Localization in underwater sensor networks: survey and challenges
WUWNet '06 Proceedings of the 1st ACM international workshop on Underwater networks
Energy-efficient on-demand reprogramming of large-scale sensor networks
ACM Transactions on Sensor Networks (TOSN)
Self-stabilizing philosophers with generic conflicts
ACM Transactions on Autonomous and Adaptive Systems (TAAS)
Locate More Sensors with Fewer Anchors in Wireless Sensor Networks
WASA '08 Proceedings of the Third International Conference on Wireless Algorithms, Systems, and Applications
ICRA'09 Proceedings of the 2009 IEEE international conference on Robotics and Automation
Self-stabilizing philosophers with generic conflicts
SSS'06 Proceedings of the 8th international conference on Stabilization, safety, and security of distributed systems
International Journal of Interdisciplinary Telecommunications and Networking
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With the development of location aware sensor applications, location determination has become an increasingly important middleware technology. Numerous current technologies for location determination of sensor nodes use the received signal strength from sensor nodes using omni-directional antennas. However, an increasing number of sensor systems are now deploying directional antennas due to their advantages like energy conservation and better bandwidth utilization. In this paper, we present techniques for location determination in a sensor network with directional antennas under different kinds of deployment of the nodes. We show how the location estimation problem can be solved by measuring the received signal strength from just one or two anchors in a 2D plane with directional antennas. We implement our technique using Berkeley MICA2 sensor motes and show that it is up to three times more accurate than triangulation using omni-directional antennas. We also perform Matlab simulations that show the accuracy of location determination with increasing node density.