Adaptive Resource Allocation to Enhance the Quality of Service in Wireless Networks PDF Download
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Author: Moncef Elaoud
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Author: Moncef Elaoud
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Author: Bing Cao
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages :
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Book Description
Wireless networks have become crucial to provide mobile users with untethered communication services. Future generation wireless network has naturally evolved as a heterogeneous one, in which different wireless technologies compliment others to provide diverse Quality of Service (QoS). On one side, societal dependence on wireless services demands the survivability as a built-in design initiative. On the other side, resource management strategies are vital to efficiently utilize limited radio resources. This dissertation contributes to research on the resource management for QoS based survivable wireless networks. The main objective is to design adaptive resource schemes that can improve wireless survivability while satisfying QoS requirements. First a multi-layer wireless survivability framework is developed to encompass new features of Third-Generation (3G) cellular systems. Within this framework, adaptive resource management algorithms are utilized as the primary strategy to achieve Radio Network Subsystem (RNS) survivability. New capacity models and capacity utilization models are designed to support the survivability analysis of algorithms for managing the heterogeneous wireless resources of 3G systems. The resource management algorithms developed include an adaptive admission control algorithm with channel switching, QoS and priority. The results show that these adaptive algorithms outperform prior schemes especially in overload situations. The RNS survivability design is further extended to the hybrid wireless context for which different design strategies are studied. A novel utility based adaptive resource management scheme is proposed for the hybrid wireless networks to meet both survivability and QoS expectations. This is shown to achieve effective load balancing and failure tolerance in high traffic overload.
Author: Behdis Eslamnour
Publisher:
ISBN:
Category : Ad hoc networks (Computer networks)
Languages : en
Pages : 374
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"Widespread use of resource constrained wireless ad hoc networks requires careful management of the network resources in order to maximize the utilization. In cognitive wireless networks, resources such as spectrum, energy, communication links/paths, time, space, modulation scheme, have to be managed to maintain quality of service (QoS). Therefore in the first paper, a distributed dynamic channel allocation scheme is proposed for multi-channel wireless ad hoc networks with single-radio nodes. The proposed learning scheme adapts the probabilities of selecting each channel as a function of the error in the performance index at each step. Due to frequent changes in topology and flow traffic over time, wireless ad hoc networks require a dynamic routing protocol that adapts to the changes of the network while allocating network resources. In the second paper, approximate dynamic programming (ADP) techniques are utilized to find dynamic routes, while solving discrete-time Hamilton-Jacobi-Bellman (HJB) equation forward-in-time for route cost. The third paper extends the dynamic routing to multi-channel multi-interface networks which are affected by channel uncertainties and fading channels. By the addition of optimization techniques through load balancing over multiple paths and multiple wireless channels, utilization of wireless channels throughout the network is enhanced. Next in the fourth paper, a decentralized game theoretic approach for resource allocation of the primary and secondary users in a cognitive radio networks is proposed. The priorities of the networks are incorporated in the utility and potential functions which are in turn used for resource allocation. The proposed game can be extended to a game among multiple co-existing networks, each with different priority levels"--Abstract, leaf iv.
Author: Danda B. Rawat
Publisher: Springer
ISBN: 3319152998
Category : Computers
Languages : en
Pages : 83
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Book Description
This SpringerBrief presents adaptive resource allocation schemes for secondary users for dynamic spectrum access (DSA) in cognitive radio networks (CRNs) by considering Quality-of-Service requirements, admission control, power/rate control, interference constraints, and the impact of spectrum sensing or primary user interruptions. It presents the challenges, motivations, and applications of the different schemes. The authors discuss cloud-assisted geolocation-aware adaptive resource allocation in CRNs by outsourcing computationally intensive processing to the cloud. Game theoretic approaches are presented to solve resource allocation problems in CRNs. Numerical results are presented to evaluate the performance of the proposed methods. Adaptive Resource Allocation in Cognitive Radio Networks is designed for professionals and researchers working in the area of wireless networks. Advanced-level students in electrical engineering and computer science, especially those focused on wireless networks, will find this information helpful.
