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The Research on 3-D Localization in Wireless Sensor Networks

Author: LiuZhiQiang
Tutor: WangXingFu
School: University of Science and Technology of China
Course: Applied Computer Technology
Keywords: Wireless sensor networks Three-dimensional positioning In the median plane Neighbor Secondary positioning
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 127
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Abstract


The location information of the sensor nodes in wireless sensor networks for practical applications is very important, for example, in the things that monitoring need to know it happened, when things happen, this time you need to know the location information of the sensor nodes, Otherwise, the application has no real meaning. Sensor node positioning technology is one of the most basic functions in the sensor network, and also the support functions of the wireless sensor network applications. Existing positioning program can be divided into the relevant distance (range-based) location algorithm and is independent of the distance (range-free) location algorithm. Beacon nodes and unknown node related information (distance, angle, etc.) between the distance of the associated positioning mechanism needs to be measured to obtain these data and then using the calculation method (trilateration method, etc.) to achieve positioning; independent of the distance positioning The program is to establish the connectivity of nodes in wireless sensor networks up to the unknown node positioning, not dependent on the angle information node distance information between nodes. Based on the positioning mechanism of the distance ranging method: based on the signal propagation time of arrival (TOA) to the ranging, after the arrival of the signal propagation time difference (TDOA) ranging, according to the signal propagation after the arrival the angle (AOA), ranging, according to the node receives a radio signal strength (RSSI) to Ranging; positioning mechanism is independent of the distance: DV-hop positioning algorithm, the APIT positioning algorithm, centroid positioning algorithm. This paper focuses on the theme of three-dimensional positioning of nodes in a wireless sensor network has undertaken a number of studies, the main contribution of this paper can be summarized as follows: (1) regional node where initially determined to be located, introduces the idea of ??the vertical surface to wireless sensor networks the three-dimensional positioning of the nodes, the anchor node in the node to be positioned within communication range of a group of two can determine a median plane, the distance relationship based on received signal strength of the two anchor node to determine with these two anchors, be positioned in order to determine which side of the node is in the vertical plane, treat the the positioning node area where the secondary segmentation, shrinking be positioning the node where the region to improve the accuracy of three-dimensional positioning. (2) the introduction of the basic idea of ??the bounding-box algorithm to three-dimensional positioning of nodes in the wireless sensor networks the regional node where initially determined to be located, positioning nodes around the other neighbors will be unknown node as a reference node proposed a new secondary location algorithm, to further narrow the area where to be positioned nodes, greatly improve the positioning accuracy, the algorithm has a relatively simple calculation mechanism, greatly reducing the energy consumption of sensor nodes to extend the wireless sensor network run time.

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