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Location Method of Unknown Sensor Nodes in Wireless Sensor Networks

A sensor node, wireless sensor technology, applied in network topology, wireless communication, advanced technology and other directions, can solve the problems of low positioning accuracy and complex algorithm of positioning algorithm

Inactive Publication Date: 2020-09-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problems of low positioning accuracy and complex algorithm of the existing ranging-based positioning algorithm, and provides a positioning method for unknown sensor nodes in a wireless sensor network

Method used

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  • Location Method of Unknown Sensor Nodes in Wireless Sensor Networks
  • Location Method of Unknown Sensor Nodes in Wireless Sensor Networks
  • Location Method of Unknown Sensor Nodes in Wireless Sensor Networks

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Experimental program
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Embodiment Construction

[0133] The positioning method of the unknown sensor node in the wireless sensor network is realized by the following steps:

[0134] Z1: The unknown node P receives the signal of the surrounding beacon nodes, and converts the received signal strength value into the distance value between the unknown node and the beacon node; the conversion here uses the well-known logarithmic-constant wireless signal propagation model.

[0135] Z2: Set the number of beacon nodes that the unknown node P receives the signal to be m, m≥3, take any 3 beacon nodes that are not collinear as a group, a total of k groups;

[0136] Z3: From the first group of beacon nodes to the kth group of beacon nodes, the coordinates of the unknown node P are calculated sequentially, and a total of k coordinates are obtained, which are expressed as (x P1 ,y P1 ),...(x Pk ,y Pk ); select the uth group of beacon nodes, where u takes a value from 1 to k, set the group of beacon nodes as A, B, and C, and calculate t...

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Abstract

The invention discloses a positioning method of an unknown sensor node in a wireless sensor network, related to wireless sensor network positioning technology. The problem that the existing range-based positioning algorithm has low positioning accuracy and complicated algorithm is solved. According to the positioning method of the unknown sensor node disclosed by the invention, a signal strength value received between nodes is used to convert to a distance value between the nodes first; any three beacon nodes A, B and C around an unknown node are used to obtain four possible coordinates of theunknown node through the principle of the common side ratio theorem and the four possible coordinates of the unknown node are judged; and finally, the Gravitational Search Algorithm (GSA) is used foroptimizing, so as to confirm the coordinate of the unknown node to complete the positioning. The positioning method of unknown sensor node disclosed by the invention improves the algorithm accuracy,reduces the algorithm complexity, reduces the energy consumption of the node, and prolongs the life cycle of the node.

Description

technical field [0001] The invention relates to a wireless sensor network positioning technology, in particular to a positioning method for an unknown sensor node in a wireless sensor network, which is mainly used for obtaining accurate position information of an unknown sensor node in a wireless sensor network. Background technique [0002] In recent years, the Internet of Things technology has continuously achieved new results, and has been applied to the fields of national defense, military, environmental monitoring, traffic management, medical and health care, manufacturing, disaster relief, etc. As one of the underlying technologies of the Internet of Things, wireless sensor networks have become a research area. hotspot. Among them, obtaining accurate location information through positioning algorithms is a very important content of wireless sensor networks. [0003] Positioning algorithms are divided into non-range-based positioning algorithms (eg, DV-HOP algorithm) a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W84/18
CPCH04W64/003H04W64/006H04W84/18Y02D30/70
Inventor 乔学工段亚青周文祥王华倩
Owner TAIYUAN UNIV OF TECH