This paper presents novel performance analysis of a MACAbased MAC protocol for underwater networks. MACA is very popular in terrestrial radio networks (such as 802.11) and many papers have presented its performance analysis. However, previously published analysis of such protocols for radio wireless networks typically do not account for propagation delay, high detection and decoding errors that...

Underwater acoustic channels are characterized by long propagation delay, limited available bandwidth and high energy costs. These unique characteristics bring challenges to design media access control (MAC) protocol for underwater sensor networks (UASNs). Especially in data-collection-oriented UASNs, data generated at nodes transmitted hop-by-hop the sink node. The traffic loads undertaken of ...

extensive researches on wireless sensor networks (wsns) have been performed and many techniques have been developed for the data link (mac) layer. most of them assume single-channel mac protocols. in the usual dense deployment of the sensor networks, single-channel mac protocols may be deficient because of radio collisions and limited bandwidth. hence, using multiple channels can significantly ...

Underwater acoustic networks of fixed and autonomous nodes can be a very valuable tool in a number of situations, from environmental monitoring to emergency scenarios (e.g., ships in distress). In this paper, we compare the performance of some MAC protocols for underwater networks in typical scenarios. We consider random access protocols, which provide sufficiently high performance in case of l...

Contention-based medium access control (MAC) protocols for underwater acoustic sensor networks are designed to handle packet collisions that caused by long propagation delays. However, existing known suffer from relatively high collisions, which decrease system performance. To enhance performance, we propose a contention-based MAC protocol employs widely-popular machine learning technique, name...

The Medium Access Control (MAC) layer protocol is the most important part of any network, and considered to be a fundamental that aids in enhancing performance networks communications. However, MAC protocol’s design for underwater sensor (UWSNs) has introduced various challenges. This due long acoustic propagation delay, high mobility, low available bandwidth, error probability. These unique ch...

We use real measurements of the underwater channel to simulate a whole underwater RF wireless sensor networks, including propagation impairments (e.g., noise, interferences), radio hardware (e.g., modulation scheme, bandwidth, transmit power), hardware limitations (e.g., clock drift, transmission buffer) and complete MAC and routing protocols. The results should be useful for designing centrali...

TDMA protocols have attracted a lot of attention for underwater acoustic sensor networks (UWSNs), because of the unique characteristics of acoustic signal propagation such as great energy consumption in transmission, long propagation delay and long communication range. Previous TDMA protocols all allocated transmission time to nodes based on discrete time slots. This paper proposes an efficient...

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 acoustic sensor networks (UASNs) are often used for environmental and industrial sensing in undersea/ocean space, therefore, these networks are also named underwater wireless sensor networks (UWSNs). Underwater sensor networks are different from other sensor networks due to the acoustic channel used in their physical layer, thus we should discuss about the specific features of these ...