Ecway Technologies provides IEEE projects and software developments for wireless sensor networks. They propose two energy efficient proactive data reporting protocols called SinkTrail and SinkTrail-S for mobile sink-based data collection in large-scale wireless sensor networks. The protocols allow flexibility for mobile sinks to adapt to changes and do not require GPS devices or predefined landmarks. They establish a logical coordinate system for routing data packets, making the protocols suitable for diverse applications. Both theoretical analysis and simulation results show the protocols reduce control overhead and find shorter routing paths.