Wireless sensor network node locating method based on ultra-broadband

A wireless sensor node, wireless sensor technology, applied in transmission systems, electrical components, data exchange through path configuration, etc., can solve problems such as low accuracy, achieve low positioning cost, strong anti-multipath and interference ability, and flexible. sex effect

Inactive Publication Date: 2008-04-02
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The positioning mechanism without ranging has advantages in terms of cost and power consumption, but the accuracy is low. The main algorithms include centroid algorithm, convex programming algorithm, DV-Hop, Amorphous, MDS-MAP and APIT algorithms, etc.

Method used

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  • Wireless sensor network node locating method based on ultra-broadband
  • Wireless sensor network node locating method based on ultra-broadband
  • Wireless sensor network node locating method based on ultra-broadband

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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0033] Fig. 1 is a flow chart of the node positioning method of the present invention. The localization algorithm is divided into three stages: local relative coordinate map localization stage with cluster as unit, local relative coordinate map merged into global relative coordinate map stage and relative coordinate map to absolute coordinate map conversion stage. Its specific steps include:

[0034] 1) Set several nodes at the border of the network as the termination nodes of the route. The sink node is used as the originating node to initiate the flooding route. When the terminating node is encountered, the flooding in this direction ends, thus finding several routes from the sink node to the terminating node;

[0035] 2) Each node included in each originating node-end node route takes itself as the cluster head node of the cluster, and joins its one-hop neighbor no...

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Abstract

The present invention discloses a method for locating radio sensor network node based on overwide band. The present invention uses overwide band as the communication medium of radio sensor node, and receives radio signal intensity indicating value measured between two nodes by normal data package, and locates using the radio signal intensity indicating value between nodes directly by non-metric ruler technology. Wherein the locating arithmetic includes three stages: a stage of local relative coordinates image location with cluster as unit; a stage that local image unites to global relative coordinates image; a stage that exchanging the relative coordinates image to absolute coordinate image. The present invention combines a plurality advantages such as overwide band multipath-resisting and strong interfere capacity, good capture characteristics etc., and ensure the location is characterized in that low cost, high precision and good adaptability.

Description

technical field [0001] The invention relates to ultra-wideband (UWB) technology and wireless sensor network node positioning technology, in particular to a wireless sensor network node positioning method based on ultra-wideband. Background technique [0002] Accurate positioning of nodes is an important condition for wireless sensor network applications. A direct idea to obtain the location of nodes is to use the Global Positioning System (GPS), but using GPS to obtain the locations of all nodes in a wireless sensor network is limited by factors such as price, volume, and power consumption, and there are some difficulties. In addition, GPS It is also difficult to apply to indoor wireless sensor networks. According to the positioning mechanism, the existing wireless sensor network positioning algorithms can be divided into two categories: Range-based and Range-free, that is, positioning algorithms based on ranging technology and positioning algorithms without ranging. The f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/12H04L12/28
Inventor 李仁发罗娟肖玲曾凡仔文建国付彬魏叶华李瑞芳
Owner HUNAN UNIV
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