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In this paper, an energy efficient optimal relay selection protocol is proposed for underwater wireless sensor networks (UWSNs). Sensor nodes are randomly deployed in a three dimensional underwater network and is partitioned into three zones based on depth. The mid zone contains the relay nodes. Nodes in the relay zone are assigned values on the bases of location and depth. Nodes residing in the center...
In this paper, we propose an optimization scheme for avoiding void zone and minimization of uncertainty in glider's position estimation. Gliders stay at sojourn positions for predefined time. At these stops, self-confidence (s-confidence) and neighbor-confidence (n-confidence) regions are estimated. On the basis of present state of glider, it estimates s-confidence region and share control information...
Underwater acoustic communications are a hastily growing field of research and engineering, which once were exclusively for military applications are now extending into commercial fields. Underwater Wireless Sensor Networks (UWSNs) appeal the research community, facing challenges as sensor nodes have energy constraint and radio signals are not suitable for underwater wireless communication. This paper...
The characteristics of underwater sensor networks are unique and they are much different from terrestrial networks but the importance of both cannot be neglected. However it is much more difficult to sustain a workable environment underwater due to its harsh characteristics which make tasks such as batteries replacement, nodes repairing and other similar factors difficult. Thus the need to efficiently...
From few past years, researchers are attracted towards the unexplored region of earth due to is extreme usefulness and that region is water. As we know 70 % of earth surface is water and only 30 % is land that is already explored well. Due to the presence of useful resources in acoustic environment, researchers felt the need to explore the unexplored world of water. In order to explore the acoustic...
In Underwater Wireless Sensor Networks (UWSNs), reliability is an important factor which effects the overall performance of the network. As the underwater environment is noisy and due to multipath fading and poor link quality, the reliability of the network and data integrity is affected. With cooperative routing, the reliability and the integrity of the data is improved. In this paper two relay nodes...
Recently, Underwater Wireless Sensor Networks (UWSNs) gained much attention of researcher due to its usefulness. Unlike terrestrial sensor networks, radio waves are not suitable for UWSNs due to harsh underwater environment. However, acoustic signals gained advantage over the radio waves for underwater communication. UWSNs have distinct characteristics i.e., high propagation delay, low frequency,...
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