Skip to main content

Cross Layer Resource Allocation In Wireless Communications

In Order to Read Online or Download Cross Layer Resource Allocation In Wireless Communications Full eBooks in PDF, EPUB, Tuebl and Mobi you need to create a Free account. Get any books you like and read everywhere you want. Fast Download Speed ~ Commercial & Ad Free. We cannot guarantee that every book is in the library!

Cross Layer Resource Allocation in Wireless Communications

Cross Layer Resource Allocation in Wireless Communications Book
Author : Ana I. Perez-Neira,Marc Realp Campalans
Publisher : Academic Press
Release : 2010-07-28
ISBN : 9780080920887
Language : En, Es, Fr & De

GET BOOK

Book Description :

Cross-Layer Resource Allocation in Wireless Communications offers practical techniques and models for the design and optimisation of cross-layer resource allocation – one of the hottest topics in wireless communications. Resource allocation in wireless networks is traditionally approached either through information theory or communications networks. To break down the barriers between these distinct approaches, this book bridges the physical and network layers by providing cross-layer resource allocation techniques, models, and methodologies. Its unique approach allows optimisation of network resources and will enable engineers to improve signal quality, enhance network and spectrum utilization, increase throughput, and solve the problem of shadowing. Topics covered include different views of spectral efficiency, the role of spatial diversity, of delay in resource allocation, and possible extensions to OFDMA systems. This will be an ideal reference on cross-layer resource allocation between the PHY and MAC layers for R&D and network design engineers and researchers in universities dealing with sensor networks and cognitive systems. * Gives a full description of the characteristics of the PHY layer that promote efficient resource allocation strategies * Gives special emphasis on cross-layer design for spatial diversity schemes * Provides a framework for interaction between the PHY and MAC layers, their parameters of performance and their relationship * Presents resource allocation as a cross-layer design based on an optimization of MAC layer parameters with an accurate model of the PHY layer

Cross Layer Resource Allocation For Multiple User Video Communication Systems

Cross Layer Resource Allocation For Multiple User Video Communication Systems Book
Author : Dawei Wang
Publisher : Unknown
Release : 2013
ISBN : 9781303429651
Language : En, Es, Fr & De

GET BOOK

Book Description :

In this dissertation, we investigate problems of resource allocation for uplink multiuser wireless communication channels. The users want to upload compressed video streams with different rate-distortion (RD) characteristics to a base station via a multi-carrier channel. The video is organized in groups of pictures (GOP), and the base station makes resource allocation decisions based jointly on the channel state information (CSI) and the RD information to minimize the average video distortion across all users. We first study the case where the channel is slowly varying. With the assumption of the channel staying constant over the duration of a GOP, we derive an optimal condition for minimizing the sum of distortions in a setting of continuous frequency channel response. Our result shows that for a specific band to be assigned to a particular user, the product of the slope of the RD curve of that user and a marginal rate increment corresponding to that band should be maximized. We then design an algorithm which iteratively calculates the status of the RD information and the CSI in a block fading setting. Compared to two baseline resource allocation algorithms that use only a single layer of information, the simulation results show that the cross layer scheme can consistently improve the performance of the system. We then focus on the case of a channel with arbitrary mobility. To better utilize the time varying channel, we design a pilot symbol assisted modulation (PSAM) system which periodically adapts the modulation format according to the instantaneous CSI. We show that the two baseline algorithms with single layer information behave quite differently as the Doppler spread changes, but the cross layer algorithm performs robustly across all different mobile speeds. We further characterize the capacity gain of using the cross layer scheme.

