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Dynamic self-adaptation positioning method of underwater wireless sensor network

A dynamic adaptive, wireless sensor technology, applied in wireless communication, network topology, electrical components, etc.

Active Publication Date: 2014-10-01
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

[0005] The purpose of the present invention is to provide a dynamic self-adaptive positioning method for underwater wireless sensor networks, which solves the problem of self-positioning of underwater wireless sensor network nodes under the influence of multi-source unknown noise and the existence of anchor node position errors and multi-hop distance estimation deviations. ; Under the condition of small sample size, through the online evaluation and calibration of the accuracy of the anchor node's declared position coordinates, the impact of the anchor node position error on the positioning performance is reduced, and the multi-hop distance estimation of the deviation adaptive correction is used to reduce the node multi-hop distance Estimate the impact of deviation on positioning performance, enhance the online cognition and dynamic adaptive ability of nodes in complex positioning environments, and improve the positioning performance of underwater wireless sensor networks

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  • Dynamic self-adaptation positioning method of underwater wireless sensor network
  • Dynamic self-adaptation positioning method of underwater wireless sensor network
  • Dynamic self-adaptation positioning method of underwater wireless sensor network

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[0100] Such as Figure 5 As shown, 200 sensor nodes are randomly deployed in a three-dimensional space area of ​​300m×300m×100m, among which the proportion of anchor nodes is 10%, represented by a five-pointed star, and their IDs are 1-20 respectively; the number of nodes to be located is 180 , represented by solid dots, whose IDs are 21-200 respectively. All nodes have ranging function. The dotted line between nodes means that two nodes can communicate directly. The length of the dotted line means the Euclidean distance between two nodes. The maximum number of distance measurements n between nodes is 5, and the position of the anchor node deviates from the sample V i The number of Bootstrap resampling B is 200, and the original ranging sample D between nodes ia The number of resamples M is 200. The preset accuracy threshold λ for node location evaluation is 0.97, and the confidence level for multi-hop distance estimation is 0.95. The multi-hop threshold ζ for ranging and ...

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Abstract

The invention discloses a dynamic self-adaptation positioning method of an underwater wireless sensor network, and belongs to the technical field of positioning of the underwater wireless sensor network. The dynamic self-adaptation positioning method of the underwater wireless sensor network comprises the following steps that firstly, an anchor node evaluates the accuracy of the coordinates of the self-statement position; secondly, a node to be positioned builds a dynamic updatable positioning set; thirdly, the positioning set carries out multi-hop distance estimation with the deviation corrected in a self-adaptation mode; fourthly, the position accommodation space of the node to be positioned is solved; fifthly, coordinate estimation and accuracy evaluation of the node to be positioned are carried out. The accuracy of the coordinates of the statement position of the anchor node is evaluated and calibrated on line, the adverse influence on positioning performance from the position error of the anchor node is reduced, the accuracy of multi-hop distance estimation is improved through multi-hop distance estimation with the deviation corrected in the self-adaptation mode, the on-line cognition and dynamic self-adaptation capacity of a complex positioning environment of a sensor network node are improved, ad the positioning performance of the underwater wireless sensor network is improved.

Description

technical field [0001] The invention belongs to the technical field of underwater wireless sensor network positioning, in particular to self-positioning of underwater wireless sensor network nodes for applications in complex ocean environments, and specifically relates to a dynamic self-adaptive positioning method for underwater wireless sensor networks. Background technique [0002] Underwater Wireless Sensor Networks (Underwater Wireless Sensor Networks) is a revolution in the field of marine information perception and application. Large-scale random deployment in complex marine environments to perform tasks such as information perception, collection, processing and transmission is a typical application, such as Sea battlefield situation awareness, marine environment monitoring, underwater target positioning and tracking, etc. Node self-localization is a key supporting technology for underwater sensor networks and a prerequisite for such applications, because the perceived...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W84/18
Inventor 任永吉钟建林黄隽宋艳波刘涛王伟亚郭海燕
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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