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AT-Free: A Preliminary Method for Localization Techniques in Sensor Networks

Abstract : Mobile wireless sensors need to know their localizations in many control and monitoring applications. Among all sensors, some know their exact position (i.e., they are equipped with GPS or they are positioned by human intervention). These sensors are called anchors. Some sensors can have different capabilities allowing them to calculate either distances or angles when they receive messages from others nodes. So, they only use anchor positions to obtain an estimated position. However, when sensors are mobile they cannot continuously calculate their position because of the energy constraints. This paper concerns the localization problem in the case where all nodes in the network (anchors and others sensors) are mobile. We propose three techniques following the capabilities of nodes. Thus, each node obtains either an exact position or an approximate position with the knowledge of the maximal error born. Also, we adapt the periods where nodes invoke their localization. Simulation results show the performances of our methods in term of accuracy and determinate the technique the more adapted related to the network configurations.
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Contributor : Clément Saad <>
Submitted on : Thursday, December 6, 2007 - 1:42:24 PM
Last modification on : Tuesday, January 14, 2020 - 10:38:05 AM
Long-term archiving on: : Monday, April 12, 2010 - 6:25:28 AM


  • HAL Id : lirmm-00194359, version 1


Clément Saad, Abderrahim Benslimane, Jean-Claude König, Jacques Turbert. AT-Free: A Preliminary Method for Localization Techniques in Sensor Networks. NOTERE'2007: 7th International Conference on New Technologies of Distributed Systems, Jun 2007, Marrakech, Morocco. ⟨lirmm-00194359⟩



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