Download or read book An Efficient MAC Protocol for Underwater Acoustic Sensor Networks written by Lei Wang and published by . This book was released on 2011 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Efficient Reconfigurable MAC Protocol for Underwater Acoustic Sensor Network written by Khaja Mohammad Shazzad and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Underwater Acoustic Sensor Networks written by Yang Xiao and published by CRC Press. This book was released on 2010-05-19 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed review of underwater channel characteristics, Underwater Acoustic Sensor Networks investigates the fundamental aspects of underwater communication. Prominent researchers from around the world consider contemporary challenges in the development of underwater acoustic sensor networks (UW-ASNs) and introduce a cross-layer approach for effec

Download or read book A MAC Protocol for Ad hoc Underwater Acoustic Sensor Networks written by Borja Peleato and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A medium access control (MAC) protocol is proposed that is suitable for non-synchronized ad-hoc networks, and in particular for the energy-constrained underwater acoustic networks which are characterized by long propagation delays. The protocol exploits the difference in the link lengths between the nodes instead of waiting times proportional to the maximal link length. To do so, it relies on a receiver's ability to tolerate a certain level of interference. By minimizing the length of the hand-shake procedure preceeding the data transmission, the throughput efficiency is increased as compared to the previously proposed protocols, while collision avoidance minimizes the energy consumption.

Download or read book Mobile Ad Hoc Networking written by Stefano Basagni and published by John Wiley & Sons. This book was released on 2013-02-07 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: "An excellent book for those who are interested in learning the current status of research and development . . . [and] who want to get a comprehensive overview of the current state-of-the-art." —E-Streams This book provides up-to-date information on research and development in the rapidly growing area of networks based on the multihop ad hoc networking paradigm. It reviews all classes of networks that have successfully adopted this paradigm, pointing out how they penetrated the mass market and sparked breakthrough research. Covering both physical issues and applications, Mobile Ad Hoc Networking: Cutting Edge Directions offers useful tools for professionals and researchers in diverse areas wishing to learn about the latest trends in sensor, actuator, and robot networking, mesh networks, delay tolerant and opportunistic networking, and vehicular networks. Chapter coverage includes: Multihop ad hoc networking Enabling technologies and standards for mobile multihop wireless networking Resource optimization in multiradio multichannel wireless mesh networks QoS in mesh networks Routing and data dissemination in opportunistic networks Task farming in crowd computing Mobility models, topology, and simulations in VANET MAC protocols for VANET Wireless sensor networks with energy harvesting nodes Robot-assisted wireless sensor networks: recent applications and future challenges Advances in underwater acoustic networking Security in wireless ad hoc networks Mobile Ad Hoc Networking will appeal to researchers, developers, and students interested in computer science, electrical engineering, and telecommunications.

Download or read book Energy Efficient Underwater Acoustic Sensor Networks written by Chaima Zidi and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: UnderWaterAcoustic Sensor Networks (UW-ASNs) are the newest technological achievement in terms of communication. Composed of a set of communicating underwater sensors, UW-ASNs are intended to observe and explore lakes, rivers, seas and oceans. Recently, they have been subject to a special attention due to their great potential in terms of promising applications in various domains (military, environmental, scientific...) and to the new scientific issues they raise. A great challenging issue in UW-ASNs is the fast energy depletion since high power is needed for acoustic communication while sensors battery budget is limited. Hence, energy-efficient networking protocols are of a paramount importance to make judicious use of the available energy budget while considering the distinguishing underwater environment characteristics. In this context, this thesis aims at studying the main challenging underwater acoustic sensors characteristics to design energy-efficient communication protocols specifically at the routing and MAC layers. First, we address the problem of energy holes in UW-ASNs. The sink-hole problem occurs when the closest nodes to sink drain their energy faster due to their heavier load. Indeed, those sensors especially the ones that are 1-hop away from the static sink act as relays to it on behalf of all other sensors, thus suffering from severe energy depletion. In particular, at the routing layer, we propose to distribute the transmission load at each sensor among several potential neighbors, assuming that sensors can adjust their communication range among two levels when they send or forward data. Specifically, we determine for each sensor the set of next hops with the associated load weights that lead to a fair energy depletion among all sensors in the network. Then, we extend our balanced routing strategy by assuming that each sensor node is not only able to adjust its transmission power to 2 levels but eventually up to n levels where n > 2. Consequently, at the routing layer, for each possible value of n, we determine for each sensor the set of possible next hops with the associated load weights that lead to a fair energy consumption among all sensors in the network. Moreover, we derive the optimal number of transmission powers n that balances the energy consumption among all sensors for each network configuration. In addition to that, it is worth pointing out that our extended routing protocol uses a more realistic time varying channel model that takes into account most of the fundamental characteristics of the underwater acoustic propagation. Analytical results show that further energy saving is achieved by our extended routing scheme. Second, to mitigate the dramatic collision impacts, we design a collision avoidance energy efficient multichannel MAC protocol (MC-UWMAC) for UW-ASNs. MC-UWMAC operates on single slotted control and a set of equal-bandwidth data channels. Control channel slots are dedicated to RTS/CTS handshaking allowing a communicating node pair to agree on the start time of communication on a pre-allocated data channel. In this thesis, we propose two novel coupled slot assignment and data channels allocation procedures without requiring any extra negotiation overhead. Accordingly, each node can initiate RTS/CTS exchange only at its assigned slot calculated using a slot allocation procedure based on a grid virtual partition of the deployment area. Moreover, for each communicating pair of nodes, one data channel is allocated using a channel allocation procedure based on our newly designed concept of singleton- intersecting quorum. Accordingly, each pair of communicating nodes will have at their disposal a unique 2-hop conflict free data channel. Compared with existing MAC protocol, MC-UWMAC reduces experienced collisions and improves network throughput while minimizing energy consumption.

