A kind of GNSS and wifi combined positioning method and system

A technology that combines positioning and positioning methods, applied in positioning, radio wave measurement systems, services based on location information, etc. High positioning accuracy, overcoming the effect of large positioning error leading to failure

Active Publication Date: 2018-08-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of GNSS and wifi combined positioning method and system
  • A kind of GNSS and wifi combined positioning method and system
  • A kind of GNSS and wifi combined positioning method and system

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Experimental program
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Embodiment 1

[0062] A kind of GNSS and WIFI combination positioning method, comprises steps as follows:

[0063] Among the AP positioning nodes of the deployed WIFI network, according to whether the AP positioning node knows its own position and the way to obtain its own position, the AP positioning nodes are divided into beacon nodes, reference nodes and unknown nodes:

[0064] The beacon node: is an AP positioning node whose location is known, and occupies a very small proportion in the network nodes;

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

[0066] The unknown node: is an AP positioning node in a real-time position unknown state that cannot obtain the position by itself, nor obtain the relative position in the WIFI network through neighbor nodes;

[0067] The neighbor nodes mentioned above are all other AP positionin...

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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PUM

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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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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W4/33G01S5/02
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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