Background: It is important to improve the quality of service by using congestion detection
technology to find the potential congestion as early as possible in wireless sensor network.
Methods: So an improved congestion control scheme based on traffic assignment and reassignment
algorithm is proposed for congestion avoidance, detection and mitigation. The congestion area of
the network is detected by predicting and setting threshold. When the congestion occurs, sensor
nodes can be recovery quickly from congestion by adopting reasonable method of traffic reassignment.
And the method can ensure the data in the congestion areas can be transferred to noncongestion
areas as soon as possible.
Results: The simulation results indicate that the proposed scheme can reduce the number of loss
packets, improve the throughput, stabilize the average transmission rate of source node and reduce
the end-to-end delay.
Conclusion: So the proposed scheme can enhance the overall performance of the network. Keywords:
wireless sensor network; congestion control; congestion detection; congestion mitigation;
traffic assignment; traffic reassignment.