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Position fingerprint updating method and device for wireless positioning

A wireless positioning and update method technology, applied in the field of wireless positioning, can solve problems affecting positioning accuracy, etc., and achieve the effect of reducing maintenance complexity, reducing impact, and ensuring accuracy

Inactive Publication Date: 2016-12-07
SIEMENS AG
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Problems solved by technology

[0005] However, considering that the WiFi signal is unstable, and the wireless propagation environment in the positioning area may change from time to time, for example, the propagation path of the wireless signal changes due to the change of the building layout, if a predetermined (such as Location fingerprints obtained through pre-training may affect the accuracy of positioning

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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

[0021] now refer to figure 1 , which shows a schematic architecture diagram of a wireless positioning system used in an embodiment of the present invention. Such as 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.

[0022] 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 .

[0023] 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 ac...

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Abstract

The invention provides a position fingerprint updating method and device for wireless positioning. Self-adaptive position fingerprint adjusting is realized to ensure the accuracy of positioning. The method comprises the steps that rounds of voting is carried out based on the signal receiving strength indication, which is detected by a user terminal, of a number of access points; in each round of voting, based on the signal receiving strength indication of a part of access points in a number of access points and the signal receiving strength indication, which is detected at a number of reference positions in advance, of a part of access points, the similarity degree of the position of the user terminal and each reference position is calculated; and if the similarity degree of the position of the user terminal and a reference position is greater than a set threshold value, the position fingerprint at the reference position is updated by using the signal receiving strength indication, which is detected by the user terminal, of the access points other than a part of access points in a number of access points.

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): G01S5/02
Inventor 梁栋王超孙芃
Owner SIEMENS AG
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