نتایج جستجو برای: underwater mac protocols

تعداد نتایج: 141928  

2013
Huifang Chen Guang-yu Fan Lei Xie Jun-Hong Cui

Due to the characteristics of underwater acoustic channel, media access control (MAC) protocols designed for underwater acoustic sensor networks (UWASNs) are quite different from those for terrestrial wireless sensor networks. Moreover, in a sink-oriented network with event information generation in a sensor field and message forwarding to the sink hop-by-hop, the sensors near the sink have to ...

2017
Alak Roy Nityananda Sarma

Underwater wireless sensor networks (UWSNs) has gained attention to researcher due to their wide range of applications. However, due to their power constrains and limitations, an energy efficient MAC protocol is required. Existing MAC protocols for terrestrial WSNs are not sufficient to solve the issues in UWSNs. Therefore, to design a new MAC protocol for UWSNs it is required to study the fact...

2006
John Heidemann Yuan Li Affan Syed Jack Wills Wei Ye

This report summarizes our research directions in underwater sensor networks. We highlight potential applications to off-shore oilfields for seismic monitoring, equipment monitoring, and underwater robotics. We identify research directions in short-range acoustic communications, MAC, time synchronization, and localization protocols for highlatency acoustic networks, long-duration network sleepi...

2011
Roberto Petroccia Chiara Petrioli Paolo Casari Giancarlo Bongiovanni Loreto Pescosolido Wouter van Kleunen Yonca Bayrakdar Nirvana Meratnia Paul Havinga

Document Overview In the present deliverable, we briefly summarize the current trends and state-of-the-art on networking solutions for Underwater Wireless Acoustic Sensor Networks (UWASNs). In particular, the focus of the document is on Medium Access Control (MAC), Routing, Localization and Synchronization, as well as on node positioning and mobility. Our literature search points out that, alth...

2009
Diba Mirza Feng Lu Curt Schurgers

I. PROBLEM DESCRIPTION Underwater sensor networks present a unique set of challenges due their long propagation delays, low data rates, and high transmit power. These require a thorough redesign of medium access control (MAC) functionalities. Here, we focus on the important case of a broadcast MAC, where all neighbors of a node are the intended receivers (not to be confused with network-layer b...

2007
Peng Xie Jun-Hong Cui

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...

2007
Hung Trong Nguyen Soo Young Shin Soo-Hyun Park

Many potential applications such as ocean sampling network, environment monitoring, undersea exploration, disaster prevention, assisted navigation, and mine reconnaissance can be provided by deploying the Underwater Acoustic Sensor Networks. Because of the peculiarities of acoustic communication in underwater, the MAC protocol which play a role of managing and controlling the channels, must ove...

2008
Zhong Zhou Zheng Peng Jun-Hong Cui

The focus of this paper is on the multi-channel MAC protocols for underwater acoustic sensor networks. We model and analyze two generalized multi-channel MAC protocols: multi-channel access with Aloha on a dedicated control channel and multi-channel access with RTS/CTS on a dedicated control channel. Though the long delay feature of underwater acoustic channels drastically increases the complex...

Journal: :Computer Communications 2015
Lina Pu Yu Luo Haining Mo Son N. Le Zheng Peng Jun-Hong Cui Zaihan Jiang

Underwater acoustic networks (UANs) have drawn significant attention from both academia and industry in recent years. Even though a number of underwater MAC protocols have been proposed and studied based on simulations and theoretical analysis, few work has been conducted to test these protocols in multi-hop real sea experiments. Due to the complex multipath environment, fast varying acoustic c...

2011
Elsa M. Macías Álvaro Suárez Sarmiento Francesco Chiti Andrea Sacco Romano Fantacci

The interest in monitoring applications using underwater sensor networks has been growing in recent years. The severe communication restrictions imposed by underwater channels make that efficient monitoring be a challenging task. Though a lot of research has been conducted on underwater sensor networks, there are only few concrete applications to a real-world case study. In this work, hence, we...

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