In some underwater sensor networks, sensor nodes may be deployed at various depths of an ocean making those networks threedimensional (3D). While most terrestrial sensor networks can usually be modeled as two dimensional (2D) networks, these underwater sensor networks must be modeled as 3D networks. This leads to new research challenges in the area of network architecture and topology. In this ...

Underwater acoustic wireless sensor networks (UAWSNs) are capable of supporting underwater missions. Due to the unique characteristics of underwater environments e.g. large attenuation and long propagation delay, the transmission range of sensor nodes in UA-WSNs is usually much shorter than that of the terrestrial counterparts, which limits communications between sensors and makes the system in...

Tracking underwater targets is a focused application area in modern underwater defence systems. Using traditional techniques based on imaging or sensor arrays may be difficult and impractical in some mission-critical systems. Alternatively, the underwater wireless sensor network UWSN is able to offer a promising solution. This paper tackles the problem of accurately tracking underwater targets ...

Underwater wireless sensor networks consist of a certain number of sensors and vehicles that interact to collect data and perform collaborative tasks. Designing energy-efficient routing protocols for this type of networks is essential and challenging because sensor nodes are powered by batteries, which are difficult to replace or recharge, and because underwater communications are severely affe...

Underwater wireless optical communication has been used for establish a link between mobile vehicles and/or fixed nodes because light, especially in the blue/green region, allows to achieve higher data-rate than acoustical or electromagnetic waves for moderate distances. The here proposed work has the aim to pave the way for diffuse optical communication allowing to support optical communicatio...

Water covers more than 70% of the planet, contains much of its natural resources, and defines the greater territories of many nations. With the increasing use of underwater sensors for the exploitation and monitoring of vast underwater resources, underwater wireless sensor network (UWSN), mostly based on acoustic transmission technologies, have been developing steadily in terms of operation ran...

This paper reviews the existing localization techniques and parameters in Wireless Sensor Networks (WSNs) and few schemes are discussed in term of Terrestrial WSNs. The fundamental differences between Underwater and Terrestrial WSN are highlighted. Furthermore, the paper analyzes the few existing aquatic localization schemes and presents a discussion in two parts including general localization ...

Understanding the dynamics of bodies of water and their impact on the global environment requires sensing information over the full volume of water. In this article, we develop a gradient-based decentralized controller that dynamically adjusts the depth of a network of underwater sensors to optimize sensing for computing maximally detailed volumetric models. We prove that the controller converg...

In this paper, we tackle the malicious attacks in Underwater Sensor Networks (UWSNs). Underwater Sensor Networks (UWSNs) consists of variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area. In this paper, we use a novel routing protocol, called vector-based forwarding (VBF) protocol, to provide robust, scalable and energy efficient r...