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Author: Yalçın Şadi
Publisher:
ISBN:
Category : Wireless communication systems
Languages : en
Pages : 370
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Book Description
Author: Yalçın Şadi
Publisher:
ISBN:
Category : Wireless communication systems
Languages : en
Pages : 370
Get Book Here
Book Description
Author: Randal Berry
Publisher: Springer Nature
ISBN: 3031792548
Category : Computers
Languages : en
Pages : 84
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Book Description
Packet delay and energy consumption are important considerations in wireless and sensor networks as these metrics directly affect the quality of service of the application and the resource consumption of the network; especially, for a rapidly growing class of real-time applications that impose strict restrictions on packet delays. Dynamic rate control is a novel technique for adapting the transmission rate of wireless devices, almost in real-time, to opportunistically exploit time-varying channel conditions as well as changing traffic patterns. Since power consumption is not a linear function of the rate and varies significantly with the channel conditions, adapting the rate has significant benefits in minimizing energy consumption. These benefits have prompted significant research in developing algorithms for achieving optimal rate adaptation while satisfying quality of service requirements. In this book, we provide a comprehensive study of dynamic rate control for energy minimization under packet delay constraints. We present several formulations and approaches adopted in the literature ranging from discrete-time formulations and dynamic programming based solutions to continuous-time approaches utilizing ideas from network calculus and stochastic optimal control theory. The goal of this book is to expose the reader to the important problem of wireless data transmission with delay constraints and to the rich set of tools developed in recent years to address it. Table of Contents: Introduction / Transmission Rate Adaptation under Deadline Constraints / Average Delay Constraints
Author: Kristina Wheatman
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The prevalence of mobile devices has exponentially increased our ability to connect on an international level, swiftly accompanied by the popularity of communicating through the medium of multimedia. However, networking and processing requirements for exchanging images and videos are often orders of magnitude larger than those of text or even audio files. The research focuses on meeting and optimizing these pressing demands in the presence of competition for wireless network resources. Comprehensive solutions to energy-aware dual-path network utility maximization for crowdsourced image processing are derived and optimized. A delay resistant trace-based heuristic for distributed implementation that closely follows ideal algorithm behavior is developed. An iterative update solution to achieve maximum utility within a given time horizon using experimentally derived energy constraints is presented. Novel schemes for 5G network resource allocation and video streaming algorithms are provided. The research delivers a thorough analysis of all associated trade-offs in maximizing user Quality of Experience (QoE) while simultaneously minimizing associated energy consumption on mobile devices, as these goals are often in direct conflict with one another. Comparison of existing algorithms and proposed solutions are provided.
Author: Tho Le-Ngoc
Publisher: Springer
ISBN: 3319576933
Category : Technology & Engineering
Languages : en
Pages : 124
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Book Description
This SpringerBrief presents radio resource allocation schemes for buffer-aided communications systems over fading channels under statistical delay constraints in terms of upper-bounded average delay or delay-outage probability. This Brief starts by considering a source-destination communications link with data arriving at the source transmission buffer. The first scenario, the joint optimal data admission control and power allocation problem for throughput maximization is considered, where the source is assumed to have a maximum power and an average delay constraints. The second scenario, optimal power allocation problems for energy harvesting (EH) communications systems under average delay or delay-outage constraints are explored, where the EH source harvests random amounts of energy from renewable energy sources, and stores the harvested energy in a battery during data transmission. Online resource allocation algorithms are developed when the statistical knowledge of the random channel fading, data arrivals, EH processes governing the system dynamics is unknown a-priori. This Brief continues with a source-relay-destination communications link with buffers available at both source and relay, as part of a multi-hop network. Optimal resource allocation schemes for this 3-node relaying system to maximize its effective capacity under a delay-outage constraint are proposed, with special emphasis on relay roles: Half-duplex (HD) or full-duplex (FD) relay operation. With HD relay, the adaptive link selection relaying problem jointly with both fixed and adaptive power allocation schemes is investigated. Within each transmission frame, either the source-relay link or the relay-destination link is selected to be active depending on the channel conditions. With FD relay under the presence of non-zero residual self-interference (SI). This Brief also presents source and relay power allocation schemes for both cases of available knowledge of the channel state information at transmitter (CSIT): instantaneous or statistical. Professional and researchers working in this related field and advanced-level students in electrical or computer engineering will find the content valuable as a reference.
Author: Tony Q. S. Quek
Publisher: Cambridge University Press
ISBN: 1107142660
Category : Computers
Languages : en
Pages : 499
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Book Description
The first book on Cloud Radio Access Networks (C-RANs), covering fundamental theory, current techniques, and potential applications.
