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| Author | : 薛學儒 |
| Publisher | : |
| Total Pages | : |
| Release | : 2013 |
| Genre | : |
| ISBN | : |
| Author | : Stefan Valentin |
| Publisher | : Sudwestdeutscher Verlag Fur Hochschulschriften AG |
| Total Pages | : 224 |
| Release | : 2010-10 |
| Genre | : |
| ISBN | : 9783838118581 |
Cooperative relaying is a promising approach to improve data rate and coverage in wireless networks. Although the benefits of cooperation have been consistently shown in theory, the performance of realistic cooperative networks is still not clear. Bridging this gap between theory and practice is the objective of this thesis. This is done in three steps. First, practical selection relaying protocols are analyzed under realistic assumptions. Second, efficient protocol extensions are described and, third, a prototype for cooperative Wireless Local Area Networks (WLANs) is demonstrated. Based on theoretical findings and extensive field measurements, this thesis provides insight into the performance regions of realistic cooperative networks and into implementing cooperative devices. Furthermore, the basic elements of cooperative systems are introduced and a concise taxonomy of common designs is given. This text is, thus, helpful for researchers and engineers who implement cooperative systems, plan to support their networks by relaying, or look for an introduction in the field.
| Author | : Mohammad S. Obaidat |
| Publisher | : John Wiley & Sons |
| Total Pages | : 354 |
| Release | : 2011-08-15 |
| Genre | : Technology & Engineering |
| ISBN | : 0470749156 |
This book focuses on the latest trends and research results in Cooperative Networking This book discusses the issues involved in cooperative networking, namely, bottleneck resource management, resource utilization, servers and content, security, and so on. In addition, the authors address instances of cooperation in nature which actively encourage the development of cooperation in telecommunication networks. Following an introduction to the fundamentals and issues surrounding cooperative networking, the book addresses models of cooperation, inspirations of successful cooperation from nature and society, cooperation in networking (for e.g. Peer-to-Peer, wireless ad-hoc and sensor, client-server, and autonomous vehicular networks), cooperation and ambient networking, cooperative caching, cooperative networking for streaming media content, optimal node-task allocation, heterogeneity issues in cooperative networking, cooperative search in networks, and security and privacy issues with cooperative networking. It contains contributions from high profile researchers and is edited by leading experts in this field. Key Features: Focuses on higher layer networking Addresses the latest trends and research results Covers fundamental concepts, models, advanced topics and performance issues in cooperative networking Contains contributions from leading experts in the field Provides an insight into the future direction of cooperative networking Includes an accompanying website containing PowerPoint slides and a glossary of terms (www.wiley.com/go/obaidat_cooperative) This book is an ideal reference for researchers and practitioners working in the field. It will also serve as an excellent textbook for graduate and senior undergraduate courses in computer science, computer engineering, electrical engineering, software engineering, and information engineering and science.
| Author | : Gerhard Kramer |
| Publisher | : Now Publishers Inc |
| Total Pages | : 170 |
| Release | : 2007 |
| Genre | : Computers |
| ISBN | : 1601980264 |
Cooperative Communications reviews progress in cooperative communication networks. It assembles a representative sample of recent results to serve as a roadmap for the area. The emphasis is on wireless networks, but many of the results apply to cooperation in wireline networks and mixed wireless/wireline networks. Cooperative Communications is intended as a tutorial for the reader who is familiar with information theory concepts but has not actively followed the field. For the active researcher, it serves as an invaluable digest of significant results. It is designed to encourage readers to find new ways to apply the fundamental ideas of network cooperation. It is also intended to make the area sufficiently accessible to practicing network designers.
| Author | : Habib M. Ammari |
| Publisher | : Springer Nature |
| Total Pages | : 794 |
| Release | : 2019-09-18 |
| Genre | : Technology & Engineering |
| ISBN | : 3319923846 |
This book presents a broad range of deep-learning applications related to vision, natural language processing, gene expression, arbitrary object recognition, driverless cars, semantic image segmentation, deep visual residual abstraction, brain–computer interfaces, big data processing, hierarchical deep learning networks as game-playing artefacts using regret matching, and building GPU-accelerated deep learning frameworks. Deep learning, an advanced level of machine learning technique that combines class of learning algorithms with the use of many layers of nonlinear units, has gained considerable attention in recent times. Unlike other books on the market, this volume addresses the challenges of deep learning implementation, computation time, and the complexity of reasoning and modeling different type of data. As such, it is a valuable and comprehensive resource for engineers, researchers, graduate students and Ph.D. scholars.
