Topology control through depth adjustment and transmission power control for UWSN routing protocols

Recently Underwater Sensor Networks (UWSNs) have been suggested as a powerful technology for many civilian and military applications, such as tactical surveillance. The most important issue in these networks is the communication, mainly due to the presence of fading, multi-path and refractive properties of the sound channel, this necessitate the development of precise underwater channel model for each application and provide an efficient routing protocol that consider the energy constraint of underwater nodes and resolve the problem of disconnected nodes. In this work, we study the impact of two topology control methods, that are used to resolve the problem of void/isolated nodes appeared in geographic routing protocols, in network performance. Simulation results of topology control through Depth adjustment DA and Transmission Power Controls TPC showed a significant reduction of the number of void/isolated nodes.