Dynamic Optimized Resource Allocation in Cellular Wireless Networks with Software Interface

Dynamic Optimized Resource Allocation in Cellular   Wireless Networks with Software Interface Book
Author : Michel Matta,Mahmoud Khodor
Publisher : Unknown
Release : 2015
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

In the past years, there has been a huge advance in the structure and design of wireless networks, and we have seen significant variation form the physical layer algorithm development to the layer protocol design to the system level optimization. Numerous wireless standards have been agreed on to keep up with demand of multiple applications. Over the years researchers came together and realized that for wireless networks, and because of user mobility, fading channel and power resources, and other factors we cannot simply optimize the wireless communication like we used to optimize the wired networks, where they usually concentrate on one layer without paying any attention on the effects it has on other layers. But for wireless networks, interconnection between layers and cross layer optimization is the basic issue to insure high quality performance. One of the most important issues in the cross layer optimization is resource allocation. In Wireless communication there are frequency, time and space diversity as well. If we took advantages of those diversities we can tremendously improve the quality of communication. All those variables contribute to the need of resource allocations. We have seen the advance of resource allocation in the past years with huge progress. As anyone can imagine, because the number of degrees freedom, and multiple parameters, dynamic resource allocation is a broad topic that deals with variety of problems. So the optimization tools and techniques may vary a lot. Aside from the commonly used method which is convex optimization there are non-linear and non-convex methods. When we speak about channel allocation and resource scheduling. Sometimes the problem tends to get more and more complicated. If we took into account the time caring conditions, the problem will evolve to be a dynamic optimization. The cooperation with the distributed and autonomous devices is considered, different mathematical models can be used to find the best strategy and optimal solution. It is only fair to say that there is no single perfect optimization available to solve all the dynamic resource allocation problems.

Cross layer Resource Allocation and Quality of Service Optimization Design Over 4th Generation Wireless Systems

Cross layer Resource Allocation and Quality of Service Optimization Design Over 4th Generation Wireless Systems Book
Author : Amir Shadmand,King's College London. Department of Electronic & Electrical Engineering,King's College London. Centre for Telecommunications Research
Publisher : Unknown
Release : 2011
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

The growth in wireless communication systems implies the exchange of large amounts of heterogeneous information using limited radio resources. Adaptive transmission power and rate control are two key aspects in optimum radio resource sharing with the potential to enhance performance. Adaptive algorithms are vital features of radio resource management in 4th generation (4G) communication systems and succeeding technologies as well as non-cellular systems. In this thesis novel adaptive scheduling and resource allocation techniques are developed in the context of Orthogonal Frequency Division Multiple Access (OFDMA). In this development transmitter and Quality of Service (QoS) constraints are imposed so as to maintain communication cost effectiveness and quality. -- This thesis makes several contributions. First, in the proposed scheduling and resource allocation method, system throughput, QoS constraints, and scheduling fairness are jointly integrated into a framework. This framework dynamically performs radio resource-allocation for multiple users, and effectively chooses optimal system parameters such as power and modulation rate to adapt to the varying channel quality of each resource block. In such systems, frequency-time resources are dynamically shared between users to enhance overall spectral efficiency. -- Second, the problem of maximizing the sum rate of two interfering users, while limiting the received interference at each user, in an OFDMA-based system operating in downlink is considered. In a cooperative two cell scenario, for each particular user (located in the edge of cooperative cell and within area common with neighboring cell), it is possible to incorporate the dominant interference effects of the neighboring cells within the received noise level.

Quality of Service and Resource Allocation in WiMAX

Quality of Service and Resource Allocation in WiMAX Book
Author : Roberto Hincapie,Javier E. Sierra
Publisher : BoD – Books on Demand
Release : 2012-02-03
ISBN : 9533079568
Language : En, Es, Fr & De

GET BOOK

Book Description :

This book has been prepared to present state of the art on WiMAX Technology. It has been constructed with the support of many researchers around the world, working on resource allocation, quality of service and WiMAX applications. Such many different works on WiMAX, show the great worldwide importance of WiMAX as a wireless broadband access technology. This book is intended for readers interested in resource allocation and quality of service in wireless environments, which is known to be a complex problem. All chapters include both theoretical and technical information, which provides an in depth review of the most recent advances in the field for engineers and researchers, and other readers interested in WiMAX.

