Indoor fingerprint positioning improvement method based on area division and network topology

A technology of network topology and fingerprint positioning, applied in the field of communication, can solve the problems of low positioning accuracy and matching degree, and achieve the effect of improving indoor positioning accuracy, reducing data, and reducing low matching degree

Inactive Publication Date: 2017-05-17
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of low accuracy and matching degree of indoor wireless positioning in the prior art, the present invention provides a method for applying indoor wireless positioning, which can realize p

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  • Indoor fingerprint positioning improvement method based on area division and network topology
  • Indoor fingerprint positioning improvement method based on area division and network topology
  • Indoor fingerprint positioning improvement method based on area division and network topology

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The method of the present invention is carried out indoors, such as shopping malls, hospitals, conference halls, supermarkets and other places. In such occasions, outdoor GPS positioning is relatively inaccurate. In order to solve the problem of the accuracy of the indoor environment, the method of fingerprint positioning is used Indoor positioning is carried out, and smaller areas are divided in this large area, so that the approximate range of positioning determination is narrowed down. At the same time, the signal strength value is used to divide each small area to determine the signal strength value and establish a one-to-one correspondence with the coordinates. The mapping relationship, and finally use the K-nearest neighbor algorithm to match when matching to make the matching degree higher and improve the positioning accuracy.

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Abstract

The invention discloses an indoor fingerprint positioning improvement method based on area division and a network topology and belongs to the communication technology field. The method comprises the following steps of S1 determining a sampling layout and a system coordinate system; S2 on a off-line acquisition phase, collecting and receiving a signal intensity indication RSSI value at each sampling point; S3 storing the RSSI value at an acquisition point, a MAC address and a coordinate at the acquisition point, and constructing a Radio Map database; S4 collecting the RSSI value at a position to be positioned, and matching a collected signal intensity value and a signal intensity value in the database; and S5 taking a fingerprint which is matched successfully as a position coordinate of a point to be measured. In the method, an area division strategy and a network topology structure are used to construct a network, fingerprint database information accuracy and on-line matching precision are increased, positioning is stable, and the positioning is performed and simultaneously network system stability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of communication, and more specifically relates to an improved indoor fingerprint positioning method based on area division and network topology. Background technique [0002] With the development of communication technology, as a part of mobile communication and personal communication service, location service becomes more and more important. Fingerprint positioning technology is a commonly used technology in location services, which can determine the location of a mobile terminal in a wireless network based on characteristic parameters such as the signal strength of the base station received by the mobile terminal. Since the multipath propagation of the base station signal is dependent on the environment, for each location, the multipath structure of the channel at that location is unique. A specific pattern of multipath signals, such multipath signatures can be used as a "fingerprint" of the location. T...

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Application Information

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IPC IPC(8): H04W4/02H04W28/02H04W64/00H04W84/18G01S5/02
CPCH04W4/021G01S5/02H04W4/025H04W28/021H04W64/00H04W84/18
Inventor 倪晓军胡斌斌
Owner NANJING UNIV OF POSTS & TELECOMM
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