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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 197592, 10 pages
http://dx.doi.org/10.1155/2012/197592
Research Article

Location Privacy and Energy Preservation in Sensor Allocation Systems

Computer Engineering Department, King Fahd University of Petroleum and Minerals, Box 1392, Dhahran 31261, Saudi Arabia

Received 29 January 2012; Revised 15 April 2012; Accepted 24 May 2012

Academic Editor: Yingshu Li

Copyright © 2012 Hosam Rowaihy. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We propose sensor-to-task assignments algorithms that take into account location privacy issues. Our solutions enable the network to choose the “best” assignment of the available sensors to the tasks to maximize the utility of the network while preserving sensors’ location privacy. We focus on preserving the sensors’ locations during the assignment process in contrast to previous works, which considered location privacy while sensors are in operation. We also propose an energy-based algorithm that uses the remaining energy of a sensor as a factor to scale the distance between a sensor and a task such that sensors that have more energy appear to be closer than ones with less energy left. This does not only provide location privacy but will also consume the sensing resources more evenly, which leads to extending the lifetime of the network. From our simulations, we found that our algorithms can successfully hide sensors’ locations while providing performance close to the algorithms, which use the exact locations. In addition, our energy-based algorithm, while achieving results close to the exact location algorithm, was found to increase the network lifetime by as much as 40%.