Underwater sensor network (UWSN) has emerged as a powerful technique for aquatic applications. Different from ground based networks, UWSN features long propagation delay, low bandwidth and high error rate. Limited power capacity and node mobility also make it difficult to apply existing protocols or algorithm designed for terrestrial networks to UWSN. It requires new research at every layer of ...

Underwater acoustic sensor networks (UASNs) consist of movable and stationary nodes, which usually communicate using the acoustic channel. Underwater acoustic communication networks are particularly susceptible to malicious attacks due to the high transmission power requirements, rapidly changing channel characteristics, multi-path echoes, high bit error rates, high ambient noise, high and vary...

In this paper, we propose an underwater wireless sensor network (UWSN) named SOUNET where sensor nodes form and maintain a tree-topological network for data gathering in a self-organized manner. After network topology discovery via packet flooding, the sensor nodes consistently update their parent node to ensure the best connectivity by referring to the timevarying neighbor tables. Such a persi...

Nuclear power provides a significant portion of our current energy demand and is likely to become more wide spread with growing world population. However, the radioactive waste generated in these power plants must be stored for around 60 years in underwater storage pools before permanent disposal. These underwater storage environments must be carefully monitored and controlled to avoid an envir...

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...

In Underwater Wireless Sensor Networks (UWSNs), the geographic routing is a preferred choice for data transmission due to the unique characteristics of underwater environment such as the three dimensional topology, the limited bandwidth and power resources. This paper focuses on underwater routing protocols in the network layer, where underwater sensor nodes can collaborate with each other to t...

Underwater sensor network has attracted significant attention recently [1] [2]. On the one hand, it enables a wide range of aquatic applications. On the other hand, harsh underwater environments pose grand challenges to underwater communication and networking. Firstly, acoustic channels have high error probability, long propagation delay and limited bandwidth. Secondly, underwater sensor nodes ...

This paper explores architecture, research challenges and potential applications for underwater sensor networks. Sensor networks have the promise of revolutionizing many areas of science, industry, and government with their ability to bring computation and sensing into the physical world. This report summarizes our research directions in underwater sensor networks. We highlight potential applic...

Underwater sensor networks (UWSN) resemble terrestrial sensor networks in many aspects. However, the high propagation delay and limited bandwidth make terrestrial sensor network’s protocols unsuitable for UWSN. For instance, routing protocols proposed for terrestrial networks are not applicable in an underwater network. Therefore, enormous efforts have been made for designing efficient protocol...

Underwater wireless sensor network nodes deployment optimization problem is studied and underwater wireless sensor nodes deployment determines its capability and lifetime. Underwater wireless sensor network if no wireless sensor node is available in the area due to used up energy or any other reasons, the area which is not detected by any wireless sensor node forms coverage holes. The coverage ...