Abstract: A new adaptive duty cycle algorithm based on traffic prediction was proposed for WSNs,named AdcbTP.AdcbTP predicts the future traffic and estimates duty cycle on the basis of the predicted values,and then adaptively controls duty cycle of SMAC protocol.In the macro scale of work periods,it works out theoretic duty cycle value using traffic prediction model,and implements rough prediction control to duty cycle.In the micro scale of sleep/listen periods,it implements subtle incremental adjustment to duty cycle.NS2 simulations show little variance between the predicated value and the real value.Furthermore,extensive simulations on energy exhausting and latency simulation show that AdcbTP saves energy greatly without loss of latency.

Key words: Wireless sensor networks,Time series,Traffic prediction,Duty cycle,SMAC