Datum: Dynamic Topology Control For Underwater Wireless Multimedia Sensor Networks

In this paper, the problem of dynamic topology management in underwater wireless multimedia sensor networks (UWMSNs) in the presence of underwater wireless multimedia sensor nodes is studied using cooperation game theory. In the existing literature, researchers focused on the efficient management of underwater sensor networks and terrestrial wireless multimedia sensor networks. However, in the presence of underwater multimedia wireless sensor nodes, the amount of data to be transmitted increases significantly which deteriorates the overall network performance. Hence, there is a need to design a delay-optimal dynamic topology control scheme for UWMSNs, while maximizing the network throughput and lifetime. In this work, we propose a cooperative game theory-based scheme, named DATUM, for dynamic topology control. In DATUM, initially, we explore the feasible data transmission path available from the source node at seabed to the sink node at the surface of the ocean. Thereafter, using cooperation game theory, we identify the set of optimal paths to be selected. Finally, in DATUM, each underwater wireless multimedia sensor node decides its optimum transmission communication range for maximizing the network lifetime, while ensuring the network connectivity. Through simulation, we observed that using DATUM, network delay reduces by 30.74 percent, while the network lifetime increases by 59.61 percent.