Admission Control And Radio Resource Allocation For Multicasting Over High Altitude Platforms
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Admission Control And Radio Resource Allocation For Multicasting Over High Altitude Platforms
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Author : Ahmed Ibrahim
language : en
Publisher:
Release Date : 2016
Admission Control And Radio Resource Allocation For Multicasting Over High Altitude Platforms written by Ahmed Ibrahim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
In this thesis, optimization techniques for a joint admission control and radio resource allocation are developed for multicasting over high altitude platforms. First, a primary system model in a multicellular high altitude platform system is considered, in which each user can receive any requested multicast session in its cell from no more than only one HAP antenna simultaneously. All the users have equal priority for admission. The users are selected to join the respective multicast groups and the power, subchannels and time slots are allocated such that the spectrum utilization is maximized while satisfying the quality of service requirements. Lagrangian relaxation and the subgradient algorithm are used to obtain solution bounds for the primary system model problem formulation. These bounds were then used in the branch and bound algorithm for pruning of nodes. The numerical results illustrate the goodness of the bounds for different constraint set dualizations and for different subgradient step size rules. The system model is then extended to allow the multicast group users to receive a session's transmission from more than one antenna simultaneously at different frequencies. This also allows the user to receive multicast sessions transmitted in neighboring cells too, not just those transmitted in the cell which the user resides in. The users have different priority levels of admission and the objective is to maximize the admission of highest priority users to the system. A much efficient formulation is obtained for the extended model in terms of size, as compared to the primary model. Linear outer approximation using McCormick underestimators are used for the relaxation of the mixed binary quadratically constrained problem. The solution method is based on branch and cut scheme in which cutting planes, domain propagation and heuristics are integrated. Various branching schemes are considered and a presolving reformulation linearization scheme for a specific set of quadratic constraints is considered. The numerical experiments compare the performances in terms of the duality gap, number of nodes, number of iterations, the number of iterations per node, the time needed to obtain the first feasible solution and the percentage of instances a feasible solution was found.
Optimization Methods For User Admissions And Radio Resource Allocation For Multicasting Over High Altitude Platforms
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Author : Ibrahim, Ahmed
language : en
Publisher: River Publishers
Release Date : 2019-02-27
Optimization Methods For User Admissions And Radio Resource Allocation For Multicasting Over High Altitude Platforms written by Ibrahim, Ahmed and has been published by River Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-27 with Technology & Engineering categories.
This book focuses on the issue of optimizing radio resource allocation (RRA) and user admission control (AC) for multiple multicasting sessions on a single high altitude platform (HAP) with multiple antennas on-board. HAPs are quasi-stationary aerial platforms that carry a wireless communications payload to provide wireless communications and broadband services. They are meant to be located in the stratosphere layer of the atmosphere at altitudes in the range 17-22 km and have the ability to fly on demand to temporarily or permanently serve regions with unavailable telecommunications infrastructure. An important requirement that the book focusses on is the development of an efficient and effective method for resource allocation and user admissions for HAPs, especially when it comes to multicasting. Power, frequency, space (antennas selection) and time (scheduling) are the resources considered in the problem over an orthogonal frequency division multiple access (OFDMA) HAP system. Due to the strong dependence of the total number of users that could join different multicast groups, on the possible ways we may allocate resources to these groups, it is of significant importance to consider a joint user to session assignments and RRA across the groups. From the service provider's point of view, it would be in its best interest to be able to admit as many higher priority users as possible, while satisfying their quality of service requirements. High priority users could be users subscribed in and paying higher for a service plan that gives them preference of admittance to receive more multicast transmissions, compared to those paying for a lower service plan. Also, the user who tries to join multiple multicast groups (i.e. receive more than one multicast transmission), would have preferences for which one he would favor to receive if resources are not enough to satisfy the QoS requirements. Technical topics discussed in the book include: Overview on High Altitude Platforms, their different types and the recent works in this areaRadio Resource Allocation and User Admission Control in HAPsMulticasting in a Single HAP System: System Model and Mathematical FormulationOptimization schemes that are designed to enhance the performance of a branch and bound technique by taking into account special mathematical structure in the problem formulation
Optimization Methods For User Admissions And Radio Resource Allocation For Multicasting Over High Altitude Platforms
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Author : Ahmed Ibrahim
language : en
Publisher: CRC Press
Release Date : 2022-09-01
Optimization Methods For User Admissions And Radio Resource Allocation For Multicasting Over High Altitude Platforms written by Ahmed Ibrahim and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-01 with Medical categories.
