Congestion Detection Strategies in Wireless Sensor Networks: A Comparative Study with Testbed Experiments

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Date
2014
Authors
Kafi, Mohamed Amine
Djenouri, Djamel
Ben Othman, Jalel
Ouadjaout, Abdelraouf
Badache, Nadjib
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Event based applications of Wireless Sensor Networks (WSNs) are prone to traffic congestion, where unpredicted event detection yields simultaneous generation of traffic at spatially co-related nodes, and its propagation towards the sink. This results in loss of information and waste energy. Early congestion detection is thus of high importance in such WSN applications to avoid the propagation of such a problem and to reduce its consequences. Different detection metrics are used in the congestion control literature. However, a comparative study that investigates the different metrics in real sensor motes environment is missing. This paper focuses on this issue and compares some detection metrics in a testbed network with MICAz motes. Results show the effectiveness of each method in different scenarios and concludes that the combination of buffer length and channel load constitute the better candidate for early and fictive detection.
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Keywords
Wireless sensor networks , Ttransport protocols , Congestion control , Congestion Detection
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