DefinePK

Abstract

Underwater acoustic sensor networks (UASN) have fascinated in recent years and grown rapidly with the longing to monitor the enormous portion of the world, wrapped up by the oceans. The acoustic wave has been used as a physical layer technology for monitoring the long-range applications in underwater with a few drawbacks. These networks deal with variable propagation delay, energy constraints and limited bandwidth that is strenuous for designing a substantial Medium Access Control (MAC) protocol for underwater sensor networks. In this paper, we have illustrated the applications of UASN and deliberately pointed out the advantages of using sensor technologies in deep oceans. On another fold, we have developed a hybrid based MAC protocol for time-critical applications. The proposed MAC is a cluster based protocol which helps to increase the lifetime of sensor nodes. To reinforce the channel efficiency, the multilevel scheduling in data phase is initiated with two queues depending on the priorities fixed by the cluster head. With this promising scheduling, we could eliminate the waiting time of the sensor nodes and achieves the higher throughput. The simulation results indicate that hybrid based MAC protocol increases network throughput, and reduces the end to end delay.