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Information 2017, 8(2), 40; doi:10.3390/info8020040

HTCRL: A Range-Free Location Algorithm Based on Homothetic Triangle Cyclic Refinement in Wireless Sensor Networks

1
College of Computer Science and Technology, Jilin University, Changchun 130012,
2
Computer Science and Information Technology Department, Daqing Normal University, Daqing 163712,
*
Author to whom correspondence should be addressed.
Received: 3 January 2017 / Revised: 8 March 2017 / Accepted: 23 March 2017 / Published: 27 March 2017
(This article belongs to the Special Issue Sensor Networks for Emergent Technologies)
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Abstract

Wireless sensor networks (WSN) have become a significant technology in recent years. They can be widely used in many applications. WSNs consist of a large number of sensor nodes and each of them is energy-constrained and low-power dissipation. Most of the sensor nodes are tiny sensors with small memories and do not acquire their own locations. This means determining the locations of the unknown sensor nodes is one of the key issues in WSN. In this paper, an improved APIT algorithm HTCRL (Homothetic Triangle Cyclic Refinement Location) is proposed, which is based on the principle of the homothetic triangle. It adopts perpendicular median surface cutting to narrow down target area in order to decrease the average localization error rate. It reduces the probability of misjudgment by adding the conditions of judgment. It can get a relatively high accuracy compared with the typical APIT algorithm without any additional hardware equipment or increasing the communication overhead. View Full-Text
Keywords: localization; APIT localization algorithm; sensor nodes; localization error rate; homothetic triangle localization; APIT localization algorithm; sensor nodes; localization error rate; homothetic triangle
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MDPI and ACS Style

Zhang, D.; Fang, Z.; Sun, H.; Cao, J. HTCRL: A Range-Free Location Algorithm Based on Homothetic Triangle Cyclic Refinement in Wireless Sensor Networks. Information 2017, 8, 40.

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