Download or read book Quantization and Transmission in Wireless Multi hop Networks written by Behzad Mohammadi Dogahe and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Many applications like streaming audio/video, gaming, distributed or remote computing transmit data over communication networks. The quality-of-service (QoS) of these applications depends on parameters like rate, reliability, delay, power level, etc. Furthermore, these applications need to share network resources and co-exist with other applications which run on the same network. Since these communication networks are digital communication systems, the transmitter captures the real time data, quantizes and transmits to the receiver. At the receiver not only a reconstruction of the original signal is performed but also there may be a need to classify the signal into several classes. Therefore, reconstruction fidelity and classification are also QoS requirements that many applications may demand. We are interested in the problem of transmitting data in a layered multi-hop wireless network. The QoS in our system is a function of rates and end-to-end delay from transmitters to the receivers. We are considering wireless multi-hop networks, therefore the capacity of the communication links is a function of power of transmitters and the interference from other links transmitters. Furthermore, we are not only interested in reconstructing the received quantized data but also we would like to perform signal classification on the signals based only on the characteristics of the received quantized data. We break down this problem into two separate problems to be solved at different layers of communication network as follows Problem 1 which solves a network optimization problem where QoS depends on the rate, end-to-end delay, and power of transmitters. The solution to this problem essentially entails the rate control (congestion control) in the transport later, and the power control in the physical layer to achieve bounded average queuing delay for the end-to-end transmission of the data. Problem 2 which focuses on designing a quantizer that guarantees reproduction fidelity of the signals and good classification results based on the information preserved in the reconstructed signal. Linkage and Inter-connection between Problem 1 and Problem 2 Problem 1 determines the data rate of the sessions. The data rate can be translated into bits/vector rate which is fed into the quantizer that is designed by solving Problem 2. Therefore a communication system is devised that takes advantage of the solutions of Problem 1 and 2 in order to achieve the bigger objective of this dissertation. Let us now consider the solution to Problem 1. Allocating limited resources such as bandwidth and power in a multi-hop wireless network can be formulated as a Network Utility Maximization (NUM) problem. Researchers have been using NUM in order to develop new network resource allocation algorithms by augmenting the earlier NUM problems. In the NUM framework, sources in the network measure their performance by a utility function. We augment the basic NUM problem with a constraint based on the average queueing delay requirements of the sources. Furthermore, the capacity of the links in the case of wireless networks depend on the power of transmitters. This augmented NUM formulation turns out to be a non-convex problem. We convert this non-convex problem with high-SIR assumption and a change of variable to a convex problem. We furthermore propose methods to solve this problem in an iterative distributed manner. Simulation results demonstrate the efficacy of the distributed algorithm developed. To solve Problem 2, we adopt high-rate analysis to design a quantizer that is optimized in the task of reconstruction fidelity as well as classification at the decoder. We deploy symmetric Kullback-Leibler (KL) divergence measure between the conditional probabilities of class given the signal before and after quantization as our distortion measure. We derive the optimum point density of the quantizer for minimizing the symmetric KL divergence. We study tradeoff between classification accuracy and reproduction fidelity. We also derive the effects of a mismatched distortion measure and show that for reduced complexity the original distortion measure can be replaced by a weighted mean square error (WMSE) distortion measure. We examine the performance of these methods on synthetically generated data as well as real data set and observe that our methods are superior in the task of classification of signals at the decoder. The tradeoff is the lower performance in distortion. The linkage and interrelationship of Problem 1 and 2 is shown at the end. Problem 1 determines the data rate of the sessions. The data rate can be translated into bits/vector rate which is fed into the quantizer that is designed by solving Problem 2. Therefore a communication system is devised that takes advantage of the solutions of Problem 1 and 2 in order to achieve the bigger objective of this dissertation.