Machine Learning for Future Wireless Communications

Machine Learning for Future Wireless Communications Book
Author : Fa-Long Luo
Publisher : John Wiley & Sons
Release : 2020-02-10
ISBN : 1119562252
Language : En, Es, Fr & De

GET BOOK

Book Description :

A comprehensive review to the theory, application and research of machine learning for future wireless communications In one single volume, Machine Learning for Future Wireless Communications provides a comprehensive and highly accessible treatment to the theory, applications and current research developments to the technology aspects related to machine learning for wireless communications and networks. The technology development of machine learning for wireless communications has grown explosively and is one of the biggest trends in related academic, research and industry communities. Deep neural networks-based machine learning technology is a promising tool to attack the big challenge in wireless communications and networks imposed by the increasing demands in terms of capacity, coverage, latency, efficiency flexibility, compatibility, quality of experience and silicon convergence. The author – a noted expert on the topic – covers a wide range of topics including system architecture and optimization, physical-layer and cross-layer processing, air interface and protocol design, beamforming and antenna configuration, network coding and slicing, cell acquisition and handover, scheduling and rate adaption, radio access control, smart proactive caching and adaptive resource allocations. Uniquely organized into three categories: Spectrum Intelligence, Transmission Intelligence and Network Intelligence, this important resource: Offers a comprehensive review of the theory, applications and current developments of machine learning for wireless communications and networks Covers a range of topics from architecture and optimization to adaptive resource allocations Reviews state-of-the-art machine learning based solutions for network coverage Includes an overview of the applications of machine learning algorithms in future wireless networks Explores flexible backhaul and front-haul, cross-layer optimization and coding, full-duplex radio, digital front-end (DFE) and radio-frequency (RF) processing Written for professional engineers, researchers, scientists, manufacturers, network operators, software developers and graduate students, Machine Learning for Future Wireless Communications presents in 21 chapters a comprehensive review of the topic authored by an expert in the field.

Bl tter des Kulturbundes Jena

Bl  tter des Kulturbundes Jena Book
Author : Anonim
Publisher : Unknown
Release : 1946
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Bl tter des Kulturbundes Jena book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Adaptation and Cross Layer Design in Wireless Networks

Adaptation and Cross Layer Design in Wireless Networks Book
Author : Mohamed Ibnkahla
Publisher : CRC Press
Release : 2018-10-08
ISBN : 1420046101
Language : En, Es, Fr & De

GET BOOK

Book Description :

Adaptive techniques play a key role in modern wireless communication systems. The concept of adaptation is emphasized in the Adaptation in Wireless Communications Series through a unified framework across all layers of the wireless protocol stack ranging from the physical layer to the application layer, and from cellular systems to next-generation wireless networks. Adaptation and Cross Layer Design in Wireless Networks is devoted to adaptation in the data link layer, network layer, and application layer. The book presents state-of-the-art adaptation techniques and methodologies, including cross-layer adaptation, joint signal processing, coding and networking, selfishness in mobile ad hoc networks, cooperative and opportunistic protocols, adaptation techniques for multimedia support, self –organizing routing, and tunable security services. It presents several new theoretical paradigms and analytical findings which are supported with various simulation and experimental results. Adaptation in wireless communications is needed in order to achieve high capacity and ubiquitous communications. The current trend in wireless communication systems is to make adaptation dependent upon the state of the relevant parameters in all layers of the system. Focusing on simplified cross layer design approaches, this volume describes advanced techniques such as adaptive resource management, adaptive modulation and coding, 4G communications, QoS, diversity combining, and energy and mobility aware MAC protocols. The first volume in the series, Adaptive Signal Processing in Wireless Communications (cat no.46012) covers adaptive signal processing at the physical layer.

Resource Allocation for Wireless Networks

Resource Allocation for Wireless Networks Book
Author : Zhu Han,K. J. Ray Liu
Publisher : Cambridge University Press
Release : 2008-04-14
ISBN : 1139470248
Language : En, Es, Fr & De

GET BOOK

Book Description :

Do you need to improve wireless system performance? Learn how to maximise the efficient use of resources with this systematic and authoritative account of wireless resource management. Basic concepts, optimization tools and techniques, and application examples, are thoroughly described and analysed, providing a unified framework for cross-layer optimization of wireless networks. State-of-the-art research topics and emerging applications, including dynamic resource allocation, cooperative networks, ad hoc/personal area networks, UWB, and antenna array processing, are examined in depth. If you are involved in the design and development of wireless networks, as a researcher, graduate student or professional engineer, this is a must-have guide to getting the best possible performance from your network.

