A 3D cooperative positioning method for rssi wireless sensor network

A wireless sensor and network three-dimensional technology, applied in positioning, wireless communication, radio wave measurement system, etc., can solve the problems of insufficient positioning accuracy, achieve low cumulative error, improve correction effect, and optimize positioning results

Active Publication Date: 2021-07-20
广东华东爆破拆迁工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a three-dimensional collaborative positioning method for RSSI wireless sensor networks in order to overcome the defects of insufficient indoor positioning accuracy described in the prior art.

Method used

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  • A 3D cooperative positioning method for rssi wireless sensor network
  • A 3D cooperative positioning method for rssi wireless sensor network
  • A 3D cooperative positioning method for rssi wireless sensor network

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Experimental program
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Embodiment 1

[0092] This embodiment provides an RSSI wireless sensor network three-dimensional collaborative positioning method, such as figure 1 As shown, the method includes the following steps:

[0093] S1: Use the WSN coarse positioning algorithm based on the LightGBM model to perform rough positioning on the unknown node, and obtain the coordinates of the unknown node position as (x, y, z);

[0094] S2: Calculate the average value of the received signal strength RSSI from different anchor nodes, the calculation formula is:

[0095]

[0096] Among them, n is the number of neighbor anchor nodes, RSSI i is the received signal strength with the i-th anchor node;

[0097] S2: Determine the RSSI threshold RSSI in different environments thers ; Judge RSSI av ≥RSSI thres Whether it is established, if established, proceed to S3; if not established, proceed to S7;

[0098] S3: Determine whether the number of neighboring anchor nodes is greater than or equal to 4, if yes, proceed to S4, i...

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Abstract

The invention relates to an RSSI wireless sensor network three-dimensional cooperative positioning method, comprising: (1) performing data preprocessing and feature extraction after collecting received signal strength RSSI of an unknown node to be positioned, and then performing prediction to obtain a rough positioning result. (2) Set the RSSI threshold, select nodes with higher positioning accuracy from unknown nodes, and use the subset judgment for the selected nodes to obtain the second-selected cooperative nodes; finally, use the principle of anchor node replacement to screen out the nodes that meet the accuracy requirements node as the preferred collaborating node. (3) Use the distance between two nodes as the radius to draw a circle for the nodes selected according to the precision optimization strategy. The quadrilateral area is composed of the inner coordinates of the intersection points of two adjacent circles. The coordinates are obtained according to the principle of the rotation matrix. Finally, the centroid of the area is calculated and used as the coordinates of the unknown nodes as the final corrected positioning result. The invention can improve the indoor positioning accuracy.

Description

technical field [0001] The present invention relates to the technical field of wireless sensor network indoor positioning, and more specifically, relates to a three-dimensional collaborative positioning method for an RSSI wireless sensor network. Background technique [0002] With the rapid development and maturity of science and technology, people's demand for Location Based Services (LBS) is also growing continuously. At present, outdoor positioning technologies such as Global Positioning System (Global Positioning System, GPS) and cellular wireless positioning technologies have been very mature, and are widely used in car navigation, military and other fields. However, the average person spends at least 80% of their time indoors. Therefore, indoor positioning technology has a broader application prospect. However, compared with the outdoor environment, the indoor environment is more complex and the signal is easily blocked and interfered by large objects such as buildin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04B17/318G01S5/10
CPCG01S5/10H04W64/00H04B17/318
Inventor 李志梁许亮
Owner 广东华东爆破拆迁工程有限公司
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