The features of underwater wireless sensor networks are different from those found in the terrestrial ones, while their architecture is penetrable to several issues such as huge propagation delays, limited bandwidth, and multiple messages receptions due to reflections on the sea surface. It also depends on the flexibility of floating sensor nodes. Underwater sensor network has flowed as a powerful technique for aquatic applications. A Sleep Scheduling strategy is a feasible scheme built on tree topology combining TDMA with duty-cycling. Hence TDMA has time slots, so here is no data collision in this network. ROSS, a Receiver Oriented Sleep scheduling strategy use TDMA based on tree topology. But they have not given any solution to the Energy hole problem. They have no data recovery option, if any node has missed data when they die. In this paper we have proposed a mechanism to save transaction time compare to traditional UWSNs MAC protocol.