Download or read book Mobile Multimedia Processing written by Xiaoyi Jiang and published by Springer Science & Business Media. This book was released on 2010-04-14 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The portable device and mobile phone market has witnessed rapid growth in the last few years with the emergence of several revolutionary products such as mobile TV, converging iPhone and digital cameras that combine music, phone and video functionalities into one device. The proliferation of this market has further bene?ted from the competition in software and applications for smart phones such as Google’s Android operating system and Apple’s iPhone App- Store, stimulating tens of thousands of mobile applications that are made ava- able by individual and enterprise developers. Whereas the mobile device has become ubiquitous in people’s daily life not only as a cellular phone but also as a media player, a mobile computing device, and a personal assistant, it is p- ticularly important to address challenges timely in applying advanced pattern recognition, signal, information and multimedia processing techniques, and new emerging networking technologies to such mobile systems. The primary objective of this book is to foster interdisciplinary discussions and research in mobile multimedia processing techniques, applications and s- tems, as well as to provide stimulus to researchers on pushing the frontier of emerging new technologies and applications. One attempt on such discussions was the organization of the First Int- national Workshop of Mobile Multimedia Processing (WMMP 2008), held in Tampa, Florida, USA, on December 7, 2008. About 30 papers were submitted from10countriesacrosstheUSA,Asia andEurope.

Download or read book Global Effects of Local Transmission Strategies in Multihop Wireless Networks written by Saikat Ray and published by . This book was released on 2005 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contributions to Scalable Wireless Ad Hoc Networks Supporting Quality of Service written by Arasch Honarbacht and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobile ad hoc networks, also known as multihop or mesh networks, are gaining more and more attention these days. Originally designed for military applications, the idea of spontaneous communication using direct links to immediate neighbors has rapidly spread over to the civilian sector. This book focuses on the design of large-scale wireless multihop networks supporting quality-of-service. Based on an in-depth analysis of state-of-the-art architectures, the novel idea of cut-through/cell-switching is pointed out. Enhancements to the standard IEEE 802.11 DCF are presented as basic elements of diversified management protocols. An innovative approach to distributed dynamic channel assignment is introduced and benchmarked against one of the most powerful centralized algorithms known to date. Moreover, wireless sensor networks are identified as a new field of application for the classic Kalman filter.Finally, a new integrated R&D platform has been developed and is also part of the presentation. It consists of a simulation environment written in C++ and a software defined radio transceiver. The latter is based on an architecture employing the latest in digital signal processing: a general purpose DSP accompanied by FPGAs, dedicated digital up-/down converter ASICs, high-performance ADCs and DACs.

Download or read book Multihop Wireless Networks written by Kai Zeng and published by John Wiley & Sons. This book was released on 2011-07-13 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to opportunistic routing an emerging technology designed to improve the packet forwarding reliability, network capacity and energy efficiency of multihop wireless networks This book presents a comprehensive background to the technological challenges lying behind opportunistic routing. The authors cover many fundamental research issues for this new concept, including the basic principles, performance limit and performance improvement of opportunistic routing compared to traditional routing, energy efficiency and distributed opportunistic routing protocol design, geographic opportunistic routing, opportunistic broadcasting, and security issues associated with opportunistic routing, etc. Furthermore, the authors discuss technologies such as multi-rate, multi-channel, multi-radio wireless communications, energy detection, channel measurement, etc. The book brings together all the new results on this topic in a systematic, coherent and unified presentation and provides a much needed comprehensive introduction to this topic. Key Features: Addresses opportunistic routing, an emerging technology designed to improve the packet forwarding reliability, network capacity and energy efficiency of multihop wireless networks Discusses the technological challenges lying behind this new technology, and covers a wide range of practical implementation issues Explores many fundamental research issues for this new concept, including the basic principles of opportunistic routing, performance limits and performance improvement, and compares them to traditional routing (e.g. energy efficiency and distributed opportunistic routing protocol design, broadcasting, and security issues) Covers technologies such as multi-rate, multi-channel, multi-radio wireless communications, energy detection, channel measurement, etc. This book provides an invaluable reference for researchers working in the field of wireless networks and wireless communications, and Wireless professionals. Graduate students will also find this book of interest.

