Underwater acoustic networks in a rapidly growing area of research as it finds different applications for monitoring and collecting data for environmental studies and military surveillance. The need for creating a new set of protocols optimized acoustic communication arises from the major differences in the underwater acoustic communication and terrestrial radio communication. Energy efficiency...

The use of sensor networks in aquatic environments has been quite limited, partially due to the harsh underwater environments and associated high system costs. Nevertheless, cost-effective and resource-efficient Underwater Wireless Sensor Networks (UWSNs) will bring significant benefits to numerous aquatic applications. The unique properties of underwater environments raise many new challenges ...

In this paper, we propose a new metric to measure the spatial reuse efficiency in networks: the spatial reuse index. We observed that the spatial reuse index in Underwater Sensor Networks (UWSNs) is significantly lower than in RF networks due to the relatively low spreading loss of acoustic signals. As a result, UWSNs generally have much lower network throughput. To address this problem, we pro...

Underwater acoustic sensor network (UASN) is proven to be enabling technology for a variety of applications such as naval surveillance, oil platform monitoring, earthquake and tsunami forewarning and scientific and commercial exploitation of the ocean. UASN is formed by wireless sensor nodes distributed over a certain area within the underwater environment and communicating via acoustic signal....

Considering the energy constraint for fixed sensor nodes and the unacceptable long propagation delay, especially for latency sensitive applications of underwater acoustic sensor networks, we propose a MAC protocol that is latency-optimized and energyefficient scheme and combines the physical layer and the MAC layer to shorten transmission delay. On physical layer, we apply convolution coding an...

One of the long-term goals of this project is to analyze and propose energy-efficient communication techniques for underwater acoustic sensor networks. These techniques aim at consuming as less energy as possible as well as guaranteeing a minimum quality of service. In order to do so, we assume and validate some statistics of the underwater acoustic channels and derive stochastic optimal transm...

In this chapter, we focus on acoustic underwater networks, which utilize acoustic communication links to communicate between the nodes. It is wellknown that RF signals do not propagate well underwater, and the optical signals [1] are useful for short distances and under clear water propagation conditions. For long distances, the Navy has utilized acoustic communication. More recently, there has...

One of the long-term goals of this project is to analyze and propose energy-efficient communication techniques for underwater acoustic sensor networks. These techniques aim at consuming as less energy as possible as well as guaranteeing a minimum quality of service. In order to do so, we assume and validate some statistics of the underwater acoustic channels and derive stochastic optimal transm...

With the advancements of acoustic modem technology that supports better data rates with reliable communications, current research focuses on algorithms those can support such technology in a better way. During the last two decades, many protocols suggested in order to handle the adverse environment of underwater communications. This continued research results in improved performance as compare ...

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...