Cooperative Wireless Communications

Cooperative Wireless Communications Book
Author : Yan Zhang,Hsiao-Hwa Chen,Mohsen Guizani
Publisher : CRC Press
Release : 2009-03-10
ISBN : 9781420064704
Language : En, Es, Fr & De

GET BOOK

Book Description :

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 with cooperative wireless communications, researchers and product developers need a succinct understanding of relevant theory, fundamentals, and techniques to navigate this challenging field. Cooperative Wireless Communications provides just that. Assesses Applications, Benefits, and Methods of Cooperative Strategies This comprehensive reference handbook contains useful background to develop and implement cooperative mechanisms for infrastructure-based wireless systems and self-organizing multi-hop wireless networks (e.g., ad hoc, mesh, peer-to-peer, and sensor networks). It introduces key cooperative strategies and details recent improvements to a variety of cooperative mechanisms and frameworks applicable in diverse scenarios. Addressing fundamentals and techniques, this invaluable reference: Offers comprehensive guidance on technical, practical, and deployment aspects of cooperative strategies and the latest IEEE standard specifications Explores key challenges and solutions in 3G, B3G, 4G WiMAX, and ad hoc, mesh, and sensor networks Covers cooperative diversity, virtual MIMO, cognitive radio networks, and resource and mobility management Discusses energy efficiency, relaying strategy, routing, MAC, topology control, and security Provides Guidance to Resolve Key Challenges A distinct introduction to different cooperative mechanisms, cooperation frameworks in diverse scenarios, and recent improvements to wireless network performance, this one-stop reference consolidates the essential information and guidance that readers will need to resolve key challenges in various protocol issues from a cooperation perspective.

Distributed Antenna Systems

Distributed Antenna Systems Book
Author : Honglin Hu,Yan Zhang,Jijun Luo
Publisher : Auerbach Publications
Release : 2007-06-27
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

A technical guide that covers the fundamental concepts, advances and open issues of the Distributed Antenna Systems (DAS). It explores the topic with various key challenges in diverse scenarios, including architecture, capacity, connectivity, scalability, medium access control, scheduling, dynamic channel assignment and cross-layer optimization.

Cross Layer Resource Allocation in Cognitive Radio Networks Models Algorithms and Applications

Cross Layer Resource Allocation in Cognitive Radio Networks  Models  Algorithms  and Applications Book
Author : Hang Qin
Publisher : Scientific Research Publishing, Inc. USA
Release : 2017-04-30
ISBN : 1618963988
Language : En, Es, Fr & De

GET BOOK

Book Description :

This book is about cognitive radio (CR), a revolution in radio technology and an enabling technology for dynamic spectrum access. Due to the unique characteristics of the wireless networks, it is essential to address the approach of multiple layers (e.g., physical, link, and network) to maximize the network performance. The formulation of this cross-layer problem is usually complicated and challenging, while wireless resource allocation is a vital way to handle the race condition of the limited wireless resources. However, given the intrinsic characteristics of cognitive radio networks (CRN), none of the existing analytical approach could be a direct fit. Therefore, innovative theoretical results, along with the corresponding mathematical techniques, are necessary. In this book, we aim to develop some novel algorithmic design and optimization techniques that provide optimal or near-optimal solutions. Although cross-layer design has been introduced to CRN for many years, there are rarely any books for researchers, engineers, and students, from the engineering perspective. From one hand, most of the existing books primarily focus on the mathematical and economic aspects, which are considerably different from the engineering. On the other hand, all of the books mainly aim to system optimization or control techniques, while the cross-layer algorithm design in the distributed environment is usually ignored. As the result, there is an urgent demand for a reference source, which can provide complete information on how to fully adopt cross-layer resource allocation to the CRN. In this regard, this book not only focuses on the description of the main aspects of cross-layer resource allocation over CRN, but also provides a review of the application solutions. In a nutshell, it provides a specific treatment of cross-layer design in CRN. The topics range from the basic concepts of cross-layer resource allocation, to the state-of-the-art analyses, modelings, and optimizations for CRN.

