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Range-based wireless sensing network node positioning method

A wireless sensor network, node positioning technology, applied in wireless communication, network topology, electrical components and other directions, can solve problems such as affecting positioning accuracy, and achieve the effect of reducing measurement errors and improving node positioning accuracy

Inactive Publication Date: 2013-01-16
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

Various existing ranging-based positioning methods use wireless signals to actually measure ranging data such as RSSI, TOA, TDOA, and AOA. The measurement process will be affected by non-line-of-sight propagation (NLOS), thereby affecting the final positioning accuracy.

Method used

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Embodiment Construction

[0014] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0015] The idea of ​​the present invention is: on the basis of the existing ranging-based wireless sensor network node positioning method, the quantum BP neural network is used to measure the measurement values ​​of the ranging data such as signal indication strength, signal arrival time / time difference, and signal arrival angle. Error correction, so as to achieve the purpose of improving positioning accuracy.

[0016] Quantum neural network borrows the quantum mechanical effect existing in the human brain, combines artificial nerves and quantum theory, and better simulates the information processing process of the human brain. N.B. Karayiannis borrowed the superposition principle from quantum theory and proposed a three-layer quantum neural network model. Japanese scholar Matsui and others proposed to use the quantum state as the state of the neuron. ...

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Abstract

The invention discloses a range-based wireless sensing network node positioning method. Aiming at the conventional range-based wireless sensing network node positioning technology, the positioning precision is influenced because of relatively large wireless range data error such as a received signal strength indicator (RSSI), time of arrival (TOA), time difference of arrival (TDOA) and angle of arrival (AOA) caused by range-free transmission; and by the method, wireless range data are corrected by using a quantum BP neutral network, and positioning is performed by using the corrected range data. Compared with the prior art, the method has the advantages that the positioning precision of a wireless sensor network can be greatly improved, the training learning time is short, the algorithm convergence speed is high, and the robustness is high.

Description

technical field [0001] The invention relates to a wireless sensor network node positioning method, in particular to a ranging-based wireless sensor network node positioning method, and belongs to the technical field of wireless sensor network. Background technique [0002] Wireless sensor network positioning is an important branch in the field of wireless sensor network communication technology. It plays an important role in many fields such as disaster monitoring, warehouse management, interactive storage, and factory automation production lines. [0003] In a wireless sensor network, only a few nodes know their location, and these nodes are called anchor nodes (or beacon nodes). Other nodes are located by the location information of anchor nodes, and these nodes are collectively called unknown nodes. The node energy of the sensor network is limited, the reliability is poor, the scale is large, and the communication distance is limited, which restricts the acquisition of p...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04W84/18
Inventor 冯晨张玲华
Owner NANJING UNIV OF POSTS & TELECOMM
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