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A method to eliminate the ambiguity of wireless fingerprint map

A fingerprint map and ambiguity technology, which is applied in the field of positioning services, can solve problems such as serious trajectory ambiguity, wireless fingerprint ambiguity, and restricting the widespread deployment of systems, so as to eliminate trajectory ambiguity, eliminate ambiguity, Effect of improving track utilization

Active Publication Date: 2020-08-25
河北知微科技有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing crowd sensing methods are limited by the diversity of equipment and the precision constraints of commercial equipment, and there are serious problems of trajectory ambiguity and wireless fingerprint ambiguity, which seriously restrict the wide deployment of the system.

Method used

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  • A method to eliminate the ambiguity of wireless fingerprint map
  • A method to eliminate the ambiguity of wireless fingerprint map
  • A method to eliminate the ambiguity of wireless fingerprint map

Examples

Experimental program
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Embodiment 1

[0071] see Figure 1-12 , in an embodiment of the present invention, a method for eliminating wireless fingerprints Figure II A meaningful method, including the following steps:

[0072] S1, determine the minimum sampling period of the mobile terminal, and collect the inertial sensor data and RSSI data of the mobile terminal. Since the user's equipment has different sampling frequencies (caused by firmware and hardware), it is necessary to consider the sampling of inertial navigation data and Wi-Fi data. The frequency difference, because the minimum sampling frequency of the mobile terminal is not known in advance, so in the initial sampling, high-frequency sampling will be performed for up to 10s, and the minimum sampling period t of the device will be determined by detecting the time difference between two different sampling results. Then the sampling period T should conform to the following formula:

[0073] T=min(n)*t;

[0074] s.t.n*t>3, n=1,2,3...;

[0075] In the fo...

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Abstract

The invention discloses a method for eliminating the ambiguity of a wireless fingerprint map, which relates to the technical field of positioning services, and comprises the following steps: S1, determining the minimum sampling period of a mobile terminal, and collecting inertial sensor data and RSSI data of the mobile terminal; S2, passing Particle filter converts inertial sensor data into logical trajectory and its end point set; S3, the end point set is divided into A, B, and C types according to the weight, and correspondingly forms A, B, and C type trajectory clusters: S4, the obtained A , B, and C-type trajectory clusters form a queue; S5, eliminate fingerprint ambiguity, and generate indoor wireless fingerprint maps. The use of short trajectories not only improves the efficiency of data usage by improving the utilization rate of trajectories, but also makes up for the insufficient amount of data caused by low-frequency sampling.

Description

technical field [0001] The invention relates to the technical field of positioning services, in particular to a wireless fingerprint elimination method Figure II righteous method. Background technique [0002] With the rise of the Internet of Things, the wave of Internet of Everything is sweeping the world. As a key application of the Internet of Things, location-based services (Location-based Service, LBS) are receiving more and more attention. Compared with mature outdoor positioning technology, indoor positioning technology has also received considerable attention. On the one hand, in large indoor spaces (underground parking lots, airports, stations, etc.), there is an increasing demand for location-based services; on the other hand, location-based advertising and marketing, precision services also show a broad market for this service . In recent years, with the development of artificial intelligence, unmanned services have become common practice. Obtaining the real-t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/029H04B17/318G06K9/62
CPCH04W4/029H04B17/318G06F18/22
Inventor 王林刘文远李帅汪建华
Owner 河北知微科技有限公司
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