Adaptation in Wireless Communications 2 Volume Set

Adaptation in Wireless Communications   2 Volume Set Book
Author : Mohamed Ibnkahla
Publisher : CRC Press
Release : 2018-10-08
ISBN : 1482290332
Language : En, Es, Fr & De

GET BOOK

Book Description :

The widespread use of adaptation techniques has helped to meet the increased demand for new applications. From adaptive signal processing to cross layer design, Adaptation in Wireless Communications covers all aspects of adaptation in wireless communications in a two-volume set. Each volume provides a unified framework for understanding adaptation and relates various specializations through common terminologies. In addition to simplified state-of-the-art cross layer design approaches, they also describe advanced techniques, such as adaptive resource management, 4G communications, and energy and mobility aware MAC protocols.

Channel Aware Scheduling and Resource Allocation with Cross Layer Optimization in Wireless Networks

Channel Aware Scheduling and Resource Allocation with Cross Layer Optimization in Wireless Networks Book
Author : Sheu-Sheu Tan
Publisher : Unknown
Release : 2013
ISBN : 9781267995414
Language : En, Es, Fr & De

GET BOOK

Book Description :

We develop channel aware scheduling and resource allocation schemes with cross-layer optimization for several problems in multiuser wireless networks. We consider problems of distributed opportunistic scheduling, where multiple users contend to access the same set of channels. Instead of scheduling users to the earliest available idle channels, we also take the instantaneous channel quality into consideration and schedule the users only when the channel quality is sufficiently high. This can lead to significant gains in throughput compared to system where PHY and MAC layers are designed separately and the wireless fading channels are abstracted as time invariant, fixed rate channels for scheduling purposes. We first consider opportunistic spectrum access in a cognitive radio network, where a secondary user (SU) share the spectrum opportunistically with incumbent primary users (PUs). Similar to earlier works on distributed opportunistic scheduling (DOS), we maximize the throughput of SU by formulating the channel access problem as a maximum rate-of-return problem in the optimal stopping theory framework. We show that the optimal channel access strategy is a pure threshold policy, namely the SU decides to use or skip transmission opportunities by comparing the channel qualities to a fixed threshold. We further increase the spectrum utilization by interleaving SU's packets with periodic sensing to detect PU's return. We jointly optimize the rate threshold and the packet transmission time to maximize the average throughput of SU, while limiting interference to PU. Next, we develop channel-aware opportunistic spectrum access strategies in a more general cognitive radio network with multiple SUs. Here, we additionally take into account the collisions and complex interaction between SUs and sharing of resources between them. We derive strategies for both cooperative settings where SUs maximize their sum total of throughputs, as well as non-cooperative game theoretic settings, where each SU tries to maximize its own throughput. We show that the optimal schemes for both scenarios are pure threshold policies. In the non-cooperative case, we establish the existence of Nash equilibrium and develop best response strategies that can converge to equilibria, with SUs relying only on their local observations. We study the trade-off between maximal throughput in the cooperative setting and fairness in the non-cooperative setting, and schemes based on utility functions and pricing that mitigate this tradeoff. In addition to maximizing throughput and fair sharing of resources, it is important to consider network/scheduling delays for QoS performance of delay-sensitive applications. We study DOS under both network-wide and user-specific average delay constraints. We take a stochastic Lagrangian approach and characterize the corresponding optimal scheduling policies accordingly, and show that they have a pure threshold structure. Next, we consider the use of different types of channel quality information, i.e., channel state information (CSI) and channel distribution information (CDI) in the opportunistic scheduling design for MIMO ad hoc networks. CSI is highly dynamic in nature and provides time diversity in the wireless channel, but is difficult to track. CDI offers temporal stability, but is incapable of capturing the instantaneous channel conditions. We design a new class of cross-layer opportunistic channel access scheduling framework for MIMO networks where CDI is used in the network context to group the simultaneous transmission links for spatial channel access and CSI is used in the link context to decide when and which link group should transmit based on a pre designed threshold. We thereby reap the benefits of both the temporal stability of CDI and the time diversity of CSI. Finally, we consider a novel application of cross layer optimization for communication of progressive coded images over OFDM wireless fading channels. We first consider adaptive modulation based on the instantaneous channel state information. An algorithm is proposed to allocate power and constellation size at each subchannel by maximizing the throughput. We next consider both the variance and the average of the throughput when deciding the constellation size for adaptive modulation. Simulation results confirm that cross-layer optimization with adaptive modulation enhances system performance.

