Center for Embedded Network Sensing

Radio duty cycling has received significant attention in sensor networking literature, particularly in the form of protocols for medium access control and topology management. While many protocols have claimed to achieve significant duty-cycling benefit in theory and simulation, these benefits have often not translated to practice. The dominant factor that prevents the optimal usage of the radio in real deployment settings is time uncertainty between sensor nodes. This poster presents an uncertainty-driven approach to duty-cycling where a model of long-term clock drift is used to minimize duty-cycling overhead.