Author: Leonidas Georgiadis
Publisher: Now Publishers Inc
ISBN: 1933019263
Category : Technology & Engineering
Languages : en
Pages : 161
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Book Description
Information flow in a telecommunication network is accomplished through the interaction of mechanisms at various design layers with the end goal of supporting the information exchange needs of the applications. In wireless networks in particular, the different layers interact in a nontrivial manner in order to support information transfer. In this text we will present abstract models that capture the cross-layer interaction from the physical to transport layer in wireless network architectures including cellular, ad-hoc and sensor networks as well as hybrid wireless-wireline. The model allows for arbitrary network topologies as well as traffic forwarding modes, including datagrams and virtual circuits. Furthermore the time varying nature of a wireless network, due either to fading channels or to changing connectivity due to mobility, is adequately captured in our model to allow for state dependent network control policies. Quantitative performance measures that capture the quality of service requirements in these systems depending on the supported applications are discussed, including throughput maximization, energy consumption minimization, rate utility function maximization as well as general performance functionals. Cross-layer control algorithms with optimal or suboptimal performance with respect to the above measures are presented and analyzed. A detailed exposition of the related analysis and design techniques is provided.
Author: Hithesh Nama
Publisher:
ISBN: 9780549195498
Category : Resource allocation
Languages : en
Pages : 140
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Book Description
In this dissertation, we study resource allocation in networks comprised of wireless devices that are energy-constrained. Depending on the degree of collaboration among the nodes and the nature of communication a wide variety of networks emerge. At one end of the spectrum are wireless sensor networks that are designed to cooperatively perform a common task. At the other end of the spectrum are ad-hoc networks of selfish agents that wish to communicate with other agents while attempting to keep their individual energy costs to a minimum.
Author: Liansheng Tan
Publisher: CRC Press
ISBN: 1498769454
Category : Technology & Engineering
Languages : en
Pages : 503
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Book Description
This book provides a comprehensive introduction to the underlying theory, design techniques and analytical results of wireless communication networks, focusing on the core principles of wireless network design. It elaborates the network utility maximization (NUM) theory with applications in resource allocation of wireless networks, with a central aim of design and the QoS guarantee. It presents and discusses state-of-the-art developments in resource allocation and performance optimization in wireless communication networks. It provides an overview of the general background including the basic wireless communication networks and the relevant protocols, architectures, methods and algorithms.
Author: Chen Chen
Publisher: Springer
ISBN: 3030193926
Category : Technology & Engineering
Languages : en
Pages : 132
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Book Description
This book introduces the sources and historic collection campaigns of resource allocation in wireless communication systems. The unique characteristics of MIMO-OFDMA systems are thoroughly studied and summarized. Remarks on resource allocation and spectrum sharing are also presented, which demonstrate the great value of resource allocation techniques, but also introduce distinct challenges of resource allocation in MIMO-OFDMA systems. Novel resource allocation techniques for OFDMA Systems are surveyed from various applications (e.g., for unicast, or multicast with Guaranteed BER and Rate, subcarrier and power allocation with various detectors, low-complexity energyefficient resource allocation, etc.) in this book. Due to the high mobility and low latency requirements of 5G wireless communications, this book discusses how to deal with the imperfect CSI. It also discusses how to deal with e.g., throughput maximization, outage probabilities maximization and guarantee, energy efficiency, physical-layer security issues with feedback channel capacity constraints, in order to characterize and understand the applications of practical scenes. This book will target professionals & researchers working in the fields of Wireless Communications and Networking, Resource Allocation and Transmissions. Advanced-level students in electrical engineering and computer science will also find this book useful as a secondary textbook.
Author: Bo Ji
Publisher: Morgan & Claypool Publishers
ISBN: 1627059830
Category : Computers
Languages : en
Pages : 132
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Book Description
The last decade has seen an unprecedented growth in the demand for wireless services. These services are fueled by applications that often require not only high data rates, but also very low latency to function as desired. However, as wireless networks grow and support increasingly large numbers of users, these control algorithms must also incur only low complexity in order to be implemented in practice. Therefore, there is a pressing need to develop wireless control algorithms that can achieve both high throughput and low delay, but with low-complexity operations. While these three performance metrics, i.e., throughput, delay, and complexity, are widely acknowledged as being among the most important for modern wireless networks, existing approaches often have had to sacrifice a subset of them in order to optimize the others, leading to wireless resource allocation algorithms that either suffer poor performance or are difficult to implement. In contrast, the recent results presented in this book demonstrate that, by cleverly taking advantage of multiple physical or virtual channels, one can develop new low-complexity algorithms that attain both provably high throughput and provably low delay. The book covers both the intra-cell and network-wide settings. In each case, after the pitfalls of existing approaches are examined, new systematic methodologies are provided to develop algorithms that perform provably well in all three dimensions.
