Single-anchor node positioning method based on target node mobility in two-dimensional space

Abstract

The invention discloses a single-anchor node positioning method based on target node mobility in a two-dimensional space, which comprises the following steps that: an anchor node executes a distance measurement process to obtain a distance from the anchor node to an initial position of the target node; the target node takes the initial position as an original point, establishes a virtual coordinate system, and linearly advances along the selected direction; the target node stops moving, and the moving distance is measured; the anchor node executes a distance measurement process to obtain the distance from the anchor node to the current position of the target node; a new direction is selected by the target node, the target node is linearly advanced along the new direction to stop moving, and a moving distance is measured; the anchor node executes a distance measurement process to obtain the distance from the anchor node to the current position of the target node; and the initial position of the target node is calculated according to the root. According to the single-anchor-node positioning method, the position of the target node can be measured in a scene with only one anchor node under the condition that the hardware complexity of the anchor node is not increased, so that the single-anchor-node positioning method has relatively high environmental adaptability and relatively lowsystem implementation cost.

Description

technical field [0001] The invention relates to the field of positioning, in particular to a distance measurement and positioning method for a single anchor node with a movable target node. Background technique [0002] The continuous development of mobile communication and pervasive computing technology puts forward more and more application requirements for location-based services. Among many positioning technologies, the network-based positioning technology has attracted extensive attention of researchers all over the world due to its advantages of low energy consumption and wide coverage. [0003] It is one of the most commonly used positioning techniques to use anchor nodes with known positions to locate target nodes by ranging. This positioning technology is divided into three stages. The first stage is the anchor node discovery process, that is, the target node broadcasts a data packet, and the node with a known location (such as a base station) replies to the targe...

AI Technical Summary

Problems solved by technology

However, the need to measure angle information puts forward higher requirements on the software and hardware of anchor nodes, especially in networks with limited energy and resources, such as low-power wide-area Internet of Things such as sensor networks, where nodes are equipped with multi-antenna arrays and not realistic

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