Download or read book Advanced Opportunistic Multiuser Scheduling for Wireless Communications written by PhuongBang Nguyen and published by . This book was released on 2015 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation addresses key aspects of opportunistic multiuser scheduling, one of the main components of next generation wireless networks responsible for achieving maximum spectrum efficiency and superior user experience. The main topics include the exploitation of multiuser diversity and spatial frequency reuse while maintaining user fairness, the design and analysis of fair scheduling policies that can provide optimal performance, the utilization of historical channel data in scheduling, and the Quality-of-Service (QoS) guarantee. First, we consider the scheduling problem in cellular networks which support Device-to-Device Communications (D2D). In a D2D network, additional communication modes including orthogonal and non-orthogonal D2D communications make it very challenging to perform fair resource allocation while maximizing the system performance. Based on the Cumulative Distribution Function (CDF) scheduling approach, we propose two orthogonal scheduling policies that guarantee access fairness among all users while taking advantage of multi-user diversity and local D2D communications. For even higher spectral efficiency, spatial frequency reuse is proposed via our novel Group Fairness Scheduling (GFS) policy, that exploits both spatial frequency reuse and multiuser diversity in order to deliver marked improvements to system performance with perfect fairness among the users. Next, we examine the optimality of opportunistic scheduling under temporal fairness. In general, obtaining the optimal scheduling gain under user fairness or other QoS criteria for a heterogeneous environment is very difficult. Two main methods are proposed to obtain the optimal scheduling solutions under temporal fairness. In the first method, we derive linear program-based scheduling (LPS) algorithms using a window of past Channel State Information (CSI) to compute the scheduling decisions that can approach the optimal policy as the window size gets large. In the second method, we cast the scheduling problem as one of statistical classification and propose a novel supervised classification-based scheduling (SCS) framework for obtaining optimal scheduling decision boundaries. Finally, we address one of the key QoS aspects of opportunistic multiuser scheduling, the user service delay time. Keeping the service delay time under control while maximizing the scheduling gain subject to some fairness criterion is a very hard problem in general. In order to reduce the service delay, we introduce the concept of delay profile shaping. Based on this concept and large system approximations, we develop a novel delay reduction scheme, the Opportunistic Bernoulli Mixing (OBM) policy, which can support different user channel conditions and resource allocation requirements with an excellent performance/delay tradeoff.

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.

Download or read book On Opportunistic Scheduling and Adaptive Modulation in Wireless Communications written by Yahya S. Al-Harthi and published by . This book was released on 2005 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Restless Multi armed Bandit in Opportunistic Scheduling written by Kehao Wang and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides foundations for the understanding and design of computation-efficient algorithms and protocols for those interactions with environment, i.e., wireless communication systems. The book provides a systematic treatment of the theoretical foundation and algorithmic tools necessarily in the design of computation-efficient algorithms and protocols in stochastic scheduling. The problems addressed in the book are of both fundamental and practical importance. Target readers of the book are researchers and advanced-level engineering students interested in acquiring in-depth knowledge on the topic and on stochastic scheduling and their applications, both from theoretical and engineering perspective. Introduces Restless Multi-Armed Bandit (RMAB) and presents its relevant tools involved in machine learning and how to adapt them for application; Elaborates on research bringing the conventional decision theory and stochastic optimal technology into wireless communication applications involving machine learning; Delivers a comprehensive treatment on problems ranging from theoretical modeling and analysis, to practical algorithm design and optimization.

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

Download or read book Radio Communications written by Alessandro Bazzi and published by IntechOpen. This book was released on 2010-04-01 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decades the restless evolution of information and communication technologies (ICT) brought to a deep transformation of our habits. The growth of the Internet and the advances in hardware and software implementations modified our way to communicate and to share information. In this book, an overview of the major issues faced today by researchers in the field of radio communications is given through 35 high quality chapters written by specialists working in universities and research centers all over the world. Various aspects will be deeply discussed: channel modeling, beamforming, multiple antennas, cooperative networks, opportunistic scheduling, advanced admission control, handover management, systems performance assessment, routing issues in mobility conditions, localization, web security. Advanced techniques for the radio resource management will be discussed both in single and multiple radio technologies; either in infrastructure, mesh or ad hoc networks.

Download or read book Distributed Opportunistic Scheduling Algorithms for Wireless Communications written by Toan To and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mobile and Wireless Communications for IMT Advanced and Beyond written by Afif Osseiran and published by John Wiley & Sons. This book was released on 2011-08-08 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely addition to the understanding of IMT-Advanced, this book places particular emphasis on the new areas which IMT-Advanced technologies rely on compared with their predecessors. These latest areas include Radio Resource Management, Carrier Aggregation, improved MIMO support and Relaying. Each technique is thoroughly described and illustrated before being surveyed in context of the LTE-Advanced standards. The book also presents state-of-the-art information on the different aspects of the work of standardization bodies (such as 3GPP and IEEE), making global links between them. Explores the latest research innovations to assess the future of the LTE standard Covers the latest research techniques for beyond IMT-Advanced such as Coordinated multi-point systems (CoMP), Network Coding, Device-to-Device and Spectrum Sharing Contains key information for researchers from academia and industry, engineers, regulators and decision makers working on LTE-Advanced and beyond

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: This dissertation, "Opportunistic Scheduling in Wireless Data Networks" by Wen, Huang, 黄文, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b4589523 Subjects: Wireless communication systems Computer scheduling

