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Target wireless self-positioning method based on group information

A group information, self-positioning technology, applied in positioning, wireless communication, radio wave measurement system and other directions, can solve problems such as underutilization of useful information and errors

Pending Publication Date: 2021-06-18
WUXI ELECTRONICS & INSTR IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods only use the connectivity or hop information in the non-ranging algorithm to locate, but do not make full use of the useful information such as the density of neighbor nodes or the total number of nodes in the area, which can be obtained at the initial stage of positioning.
[0006] In addition, the traditional measurement method based on the number of hops is to express the hop distance of the neighbor nodes within the communication radius r of a certain node as a hop distance, that is, the hop distance value is 1, no matter the actual distance between nodes is 1m or 5m, the estimated distance values ​​calculated by the jump distance information are all the same, which obviously has a large error
In addition, when a path has a large jump value or a large turning point, it will cause a large cumulative error

Method used

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  • Target wireless self-positioning method based on group information
  • Target wireless self-positioning method based on group information
  • Target wireless self-positioning method based on group information

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Embodiment Construction

[0019] In the wireless distributed network, it can be seen that if two adjacent wireless nodes are very close, the number of their common neighbor nodes will be more, and on the contrary, the farther the distance is, the less the number of identical nodes will be. Draw a path Path(s i ,s k ). Draw two circles with the communication radius r of node i and node k as the radius. These two circles must have a common area, and the area must contain node j. The common area of ​​the two circles is

[0020]

[0021] Deriving formula (1) to get (2), so S and d ik Inversely proportional.

[0022]

[0023] In addition, the positions of the nodes are randomly deployed, so the number of the same neighbor nodes in the common area of ​​the two circles is a random variable, so the larger the area S, the more the number of nodes falling into S, d ik the smaller, that is, d ik Inversely proportional to the number of same neighbor nodes.

[0024] Based on this phenomenon, the present...

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Abstract

The invention discloses a group information-based target wireless self-positioning method, and the method comprises the following steps: collecting information of neighbor beacon nodes, and solving the average hop distance of the whole network; further reducing the areas of the nodes in the triangles by adopting a method based on median line segmentation, and obtaining the overlapped areas of the triangles; calculating coordinate values of nodes meeting iteration conditions; and after the unknown node has enough distance values, a trilateral positioning method is adopted to calculate the target position. The method has the advantage that the positioning precision can be improved.

Description

technical field [0001] The invention relates to base station information collection and positioning technology. Background technique [0002] At present, wireless positioning technology is more and more widely used, especially wireless distributed sensor network positioning technology has received more and more attention from all walks of life. In different environments, in order to monitor comprehensively, a large number of nodes are usually applied, such as the "tropical tree" system during the Vietnam War, where nodes are scattered in forest areas by aircraft. Therefore, it is particularly important for the sensor to obtain its own position information. Most of the data without location information has no practical value. The accuracy of location information is related to the efficiency of network data operation. Compared with GPS and Beidou positioning, this technology has the characteristics of good concealment, low cost, automatic deployment, not affected by high-ri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/02
CPCH04W64/00G01S5/02
Inventor 花小峰黄镓辉任锦标俞文忠
Owner WUXI ELECTRONICS & INSTR IND