Seamless indoor and outdoor positioning switching method

A technology of seamless positioning and positioning methods, applied in wireless communication, advanced technology, electrical components, etc., can solve the problems of excessive power consumption of WIFI and GNSS modules, and achieve the effect of avoiding excessive power consumption

Inactive Publication Date: 2014-01-15
BEIHANG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an indoor and outdoor seamless positioning switching method to solve the problem of excessive power consumption caused by the continuous operation of both WIFI and GNSS modules in the existing seamless positioning switching method

Method used

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  • Seamless indoor and outdoor positioning switching method
  • Seamless indoor and outdoor positioning switching method
  • Seamless indoor and outdoor positioning switching method

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Embodiment Construction

[0105] See figure 1 , figure 2 , image 3 , The present invention mainly adopts the method of the light sensor and the indoor AP set matching to detect indoor and outdoor environment changes. On the one hand, the luminous flux of artificial light sources is smaller than that of outdoor natural light sources. At present, most smart terminals are equipped with light sensors. By detecting changes in luminous flux, it is possible to distinguish indoor and outdoor environmental changes in most scenes during the day. On the other hand, the AP set received by the WIFI device can be matched with the pre-measured indoor inherent AP set. If the matching coefficient changes beyond a certain threshold, the user is considered to have changed indoor and outdoor environments.

[0106] When the user moves from outdoor to indoor, the luminous flux drops steeply from 1000 Lux to 60 Lux, and the matching coefficient of the AP set also drops from 10 to -10, and the amount of change exceeds the predi...

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Abstract

A seamless indoor and outdoor positioning switching method comprises the steps as follows: I, a perception layer L1 is used for detecting scene changes and changes in needs of users, and reporting to a switching module; 2, an algorithm layer L2 reports the current algorithm to the switching module; 3, the algorithm layer L2 gives a notice to a hardware layer L3 to open a hardware module; 4, a data layer L4 feeds new measured positioning data back to the L2 to judge whether a candidate positioning algorithm can be used or not, if yes, the candidate positioning algorithm is reported to the switching module, and if the algorithm after switching cannot be used for positioning yet, another predetermined candidate positioning algorithm is selected again until the algorithm after switching can be used; 5, when the switching module continuously receives the instruction that the current algorithm cannot be used and receives the instruction that the candidate positioning algorithm can be used during a window time period, the L2 is notified to perform algorithm switching, and meanwhile, the MEMS positioning technology is closed, and the candidate positioning algorithm is used for positioning; 6, after switching of the L2 is completed, the L3 is notified to close unnecessary hardware modules. According to the invention, the terminal electric quantity can be saved, and maintenance and standardization are facilitated.

Description

Technical field [0001] The present invention provides an indoor and outdoor seamless positioning switching method, specifically a method for seamless switching between wireless transmission technology (WIFI) indoor positioning and global satellite navigation system (GNSS) outdoor positioning methods. The method can adaptively switch between software and hardware by detecting environmental changes, and belongs to the technical field of wireless transmission and navigation. Background technique [0002] With the development of human society, people have an increasing demand for their own location information, and thus many navigation and positioning systems have been developed. The Global Navigation Satellite System (GNSS) provides people with high-precision, all-weather positioning services. However, due to the feature that its measurement signals cannot penetrate buildings, GNSS positioning services cannot be effectively performed in high-density building areas and indoors. In o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/18H04W52/02
CPCY02D30/70
Inventor 杨东凯杜元锋修春娣刘源孙智强
Owner BEIHANG UNIV
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