Download or read book Efficient Communication Protocols for Underwater Acoustic Sensor Networks written by Dario Pompili and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater sensor networks find applications in oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, tactical surveillance, and mine reconnaissance. The enabling technology for these applications is acoustic wireless networking. UnderWater Acoustic Sensor Networks (UW-ASNs) consist of sensors and Autonomous Underwater Vehicles (AUVs) deployed to perform collaborative monitoring tasks. The objective of this research is to explore fundamental key aspects of underwater acoustic communications, propose communication architectures for UW-ASNs, and develop efficient sensor communication protocols tailored for the underwater environment. Specifically, different deployment strategies for UW-ASNs are studied, and statistical deployment analysis for different architectures is provided. Moreover, a model characterizing the underwater acoustic channel utilization efficiency is introduced. The model allows setting the optimal packet size for underwater communications. Two distributed routing algorithms are proposed for delay-insensitive and delay-sensitive applications. The proposed routing solutions allow each node to select its next hop, with the objective of minimizing the energy consumption taking the different application requirements into account. In addition, a resilient routing solution to guarantee survivability of the network to node and link failures in long-term monitoring missions is developed. Moreover, a distributed Medium Access Control (MAC) protocol for UW-ASNs is proposed. It is a transmitter-based code division multiple access scheme that incorporates a novel closed-loop distributed algorithm to set the optimal transmit power and code length. It aims at achieving high network throughput, low channel access delay, and low energy consumption. Finally, an efficient cross-layer communication solution tailored for multimedia traffic (i.e., video and audio streams, still images, and scalar sensor data) is introduced.

Download or read book Energy Efficient Cluster Based Hybrid MAC Protocol with Channel Dependent Optimized Intra cluster Scheduling written by Jithin Jagannath and published by . This book was released on 2013 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater acoustic sensor networks (UW-ASNs) find place in a wide variety of long term applications such as pollution monitoring, ocean sampling, disaster prevention and tactical surveillance. Since underwater system environment is energy constrained, it is imperative to maximize the network lifetime of UW-ASNs to support these long-term applications. The energy concern is aggravated by the fact that transmit power of underwater acoustic (UW-A) modems are extremely high (2W-20W) thus making it necessary to minimize the loss of energy due to retransmission of the packets lost and reducing control overhead. The objective of this research work was to study various existing medium access control (MAC) protocols for UW-ASNs and to design and implement an energy efficient MAC protocol that would maximize the network lifetime and throughput of UW-ASN while maintaining the reliability of the network. This work proposes a clustered based hybrid MAC protocol with channel dependent optimized scheduling in the intra-cluster phase. This scheduling is accomplished in 2 phases to reduce the communication overhead and computational complexity; (i) in the first phase each member node takes a selfish action (number of time slots required during next cycle) obtained by formulating a Markov's decision process (MDP) with an objective to minimize energy consumption and informs this action to the cluster head, (ii) in the second phase after gathering the action of all its member nodes, the cluster head optimizes the scheduling to maximize throughput of the entire cluster and reduce retransmissions, as a result minimizing energy consumption. The optimization at the cluster head also takes two approaches; (a) a greedy approach which only considers maximizing throughput, (b) along with maximizing throughput, the cluster head also considers the urgency of the member nodes to minimize buffer overflow and improve reliability. Simulations demonstrate that the proposed scheduling scheme with urgency factor achieves a 28% improvement in throughput and improves reliability by upto 25% as compared to the scheduling scheme which does not use MDP and optimization.