Download or read book Advanced Video Communications over Wireless Networks written by Ce Zhu and published by CRC Press. This book was released on 2017-12-19 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless video communications encompass a broad range of issues and opportunities that serve as the catalyst for technical innovations. To disseminate the most recent advances in this challenging yet exciting field, Advanced Video Communications over Wireless Networks provides an in-depth look at the fundamentals, recent technical achievements, challenges, and emerging trends in mobile and wireless video communications. The editors have carefully selected a panel of researchers with expertise in diverse aspects of wireless video communication to cover a wide spectrum of topics, including the underlying theoretical fundamentals associated with wireless video communications, the transmission schemes tailored to mobile and wireless networks, quality metrics, the architectures of practical systems, as well as some novel directions. They address future directions, including Quality-of-Experience in wireless video communications, video communications over future networks, and 3D video communications. The book presents a collection of tutorials, surveys, and original contributions, providing an up-to-date, accessible reference for further development of research and applications in mobile and wireless video communication systems. The range of coverage and depth of expertise make this book the go-to resource for facing current and future challenges in this field.

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 Power Scheduling for Multi hop Wireless Networks written by Yuan Yu and published by . This book was released on 2009 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-hop wireless networks remain an important research frontier of wireless communications. Multi-hop wireless networks are rapidly deployable to extend the coverage of the Internet, which can be an economical alternative to building new base stations. Multi-hop wireless networks are particularly useful for first responders for disaster relief, and military operations in battlefields. In this thesis, we study power scheduling issues for multi-hop wireless networks. Power scheduling, also known as medium access control consisting of link scheduling, power control and source beamforming, fundamentally governs the capacity of multi-hop wireless networks. In the first part of this thesis, the achievable network throughput of large-scale multi-hop wireless networks is evaluated under a power scheduling scheme called opportunistic synchronous array method (O-SAM). Under O-SAM, a large network is partitioned into many small subnets, and within each subnet, the link with best channel gain is scheduled for transmission. We examine the impact of traffic load, network topology and multiple antennas on the achievable network throughput. Compared with slotted ALOHA, the throughput of O-SAM is significantly higher. In addition to O-SAM, a distributed synchronous array method (D-SAM) is proposed, and its performance is also evaluated. In the second part of this thesis, we focus on the power scheduling problem for multi-input multi-output (MIMO) relay networks. A generalized water filling (GWF) theorem is established for link rate maximization with multiple power constraints. The corresponding GWF algorithm is a fast solution to an important class of convex optimization problems. The GWF algorithm is a useful building block for joint source and relay optimization for a multiuser MIMO relay network. We study the power scheduling problems for both uplink and downlink cases of the multiuser MIMO relay network. A number of computational strategies are proposed to maximize the sum rate subject to power constraints or to minimize the sum power subject to rate constraints.

Download or read book Advanced Trends in Wireless Communications written by Mutamed Khatib and published by BoD – Books on Demand. This book was released on 2011-02-17 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical limitations on wireless communication channels impose huge challenges to reliable communication. Bandwidth limitations, propagation loss, noise and interference make the wireless channel a narrow pipe that does not readily accommodate rapid flow of data. Thus, researches aim to design systems that are suitable to operate in such channels, in order to have high performance quality of service. Also, the mobility of the communication systems requires further investigations to reduce the complexity and the power consumption of the receiver. This book aims to provide highlights of the current research in the field of wireless communications. The subjects discussed are very valuable to communication researchers rather than researchers in the wireless related areas. The book chapters cover a wide range of wireless communication topics.

Download or read book Telecommunications Engineering Principles And Practice written by Amoakoh Gyasi-agyei and published by World Scientific. This book was released on 2019-06-19 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers basic principles of telecommunications and their applications in the design and analysis of modern networks and systems. Aimed to make telecommunications engineering easily accessible to students, this book contains numerous worked examples, case studies and review questions at the end of each section. Readers of the book can thus easily check their understanding of the topics progressively. To render the book more hands-on, MATLAB® software package is used to explain some of the concepts. Parts of this book are taught in undergraduate curriculum, while the rest is taught in graduate courses.Telecommunications Engineering: Theory and Practice treats both traditional and modern topics, such as blockchain, OFDM, OFDMA, SC-FDMA, LPDC codes, arithmetic coding, polar codes and non-orthogonal multiple access (NOMA).

Download or read book Communications and Networking written by Jun Peng and published by BoD – Books on Demand. This book was released on 2010-09-28 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book "Communications and Networking" focuses on the issues at the lowest two layers of communications and networking and provides recent research results on some of these issues. In particular, it first introduces recent research results on many important issues at the physical layer and data link layer of communications and networking and then briefly shows some results on some other important topics such as security and the application of wireless networks. In summary, this book covers a wide range of interesting topics of communications and networking. The introductions, data, and references in this book will help the readers know more abut this topic and help them explore this exciting and fast-evolving field.

Download or read book Advanced Building Materials and Structural Engineering written by B. Xu and published by Trans Tech Publications Ltd. This book was released on 2012-02-10 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). These 188 papers, presented at the 2012 International Conference on Building Materials and Structural Engineering (BMSE2012), are divided into chapters devoted to: 1: Advanced Materials Engineering and Dynamic Systems, 2: Building Materials, Mechanical Engineering and the Environment, 3: Materials Processing Technology and Mining Engineering, 4: New Materials, Applications and Processes, 5: Biotechnology, Chemical and Materials Engineering and 6: Materials Science, Mechanics and its Application.

Download or read book Wireless Network Traffic and Quality of Service Support Trends and Standards written by Lagkas, Thomas D. and published by IGI Global. This book was released on 2010-03-31 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book offers cutting edge approaches for the provision of quality of service in wireless local area networks"--Provided by publisher.