An incentive detection mechanism for cooperation of nodes selfish behavior in wireless sensor networks

In Wireless Sensor Networks (WSNs), According to the selfish behavior of nodes have seriously effects on the overall performance of networks, an Incentive Detection Mechanism (IDM) for cooperation of nodes selfish behavior was proposed. This mechanism consists of two parts which are detecion module based on retransmission numbers and punishment module.The detection module determines if there is a selfish behavior in the networks by collecting average retransmission numbers of nodes itselves and finding the maximum value of average retransmission numbers, then comparing the difference of average retransmission numbers and maximum value with the set threshold value; The punishment module change the strategy of selfish nodes for cooperation with normal nodes so that the network performance can improve. The NS2 simulation tool was conducted to validate the performance of the detection mechanism, the experimental results show that the IDM can improve the detecting rate and lower the false detecting rate in appropriately selected detection mechanism parameters, and every node link can obtain a relatively fair throughput to improve the performance of overall networks when following the mechanism of proposed.