Author: Slawomir Stanczak
Publisher: Springer Science & Business Media
ISBN: 3540793860
Category : Technology & Engineering
Languages : en
Pages : 445
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Book Description
The purpose of this book is to provide tools for a better understanding of the fundamental tradeo?s and interdependencies in wireless networks, with the goal of designing resource allocation strategies that exploit these int- dependencies to achieve signi?cant performance gains. Two facts prompted us to write it: First, future wireless applications will require a fundamental understanding of the design principles and control mechanisms in wireless networks. Second, the complexity of the network problems simply precludes the use of engineering common sense alone to identify good solutions, and so mathematics becomes the key avenue to cope with central technical problems in the design of wireless networks. In this book, two ?elds of mathematics play a central role: Perron-Frobenius theory for non-negative matrices and optimization theory. This book is a revised and expanded version of the research monograph “Resource Allocation in Wireless Networks” that was published as Lecture Notes in Computer Sciences (LNCS 4000) in 2006. Although the general structure has remained unchanged to a large extent, the book contains - merous additional results and more detailed discussion. For instance, there is a more extensive treatment of general nonnegative matrices and interf- ence functions that are described by an axiomatic model. Additional material on max-min fairness, proportional fairness, utility-based power control with QoS (quality of service) support and stochastic power control has been added.
Author: Amila Tharaperiya Gamage
Publisher: Springer
ISBN: 3319642685
Category : Technology & Engineering
Languages : en
Pages : 116
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Book Description
This book provides an in-depth discussion on how to efficiently manage resources of heterogeneous wireless networks and how to design resource allocation algorithms to suit real world conditions. Efficiently managing resources of the networks is more crucial now, than ever before, to meet users’ rapidly increasing demand for higher data rates, better quality-of-service (QoS) and seamless coverage. Some of the techniques that can be incorporated within heterogeneous wireless networks to achieve this objective are interworking of the networks, user multi-homing and device-to-device (D2D) communication. Designing resource allocation algorithms to suit real world conditions is also important, as the algorithms should be deployable and perform well in real networks. For example, two of the conditions considered in this book are resource allocation intervals of different networks are different and small cell base stations have limited computational capacity. To address the first condition, resource allocation algorithms for interworking systems are designed to allocate resources of different networks at different time-scales. To address the second condition, resource allocation algorithms are designed to be able to run at cloud computing servers. More of such conditions, algorithms designed to suit these conditions, modeling techniques for various networks and performance analysis of the algorithms are discussed in the book. This book concludes with a discussion on the future research directions on the related fields of study. Advanced-level students focused on communication and networking will use this book as a study guide. Researchers and experts in the fields of networking, converged networks, small-cell networks, resource management, and interference management, as well as consultants working in network planning and optimization and managers, executives and network architects working in the networking industry will also find this book useful as a reference.
Author: Huan Chen
Publisher: Springer Science & Business Media
ISBN: 1461504694
Category : Computers
Languages : en
Pages : 267
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Book Description
Due to the great success and enormous impact of IP networks, In ternet access (such as sending and receiving e-mails) and web brows ing have become the ruling paradigm for next generation wireless systems. On the other hand, great technological and commercial success of services and applications is being witnessed in mobile wire less communications with examples of cellular, pes voice telephony and wireless LANs. The service paradigm has thus shifted from the conventional voice service to seamlessly integrated high quality mul timedia transmission over broadband wireless mobile networks. The multimedia content may include data, voice, audio, image, video and so on. With availability of more powerful portable devices, such as PDA, portable computer and cellular phone, coupled with the easier access to the core network (using a mobile device), the number of mobile users and the demand for multimedia-based applications is increasing rapidly. As a result, there is an urgent need for a sys tem that supports heterogeneous multimedia services and provides seamless access to the desired resources via wireless connections. Therefore, the convergence of multimedia communication and wireless mobile networking technologies into the next generation wireless multimedia (WMM) networks with the vision of "anytime, anywhere, anyform" information system is the certain trend in the foreseeable future. However, successful combination of these two technologies presents many challenges such as available spectral bandwidth, energy efficiency, seamless end-to-end communication, robustness, security, etc.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
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As a wide variety of services are being made available for users in a wireless and mobile network, the type of traffic is not limited to voice anymore, rather applications such as web browsing, email, video messaging, etc., which generate non-voice traffic, are also gaining increasing popularity. With the growth of these bandwidth hungry multimedia services, there is an immediate need for a resource management scheme which exploits the flexible bandwidth requirements of these new traffic classes. In this thesis, we present and analyze a novel resource management scheme, namely Dynamic Adaptive Resource Allocation (DARA), which is specially tailored to support the emerging classes of multimedia traffic in a wireless and mobile network. From the extensive simulation results, it is evident that our scheme achieves better performance with regard to traditional Quality of Service (QoS) parameters such as the call blocking probabilities of originating and handoff calls while significantly reducing the bandwidth reallocation frequency experienced by a call when compared to similar flexible resource allocation schemes. Higher priority handoff calls are also efficiently handled in our proposed scheme by a combined approach of channel reservation and bandwidth borrowing from ongoing calls at heavy traffic loads.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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HKUST Call Number: Thesis ELEC 2004 Zhang.
Author: Junting Zhou
Publisher:
ISBN:
Category :
Languages : en
Pages : 434
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