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Mobile equipment positioning method in WALN (wireless local area netork)/Bluetooth heterogeneous network environment

A technology for heterogeneous networks and mobile devices, applied in electrical components, wireless communications, etc., can solve problems such as the decline of positioning accuracy, and achieve the effect of reducing the number of signals, improving positioning accuracy, and reducing the amount of calculation.

Active Publication Date: 2017-05-31
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and propose a mobile device positioning method in a WLAN / Bluetooth heterogeneous network environment, which can better solve the problem of signal strength in the traditional location fingerprint positioning method in a heterogeneous network. The problem of decreased positioning accuracy when changing randomly, improve positioning accuracy

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  • Mobile equipment positioning method in WALN (wireless local area netork)/Bluetooth heterogeneous network environment
  • Mobile equipment positioning method in WALN (wireless local area netork)/Bluetooth heterogeneous network environment
  • Mobile equipment positioning method in WALN (wireless local area netork)/Bluetooth heterogeneous network environment

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Embodiment Construction

[0035] The present invention will be further described in detail in conjunction with the accompanying drawings.

[0036] When the present invention performs target positioning in a network environment where WLAN and Bluetooth wireless signals can be received, Bayesian functions are used in the fingerprint database collection stage to describe the location fingerprint characteristics of signal strength, and simplified The posterior probability matching algorithm is used to obtain the reference position, and finally the reference position is weighted and averaged to obtain the positioning result.

[0037] In the following description, the unit of length is meter and the unit of time is second.

[0038] Offline sampling stage:

[0039] 1) The positioning area is a rectangular area of ​​18m×12m, and a fingerprint sampling grid point is set every 2m, a total of 70 fingerprint sampling grid points, such as figure 1 shown;

[0040] 2) Use signal strength detection equipment to sam...

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Abstract

The invention discloses a mobile equipment positioning method in the WALN (wireless local area netork) / Bluetooth heterogeneous network environment. The method includes: firstly, generating a location fingerprint database of a positioning area; after positioning equipment enters the positioning area, measuring signal intensity of a signal source capable of being received at the position; selecting m WALN signals and n Bluetooth signals with the largest signal intensity; using a posterior probability matching algorithm to calculate posterior probability of signal intensity values of the signals in signal intensity Bayesian distribution of the location fingerprint database. The WALN and Bluetooth signals in the environment are utilized, a location fingerprint positioning method is combined, signal location fingerprint characteristics are described by using Bayes function, location fingerprint matching is performed by using the posterior probability matching algorithm, and a target estimation location is finally obtained with a posterior probability weighted processing algorithm; positioning precision of the mobile equipment in the WALN / Bluetooth heterogeneous network environment is improved, and the existing Bayes function based posterior probability matching algorithm is simplified.

Description

technical field [0001] The invention belongs to the field of mobile wireless network communication, and in particular relates to a mobile phone positioning method which integrates WLAN and bluetooth wireless signals. Background technique [0002] With the rapid development of information technology, there is an increasing demand for Location Based Services (LBS) in indoor environments covered by wireless networks, and a convenient, efficient, and humanized lifestyle has become the direction people are pursuing. The radio standards of WLAN (Wireless Local Area Networks, wireless local area network) are IEEE802.11a / b / g, and the working distance is up to 150m. The huge potential and broad application prospects of these materials have generated great attention and research enthusiasm. It has a longer working distance and a faster transmission rate, and can effectively cover various large indoor areas. Moreover, the indoor positioning system based on WLAN can be realized by sof...

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Application Information

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IPC IPC(8): H04W64/00
CPCH04W64/00
Inventor 陆音杜恒
Owner NANJING UNIV OF POSTS & TELECOMM
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