Open AccessRELIABLE DETECTION OF SIGNAL TONES IN PRESENCE OF COLLISIONS
Author(s) -
Milica Jovanović,
Igor Ž. Stojanović,
Sandra Đošić,
Goran T. Djordjević
Publication year - 2019
Publication title -
facta universitatis. series: automatic control and robotics
Language(s) - English
Resource type - Journals
eISSN - 1820-6425
pISSN - 1820-6417
DOI - 10.22190/fuacr1803177j
Subject(s) - testbed , computer science , signal (programming language) , detection theory , energy (signal processing) , tone (literature) , real time computing , collision detection , wireless sensor network , collision , computer network , telecommunications , detector , physics , computer security , art , literature , quantum mechanics , programming language
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.