Position fingerprint updating method and device for wireless positioning

A technology of wireless positioning and updating method, applied in wireless communication, electrical components and other directions, can solve the problems of unstable WiFi signal and affect positioning accuracy, and achieve the effect of reducing maintenance complexity and ensuring accuracy

Inactive Publication Date: 2016-12-07
SIEMENS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, considering that the WiFi signal is unstable, and the access point (AP) used for positioning and its location may change from time to time, if a predetermined (for example, obtained through pre-training) location fingerprint is always used for positioning , which may affect the positioning accuracy

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  • Position fingerprint updating method and device for wireless positioning
  • Position fingerprint updating method and device for wireless positioning
  • Position fingerprint updating method and device for wireless positioning

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Embodiment Construction

[0023] now refer to figure 1 , which shows a schematic architecture diagram of a wireless positioning system used in an embodiment of the present invention. like figure 1 As shown, the positioning system 10 may include four access points (AP: AccessPoint) 20A to 20D, a smart phone 30 for training, a smart phone 40 carried by a user, and a server 50 to locate an area A.

[0024] Area A can be divided into sixteen identical grids, and the center point of each grid is used as a reference position R for positioning, thereby having sixteen reference positions R in area A 1 -R 16 .

[0025] The access points 20A to 20D may be located at different positions in or around the area A, wherein the access points 20A, 20B, and 20C are pre-arranged backbone access points whose positions are known and fixed; The other access points, whose positions are learned during the training phase. The access points 20A to 20D all have WiFi transmitters, and after being activated, each of the acces...

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Abstract

The embodiment of the invention provides a position fingerprint updating method and a device for wireless positioning. The method comprises steps: according to a received signal strength indicator of multiple trunk access points detected by a to-be-updated access point, the to-be-updated access point is positioned; and if the positioning result of the to-be-updated access point is different from the preset position of the to-be-updated access point, a position fingerprint of the to-be-updated access point is deleted, wherein the position fingerprint comprises the received signal strength indicators of the to-be-updated access point detected at multiple reference positions in advance. By adopting the method and the device of the embodiment of the invention, the position fingerprint can reflect the access point for positioning and changes of the position, and the positioning accuracy is ensured.

Description

technical field [0001] The invention relates to the field of wireless positioning, in particular to a location fingerprint update method and device for wireless positioning. Background technique [0002] Typically, positioning is performed using a Global Positioning System (GPS) based scheme. However, positioning accuracy is poor indoors using GPS-based schemes because the signal from satellites is too weak to penetrate most buildings. [0003] At present, some technical solutions for indoor positioning have been proposed, such as the indoor positioning system proposed by the US patent application US2010134356A1. These technical solutions for indoor positioning usually require users to carry special equipment (such as electronic tags) required for positioning. . [0004] Document 1 (Lu Henghui, Liu Xingchuan, Zhang Chao, Lin Xiaolian, Shenzhen Graduate School of Tsinghua University, Comparison of WiFi Positioning Based on Triangle and Position Fingerprint Recognition Algor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
Inventor 梁栋王超孙芃
Owner SIEMENS AG
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