Review Article TIME-SYNCHRONIZATION IN UNDERWATER SENSOR NETWORKS

In this Paper we propose on Time- Synchronization underwater sensor-network. Energy consumption is one of the most challenging constraints for the design and implementation of sensor networks. As sensor nodes are commonly battery-driven, the way the available energy is used determines the lifetime of the system. In recent research, a variety of approaches has been investigated to predict energy consumption of-line using simulation, emulation, code analysis and energy models of hardware components. However, for a wide range of applications the run-time behavior is dictated by sensor measurements or external events, allowing only a worst case analysis before deployment. In this paper, we investigate different approaches to derive energy characteristics during run-time and to adapt or reconfigure the applications running on individual sensor node