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Author: Alexander Mueller Publisher: VDM Publishing ISBN: 9783836424363 Category : Computers Languages : en Pages : 124
Book Description
In the last few years WLANs have become more and more popular, enabling access to the Internet and to private or company-internal networks all over the place. With the increasing amount of users sharing one and the same medium, running demanding applications with the need of exchanging larger and larger quantities of data, the necessity has grown to provide information interchange with satisfactory quality of service (QoS). The latter property requires among other things a MAC protocol enabling an efficient and fair medium access for competing network participants. In this book, different MAC schemes are investigated under the aspect of QoS, examining their efficiency and displaying their strengths and weaknesses. Those key elements which influence the QoS are tried to be analyzed and based on these results some propositions are presented which could be implemented in a new protocol to provide a satisfying QoS. The intention of this book is to help the reader get familiarized with existing MAC protocols, allow deeper understanding of the general functionality of medium access mechanisms and enable certain acquirement of sensitivity in the context of recognizing MAC scheme immanent problems. The book is aimed at computer scientists, students and interested readers who want to understand in more detail one of the main elements of QoS to efficiently support wireless data communication.
Author: Alexander Mueller Publisher: VDM Publishing ISBN: 9783836424363 Category : Computers Languages : en Pages : 124
Book Description
In the last few years WLANs have become more and more popular, enabling access to the Internet and to private or company-internal networks all over the place. With the increasing amount of users sharing one and the same medium, running demanding applications with the need of exchanging larger and larger quantities of data, the necessity has grown to provide information interchange with satisfactory quality of service (QoS). The latter property requires among other things a MAC protocol enabling an efficient and fair medium access for competing network participants. In this book, different MAC schemes are investigated under the aspect of QoS, examining their efficiency and displaying their strengths and weaknesses. Those key elements which influence the QoS are tried to be analyzed and based on these results some propositions are presented which could be implemented in a new protocol to provide a satisfying QoS. The intention of this book is to help the reader get familiarized with existing MAC protocols, allow deeper understanding of the general functionality of medium access mechanisms and enable certain acquirement of sensitivity in the context of recognizing MAC scheme immanent problems. The book is aimed at computer scientists, students and interested readers who want to understand in more detail one of the main elements of QoS to efficiently support wireless data communication.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Wireless networks are becoming very common due to their advantages such as rapid deployment and support for mobility. In this dissertation, we design and analyze the Medium Access Control (MAC) protocol for two popular wireless networks: Wireless Sensor Networks (WSNs) and Wireless Local Area Networks (WLANs). For WSNs, we design and analyze an energy efficient MAC protocols. Energy efficiency is a key design factor of a MAC protocol for WSNs. Existing preamble-sampling based MAC protocols have large overheads due to their preambles and are inefficient at large wakeup intervals. Synchronous scheduling MAC protocols minimize the preamble by combining preamble sampling and scheduling techniques; however, they do not prevent energy loss due to overhearing. In this dissertation, we present an energy efficient MAC protocol for WSNs, called AS-MAC, that avoids overhearing and reduces contention and delay by asynchronously scheduling the wakeup time of neighboring nodes. We also provide a multi-hop energy consumption model for AS-MAC. To validate our design and analysis, we implement the proposed scheme on the MICAz and TELOSB platforms. Experimental results show that AS-MAC considerably reduces energy consumption, packet loss and delay when compared with other energy efficient MAC protocols. For WLANs, we present a saturation throughput model for IEEE 802.11, the standard of WLAN, for a simple infrastructure scenario with hidden stations. Despite the importance of the hidden terminal problem, there have been a relatively small number of studies that consider the effect of hidden terminals on IEEE 802.11 throughput. Moreover, existing models are not accurate for scenarios with the short-term unfairness. In this dissertation, we present a new analytical saturation throughput model for IEEE 802.11 for a simple but typical infrastructure scenario with small number of hidden stations. Simulation results are used to validate the model and show that our model is extremely accura.
Author: Srinivas Aluru Publisher: Springer ISBN: 3540772200 Category : Computers Languages : en Pages : 687
Book Description
This book constitutes the refereed proceedings of the 14th International Conference on High-Performance Computing, HiPC 2007, held in Goa, India, in December 2007. The 53 revised full papers presented together with the abstracts of five keynote talks were carefully reviewed and selected from 253 submissions. The papers are organized in topical sections on a broad range of applications including I/O and FPGAs, and microarchitecture and multiprocessor architecture.
