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Three-dimensional positioning method for network node of wireless sensor

A wireless sensor and network node technology, applied in network topology, wireless communication, wireless communication services, etc., can solve the problems of uncertain positioning results, no anchor nodes involved, inaccuracy, etc., to reduce difficulty and increase efficiency. The effect of sex, precise positioning

Active Publication Date: 2012-09-19
HOHAI UNIV
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Problems solved by technology

[0011] However, none of the above methods involves the uncertainty of the spatial position relationship of the anchor nodes and the inaccuracy of the positioning results caused by the movement of the nodes. but very important

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  • Three-dimensional positioning method for network node of wireless sensor
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  • Three-dimensional positioning method for network node of wireless sensor

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0032] The present invention designs an underwater sensor network node positioning method optimized based on a three-dimensional DV-Hop positioning method. In the stage of calculating the position coordinates of unknown nodes, the optimization method judges the validity of anchor node combinations and excludes four-point coplanar anchor node combinations. ; After calculating the coordinates of the unknown nodes, the positioning results are corrected according to the mobil...

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Abstract

The invention discloses a three-dimensional positioning method for a network node of a wireless sensor, which comprises the following steps: calculating the distance estimated value from an unknown node to anchor nodes through a self-information pack of an anchor node broadcast; judging the combination validness of the anchor nodes and removing the combination of four anchor nodes which are coplanar; combining the distance estimated value and calculating the position coordinates of the unknown node; and correcting node position movement caused by water flow by using a local area position correcting method to obtain a corrected node positioning result. The three-dimensional positioning method for the network node of the wireless sensor can precisely position the network node of the underwater sensor.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor network node positioning, in particular to a three-dimensional positioning method for underwater wireless sensor network nodes. Background technique [0002] In the monitoring application research of coastal shallow waters and estuaries, the purpose of deploying underwater sensor networks is to collect relevant hydrological parameters and water environment data in real time and three-dimensionally to improve monitoring quality. Network node positioning is the basis for developing applications. However, due to the particularity of water flow, positioning is difficult, mainly as follows: [0003] (1) Node deployment adopts fixed anchor chains and buoys on the bottom of the water (that is, the nodes are placed underwater at a preset depth), forming a three-dimensional space network. However, the three-dimensional spatial distribution of nodes leads to the uncertainty of the spatial position ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/04H04W64/00H04W84/18
Inventor 王慧斌吴燕张丽丽徐淑芳沈洁杨会杰
Owner HOHAI UNIV
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