RELIABLE DETECTION OF SIGNAL TONES IN PRESENCE OF COLLISIONS

Milica Jovanović, Igor Stojanović, Sandra Đošić, Goran Đorđević

DOI Number
https://doi.org/10.22190/FUACR1803177J
First page
177
Last page
190

Abstract


A reliable and energy-efficient contention resolution mechanism (CRM) is a crucial component of MAC protocols for wireless sensor networks (WSNs). Among a number of CRM proposals, CRMs based on exchanging short signal tones between competing nodes have recently drawn attention due to their promise of collision-freedom and energy-efficiency. However, the basic assumption of these protocols, i.e. the possibility to reliably detect the presence/absence of signal tone in case of simultaneous transmissions from multiple nodes, has not yet been confirmed. In this paper we present a technique for signal tone generation/detection, which uses only standard features of off-the-shelf RF transmitters. Furthermore, we present results of an experimental validation carried out in a real testbed which demonstrate a high accuracy of signal tone detection in presence of multiple simultaneous transmissions.

Keywords

wireless sensor networks, energy efficiency, intra-cluster communication, signal tones

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References


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DOI: https://doi.org/10.22190/FUACR1803177J

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