Author: Santhosh K V Publisher: Springer Nature ISBN: 9811603367 Category : Technology & Engineering Languages : en Pages : 503
Book Description
This book presents the select proceedings of Control Instrumentation and System Conference, (CISCON 2020) held at Manipal Institute of Technology, MAHE, Manipal. It examines a wide spectrum covering the latest trends in the fields of instrumentation, sensors and systems, and industrial automation and control. The topics covered include image and signal processing, robotics, renewable energy, power systems and power drives, performance attributes of MEMS, multi-sensor data fusion, machine learning, optimization techniques, process control, safety monitoring, safety critical control, supervisory control, system modeling and virtual instrumentation. The book is a valuable reference for researchers and professionals interested in sensors, adaptive control, automation and control and allied fields.
Author: Feng Xia Publisher: Springer ISBN: 366246361X Category : Computers Languages : en Pages : 98
Book Description
This book provides a literature review of various wireless MAC protocols and techniques for achieving real-time and reliable communications in the context of cyber-physical systems (CPS). The evaluation analysis of IEEE 802.15.4 for CPS therein will give insights into configuration and optimization of critical design parameters of MAC protocols. In addition, this book also presents the design and evaluation of an adaptive MAC protocol for medical CPS, which exemplifies how to facilitate real-time and reliable communications in CPS by exploiting IEEE 802.15.4 based MAC protocols. This book will be of interest to researchers, practitioners, and students to better understand the QoS requirements of CPS, especially for healthcare applications.
Author: David Munoz Publisher: Academic Press ISBN: 0080921930 Category : Technology & Engineering Languages : en Pages : 297
Book Description
This book is the definitive guide to the techniques and applications of position location, covering both terrestrial and satellite systems. It gives all the techniques, theoretical models, and algorithms that engineers need to improve their current location schemes and to develop future location algorithms and systems. Comprehensive coverage is given to system design trade-offs, complexity issues, and the design of efficient positioning algorithms to enable the creation of high-performance location positioning systems. Traditional methods are also reexamined in the context of the challenges posed by reconfigurable and multihop networks. Applications discussed include wireless networks (WiFi, ZigBee, UMTS, and DVB networks), cognitive radio, sensor networks and multihop networks. Features - Contains a complete guide to models, techniques, and applications of position location - Includes applications to wireless networks, demonstrating the relevance of location positioning to these "hot" areas in research and development - Covers system design trade-offs and the design of efficient positioning algorithms, enabling the creation of future location positioning systems - Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms David Muñoz is Director and César Vargas is a member of the Center for Electronics and Telecommunications, Tecnológico de Monterrey, Mexico. Frantz Bouchereau is a senior communications software developer at The MathWorks Inc. in Natick, MA. Rogerio Enríquez-Caldera is at Instituto Nacional de Atrofisica, Optica y Electronica (INAOE), Puebla, Mexico. - Contains a complete guide to models, techniques and applications of position location - Includes applications to wireless networks (WiFi, ZigBee, DVB networks), cognitive radio, sensor networks and reconfigurable and multi-hop networks, demonstrating the relevance of location positioning to these 'hot' areas in research and development - Covers system design trade-offs, and the design of efficient positioning algorithms enables the creation of future location positioning systems - Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms
Author: Dinesh Moparthi Publisher: LAP Lambert Academic Publishing ISBN: 9783659106712 Category : Languages : en Pages : 52
Book Description
Wireless Sensor node is a tiny device which are capable of sensing, transmitting and computing data. Generally the nodes are powered by battery for energy, so energy is most important resource in sensor networks. Mostly the power consumption in the node is due to transceiver or radio in the node. By energy efficient design of the MAC layer protocol we can reduce the power consumed by radio. In this report S-MAC an energy efficient MAC protocol is studied and explained how energy can be reduced by using this MAC protocol. S-MAC is designed especially for Wireless Sensor Networks, simulation results are shown compared with normal wireless MAC.
Author: R. Sittalatchoumy Publisher: Infotech Publishers ISBN: 9784639332282 Category : Body, Mind & Spirit Languages : en Pages : 0
Book Description
CHAPTER 1 INTRODUCTION TO WIRELESS SENSOR NETWORKS This Chapter briefs the challenges and mechanisms of Wireless Sensor Networks. Various Routing and MAC Protocols related to WSN are analyzed in this Chapter. Some important applications of WSN are also revealed in this Chapter. 1.1 INTRODUCTION A Wireless Sensor Network (WSN) consists of spatially distributed autonomous sensors to monitor physical or environmental conditions, such as temperature, sound, pressure, etc. and to cooperatively pass their data through the network to the main location. On the other hand, modern networks are bidirectional, also enabling control of sensor activity. The development of wireless sensor networks have been used by military applications, industrial and consumer applications, such as industrial process monitoring and control, machine health monitoring, and so on.
Author: Alexander Mueller
Author: Alexander Mueller
Author: 
Author: Srinivas Aluru
Author: Ali M. Abu-El Humos
Author: Santhosh K V
Author: Feng Xia
Author: David Munoz
Author: Christoph Erik Tönsing
Author: Dinesh Moparthi
Author: R. Sittalatchoumy