| Author | : Amir Ehsan Khandani |
| Publisher | : |
| Total Pages | : 89 |
| Release | : 2004 |
| Genre | : |
| ISBN | : |
In this thesis, we study the problem of energy efficiency and reliability in wireless ad-hoc networks. First, we introduce the idea of wireless cooperation advantage. We formulate the problem of finding the minimum energy cooperative route for a wireless network under idealized channel and receiver models. Fundamental to the understanding of the routing problem is the understanding of the optimal power allocation for a single message transmission between two sets of nodes. We present the solution to this problem, and use that as the basis for solving the minimum energy cooperative routing problem. We analytically obtain the energy savings in regular line and regular grid networks. We propose heuristics for selecting the cooperative route in random networks and give simulation results confirming significant energy savings achieved through cooperation. In the second part, we study the problem of route reliability in a multi-hop network. We look at the reliability issue at the link level and extend those result to a wireless network setting. In the network setting, we first define and analyze the reliability for a fixed route and then propose algorithms for finding the optimal route between a source-destination pair of nodes. The relationship between the route reliability and consumed power is studied. The idea of route diversity is introduced as a way to improve the reliability by taking advantage of the broadcast property, the independence of fading state between different pairs of nodes, and space diversity created by multiple intermediate relay nodes along the route. We give analytical results on improvements due to route diversity in some simple network topologies.
| Author | : Uysal, Murat |
| Publisher | : IGI Global |
| Total Pages | : 632 |
| Release | : 2009-07-31 |
| Genre | : Computers |
| ISBN | : 1605666661 |
Offers practitioners, researchers, and academicians with fundamental principles of cooperative communication. This book provides readers diverse findings and exposes underlying issues in the analysis, design, and optimization of wireless systems.
| Author | : Hossam Mahmoud Ahmad Fahmy |
| Publisher | : Springer Nature |
| Total Pages | : 819 |
| Release | : 2023-02-13 |
| Genre | : Technology & Engineering |
| ISBN | : 3031207092 |
The third edition of this hands-on textbook pursues the focus on the principles of wireless sensor networks (WSNs), their applications, their protocols and standards, and their analysis and test tools; a meticulous care has been accorded to the definitions and terminology. To make WSNs felt and seen, the adopted technologies as well as their manufacturers are presented in detail. In introductory computer networking books, chapters sequencing follows the bottom up or top down architecture of the seven layers protocol. This book is some more steps after, both horizontally and vertically, the view and understanding are getting clearer, chapters ordering is based on topics significance to the elaboration of wireless sensor networks (WSNs) concepts and issues. This book is intended for a wide audience, it is meant to be help and motivate, for both the senior undergraduates, postgraduates, researchers, and practitioners; concepts and WSNs related applications are laid out, research and practical issues are backed by appropriate literature, and new trends are put under focus. For senior undergraduate students, it familiarizes with conceptual foundations, applications and practical projects implementations. For graduate students and researchers, energy-efficient routing protocols, transport layer protocols and cross-layering protocols approach are presented. Testbeds and simulators provide a must follow emphasis on the analysis methods and tools for WSNs. For practitioners, besides applications and deployment, the manufacturers and components of WSNs at several platforms and testbeds are fully explored.
| Author | : Stefan Berger |
| Publisher | : Logos Verlag Berlin GmbH |
| Total Pages | : 337 |
| Release | : 2010 |
| Genre | : |
| ISBN | : 383252536X |
In this thesis, several important aspects of cooperative wireless multiuser networks are investigated. The focus lies on coherent two-hop relaying networks where several amplify-and-forward (AF) relays assist the communication between multiple source-destination pairs. First, the impact of local oscillator (LO) imperfections and I/Q imbalance at the relays on two-hop relaying is investigated. A special focus lies on the comparison between frequency division duplexing (FDD) and time division duplexing (TDD) relays. Based on the observation that the direction in which a channel between two wireless nodes is measured has an impact on the estimate, phase synchronization requirements for coherent relaying networks are then found. Several channel estimation protocols that differ in the direction in which the single-hop channels are measured are furthermore identi'ed and their performance is compared. Next, a very simple phase synchronization scheme is presented that provides a set of relays with a common LO phase. Two coherent beamforming schemes, namely multiuser zero-forcing (MUZF) and multiuser minimum mean squared error (MMSE) relaying, are then investigated. Finally, a real-world demonstrator for distributed wireless communication networks (called RACooN Lab) is presented. It was used to implement coherent cooperative communication schemes on a practical two-hop relaying network.
| Author | : Wei Song |
| Publisher | : Springer |
| Total Pages | : 135 |
| Release | : 2016-11-03 |
| Genre | : Technology & Engineering |
| ISBN | : 3319477269 |
This book focuses on the design and analysis of protocols for cooperative wireless networks, especially at the medium access control (MAC) layer and for crosslayer design between the MAC layer and the physical layer. It highlights two main points that are often neglected in other books: energy-efficiency and spatial random distribution of wireless devices. Effective methods in stochastic geometry for the design and analysis of wireless networks are also explored. After providing a comprehensive review of existing studies in the literature, the authors point out the challenges that are worth further investigation. Then, they introduce several novel solutions for cooperative wireless network protocols that reduce energy consumption and address spatial random distribution of wireless nodes. For each solution, the book offers a clear system model and problem formulation, details of the proposed cooperative schemes, comprehensive performance analysis, and extensive numerical and simulation results that validate the analysis and examine the performance under various conditions. The last section of this book reveals several potential directions for the research on cooperative wireless networks that deserve future exploration. Researchers, professionals, engineers, and consultants in wireless communication and mobile networks will find this book valuable. It is also helpful for technical staff in mobile network operations, wireless equipment manufacturers, wireless communication standardization bodies, and governmental regulation agencies.
