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Wireless sensor network all-moving node positioning method based on RSSI

A wireless sensor and node positioning technology, which is applied in the directions of location-based services, positioning, radio wave measurement systems, etc., and can solve problems such as node positioning that cannot be solved.

Active Publication Date: 2016-01-06
NORTHEAST DIANLI UNIVERSITY
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AI Technical Summary

Problems solved by technology

The current ranging and positioning algorithms are mostly used for static node positioning, or when some nodes are moving and some nodes are still. There is no RSSI ranging algorithm applied to node positioning when both anchor nodes and unknown nodes are in a moving state, and the current algorithm cannot Solve the node positioning when the number of anchor nodes is less than 3

Method used

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  • Wireless sensor network all-moving node positioning method based on RSSI
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  • Wireless sensor network all-moving node positioning method based on RSSI

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Embodiment Construction

[0087] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention will be further explained below in conjunction with specific embodiments.

[0088] Reference Figure 1-4 This specific embodiment adopts the following technical solutions: the present invention proposes a mobile node positioning algorithm based on RSSI weighted centroid, and the RSSI weighted centroid algorithm is applied to a wireless sensor network where anchor nodes and unknown nodes are fully mobile. Combining the speed of the unknown node with the change of the tilt angle at different times, to solve the problem that the RSSI positioning algorithm cannot be located when there are less than 3 anchor nodes.

[0089] 1. Determination of the ranging model

[0090] In general, the average power of the received signal shows attenuation as the distance increases. The theoretical model commonly used in wireless transmission is the sha...

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Abstract

The invention relates to a wireless sensor network all-moving node positioning method based on an RSSI. An existing range-based positioning algorithm is usually used for static node positioning or is used for the condition that partial nodes are moving and partial nodes are static, the RSSI range-based positioning algorithm has not been used for node positioning under the condition that all of anchor nodes and unknown nodes are in a moving state, and the existing algorithm fails to realize node positioning under the condition that the number of the anchor nodes is less than 3. The invention aims to overcome the defects of the prior art and provides the wireless sensor network all-moving node positioning method based on the RSSI. According to the invention, when the unknown nodes are in communication with four, three, two and one anchor node, different algorithms are adopted to obtain the positions of the unknown nodes.

Description

Technical field [0001] The invention relates to a method for locating network nodes, in particular to a method for locating all mobile nodes in a wireless sensor network based on RSSI. Background technique [0002] Wireless sensor networks (wireless sensor networks, WSN) is a multi-hop self-organizing network system formed by a large number of inexpensive micro sensor nodes deployed in the monitoring area. The purpose is to cooperatively sense, collect and process the network. The information of the sensing object in the coverage area is sent to the observer. [0003] In the sensor network, location information is very important to the monitoring activities of the sensor network. The location where the event occurs or the location of the node where the information is obtained is the important information contained in the sensor node monitoring message. Therefore, it is one of the most basic functions of sensor network to determine the location of an event or the node location to o...

Claims

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Application Information

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IPC IPC(8): G01S5/12G01S5/02H04W4/02
CPCG01S5/021G01S5/0278G01S5/12H04W4/025
Inventor 李建坡穆宝春王晓辉王艳娇奚洋刘迪姜万昌
Owner NORTHEAST DIANLI UNIVERSITY
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