Congestion Detection Strategies in Wireless sensor Networks: A Comparative Study with Testbed Experiments
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Date
2014-07-07
Journal Title
Journal ISSN
Volume Title
Publisher
CERIST
Abstract
Event based applications of Wireless Sensor Networks (WSNs) are prone to tra c congestion, where unpredicted event detection
yields simultaneous generation of tra c 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. Di erent detection metrics are used in the congestion control
literature. However, a comparative study that investigates the di erent 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
e ectiveness of each method in di erent scenarios and concludes that the combination of bu er length and channel load constitute
the better candidate for early and fictive detection.
Description
Keywords
Wireless sensor networks, transport protocols, congestion control, Congestion Detection