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Indoor-outdoor seamless positioning switching method

A seamless positioning and indoor positioning technology, applied in satellite radio beacon positioning system, radio wave measurement system, measurement device, etc., can solve the problems of prone to error switching, high hardware cost, instability, etc., and achieve strong practicability and popularity, high switching accuracy, and the effect of eliminating the ping-pong effect

Active Publication Date: 2017-06-30
BEIJING JIAOTONG UNIV
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  • Description
  • Claims
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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 problems of high hardware cost, prone to wrong switching and instability in the current switching method

Method used

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  • Indoor-outdoor seamless positioning switching method

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Embodiment Construction

[0024] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0025] Such as figure 1 As shown, in the indoor and outdoor seamless positioning switching method disclosed in the present invention, GPS positioning is used for outdoor positioning, Wi-Fi signal fingerprint positioning is used for indoor positioning, and particle filtering is performed on the Wi-Fi signal fingerprint positioning results using motion sensor data. The indoor and outdoor seamless positioning switching method disclosed by the present invention includes the following steps:

[0026] S1. Detect whether GPS pos...

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Abstract

The invention discloses an indoor-outdoor seamless positioning switching method comprising the following steps: S1, whether GPS positioning is available is detected; if GPS positioning is available, outdoor positioning of GPS positioning is used; and if GPS positioning is not available, indoor positioning of Wi-Fi signal fingerprint positioning based on particle filtering is used to get an initial positioning result; S2, GPS satellite signals and indoor Wi-Fi signals are monitored according to the initial positioning result, information carried by a GPS satellite signal and the strength value of a Wi-Fi signal currently received by a mobile terminal are collected, and a motion sensor in the mobile terminal collects the current state of motion of the mobile terminal; and S3, according to the moving track of the mobile terminal predicted by the mobile terminal as well as the information carried by the GPS satellite signal and the strength information of the Wi-Fi signal, the outdoor / indoor change of the environment where the mobile terminal is currently located is judged, and outdoor / indoor positioning switching is carried out. The switching precision is high. The possible ping-pong effect of the existing switching method in the process of switching is eliminated.

Description

technical field [0001] The invention relates to the technical field of wireless positioning. More specifically, it relates to a method for seamless indoor and outdoor positioning switching. Background technique [0002] With the development of human society, people have an increasing demand for location information in many fields, and thus many navigation and positioning systems have been developed. At present, the Global Navigation Satellite System (GNSS), represented by the Global Positioning System (GPS) of the United States and the Beidou Navigation System of China, provides people with high-precision, all-weather positioning services. However, due to the fact that satellite measurement signals are difficult to penetrate buildings, positioning solutions cannot be effectively performed in high-density buildings and indoor environments. However, the vast majority of human activities are carried out indoors, and a variety of indoor positioning technologies have emerged, b...

Claims

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Application Information

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IPC IPC(8): G01S19/48
CPCG01S19/48G01S5/012G01S5/015
Inventor 赵军辉陈锦华
Owner BEIJING JIAOTONG UNIV
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