Similarity based wireless sensor network mobile node positioning method

A wireless sensor and mobile node technology, applied in network topology, wireless communication, wireless communication services, etc., can solve the problem of low positioning accuracy, achieve high positioning accuracy, strong anti-interference, and low computational complexity

Inactive Publication Date: 2013-05-22
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a wireless sensor network mobile node positioning method based on similarity, in order to solve the problem that the existing RSSI positioning method is easily affected by uncertain factors in the environment and has low positioning accuracy

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  • Similarity based wireless sensor network mobile node positioning method
  • Similarity based wireless sensor network mobile node positioning method
  • Similarity based wireless sensor network mobile node positioning method

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] The positioning method of the present invention should include a step of determining the path loss index when the path loss index is unknown, and the path loss index can be obtained through experiments.

[0023] The following is the application of the present invention in the greenhouse environment, that is, the similarity-based wireless sensor network mobile node positioning method suitable for the greenhouse environment.

[0024] Suppose a group of wireless sensor nodes S={S i |i=1,...,m} are deployed in a two-dimensional rectangular greenhouse area (a×b), and each node is an isomorphic node with the same communication radius R (R is greater than the diagonal L of the area). Establish a coordinate system with the upper left corner vertex as the coordinate origin, and the first n nodes S i (x i ,y i )(1≤i≤n) pre-acquires its own position, called a...

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Abstract

The invention relates to a similarity based wireless sensor network mobile node positioning method. The method includes the steps: after anchor node deployment is finished, each anchor node uploads a data package including self node ID (identity) and position to a sink node, and the sink node collects the data packages of the anchor nodes to establish a digital link list; according to anchor distribution information in the digital link list, the sink node performs virtual grid division for a greenhouse and returns to a coordinate of grid vertexes except for those outside a zone boundary; the sink node collects a group of RSSI (radio signal strength indication) values of communication of mobile nodes with the anchor nodes and coverts the values into distance vector by the aid of a simplified lognormal shadow model; similarity among the distance values corresponding to the mobile nodes and the grid vertexes except for those outside the zone boundary is computed through a similarity function; and a centroid of a zone enclosed by a grid vertex set with the highest similarity serves as an estimated coordinate of the mobile nodes. The method is accurate in estimation of mobile node coordinates, low in computation complexity, perfect, and excellent in positioning performance.

Description

technical field [0001] The invention relates to a wireless sensor network mobile node positioning method based on similarity, in particular to a greenhouse wireless sensor network. Background technique [0002] Location service is an important basic function and an important condition for applications in wireless sensor networks. The location information of nodes is very important for wireless sensor networks. The location where events occur or the location of sensor nodes that obtain information The key content included, monitoring data without location information is often meaningless. At present, the area of ​​facility agricultural greenhouses is generally several hundred to thousands of square meters, and with the development of technology, the area of ​​a single unit continues to expand, which means that a large number of wireless sensor nodes need to be deployed to ensure the coverage of monitoring. The use of mobile nodes to dynamically monitor the environmental para...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/04H04W84/18
Inventor 王俊张伏李树强邱兆美毛鹏军
Owner HENAN UNIV OF SCI & TECH
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