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Opportunistic Scheduling And Cooperative Relaying In Wireless Networks
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Book Synopsis Opportunistic Scheduling and Cooperative Relaying in Wireless Networks by : Yufeng Wang
Download or read book Opportunistic Scheduling and Cooperative Relaying in Wireless Networks written by Yufeng Wang and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the proposed scheduling scheme, we prove two key inequalities that capture the various tradeoffs inherent in the broad class of opportunistic relaying protocols, illustrating that no scheduling and routing algorithm can simultaneously yield lower delay and higher throughput. We then develop an adaptive rate transmission scheme with opportunistic scheduling, with the constraints of practical assumptions on channel state information (CSI) and limited feedback, which achieves an optimal system throughput scaling order. Along this work with the consideration of finite-buffer model, we propose a Buffer-Aware Adaptive (BAA) scheduler which considers both channel state and buffer conditions to make scheduling decisions, to reduce average packet delay, while maintaining the queue stability condition of the networks. The proposed algorithm is an improvement over existing algorithms with adaptability and bounded potential throughput reduction. In the third part, we extend the methods and analyses developed for wireless ad hoc networks to a practical Aeronautical Communication Networks (ACN) and present the system performance of such networks. We use our previously proposed scheduling schemes and analytical methods from the second part to investigate the issues about connectivity, throughput and delay in ACN, for both single-hop and two-hop communication models. We conclude that the two-hop model achieves greater throughput than the single-hop model for ACN. Both throughput and delay performances are characterized.
Book Synopsis Opportunistic Scheduling, Cooperative Relaying and Multicast in Wireless Networks by : Chandrashekhar Thejaswi Paataguppe Suryanarayan Bhat
Download or read book Opportunistic Scheduling, Cooperative Relaying and Multicast in Wireless Networks written by Chandrashekhar Thejaswi Paataguppe Suryanarayan Bhat and published by . This book was released on 2011 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation builds a clear understanding of the role of information in wireless networks, and devises adaptive strategies to optimize the overall performance. The meaning of information ranges from channel/network states to the structure of the signal itself. Under the common thread of characterizing the role of information, this dissertation investigates opportunistic scheduling, relaying and multicast in wireless networks. To assess the role of channel state information, the problem of opportunistic distributed opportunistic scheduling (DOS) with incomplete information is considered for ad-hoc networks in which many links contend for the same channel using random access. The objective is to maximize the system throughput. In practice, link state information is noisy, and may result in throughput degradation. Therefore, refining the state information by additional probing can improve the throughput, but at the cost of further probing. Capitalizing on optimal stopping theory, the optimal scheduling policy is shown to be threshold-based and is characterized by either one or two thresholds, depending on network settings. To understand the benefits of side information in cooperative relaying scenarios, a basic model is explored for two-hop transmissions of two information flows which interfere with each other. While the first hop is a classical interference channel, the second hop can be treated as an interference channel with transmitter side information. Various cooperative relaying strategies are developed to enhance the achievable rate. In another context, a simple sensor network is considered, where a sensor node acts as a relay, and aids fusion center in detecting an event. Two relaying schemes are considered: analog relaying and digital relaying. Sufficient conditions are provided for the optimality of analog relaying over digital relaying in this network. To illustrate the role of information about the signal structure in joint source-channel coding, multicast of compressible signals over lossy channels is studied. The focus is on the network outage from the perspective of signal distortion across all receivers. Based on extreme value theory, the network outage is characterized in terms of key parameters. A new method using subblock network coding is devised, which prioritizes resource allocation based on the signal information structure.
