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Wireless sensor network positioning method based on overlapped domain gravity center of anchor balls in three-dimensional space

A wireless sensor and three-dimensional space technology, applied in wireless communication, network topology, electrical components, etc., can solve problems such as small calculation amount and positioning error, and achieve the effect of reducing calculation amount, simplifying complexity, and meeting positioning requirements

Active Publication Date: 2012-03-14
海基(常州)工业智能科技有限公司
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Problems solved by technology

This method has the characteristics of simple calculation and small amount of calculation, but the disadvantage of this method is that it has certain requirements for node density and communication radius, and the method adopts a certain approximate treatment for the communication range itself, which is easy to cause positioning errors

Method used

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  • Wireless sensor network positioning method based on overlapped domain gravity center of anchor balls in three-dimensional space
  • Wireless sensor network positioning method based on overlapped domain gravity center of anchor balls in three-dimensional space
  • Wireless sensor network positioning method based on overlapped domain gravity center of anchor balls in three-dimensional space

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] For positioning in three-dimensional space, the amount of calculation is very large, and the energy of sensor nodes is limited, both in terms of computing power and communication capacity. Therefore, in the positioning process, it is very necessary to effectively reduce the computational complexity and improve the computational efficiency.

[0025] Based on the idea of ​​three-dimensional positioning, in order to reduce the amount of computation, this method projects the three-dimensional coordinates to the XOY and YOZ planes respectively, and converts the three-dimensional space positioning problem into two-dimensional plane positioning. figure 1 , since the radius of the obtained circle remains unchanged after projecting onto the plane, the result of plane positioning truly reflects the spatial position of the unknown node, and this method is desirable.

[00...

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Abstract

The invention discloses a wireless sensor network positioning method based on based on overlapped domain gravity center of anchor balls in a three-dimensional space, which is characterized by comprising the following steps of: 1, extracting position information; 2, increasing the radius of an initial ball according to a certain rule, enabling an unknown node to be contained in the ball, wherein the kind of balls are named as domain anchor balls, and a series of domain anchor balls containing the unknown node can be found by taking different anchor nodes as ball centers; 3, respectively projecting all anchor nodes, the unknown node and the domain anchor balls in the space to an XOY plane and a YOZ plane; 4, solving an intersecting circuit region containing the unknown node; and 5, solving gravity center coordinates of the intersecting circuit region as estimating coordinates of the unknown node. According to the invention, the three-dimensional space positioning problem is transformed into positioning in a two-dimensional plane, the complexity of the method is simplified, the calculated amount of the method is reduced at the same time, and a favorable effect under the condition that the node energy of a sensor is limited is achieved.

Description

technical field [0001] The invention relates to a wireless sensor network positioning method based on the barycenter of three-dimensional space anchor-sphere intersection, and belongs to the technical field of wireless communication. Background technique [0002] In Wireless Sensor Networks (WSN), the data collected by nodes must be combined with their measured positions to be meaningful, and the working area of ​​WSN is usually an area that is not suitable for humans to enter or a hostile area. Therefore, if WSN is to be applied in these special areas, it must achieve node positioning with the minimum communication overhead and hardware cost. [0003] As the key supporting technology of wireless sensor network, the positioning of sensor network itself is of great significance to the application of wireless sensor network and the research of location-based network protocols. Most of the existing positioning methods are aimed at the positioning of planar structures, while th...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04W84/18
Inventor 夏心江胡钢江冰刘宴佳张瑞
Owner 海基(常州)工业智能科技有限公司
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