Safe positioning method in wireless sensor network

By deploying anchor nodes and sensor nodes in the underwater wireless sensor network, using anchor node position prediction algorithm and multipath effect analysis, the problem of reducing positioning accuracy caused by underwater environment complexity is solved, and higher positioning accuracy and stability are achieved.

CN119697760APending Publication Date: 2025-03-25HAINAN UNIV
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Patent Information

Application Number
CN202411840048.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The underwater environment is complex and changeable, and the velocity, direction and intensity of the water flow affect the propagation of sound waves, resulting in a decrease in positioning accuracy. Especially when the water flow velocity is large, the propagation path of the sound wave may be offset, resulting in a deviation in the positioning result.

Method used

The secure positioning method in the wireless sensor network is adopted, and positioning information is constructed to improve positioning accuracy by deploying anchor nodes and sensor nodes, using anchor node position prediction algorithm, time difference distance measurement, depth sensors and multipath effect analysis.

Benefits of technology

By predicting the anchor node position, extending the propagation distance of the acoustic wave signal, and using multipath effect analysis, the positioning accuracy and stability are significantly improved, and the impact of water flow on positioning is reduced.

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Abstract

The invention relates to the technical field of safe positioning, and discloses a safe positioning method in a wireless sensor network, which comprises the following steps of: S1, node deployment and anchor node setting: deploying sensor nodes, and selecting two anchor nodes which move at the same time; s2, signal transmission and reception: the anchor nodes periodically transmit sound wave signals, the sensor nodes receive the sound wave signals from the anchor nodes, the receiving time is recorded, and relay nodes are arranged between the sensor nodes and the anchor nodes; s3, time difference distance measurement: the sensor node calculates and receives the time difference of signals from the two anchor nodes by using local time information, and converts the time difference into a distance difference; s4, converting three-dimensional positioning into plane positioning: acquiring depth information by the sensor node by using a depth sensor of the sensor node, and projecting the position of the sensor node to the same plane as the anchor node; and S5, positioning calculation is carried out according to the distance difference between the sensor node and the two anchor nodes and the position information of the anchor nodes.
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