Network-centric Mechanisms for Performance Improvement in Dense Wireless Networks PDF Download
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Author: Tarun Bansal
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The thesis discusses all the solutions in detail, along with the techniques to address the challenges involved in their practical implementation.
Author: Tarun Bansal
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The thesis discusses all the solutions in detail, along with the techniques to address the challenges involved in their practical implementation.
Author: Slawomir Stanczak
Publisher: Springer Science & Business Media
ISBN: 3540793860
Category : Technology & Engineering
Languages : en
Pages : 445
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Book Description
The purpose of this book is to provide tools for a better understanding of the fundamental tradeo?s and interdependencies in wireless networks, with the goal of designing resource allocation strategies that exploit these int- dependencies to achieve signi?cant performance gains. Two facts prompted us to write it: First, future wireless applications will require a fundamental understanding of the design principles and control mechanisms in wireless networks. Second, the complexity of the network problems simply precludes the use of engineering common sense alone to identify good solutions, and so mathematics becomes the key avenue to cope with central technical problems in the design of wireless networks. In this book, two ?elds of mathematics play a central role: Perron-Frobenius theory for non-negative matrices and optimization theory. This book is a revised and expanded version of the research monograph “Resource Allocation in Wireless Networks” that was published as Lecture Notes in Computer Sciences (LNCS 4000) in 2006. Although the general structure has remained unchanged to a large extent, the book contains - merous additional results and more detailed discussion. For instance, there is a more extensive treatment of general nonnegative matrices and interf- ence functions that are described by an axiomatic model. Additional material on max-min fairness, proportional fairness, utility-based power control with QoS (quality of service) support and stochastic power control has been added.
Author: David López-Pérez
Publisher: Cambridge University Press
ISBN: 1108484697
Category : Technology & Engineering
Languages : en
Pages : 425
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Book Description
A comprehensive text dedicated to ultra-dense networks, covering fundamental theory and practical applications.
Author: Steven Siying Hong
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Wireless has quickly become an irreplaceable medium for communication, but by their very nature, wireless transmissions are vulnerable to RF interference from various sources. This weakness is a growing problem for technologies that operate in unlicensed frequency bands, as these bands are becoming more crowded over time. The increasing density of radios, coupled with the growing number of different protocols, dictates that future wireless devices will require the ability to coexist and operate in a crowded and often unregulated electromagnetic environment. This dissertation presents a set of architectures and mechanisms for wireless coexistence. These mechanisms are intended as general primitives, enabling future wireless networks to be architected such that they are aware of who their RF neighbors are, what they are doing, and how to respond to them. We design and develop two systems, each demonstrating how changes at different levels across the network stack can provide significant gains. Degrees Of Freedom (DOF) is a robust and accurate technique to detect activity in any band of the relevant spectrum, while Picasso is an extensible radio design which allows the device to more easily exploit the fragmented bands which are available. This dissertation contributes to advancing the state of the art in wireless network design in multiple ways. First, the systems in this dissertation present novel algorithms that span signal processing, circuit design, and software systems. Not only do these algorithms enrich existing theory, they are designed with practical implementations in mind - helping to bridge the gap between theory and practice. Second, we present prototype implementations and testbed evaluations of our systems. Our results demonstrate that our systems deliver significantly improved performance in crowded interferencecentric environments, compared to the state-of-the-art. Finally, the work in this dissertation demonstrates that by having layers work cooperatively, rather than in isolation, common goals of high throughput and reliability in dense interference scenarios are much more practical to achieve. In particular, DOF demonstrates that more fine-grained information passed between the PHY and the MAC enables the MAC to make more informed and intelligent decisions regarding how to respond to the varying sources of interference. In the same vain, Picasso demonstrates that increased RF isolation can significantly lessen the burden on PHY filtering and MAC coordination - similarly allowing the three to share in the task of exploiting fragmented spectrum. We believe that the systems in this dissertation make a compelling and strong argument for cross-layer interdisciplinary wireless network design in order to solve the problems of wireless coexistence.
Author: Fadi Al-Turjman
Publisher: Springer
ISBN: 3030147185
Category : Technology & Engineering
Languages : en
Pages : 248
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Book Description
This book provides knowledge into the intelligence and security areas of smart-city paradigms. It focuses on connected computing devices, mechanical and digital machines, objects, and/or people that are provided with unique identifiers. The authors discuss the ability to transmit data over a wireless network without requiring human-to-human or human-to-computer interaction via secure/intelligent methods. The authors also provide a strong foundation for researchers to advance further in the assessment domain of these topics in the IoT era. The aim of this book is hence to focus on both the design and implementation aspects of the intelligence and security approaches in smart city applications that are enabled and supported by the IoT paradigms. Presents research related to cognitive computing and secured telecommunication paradigms; Discusses development of intelligent outdoor monitoring systems via wireless sensing technologies; With contributions from researchers, scientists, engineers and practitioners in telecommunication and smart cities.
Author: Shanzhi Chen
Publisher: Springer
ISBN: 3319612018
Category : Technology & Engineering
Languages : en
Pages : 83
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Book Description
This is the first book to introduce UUDN for 5G, including the concept, challenges, architecture and key technologies. The new network architecture based on “de-cellular” and “user-centric” is proposed with three kinds of decoupling: user plane and control plane decoupling from radio access, control and transmission decoupling from network, local service and network service decoupling. Key characteristics of UUDN are provided, including four aspects: Intelligent network knows user, Moving network follows user, Dynamic network serves user, and Secured network protects user. Four promising technology directions are discussed in detail, including dynamic APs grouping (DAPGing) method, intelligent networking, advanced interference management and user-centric security. The authors also include a UUDN solution, illustrated with numerology and evaluation results as a practical example. Finally, further research directions of UUDN are analyzed. This book gives an overall introduction of UUDN for people who are interested and just begin their study, as well as some suggestions on further research for experts involved in academic, industrial and standardization activities on relative fields.