Download or read book Underwater Acoustic Networking Techniques written by Roald Otnes and published by Springer Science & Business Media. This book was released on 2012-01-19 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: This literature study presents an overview of underwater acoustic networking. It provides a background and describes the state of the art of all networking facets that are relevant for underwater applications. This report serves both as an introduction to the subject and as a summary of existing protocols, providing support and inspiration for the development of network architectures.

Download or read book Underwater Acoustic Sensor Networks written by Peng Xie and published by . This book was released on 2007 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy efficient Distributed MAC Protocols for Underwater Sensor Networks written by Faisal Alfouzan and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Sensor Networks written by Kazem Sohraby and published by John Wiley & Sons. This book was released on 2007-04-06 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrastructure for Homeland Security Environments Wireless Sensor Networks helps readers discover the emerging field of low-cost standards-based sensors that promise a high order of spatial and temporal resolution and accuracy in an ever-increasing universe of applications. It shares the latest advances in science and engineering paving the way towards a large plethora of new applications in such areas as infrastructure protection and security, healthcare, energy, food safety, RFID, ZigBee, and processing. Unlike other books on wireless sensor networks that focus on limited topics in the field, this book is a broad introduction that covers all the major technology, standards, and application topics. It contains everything readers need to know to enter this burgeoning field, including current applications and promising research and development; communication and networking protocols; middleware architecture for wireless sensor networks; and security and management. The straightforward and engaging writing style of this book makes even complex concepts and processes easy to follow and understand. In addition, it offers several features that help readers grasp the material and then apply their knowledge in designing their own wireless sensor network systems: * Examples illustrate how concepts are applied to the development and application of * wireless sensor networks * Detailed case studies set forth all the steps of design and implementation needed to solve real-world problems * Chapter conclusions that serve as an excellent review by stressing the chapter's key concepts * References in each chapter guide readers to in-depth discussions of individual topics This book is ideal for networking designers and engineers who want to fully exploit this new technology and for government employees who are concerned about homeland security. With its examples, it is appropriate for use as a coursebook for upper-level undergraduates and graduate students.

Download or read book Design of an Energy Efficient MAC Protocol for Sink Based Wireless Sensor Networks written by Kiran Tatapudi and published by . This book was released on 2006 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sensor Networks written by Gianluigi Ferrari and published by Springer Science & Business Media. This book was released on 2010-03-10 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea of this book comes from the observation that sensor networks represent a topic of interest from both theoretical and practical perspectives. The title und- lines that sensor networks offer the unique opportunity of clearly linking theory with practice. In fact, owing to their typical low-cost, academic researchers have the opportunity of implementing sensor network testbeds to check the validity of their theories, algorithms, protocols, etc., in reality. Likewise, a practitioner has the opportunity of understanding what are the principles behind the sensor networks under use and, thus, how to properly tune some accessible network parameters to improve the performance. On the basis of the observations above, the book has been structured in three parts:PartIisdenotedas“Theory,”sincethetopicsofits vechaptersareapparently “detached” from real scenarios; Part II is denoted as “Theory and Practice,” since the topics of its three chapters, altough theoretical, have a clear connection with speci c practical scenarios; Part III is denoted as “Practice,” since the topics of its ve chapters are clearly related to practical applications.

Download or read book Energy Efficient Underwater Wireless Communications and Networking written by Goyal, Nitin and published by IGI Global. This book was released on 2020-09-04 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater wireless sensor networks (UWSN) are envisioned as an aquatic medium for a variety of applications including oceanographic data collection, disaster management or prevention, assisted navigation, attack protection, and pollution monitoring. Similar to terrestrial wireless sensor networks (WSN), UWSNs consist of sensor nodes that collect the information and pass it to a base station; however, researchers have to face many challenges in executing the network in an aquatic medium. Energy-Efficient Underwater Wireless Communications and Networking is a crucial reference source that covers existing and future possibilities of the area as well as the current challenges presented in the implementation of underwater sensor networks. While highlighting topics such as digital signal processing, underwater localization, and acoustic channel modeling, this publication is ideally designed for machine learning experts, IT specialists, government agencies, oceanic engineers, communication experts, researchers, academicians, students, and environmental agencies concerned with optimized data flow in communication network, securing assets, and mitigating security attacks.