Book Synopsis Cooperative Relaying and Adaptive Scheduling for Low Mobility Wireless Access Networks by : Ingmar Hammerström
Download or read book Cooperative Relaying and Adaptive Scheduling for Low Mobility Wireless Access Networks written by Ingmar Hammerström and published by . This book was released on 2006 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Wireless Networks by : Savo Glisic
Download or read book Advanced Wireless Networks written by Savo Glisic and published by John Wiley & Sons. This book was released on 2009-04-27 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: With 40% new material the new edition of Advanced Wireless Networks provides a comprehensive representation of the key issues in 4G wireless networks. Focussing on cognitive, cooperative and opportunistic paradigms to provide further increase in network efficiency, the book explores and addresses issues in wireless internet, mobile cellular and WLAN, as well as sensor, ad hoc, bio-inspired, active and cognitive networks. It examines the problem of cross-layer optimisation and network information theory as well as adaptability and reconfigurability in wireless networks. This book is an integral description of future wireless networks and the interconnection between their elements. The information is presented in a logical order within each chapter making it ideal for all levels of reader including researchers involved in modelling and analysis of future networks as well as engineers working in the area. Each chapter starts with introductory material and gradually includes more sophisticated models and mathematical tools concluding with a comprehensive list of references. Fully updated throughout with five new chapters on Opportunistic Communications; Relaying and Mesh Networks; Topology Control; Network Optimization; and Cognitive Radio Resource Management Unifies the latest research on cognitive, cooperative and opportunistic paradigms in wireless communications Provides efficient analytical tools for network analysis Discusses security issues, an essential element of working with wireless networks Supports advanced university and training courses in the field Companion website containing extra appendix on Queuing theory
Book Synopsis Cooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applications by : Uysal, Murat
Download or read book Cooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applications written by Uysal, Murat and published by IGI Global. This book was released on 2009-07-31 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Opportunistic Scheduling with Limited Feedback in Wireless Communication Networks by : Mohammed E. Eltayeb
Download or read book Opportunistic Scheduling with Limited Feedback in Wireless Communication Networks written by Mohammed E. Eltayeb and published by . This book was released on 2014 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: In multiuser networks, the base stations (BSs) rely on the channel state information (CSI) of the users to perform user scheduling and downlink transmissions. While the downlink channels can be easily estimated at all user terminals via a single broadcast, several key challenges are faced during uplink (feedback) transmissions. Firstly, the amount of air-time consumed during feedback transmission grows linearly with the number of users. This domination of the network resources by feedback traffic leads to increased scheduling delay and outdated CSI at the BS. Secondly , the fed back CSI is generally corrupted by the fading and noisy feedback channel. This could lead to transmission outages if the network scheduler bases its scheduling decisions on inaccurate CSI. These challenges make CSI acquisition arduous, if not impossible, in practice. In this research, we develop efficient scheduling algorithms that account for the feedback channel impairments of multiuser wireless networks. The proposed algorithms encompass both single and dual-hop wireless networks, and; permit the BS to obtain CSI with acceptable recovery guarantees under substantially reduced feedback overhead. More specifically, we consider feedback reduction for i) multiuser networks with single antenna base stations, ii) multiuser user networks with multi-antenna base stations, and iii) cooperative multiuser networks. Analytical and simulations results show that the proposed algorithms, together with the proposed feedback noise mitigation techniques, drastically reduce the feedback overhead, and achieve a rate close to that obtained by scheduling algorithms that require noiseless dedicated feedback from all users.
Book Synopsis Cooperative Wireless Communications by : Yan Zhang
Download or read book Cooperative Wireless Communications written by Yan Zhang and published by CRC Press. This book was released on 2009-03-10 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cooperative devices and mechanisms are increasingly important to enhance the performance of wireless communications and networks, with their ability to decrease power consumption and packet loss rate and increase system capacity, computation, and network resilience. Considering the wide range of applications, strategies, and benefits associated wit
Book Synopsis Cooperative Relaying in Wireless Networks by : Sedat Görmüş
Download or read book Cooperative Relaying in Wireless Networks written by Sedat Görmüş and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cooperative Relaying in Wireless Networks by :
Download or read book Cooperative Relaying in Wireless Networks written by and published by . This book was released on 2008 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wireless Networking for Moving Objects by : Ivan Ganchev
Download or read book Wireless Networking for Moving Objects written by Ivan Ganchev and published by Springer. This book was released on 2014-08-25 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless networks of moving objects have drawn significant attention recently. These types of networks consist of a number of autonomous or semi-autonomous wireless nodes/objects moving with diverse patterns and speeds while communicating via several radio interfaces simultaneously. To overcome current shortcomings, a number of research challenges have to be addressed in this area, ranging from initial conceptualization and modelling, to protocols and architectures engineering, and development of suitable tools, applications and services, and to the elaboration of realistic use-case scenarios by taking into account corresponding societal and economic aspects. By applying a systematic approach the objective of this book is to assess the state of the art and consolidate the main research results achieved in this area. It was prepared as the Final Publication of the COST Action IC0906 “Wireless Networking for Moving Objects (WiNeMO)”. The book contains 15 chapters and is a show-case of the main outcomes of the action in line with its scientific goals. The book will serve as a valuable reference for undergraduate students, post-graduate students, educators, faculty members, researchers, engineers, and research strategists working in this field.
