The document introduces SmartDC, a mobility prediction-based adaptive duty cycling scheme designed to monitor user mobility by providing contextual information on time-resolved places and paths. It utilizes techniques like an unsupervised mobility learner and Markov decision processes to enhance accuracy while significantly reducing energy consumption—consuming 81% less energy than periodic sensing and 87% less than context-aware sensing, all while accurately tracking 90% of a user's location changes within a 160-second delay. The study highlights a shift from traditional methods that primarily focus on energy reduction to achieving both efficiency and accuracy in mobility tracking.