Ad hoc localization technique for wireless sensor networks

N. Shah; I. Zeid

doi:10.1117/12.630144

24 October 2005 Ad hoc localization technique for wireless sensor networks

N. Shah, I. Zeid

Proceedings Volume 6011, Performance, Quality of Service, and Control of Next-Generation Communication and Sensor Networks III; 60110A (2005) https://doi.org/10.1117/12.630144
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

Location-awareness is a key enabler for using energy-conserving protocols and other location-based services in Wireless Sensor Networks (WSN). Due to the ad hoc nature of WSN, and resource-constrained sensor nodes, the localization technique must be infrastructure-free, computationally simple, and energy-efficient. In this paper we present an ad hoc localization technique that satisfies these requirements. The proposed localization technique is infrastructure-free, anchor-free, and is computationally efficient with reduced communication. We use a novel combination of TOA/TDOA and AOA ranging techniques to detect and estimate ranges between neighbors. Using this information we construct unidirectional coordinate systems to avoid the reflection ambiguity. This reduces the amount of information, and thus communication, required to induce location-awareness in sensor nodes. We then compute node positions using a transformation matrix [T] which reduces the computational complexity of the localization algorithm while computing positions relative to the fixed coordinate system.

Citation Download Citation

N. Shah and I. Zeid "Ad hoc localization technique for wireless sensor networks", Proc. SPIE 6011, Performance, Quality of Service, and Control of Next-Generation Communication and Sensor Networks III, 60110A (24 October 2005); https://doi.org/10.1117/12.630144

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