Abstract
Congestion in wireless sensor networks usually occurs when the traffic is heavy. Buffer management determines how to drop or buffer the arriving packet when congestion occurs. This paper presents a buffer management algorithm for wireless sensor nodes. The algorithm has four advantages: First, this algorithm is based on spatial correlation of sensing data, it can drop the most redundant data instead of useful data; Second, the algorithm ensure fairness among the stream on the view of spatiality; Third, the algorithm is an active buffer management algorithm, it can drop packet early in order to buffer burst application data; Finally, the algorithm only needs one floating-point calculation, it is fit for the sensor nodes.
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