Node positioning method and device
A node positioning and node technology, applied in the information field, can solve the problems of low node positioning result accuracy, not considering the earth's surface, etc., to achieve the effect of simple implementation and improved positioning accuracy
Inactive Publication Date: 2014-05-28
INNER MONGOLIA UNIVERSITY
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[0003] However, the traditional node positioning methods are all based on the two-dimensional coordinate system, that is, the positioning method based on the plane, which does not consider the spherical surface of the earth itself. Therefore, the accuracy of the node positioning results of the traditional node positioning method is low
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[0052]The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0053] Among the traditional node positioning methods, the trilateral positioning method is more commonly used. This algorithm estimates the position of unknown nodes by calculating the intersection points of intersecting circles and the centroid of the area formed by the intersection points. Specifically, the latitude and longitude coordinates of three nodes with known latitude and longitude coordinates are respectively converted into two-dimensional space coordinates, assuming that the two-...
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The embodiment of the invention discloses a node positioning method and a node positioning device. The node positioning method comprises the steps of considering that the surface of the earth is a spherical surface, obtaining distances between three nodes with known longitude and latitude coordinates and a node to be positioned by virtue of a link quality indication value, converting the longitude and latitude coordinates of the three nodes with the known longitude and latitude coordinates into three-dimensional space coordinates, calculating a three-dimensional space coordinate of the node to be positioned according to the three-dimensional space coordinates, and converting the three-dimensional space coordinate of the node to be positioned into a longitude and latitude coordinate of the node to be positioned. Namely, the embodiment of the invention considers that the surface of the earth is the spherical surface in a positioning process, and the three-dimensional space coordinate of the node to be positioned is calculated in a three-dimensional space, so that the positioning precision of the node is improved; furthermore, the coordinate of the node to be positioned is determined in the three-dimensional space, so that the implementation is easy.
Description
technical field [0001] The present application relates to the field of information technology, and more specifically, to a node positioning method and device. Background technique [0002] The wireless sensor network is a network composed of sensor nodes integrating sensing units, information processing units, wireless communication units, etc. through self-organization, and collects the required physical information in real time by means of various integrated micro-sensors, such as Temperature, humidity, speed, direction, etc., and transmitted to the user terminal in the form of multi-hop relay. The location of nodes in wireless sensor networks plays an important role in the whole sensor network, and is an indispensable link in event observation, target tracking, network reconstruction and so on. [0003] However, the traditional node positioning methods are all based on the two-dimensional coordinate system, that is, the positioning method based on the plane, which does n...
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Inventor 马学彬沈延麒牛丽娜
Owner INNER MONGOLIA UNIVERSITY