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Node localization method based on centroid iterative estimation

A node positioning and iterative technology, applied in location information-based services, electrical components, wireless communication, etc., can solve the problem of low positioning accuracy and achieve the effect of improving positioning accuracy and better resistance to RSSI errors

Active Publication Date: 2016-02-03
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a node positioning method based on the iterative estimation of the centroid based on the deficiency of the above-mentioned background technology. The iteration termination condition is determined through the positional relationship between the unknown node and the area surrounded by the initial connected node, and the wireless positioning method is positioned after multiple iterations. The sensor network node solves the technical problem of low positioning accuracy based on non-ranging positioning methods

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  • Node localization method based on centroid iterative estimation
  • Node localization method based on centroid iterative estimation
  • Node localization method based on centroid iterative estimation

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Embodiment Construction

[0030] Embodiments of the present invention will be described in detail below, and the embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

[0031] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein Explanation.

[0032] Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of an embodiment, and the modu...

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Abstract

The invention discloses a node localization method based on centroid iterative estimation, and belongs to the technical field of wireless sensor networks. The method comprises the following steps: firstly, determining an iterative convergence condition of the method according to a position relationship between an unknown node and a region enclosed by initial communication beacon nodes; calculating a centroid coordinate of a region enclosed by current communication beacon nodes and a distance between the centroid coordinate and the unknown node through coordinates of the communication beacon nodes and received signal strength indications (RSSIs) between the coordinates of the communication beacon nodes and the unknown node; and replacing the communication beacon nodes being farthest from the unknown node by calculated centroid nodes in order to reduce a region in which the unknown node is located. The aims of reducing the region in which the unknown node is located and increasing the node localization accuracy are fulfilled through multiple iterations.

Description

technical field [0001] The invention discloses a node positioning method based on centroid iterative estimation, and belongs to the technical field of wireless sensor networks. Background technique [0002] Wireless sensor network is a basic part of the Internet of Things. It uses multiple sensor nodes to form a wireless network through self-organization. It is an information production and collection system used by the Internet of Things to perceive, identify, and process monitored objects in the network coverage area. With the continuous development of sensor technology, embedded computing technology, computer network technology and wireless communication technology, wireless sensor network technology has gradually matured, and has been widely used in military reconnaissance, environmental monitoring, target tracking, medical care and many other fields. universal. [0003] Wireless sensor network node positioning refers to the unknown node's estimation of its own position...

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Application Information

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IPC IPC(8): H04W4/02H04W84/18
CPCH04W4/025H04W84/18
Inventor 蒋锐杨震
Owner NANJING UNIV OF POSTS & TELECOMM
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