Abstract
Constraints of the underwater environment pose certain challenges to the design of routing protocols for underwater sensor networks. One such constraint is free mobility of sensor nodes with water currents. Free mobility and asymmetric acoustic propagation characteristics may lead to network partitioning which results in one or more nodes being unable to connect to the rest of the network and thus unable to report their sensed data. In this work, we propose a two-stage routing protocol to enable not only the connected nodes but also the partitioned nodes to successfully report their data thus improving the overall packet delivery ratio. We also introduce a minimum energy threshold and a rerouting scheme to delay death of busier nodes, thereby ensuring that nodes stay alive longer for their sensing job, and to avoid connectivity holes, respectively. Moreover, we also resolve forwarding loops to avoid the unnecessary waste of resources. Our results show that the proposed scheme successfully resolves network partitions and achieves a higher packet delivery ratio while avoiding early death of sensor nodes.
Highlights
Due to the rapid growth of technology in the last fifty years or so, science has ventured to explore and exploit previously unknown resources such as oceans and other water bodies that constitute more than 70% of the planet earth
In case of free mobility of nodes, the architecture will achieve very low packet delivery ratios as the sensor nodes move away from the static sink nodes and cannot receive beacons. These shortcomings dictate the need for network architecture and routing schemes which can efficiently tackle the above mentioned issues related to mobile Underwater wireless sensor networks (UWSNs)
In this work we propose a suitable network architecture and a routing scheme that can handle partitioning in mobile UWSNs and thereby improve network performance by delivering higher volumes of traffic to the sink node
Summary
Due to the rapid growth of technology in the last fifty years or so, science has ventured to explore and exploit previously unknown resources such as oceans and other water bodies that constitute more than 70% of the planet earth. The collected information is used by nodes in the data transmission phase to select a hop node that will maximize the packet delivery ratio and improve energy efficiency This architecture works effectively for networks with static or limitedly mobile nodes. In case of free mobility of nodes, the architecture will achieve very low packet delivery ratios as the sensor nodes move away from the static sink nodes and cannot receive beacons These shortcomings dictate the need for network architecture and routing schemes which can efficiently tackle the above mentioned issues related to mobile UWSNs. In this work we propose a suitable network architecture and a routing scheme that can handle partitioning in mobile UWSNs and thereby improve network performance by delivering higher volumes of traffic to the sink node.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
