Selfish nodes detection mechanism and stimulation mechanism over mobile peer-to-peer networks

The nodes over mobile peer-to-peer networks often show selfish behavior for their limited resource and different interest. So detecting and stimulating selfish nodes to cooperate is a new important research topic. Through allowing nodes to freely express their subjective forwarding willing, the detection mechanism is implemented. Through punishing nodes which have a higher selfish degree than given threshold or lie about its information, the stimulation mechanism is implemented. Simulation results show that the detection mechanism and stimulation mechanism not only can discover appropriate routing, but also can stimulate selfish nodes to actively cooperate when the degree of nodes´ selfishness is excessive.