Download or read book Research on Key Techniques for Multimedia Communications in Wireless Multi Hop Networks written by Liang Zhou and published by . This book was released on 2009 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Sensor Systems for Extreme Environments written by Habib F. Rashvand and published by John Wiley & Sons. This book was released on 2017-08-14 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides unique coverage of wireless sensor system applications in space, underwater, underground, and extreme industrial environments in one volume This book covers the challenging aspects of wireless sensor systems and the problems and conditions encountered when applying them in outer space, under the water, below the ground, and in extreme industrial environments. It explores the unique aspects of designs and solutions that address those problems and challenges, and illuminates the connections, similarities, and differences between the challenges and solutions in those various environments. The creation of Wireless Sensor Systems for Extreme Environments is a response to the spread of wireless sensor technology into fields of health, safety, manufacturing, space, environmental, smart cities, advanced robotics, surveillance, and agriculture. It is the first of its kind to present, in a single reference, the unique aspects of wireless sensor system design, development, and deployment in such extreme environments—and to explore the similarities and possible synergies between them. The application of wireless sensor systems in these varied environments has been lagging dramatically behind their application in more conventional environments, making this an especially relevant book for investigators and practitioners in all of these areas. Wireless Sensor Systems for Extreme Environments is presented in five parts that cover: Wireless Sensor Systems for Extreme Environments—Generic Solutions Space WSS Solutions and Applications Underwater and Submerged WSS Solutions Underground and Confined Environments WSS Solutions Industrial and Other WSS Solutions This book is a welcome guide for researchers, post-graduate students, engineers and scientists who design and build operational and environmental control systems, emergency response systems, and situational awareness systems for unconventional environments.

Download or read book Emerging Technologies in Wireless LANs written by Benny Bing and published by Cambridge University Press. This book was released on 2008 with total page 847 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the key practical considerations for deploying wireless LANs and a solid understanding of the emerging technologies.

Download or read book Multi Hop Packetized Wireless Networks written by Isra Taulananda and published by . This book was released on 1997 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multi hop Wireless Networks written by Ilan Shomorony and published by . This book was released on 2014 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-hop communication paradigms are expected to play a central role in future wireless networks by enabling a higher spatial reuse of the spectrum. A major challenge in multi-hop multi-user (or multi-flow) wireless networks is that "interference management" and "relaying" are coupled with each other. In other words, wireless relay nodes must play a dual role: they serve as intermediate steps for multi-hop communication and as part of the mechanism that allows interference management schemes. Nonetheless, in the communications, networking and information theory literature, these two tasks have traditionally been addressed separately, and the fundamental principles of the "wireless networks of the future" are currently not well understood. In this monograph, we take a unified approach to relaying and interference management, and seek to develop tools to study the fundamentals of multi-hop multi-flow wireless networks.

Download or read book Fundamentals of Wireless Communication written by David Tse and published by Cambridge University Press. This book was released on 2005-05-26 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook takes a unified view of the fundamentals of wireless communication and explains cutting-edge concepts in a simple and intuitive way. An abundant supply of exercises make it ideal for graduate courses in electrical and computer engineering and it will also be of great interest to practising engineers.

Download or read book Mobile Computing and Wireless Networks Concepts Methodologies Tools and Applications written by Management Association, Information Resources and published by IGI Global. This book was released on 2015-09-30 with total page 2351 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live in a wireless society, one where convenience and accessibility determine the efficacy of the latest electronic gadgets and mobile devices. Making the most of these technologies—and ensuring their security against potential attackers—requires increased diligence in mobile technology research and development. Mobile Computing and Wireless Networks: Concepts, Methodologies, Tools, and Applications brings together a comprehensive range of voices and research in the area of mobile and wireless technologies, exploring the successes and failures, advantages and drawbacks, and benefits and limitations of the technology. With applications in a plethora of different research and topic areas, this multi-volume reference work benefits researchers, service providers, end-users, and information technology professionals. This four-volume reference work includes a diverse array of chapters and authors covering topics such as m-commerce, network ethics, mobile agent systems, mobile learning, communications infrastructure, and applications in fields such as business, healthcare, government, tourism, and more.