Author: Kai Su
Publisher:
ISBN:
Category : Computer network protocols
Languages : en
Pages : 89
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Book Description
Effective and efficient support for wireless data transfer is an essential requirement for future Internet design, as the number of wireless network users and devices, and the amount of traffic flowing through these devices have been steadily growing. This dissertation tackles several problems, and proposes algorithmic and protocol design solutions to better provide such support. The first problem is regarding the inefficiency of multicast in wireless networks: a transmission is considered a unicast despite the fact that multiple nearby nodes can receive the transmitted packet. Random network coding (RNC) is considered a cure for this problem, but related wireless network radio resources, such as transmit power, need to be optimally allocated to use RNC to its full advantage. A dynamic radio resource allocation framework for RNC is proposed to maximize multicast throughput. Its efficacy is evaluated through both numerical and event driven simulations. Next, we present the design of MFTP, a clean-slate transport protocol aimed for supporting efficient wireless and mobile content delivery. Current transport protocol of the Internet, TCP, is known to fall short if the end-to-end path involves wireless links where link quality varies drastically, or if the client is mobile. Building on a mobility-centric future Internet architecture, MobilityFirst (MF), a set of transport protocol components are designed to collectively provide robust and efficient data transfer to wireless, or mobile end hosts. These include en-route storage for disconnection, in-network transport service, and hop-by-hop delivery of large chunks of data. A research prototype is built and deployed on ORBIT testbed to evaluate the design. Results from several wireless network use case evaluations, such as large file transfer, web content retrieval, and disconnection services, have shown that the proposed mechanisms achieve significant performance improvement over TCP. Finally, a scalable, network-assisted congestion control algorithm is proposed for the MobilityFirst future Internet architecture. In MobilityFirst, various intelligent functionalities, such as reliability and storage, are placed inside the network to assist with data delivery. Traditional end-to-end congestion control such as that carried out by TCP becomes unsuitable as it is unable to take advantage of such in-network functionalities. We design a congestion control policy that uses explicit congestion notifications from network routers and rate control at traffic sources. The hop-by-hop reliability provided in MF simplifies end-to-end reliable delivery of wireless/mobile data, but often requires routers to keep per-flow queues to carry out congestion control which could become impractical in the presence of a large number of flows. Our approach builds on a per-interface queueing scheme, and we show through simulation that it is able to substantially improve delay, fairness, and scalability with only
Author: Abraham George
Publisher: CRC Press
ISBN: 1003859992
Category : Technology & Engineering
Languages : en
Pages : 253
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Book Description
The connected world paradigm effectuated through the proliferation of mobile devices, Internet of Things (IoT), and the metaverse will offer novel services in the coming years that need anytime, anywhere, high-speed access. The success of this paradigm will highly depend on the ability of the devices to always obtain the optimal network connectivity for an application and on the seamless mobility of the devices. This book will discuss 6G concepts and architectures to support next-generation applications such as IoT, multiband devices, and high-speed mobile applications. IoT applications put forth significant challenges on the network in terms of spectrum utilization, latency, energy efficiency, large number of users, and supporting different application characteristics in terms of reliability, data rate, and latency.While the 5G network developmentwas motivated by the need for larger bandwidth and higher quality of service (QoS), 6G considerations are supporting many users with a wide application requirement, lowering network operating cost, and enhanced network flexibility. Network generations beyond 5G are expected to accommodate massive number of devices with the proliferation of connected devices concept in connected cars, industrial automation, medical devices, and consumer devices. This book will address the fundamental design consideration for 6G networks and beyond. There are many technical challenges that need to be explored in the next generation of networks, such as increased spectrum utilization, lower latency, higher data rates, accommodating more users, heterogeneous wireless connectivity, distributed algorithms, and device-centric connectivity due to diversified mobile environments and IoT application characteristics. Since 6G is a multidisciplinary topic, this book will primarily focus on aspects of device characteristics, wireless heterogeneity, traffic engineering, device-centric connectivity, and smartness of application.
Author: Raja Suresh
Publisher: SPIE-International Society for Optical Engineering
ISBN: 9780819458056
Category : Technology & Engineering
Languages : en
Pages : 334
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Book Description
Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
Author: Alessandro Aldini
Publisher: Springer
ISBN: 3319052187
Category : Computers
Languages : en
Pages : 361
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Book Description
This work represents a milestone for the "ULOOP User-centric Wireless Local Loop" project funded by the EU IST Seventh Framework Programme. ULOOP is focused on the robust, secure, and autonomic deployment of user-centric wireless networks. Contributions by ULOOP partners as well as invited tutorials by international experts in the field. The expected impact is to increase awareness to user-centric networking in terms, e.g., of business opportunities and quality of experience, and to present adequate technology to sustain the growth of user-friendly wireless architectures. Throughout the last 3 years, ULOOP has developed enabling technologies for user-centricity in wireless networks, with particular emphasis on social trust management, cooperation incentives, community building, mobility estimation, and resource management. This work will be of interest to researchers, policymakers, operators, vendors, and end-users interested in the current and future directions of user-centric access networks.
