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Rapid establishing and dynamic updating system and method for WLAN position fingerprint database

A dynamic update, database technology, applied in radio wave measurement systems, measurement devices, navigation through speed/acceleration measurement, etc., can solve the problem of insufficient positioning effect and continuity

Active Publication Date: 2016-05-18
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
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AI Technical Summary

Problems solved by technology

The indoor signal propagation model positioning technology based on WLAN has relatively stable positioning accuracy, but the positioning effect and continuity are not as good as MEMS

Method used

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  • Rapid establishing and dynamic updating system and method for WLAN position fingerprint database
  • Rapid establishing and dynamic updating system and method for WLAN position fingerprint database
  • Rapid establishing and dynamic updating system and method for WLAN position fingerprint database

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Embodiment Construction

[0058] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0059] like figure 1 and figure 2 As shown, the WLAN location fingerprint database of the present invention is quickly established and the dynamic update system includes an extended Kalman filter module 3, a MEMS positioning module 2, a WLAN signal propagation model location estimation module 1, a map matching module 4 and a WLAN location fingerprint database Build and update module 5 dynamically.

[0060] The MEMS positioning module 2 includes a processor, and an accelerometer, a gyroscope, and a magnetometer that are respectively connected to the processor, and the processor calculates the user speed and the user's heading according to the information output by the accelerometer, the gyroscope, and the magnetometer; The information collected by the accelerometer calculates the user's speed, and uses the information collected by various sensors to p...

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Abstract

The invention discloses a rapid establishing and dynamic updating system and a method for a WLAN position fingerprint database. According to the method, the extended Kalman fusion filtering algorithm is mainly designed, available information of an MEMS sensor and an indoor signal transmission model are fully used, high-precision two-dimensional position solution is realized, the optimal estimation outputted by an extended Kalman filter is corrected by employing known indoor map information, and final position information is obtained; and the WLAN position fingerprint database can be rapidly established and updated with the combination of the obtained position information and RSSI information collected at the current moment. According to the system and the method, the problem of reduced positioning precision due to big change of the WLAN position fingerprint database with the change of time is solved, and the time cost and the manpower cost of the conventional point-to-point acquisition method for establishing and updating the WLAN position fingerprint database are effectively reduced.

Description

technical field [0001] The invention belongs to the mobile communication technology, and in particular relates to a system and method for quickly establishing and dynamically updating a WLAN location fingerprint database. Background technique [0002] In the field of mobile communications, people are increasingly demanding location-based services (Location Based Services, LBS), and with the large-scale deployment and popularization of wireless local area networks (Wireless Local Area Networks, WLAN) in indoor environments, WLAN-based indoor positioning The system is an emerging research hotspot that caters to this need. [0003] In the WLAN positioning system, the positioning method based on location fingerprint has high accuracy and does not need to add additional equipment, so it has been widely used. The positioning method based on location fingerprint is divided into two phases: offline phase and online phase. In the offline phase, a location fingerprint database is es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/06G01C21/18G01C21/08
CPCG01C21/08G01C21/18G01S11/06
Inventor 田增山吴自鹏金悦李泽周牧张振源郭建川林天瑜张千坤王嘉诚
Owner CHONGQING UNIV OF POSTS & TELECOMM
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