WIFI hot spot itself is hard to obtain and has great effects in the aspect of improving positioning precision and strengthening practical usability.

Description

technical field [0001] The invention relates to a GNSS and WIFI combined positioning method and system, belonging to the technical field of multi-sensor data fusion. Background technique [0002] With the rapid development of mobile communication technology, data and multimedia services are also increasing rapidly, and location-based services (LBS) are more and more popular with the public. For outdoor applications such as vehicle positioning systems, LBS will provide road condition information after obtaining vehicle location information in real time, so that drivers can choose routes with light traffic load; and in some complex indoor environments, such as restaurants, warehouses, supermarkets, tunnels, etc. , parking lot, etc., when it is necessary to determine the location information of the mobile terminal holder, facility or item, LBS can also play a great role. It can be seen that the LBS system is increasingly infiltrating people's daily activities, making life more...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04W4/04G01S5/02
CPCG01S5/0268G01S5/0284H04W4/046H04W64/003
Inventor 邢建平张波武华刘洋孙晓婷赵庆涛
Owner SHANDONG UNIV
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