Range-free based device and method for screening network anchor nodes

Abstract

The invention discloses a range-free based device and a method for screening network anchor nodes and belongs to the field of wireless sensor networks. According to the device and the method, average skip distance distribution function information to anchor nodes, which is stored inside unknown nodes, is used, qualified anchor nodes are screened for positioning, and a computer terminal is used for evaluating algorithms. The method mainly comprises the steps of conducting hardware design on a communication-capable node module; using the filtering algorithm to select qualified anchor nodes, and then using a principle of least squares to calculate positions of unknown nodes; and constructing an algorithm evaluation system at the computer terminal, conducting quantitative comparison between algorithms in the method and other range-free algorithms, making accurate judgments on network characteristics on the basis of comparison results, and adjusting the positioning algorithm according to network characteristics, so that optimization of system performance is achieved. The device and the method can improve the positioning precision of unknown nodes, and the improvement effect is more obvious with the increase of unevenness of distribution of network nodes.

Description

technical field [0001] The invention belongs to the technical field of non-ranging positioning of a wireless sensor network, and in particular relates to a non-ranging-based network anchor node screening device and a method thereof. Background technique [0002] Wireless sensor network (WSN, Wireless Sensor Networks) is an ad hoc network composed of low power consumption and small sensor nodes distributed in the monitoring area. Due to its advantages of low power consumption, low price, and strong fault tolerance, wireless sensor networks have always been one of the research hotspots in the field of wireless communication, and are used in environmental monitoring, disaster sites, military battlefields, and biodiversity research. The location information of nodes plays a very important role in WSN, so improving the positioning accuracy is of great significance to improving the effectiveness and practicability of the network. [0003] There are many kinds of positioning algor...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: Aiming at the problem of poor positioning accuracy of the non-ranging algorithm, the present invention proposes a non-ranging-based network anchor node screening device and its method. The device and its method can not only improve the positioning accuracy, but also As the uniformity increases, the positioning improvement effect is more obvious

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