Kafi, Mohamed AmineDjenouri, DjamelBen Othman, JalelOuadjaout, AbdelraoufBadache, Nadjib2014-07-092014-07-092014-07-07http://dl.cerist.dz/handle/CERIST/679Event 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.Wireless sensor networkstransport protocolscongestion controlCongestion DetectionTechnical ReportCERIST-DTISI/RR--14-0000000020--dz