Abstract
Congestion in wireless sensor networks (WSNs) not only affects transmission reliability, and will waste valuable energy resources. In order to reduce the wireless sensor networks routing instability, a congestion avoidance and alleviation (CAA) routing protocol. In this work, we address the problem of congestion in the sensor networks. Our primary objective in using this approach is to adaptively detect the potential congestion timely and effective; make data packet arrival rate in the nodes equal to packet service rate, so that the occurrence of congestion in the nodes is seamlessly avoided. Once congestion happens inevitably, CAA is presented to reallocate traffic with altering route protocol to mitigate congestion, avoid conflict, enhances data transmission reliability of CH; Congestion data local preservation strategies, it effectively avoid data lost during the congestion period and guarantee the reliability of data transmission . The results shows have shown that the proposed algorithm is capable of successfully avoiding congestion requiring reliable networks.
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