Method for positioning wireless sensor network

Abstract

The invention relates to a method for positioning a wireless sensor network. The method comprises the following steps: an unknown node receives a message which is broadcast and transmitted by a mobile anchor node and contains position of the node; a two-dimensional rectangular coordinate system is established for the region of the wireless sensor network to determine a mobile path of the mobile anchor node; the mobile anchor node moves a certain distance every period T; a beacon signal is broadcast in a circle with a communication radius r by using the position of the mobile anchor node, wherein the beacon signal comprises the position message of the mobile anchor node at the moment and the time at the moment; the moving path of the mobile anchor node is a regular triangle, wherein the side length of the regular triangle is d, and d equals to r; the unknown node constantly monitors and receives the beacon messages, and receives three beacon messages broadcast by the mobile anchor node; and if positions of the three beacon messages form a regular triangle, and the unknown node is positioned in the regular triangle, the position message of the unknown node can be acquired by a trilateration survey method. The method has the advantages of high positioning accuracy and low networking cost, and is not easily influenced by environmental factors.

Description

technical field [0001] The invention relates to a positioning method in the field of wireless communication, in particular to a wireless sensor network positioning method. Background technique [0002] In recent years, with the development of micro-electro-mechanical systems, wireless communication and digital electronic technology, wireless sensor networks (wireless sensor networks, WSN) have been widely used in military applications and civilian applications. And other fields have also achieved good application results. [0003] Location information is of great significance to the application of WSN. The location of the event or the location of the information source is an important part of the data transmitted by the sensor network. Therefore, WSN positioning technology has become a hot research topic. At present, scholars have proposed many positioning algorithms for WSN, which are mainly divided into two categories: anchor node-based and non-anchor-based WSN node posit...

AI Technical Summary

Problems solved by technology

Although the path length of the mobile node in this algorithm is relatively short, and the energy consumption of the node is correspondingly saved, but the node at the edge cannot be located because it cannot receive enough information.

[0010]5. Koutsonilas D et al. analyzed the mobile node in the article "Path planning of mobile landmarks for localization in wireless sensor networks" published in "Computer Communication" in 2007 The path moving along the coordinate axis direction compares its advantages and disadvantages. Although the Scan method has the shortest moving length, it will cause the information received by the unknown node to be on the same straight line and cannot be located.

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