Physical and Cross Layer Security Enhancement and Resource Allocationfor Wireless Networks

Physical and Cross Layer Security Enhancement and Resource Allocationfor Wireless Networks Book
Author : Muhammad Shafi Al Bashar
Publisher : Unknown
Release : 2011
ISBN : 9781124906454
Language : En, Es, Fr & De

GET BOOK

Book Description :

In this dissertation, we present novel physical (phy) and cross-layer design guidelines and resource adaptation algorithms to improve the security and user experience in the future wireless networks. Physical and cross-layer wireless security measures can provide stronger overall security with high efficiency and can also provide better flexibility in response to the typically time-varying wireless environment. To better utilize limited wireless resources, we present approaches and techniques based on new performance criteria for wireless system optimization by thoroughly exploiting user information including its Quality of Service (QoS) requests and channel state information (csi) to improve network throughput and security. In recent years, there has been a growing research interest in wireless system security from phy layer perspective. In a wiretap channel model introduced in the seminal work by Wyner, a sender "Alice" wishes to transmit a secret message to the intended receiver "Bob" in presence of a passive eavesdropper "Eve". Existing works have characterized maximum achievable secrecy rate or secrecy capacity for single- and multiple-antenna systems by applying Gaussian signaling and secrecy code. Despite the impracticality of Gaussian input, its compact closed-form expression of mutual information motivated the wide use of Gaussian input assumption in theoretical analysis. In contrast to the Gaussian codebook, practical wiretap codes must consist of finite-alphabet symbols. Because of this constraint, the achievable secrecy rate for a finite-alphabet input scenario would differ from the secrecy rate achievable by a Gaussian codebook. In this thesis, we quantify the effect of finite discrete-constellation on instantaneous and ergodic secrecy rate of multiple-antenna wire-tap channels. Our results demonstrate substantial performance difference between systems involving finite-alphabet inputs and systems with Gaussian inputs. In addition, we investigate the secrecy performance of multi-terminal wiretap systems when a codebook based transmission beamforming is implemented. We characterize the secrecy outage probability of a communication link under eavesdropping. We consider a limited feedback scenario where the transmitter uses a pre-defined codebook known to both the transmitter and the receiver for beamforming, and analyze the secrecy outage probability of the link when it being eavesdropped. Next, we consider the security of wireless multi-hop networks. Certainly, network security is an overarching issue that transcends all layers of communication protocol stack. Therefore, we tackle the problem of network security by proper user scheduling, routing, and resource management. Our approach of secrecy is complementary to the traditional cryptography based techniques. Together, they can provide stronger overall security and flexibility in selecting the desired solution and can reduce bandwidth and energy overhead as much as possible. Multi-hop wireless networks frequently employ the traditional routing and resource allocation strategies. Such strategies often fail to take into account the additional need for protection against security vulnerabilities due to the wireless medium. Thus, to address security concerns, we investigate the problem of eavesdropping control by proposing security-aware power allocation strategies and routing algorithms for multi-hop networks. The future wireless infrastructure will consists of a plethora of heterogeneous collections of applications and services. A differentiated service structure would therefore be an essential part of the future wireless infrastructure. In addition to the security consideration of wireless network, we focus on the heterogeneous structure of the network. We study the problem of cross-layer resource allocation and admission control in a multiuser heterogeneous ofdma network providing both QoS-constrained user services and best-effort services. Such heterogeneous networks provide service to both High-Priority (hp) users and Best-Effort (be) users. By clustering subcarriers, efficient algorithms for cluster and power allocation have been proposed. Our strategy maximizes the total network utility of the be users while satisfying the QoS request for maximum number of hp users. The feasibility of the resource allocation problem depends on the number of hp users in the network. Since a large number of demanding hp users would render the resource allocation problem infeasible, a joint admission control and resource allocation scheme could be an efficient way of tackling both problems with less overhead. By incorporating admission control, we propose an efficient and optimal joint admission control and resource allocation algorithm. [The dissertation citations contained here are published with the permission of ProQuest llc. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.].

