Lifetime prolonging is one of the most significant issues in the research on underwater acoustic sensor networks (UASNs). Unbalanced energy consumption influences greatly the network lifetime. First this study discusses a probability-based energy balance ...

The MAC protocol is one of the most concerned issued for Underwater Acoustic Sensor Networks (UWASNs). Distinguishing with the radio frequency (RF) communication for the terrestrial wireless sensor networks, the peculiarity of acoustic communication ...

Distinguishing with the radio frequency (RF) communication for the terrestrial wireless sensor net-works, the peculiarity of acoustic communication in underwater environment causes many issues of energy consumption, propagation delay, time synchronization ...

Media Access Control (MAC) must be carefully considered in multi-hop Underwater Acoustic Sensor Networks (UASNs) due to limited bandwidth and large propagation delay. In particular, variable propagation delays in UASNs cause inaccurate time synchronization ...

We introduce and study the localization problem in large scale underwater acoustic sensor networks. Considering that depth information is typically available for underwater sensors, we transform the 3D underwater positioning problem into its two-dimensional ...

Underwater sensor networks find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, and tactical surveillance. In this paper, deployment strategies for two-dimensional and ...

Underwater Acoustic Sensor Networks (UW-ASNs) consist of stationary sensors or Autonomous Underwater Vehicles (AUVs) like propeller-driven vehicles and gliders that are equipped with sensors for performing collaborative monitoring tasks. In this paper, ...

As the importance of applications, such as ocean sampling, environmental monitoring, disaster prevention, and distribution tactical surveillance, has recently grown, the need for underwater communication has become more pronounced. In order to perform ...

The requirements of multimedia underwater monitoring applications with heterogeneous traffic demands in terms of bandwidth and end-to-end reliability are considered in this article. To address these requirements, a new medium access control protocol ...

Although there are numerous time synchronization algorithms recently proposed for terrestrial wireless sensor networks, none of these could be directly applied to underwater acoustic sensor networks. This is because they typically assume that the propagation ...

A medium access control (MAC) protocol permits the nodes to access the shared medium by providing contention resolution mechanism. The design of MAC protocol in ad hoc networks becomes a more challenging task due to the interruptible energy source or ...

Underwater sensor networks will find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, and tactical surveillance applications. In this paper, the problem of data gathering ...

In this paper, different deployment strategies for two-dimensional and three-dimensional communication architectures for UnderWater Acoustic Sensor Networks (UW-ASNs) are proposed, and statistical deployment analysis for both architectures is provided. ...

We propose two schemes for routing and placement of mobile data collectors in underwater acoustic sensor networks (UASNs): the delay tolerant placement and routing (DTPR) and the delay constrained placement and routing (DCPR). As their names reveal, ...