Book Synopsis Cooperative Relaying and Its Application by : Stefan Valentin
Download or read book Cooperative Relaying and Its Application written by Stefan Valentin and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2010-10 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Cooperative Relaying Protocols for Randomly-deployed Wireless Networks by : Oğuz Doğan
Download or read book Cooperative Relaying Protocols for Randomly-deployed Wireless Networks written by Oğuz Doğan and published by . This book was released on 2009 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spectrum Sharing in Wireless Networks by : John D. Matyjas
Download or read book Spectrum Sharing in Wireless Networks written by John D. Matyjas and published by CRC Press. This book was released on 2016-11-17 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectrum Sharing in Wireless Networks: Fairness, Efficiency, and Security provides a broad overview of wireless network spectrum sharing in seven distinct sections: The first section examines the big picture and basic principles, explaining the concepts of spectrum sharing, hardware/software function requirements for efficient sharing, and future trends of sharing strategies. The second section contains more than 10 chapters that discuss differing approaches to efficient spectrum sharing. The authors introduce a new coexistence and sharing scheme for multi-hop networks, describe the space-time sharing concept, introduce LTE-U, and examine sharing in broadcast and unicast environments. They then talk about different cooperation strategies to achieve mutual benefits for primary users (PU) and secondary users (SU), discuss protocols in a spectrum sharing context, and provide different game theory models between PUs and SUs. The third section explains how to model the interactions of PUs and SUs, using an efficient calculation method to determine spectrum availability. Additionally, this section explains how to use scheduling models to achieve efficient SU traffic delivery. The subject of the fourth section is MIMO-oriented design. It focuses on how directional antennas and MIMO antennas greatly enhance wireless network performance. The authors include a few chapters on capacity/rate calculations as well as beamforming issues under MIMO antennas. Power control is covered in the fifth section which also describes the interference-aware power allocation schemes among cognitive radio users and the power control schemes in cognitive radios. The sixth section provides a comprehensive look at security issues, including different types of spectrum sharing attacks and threats as well as corresponding countermeasure schemes. The seventh and final section covers issues pertaining to military applications and examines how the military task protects its data flows when sharing the spectrum with civilian applications.
Book Synopsis Opportunistic Scheduling and Resource Allocation Among Heterogeneous Users in Wireless Networks by : Shailesh Patil
Download or read book Opportunistic Scheduling and Resource Allocation Among Heterogeneous Users in Wireless Networks written by Shailesh Patil and published by . This book was released on 2006 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally, we propose methods to reduce the feedback overhead for users' channel state information needed for opportunistic scheduling at a base station. We first propose a contention based scheme known as 'static splitting' for a best effort traffic only scenario. Next we consider reducing feedback overhead in a system supporting a mixture of best effort and real-time traffic. We argue that one needs to combine contention based schemes with polling subsets of users to reduce the amount of feedback needed to exploit opportunism, and yet meet real-time users' QoS guarantees. Based on this argument we propose a joint polling and opportunistic scheduling (JPOS) scheme.
Book Synopsis Physical-Layer Security for Cooperative Relay Networks by : Yulong Zou
Download or read book Physical-Layer Security for Cooperative Relay Networks written by Yulong Zou and published by Springer. This book was released on 2016-04-20 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents physical-layer security as a promising paradigm for achieving the information-theoretic secrecy required for wireless networks. It explains how wireless networks are extremely vulnerable to eavesdropping attacks and discusses a range of security techniques including information-theoretic security, artificial noise aided security, security-oriented beamforming, and diversity assisted security approaches. It also provides an overview of the cooperative relaying methods for wireless networks such as orthogonal relaying, non-orthogonal relaying, and relay selection.Chapters explore the relay-selection designs for improving wireless secrecy against eavesdropping in time-varying fading environments and a joint relay and jammer selection for wireless physical-layer security, where a relay is used to assist the transmission from the source to destination and a friendly jammer is employed to transmit an artificial noise for confusing the eavesdropper. Additionally, the security-reliability tradeoff (SRT) is mathematically characterized for wireless communications and two main relay-selection schemes, the single-relay and multi-relay selection, are devised for the wireless SRT improvement. In the single-relay selection, only the single best relay is chosen for assisting the wireless transmission, while the multi-relay selection invokes multiple relays for simultaneously forwarding the source transmission to the destination.Physical-Layer Security for Cooperative Relay Networks is designed for researchers and professionals working with networking or wireless security. Advanced-level students interested in networks, wireless, or privacy will also find this book a useful resource.
Author :Rudesindo Núñez-Queija Publisher :Springer Science & Business Media ISBN 13 :3642104053 Total Pages :289 pages Book Rating :4.6/5 (421 download)
Book Synopsis Network Control and Optimization by : Rudesindo Núñez-Queija
Download or read book Network Control and Optimization written by Rudesindo Núñez-Queija and published by Springer Science & Business Media. This book was released on 2009-11-06 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third Euro-NF International Conference, NET-COOP 2009 held in Eindhoven, The Netherlands, in November 2009. The 18 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on performance analysis methods, wireless, queueing analysis, battery control, distributed control, and cooperation and competition.
Book Synopsis Opportunistic Scheduling in Wireless Data Networks by : Wen Huang
Download or read book Opportunistic Scheduling in Wireless Data Networks written by Wen Huang and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