On Resource Optimization and Robust CQI Reporting for Wireless Communication Systems

On Resource Optimization and Robust CQI Reporting for Wireless Communication Systems Book
Author : Ayaz Ahmad
Publisher : Unknown
Release : 2011
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Adaptive resource allocation in wireless communication systems is crucial in order to support the diverse QoS needs of the services and optimize resource utilization. The design of resource allocation schemes should consider the service type for which it is intended. Moreover, due to feedback delay and channel estimation error, the Channel Quality Indicator (CQI) reported to the transmitter may not be a perfect measure of the channel quality and its use for resource allocation may severely degrade the systems performance. In this thesis, we study resource allocation and CQI reporting for wireless networks while taking the aforementioned factors into consideration. First, we consider resource allocation and adaptive modulation in uplink SC-FDMA systems. This is a combinatorial problem whose optimal solution is exponentially complex. We use canonical duality theory to derive a polynomial complexity resource allocation algorithm that provides a nearly optimal solution to the problem. Then, we focus on resource allocation for video streaming in wireless networks with time-varying interference. To this end, by using risk-sensitive control approach, we develop a cross-layer optimization framework that performs power control at the PHY/MAC layer and rate adaptation at the APPLICATION layer jointly and provides fairness among nodes. Finally, by using stochastic control and game theory, we design a robust best-M CQI reporting scheme for multi-carrier and multi-user systems which takes into account the impact of feedback delay and error in CQI computation. Performing resource allocation on the basis of the proposed CQI reporting can significantly improve the system performance.

Design Methods for Optimal Resource Allocation in Wireless Networks

Design Methods for Optimal Resource Allocation in Wireless Networks Book
Author : Mohammad Faisal Uddin
Publisher : Unknown
Release : 2012
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Design Methods for Optimal Resource Allocation in Wireless Networks book written by Mohammad Faisal Uddin, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Cross layer Medium Access and Congestion Control for Wireless Networks

Cross layer Medium Access and Congestion Control for Wireless Networks Book
Author : Yingqun Yu
Publisher : Unknown
Release : 2007
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Cross layer Medium Access and Congestion Control for Wireless Networks book written by Yingqun Yu, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Resource Allocation in Unlicensed Long Term Evolution HetNets

Resource Allocation in Unlicensed Long Term Evolution HetNets Book
Author : Huaqing Zhang,Sami Khairy,Lin X. Cai,Zhu Han
Publisher : Springer
Release : 2017-12-29
ISBN : 3319683128
Language : En, Es, Fr & De

GET BOOK

Book Description :

This SpringerBrief investigates cross layer resource allocation in unlicensed LTE (Long Term Evolution) HetNets. Specifically, the authors study and cover the radio access management of unlicensed LTE to allow efficient spectrum utilization and harmonious coexistence with other unlicensed systems in this brief. Efficient radio access protocols are developed to allow unlicensed LTE users to fair share channel access with unlicensed users in different systems, including Wi-Fi and unlicensed LTE of other operators. An analytical model is developed to study the performance of the proposed protocols. To achieve efficient spectrum sharing among various unlicensed users, the authors further formulate a resource allocation problem based on Nobel Prize winning game theory framework, and propose efficient algorithms to achieve the maximal user utility. Opportunistic traffic offloading from licensed band to unlicensed bands is also investigated, based on the network formation game. By exploiting the characteristics of mobile social networks, the offloading performance can be further enhanced. This brief targets researchers and engineers from both academia and industry interested in the development of LTE over unlicensed bands, as well as the design and implementation of cross layer radio resource management. Students studying electrical engineering and computer science will also find this brief useful for their studies.