Published Paper Details:

Underwater Sensor Networks (UWSNs) are capable to explore the many unrevealed natural resources beneath the water, such as lakes, ponds, rivers, seas, and oceans. Futher there are so many challenges to be faced during the design of UWSN system due to the random nature of water waves. But, perhaps the most significant challenge in UWSNs is how to transfer the packets efficiently with minimum energy cost to the surface sink through the water waves. This can be achieved by employing geographic and opportunistic routing schemes to transfer the packets at the surface sink reliably in cooperation with relay nodes. In this paper, a new routing protocol called the Reputation based Geographic and Cooperative Opportunistic Routing Protocol (RGCORP) is developed using NS2, where data packets are routed from source node to the surface sink with the aid of relay nodes. In RGCORP protocol, initially, a relay forwarding set is being determined by the source node on basis of depth data, then weighting scheme is used to choose the best relay node from the relay forwarding set. The weight calculation is performed on normalized energy, packet delivery probability and normalized distance of the forwarding node to the known surface sink. The main purpose of developing the RGCORP protocol is to enhance packet delivery by using reputation values. Further the performance metrics of RGCORP are examined.