Download or read book Stochastic Medium Access Control for Underwater Acoustic Sensor Networks written by Yu Han and published by . This book was released on 2016 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater sensor networks (UWSNs), the enabling technology for a broad range of aquatic applications, rely on acoustic communication for long-range transmissions. However, underwater acoustic communication suffers from several adverse features, such as long propagation delay and low bandwidth, making the networking design for UWSNs much more challenging than their terrestrial counterparts. Medium access control (MAC), a crucial component in networking design, coordinates among multiple agents that share the same channel resource and is responsible to schedule packet transmissions efficiently and fairly. However, due to the long propagation delay, the traditional handshaking-based random-access MAC protocols are not channel efficient for UWSNs. In this dissertation, we address the inefficiency issues in random-access MAC for UWSNs, using a stochastic sending probability-based approach. We propose three handshaking-free underwater MAC solutions targeting the same goal: high network throughput, low packet end-to-end delay, and robustness under dynamics and controlled implementation complexity. The three solutions are based on a common utility-based probability optimization framework, but with different design considerations and objective functions. We first leverage the feature of long propagation delay, often taken as negative, to improve the parallelism between multiple senders. Our proposed protocol, the Delay-Aware Probability-based underwater MAC protocol (DAP-MAC), characterizes the group compatibility relation, a proposed indicator for successful concurrent transmissions, and utilizes this relation in the stochastic optimization framework for the best transmission strategy. The drawback of DAP-MAC is it requires long time slots to accommodate concurrent transmissions. We reduce the slot size and explicitly resolve the unique spatial-temporal uncertainty issue in UWSNs in our proposed protocol, the Traffic-Adaptive Receiver-Synchronized underwater MAC protocol (TARS). In TARS, we consider the data queue status and design the throughput-optimal transmission strategy to be traffic adaptive, which is very suitable for mobile and traffic-varying UWSNs. Simulation results show that TARS achieves the highest throughput and lowest packet delay among the typical representative MACs (about 13% ∼ 146% higher in throughput and 13% ∼ 21% lower in delay than others in a mobile ad hoc network). For further throughput improvement, we consider the capture effect and proactively create power capture at the receivers in our proposed protocol, the Stochastic MAC protocol with Randomized Power control (SMARP). We design a randomized power control scheme based on the non-negligible difference in acoustic propagation attenuation, and include the capture success probability in the stochastic optimization framework. Simulation results show that SMARP yields better throughput and packet delay than TARS and other representative MACs (about 23% ∼ 240% higher in throughput and 27% ∼ 60% lower in delay than others in a mobile ad hoc network). Finally, toward the development of wireless networking for enabling marine observatory capabilities at the Northeastern University Marine Science Center, we implement the TARS protocol on our testbed. We conduct in-tank underwater experiments and evaluate the performance of the TARS protocol under a three-node single-hop network. Experimental results show that TARS achieves the highest packet delivery ratio with controlled low packet end-to-end delay than other representative handshaking-free underwater MAC protocols, and is very suitable for the actual implementation in UWSNs.

Download or read book Wireless Sensor Networks written by Jun Zheng and published by John Wiley & Sons. This book was released on 2009-10-27 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn the fundamental concepts, major challenges, and effective solutions in wireless sensor networking This book provides a comprehensive and systematic introduction to the fundamental concepts, major challenges, and effective solutions in wireless sensor networking (WSN). Distinguished from other books, it focuses on the networking aspects of WSNs and covers the most important networking issues, including network architecture design, medium access control, routing and data dissemination, node clustering, node localization, query processing, data aggregation, transport and quality of service, time synchronization, network security, and sensor network standards. With contributions from internationally renowned researchers, Wireless Sensor Networks expertly strikes a balance between fundamental concepts and state-of-the-art technologies, providing readers with unprecedented insights into WSNs from a networking perspective. It is essential reading for a broad audience, including academic researchers, research engineers, and practitioners in industry. It is also suitable as a textbook or supplementary reading for electrical engineering, computer engineering, and computer science courses at the graduate level.