Download or read book Stochastic Modeling of Cooperative Wireless Multi hop Networks written by Syed Ali Hassan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-hop wireless transmission, where radios forward the message of other radios, is becoming popular both in cellular as well as sensor networks. : This research is concerned with the statistical modeling of multi-hop wireless networks that do cooperative transmission (CT). CT is a physical layer wireless.

Download or read book Wireless Sensor Networks written by Ananthram Swami and published by John Wiley & Sons. This book was released on 2007-10-24 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wireless sensor network (WSN) uses a number of autonomous devices to cooperatively monitor physical or environmental conditions via a wireless network. Since its military beginnings as a means of battlefield surveillance, practical use of this technology has extended to a range of civilian applications including environmental monitoring, natural disaster prediction and relief, health monitoring and fire detection. Technological advancements, coupled with lowering costs, suggest that wireless sensor networks will have a significant impact on 21st century life. The design of wireless sensor networks requires consideration for several disciplines such as distributed signal processing, communications and cross-layer design. Wireless Sensor Networks: Signal Processing and Communications focuses on the theoretical aspects of wireless sensor networks and offers readers signal processing and communication perspectives on the design of large-scale networks. It explains state-of-the-art design theories and techniques to readers and places emphasis on the fundamental properties of large-scale sensor networks. Wireless Sensor Networks: Signal Processing and Communications : Approaches WSNs from a new angle – distributed signal processing, communication algorithms and novel cross-layer design paradigms. Applies ideas and illustrations from classical theory to an emerging field of WSN applications. Presents important analytical tools for use in the design of application-specific WSNs. Wireless Sensor Networks will be of use to signal processing and communications researchers and practitioners in applying classical theory to network design. It identifies research directions for senior undergraduate and graduate students and offers a rich bibliography for further reading and investigation.

Download or read book Distributed Forwarding in Multiuser Multihop Wireless Networks written by Jörg Wagner and published by . This book was released on 2012-08-08 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cooperation in Wireless Networks Principles and Applications written by Frank H. P. Fitzek and published by Springer Science & Business Media. This book was released on 2006-07-25 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooperation in Wireless Networks: Principles and Applications covers the underlying principles of cooperative techniques as well as several applications demonstrating the use of such techniques in practical systems. The book is written in a collaborative manner by several authors from Asia, America, and Europe. This book puts into one volume a comprehensive and technically rich appraisal of the wireless communications scene from a cooperation point of view.

Download or read book Advances in Computer Science Environment Ecoinformatics and Education Part III written by Sally Lin and published by Springer Science & Business Media. This book was released on 2011-08-09 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 5-volume set (CCIS 214-CCIS 218) constitutes the refereed proceedings of the International Conference on Computer Science, Environment, Ecoinformatics, and Education, CSEE 2011, held in Wuhan, China, in July 2011. The 525 revised full papers presented in the five volumes were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on information security, intelligent information, neural networks, digital library, algorithms, automation, artificial intelligence, bioinformatics, computer networks, computational system, computer vision, computer modelling and simulation, control, databases, data mining, e-learning, e-commerce, e-business, image processing, information systems, knowledge management and knowledge discovering, mulitimedia and its apllication, management and information system, moblie computing, natural computing and computational intelligence, open and innovative education, pattern recognition, parallel and computing, robotics, wireless network, web application, other topics connecting with computer, environment and ecoinformatics, modeling and simulation, environment restoration, environment and energy, information and its influence on environment, computer and ecoinformatics, biotechnology and biofuel, as well as biosensors and bioreactor.