The energy problem has become one of the critical factors limiting development underwater wireless sensor networks (UWSNs), and cooperative multiple-input–multiple-output (MIMO) technology shown advantages in saving. However, design energy-efficient MIMO techniques does not consider actual environment, such as distribution nodes. Underwater magnetic induction (MI)-assisted acoustic WSNs a promi...

Underwater acoustic communication is widely used in many areas to collect the data from different kinds of sensors deployed underwater or send control information to remote nodes. However, there are many challenges for underwater communication systems because of the characteristics of acoustic propagation in the underwater environment, such as Doppler spread, ambient noise, fading, high propaga...

Despite being a fundamental networking primitive, data broadcasting has so far received little attention in the context of underwater networks. This paper proposes an adaptive push system for data broadcasting in underwater acoustic wireless networks with locality of client demands. The proposed system exploits the characteristic relationship between the bandwidth of an underwater acoustic link...

In Underwater Acoustic Sensor Networks (UASN) designing Medium Access Control (MAC) protocol is a challenging issue. This is due to low bandwidth and high propagation delay in UASN. This paper proposes a MAC protocol for UASN called Aloha with Virtual Back off Algorithm (AlohaV). The VBA approach is the collision avoidance mechanism for wireless networks. In this proposed work we use VBA with n...

Underwater acoustic communication and networks have attracted significant attention in recent years, with applications ranging from ocean monitoring to off-shore sensor control, and port surveillance. Experimental data are required to test and develop effective underwater networking protocols before underwater networks can be successfully deployed for real world applications. Unfortunately, the...

Underwater Sensor Networks (UWSN) have many potential applications, such as ocean exploration, pollution monitoring, public safety and military underwater surveillance [1]. In all of these applications, localization plays an important rule since detected events must be tagged with position information. Moreover, position may also be required for geographical routing. GPS is not available in und...

Underwater acoustic wireless sensor networks (UAWSNs) have many applications across various civilian and military domains. However, they suffer from the limited available bandwidth of acoustic signals and harsh underwater conditions. In this work, we present an Orthogonal Frequency Division Multiple Access (OFDMA)-based Media Access Control (MAC) protocol that is configurable to suit the operat...

Underwater sensor networks have received growing interests recently [7], [5], [4], [1]. Compared with traditional techniques used in underwater activities such as scientific exploration and commercial exploitation, underwater sensor networks empower people to monitor or detect phenomena more accurately and timely in extended areas. The medium access control (MAC) protocol is very important to t...