SinkTrail: A Proactive Data Reporting Protocol for Wireless Sensor Networks
In large-scale wireless sensor networks, leveraging data sinks' mobility for data gathering has drawn substantial interests in recent years. Current researches either focus on planning a mobile sink's moving trajectory in advance to achieve optimized network performance, or target at collecting a small portion of sensed data in the network. In many application scenarios, however, a mobile sink cannot move freely in the deployed area. Therefore, the pre-calculated trajectories may not be applicable. To avoid constant sink location update traffics when a sink's future locations cannot be scheduled in advance, the authors propose two energy-efficient proactive data reporting protocols, SinkTrail and SinkTrail-S, for mobile sink based data collection. The proposed protocols feature low-complexity and reduced control overheads.