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Wi-Fi (Wireless Fidelity)-based indoor positioning system and method

An indoor positioning and positioning system technology, applied in the field of Wi-Fi-based indoor positioning systems, can solve problems such as average deviation and poor positioning accuracy, and achieve the effect of improving accuracy

Active Publication Date: 2013-11-20
北京可信金科信息技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to random interference, when some of the selected K reference points have large deviations, the overall average value will have a large deviation, resulting in poor positioning accuracy.

Method used

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  • Wi-Fi (Wireless Fidelity)-based indoor positioning system and method
  • Wi-Fi (Wireless Fidelity)-based indoor positioning system and method

Examples

Experimental program
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Embodiment

[0029] Embodiment: Wi-Fi-based indoor positioning system (such as figure 1 shown), including a local area network, a positioning server, and a mobile terminal to be positioned, wherein the positioning server is connected to the local area network, and several first wireless APs are set in the indoor building structure, and the first wireless AP provides the function of transmitting and receiving wireless signals , the positioning server does not need to know the position of the first wireless AP; the positioning system further includes a plurality of second wireless APs with known positions, and the position information of the plurality of second wireless APs is stored in the positioning server, The positioning system uses the second wireless AP to locate the mobile terminal, and uses the second wireless AP to correct the positioning result. The positioning server includes an indoor building structure diagram and a distribution diagram of each second wireless AP fixed point. ...

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PUM

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Abstract

The invention discloses a Wi-Fi (Wireless Fidelity)-based indoor positioning system and a Wi-Fi (Wireless Fidelity)-based indoor positioning method. The positioning system comprises a positioning server, a local area network, a plurality of first wireless APs (Access Points), a plurality of known-position second wireless APs and a mobile terminal to be positioned. According to the system, the first wireless APs are adopted to position the mobile terminal, and the second wireless APs are used for amending a positioned result; according to an amending method, the existing K nearest neighbor (KNN) points obtained by a KNN method are subjected to selection, distances from the mobile terminal to be positioned to the wireless APs of fixed positions are obtained by adopting an RSSI (Received Signal Strength Indicator) ranging manner, and the KNN points are selected by using the distances. The system and the method have the advantages that the adopted APs of the fixed positions have the maximum received signal strength and are less affected by environmental factors, such as wall bodies, so that the measurement error is reduced, and the positioning is more accurate.

Description

technical field [0001] The present invention relates to the field of wireless positioning, in particular to a Wi-Fi-based indoor positioning system and method. Background technique [0002] With the rapid increase of data services and multimedia services, people's demand for positioning and navigation is increasing, especially in complex indoor environments, such as airport halls, exhibition halls, warehouses, supermarkets, libraries, underground parking lots, mines, etc. , it is often necessary to determine the location information of the mobile terminal or its holder, facilities and objects indoors. However, limited by conditions such as positioning time, positioning accuracy, and complex indoor environments, relatively complete positioning technologies cannot be well utilized at present. [0003] The Global Positioning System (GPS) is the most common way to obtain location information in the outdoor environment. However, because satellite signals are easily blocked by va...

Claims

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Application Information

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IPC IPC(8): H04W64/00G01S5/02
Inventor 张斌赵晖
Owner 北京可信金科信息技术有限公司
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