This book focuses on the issue of optimizing radio resource allocation (RRA) and user admission control (AC) for multiple multicasting sessions on a single high altitude platform (HAP) with multiple antennas on-board. HAPs are quasi-stationary aerial platforms that carry a wireless communications payload to provide wireless communications and broadband services. They are meant to be located in the stratosphere layer of the atmosphere at altitudes in the range 17-22 km and have the ability to fly on demand to temporarily or permanently serve regions with unavailable telecommunications infrastructure. An important requirement that the book focusses on is the development of an efficient and effective method for resource allocation and user admissions for HAPs, especially when it comes to multicasting. Power, frequency, space (antennas selection) and time (scheduling) are the resources considered in the problem over an orthogonal frequency division multiple access (OFDMA) HAP system.Due to the strong dependence of the total number of users that could join different multicast groups, on the possible ways we may allocate resources to these groups, it is of significant importance to consider a joint user to session assignments and RRA across the groups. From the service provider's point of view, it would be in its best interest to be able to admit as many higher priority users as possible, while satisfying their quality of service requirements. High priority users could be users subscribed in and paying higher for a service plan that gives them preference of admittance to receive more multicast transmissions, compared to those paying for a lower service plan. Also, the user who tries to join multiple multicast groups (i.e. receive more than one multicast transmission), would have preferences for which one he would favor to receive if resources are not enough to satisfy the QoS requirements.Technical topics discussed in the book include: • Overview on High Altitude Platforms, their different types and the recent works in this area Radio Resource Allocation and User Admission Control in HAPs Multicasting in a Single HAP System: System Model and Mathematical Formulation Optimization schemes that are designed to enhance the performance of a branch and bound technique by taking into account special mathematical structure in the problem formulation
Personal Satellite Services
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Author : Kandeepan Sithamparanathan
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-06-04
Personal Satellite Services written by Kandeepan Sithamparanathan and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-06-04 with Computers categories.
This book constitutes the thoroughly refereed post-conference proceedings of the Second International ICST Conference on Personal Satellite Services, PSATS 2010, held in Rome, Italy, Februray 2010. The conference included a keynote speech, 4 regular technical tracks and 4 special sessions consisting of 33 high-quality scientific papers. These cover various topics such as Satellite Communications: Coding and Modulations, Multimedia Integration, Satellite Network: Quality of Service and Architectures and Applications and Services, as well as Delay-Tolerant Networks, Quantum Satellite Communications, Access Quality Processing and Applications of Satellite Imagery.
Journal Of Communications And Networks
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Author :
language : en
Publisher:
Release Date : 2006
Journal Of Communications And Networks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Computer networks categories.
Conference Record
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Author :
language : en
Publisher:
Release Date : 2003
Conference Record written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Communications, Military categories.
Handbook Of Research On Heterogeneous Next Generation Networking Innovations And Platforms
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Author : Kotsopoulos, Stavros
language : en
Publisher: IGI Global
Release Date : 2008-10-31
Handbook Of Research On Heterogeneous Next Generation Networking Innovations And Platforms written by Kotsopoulos, Stavros and has been published by IGI Global this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-10-31 with Computers categories.
"This book presents state-of-the-art research, developments, and integration activities in combined platforms of heterogeneous wireless networks"--Provided by publisher.
Broadband Communications Via High Altitude Platforms
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Author : David Grace
language : en
Publisher: John Wiley & Sons
Release Date : 2011-06-20
Broadband Communications Via High Altitude Platforms written by David Grace and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-06-20 with Technology & Engineering categories.
A unique book with systematic and thorough coverage of HAP related issues, problems and solutions. Handbook of Broadband Communications from High Altitude Platforms provides a thorough overview and state of the art of the HAP enabling technologies, as well as describing recent research activities with most promising results. It outlines the roadmap for future development of HAPs. Focuses on placing HAPs in the perspective of current and future broadband wireless communication systems, providing the readers with an overview of the constraints affecting HAP-based broadband communications Provides a thorough overview of HAP enabling technologies, describes recent research activities with most promising results, and outlines the roadmap for future development of HAPs Covers enabling technologies and economics of HAP-based communication system including issues related to aeronautics, energetics, operating scenarios, applications and business modeling Examines the operating environment, advanced communication techniques for efficient radio link resource management, and suitable antennas Addresses multiplatform constellations, presenting the multiple HAP constellation planning procedure and discussing the networking implications of using multiple HAPs
Wireless Foresight
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Author : Bo Karlson
language : en
Publisher: John Wiley & Sons
Release Date : 2003-10-10
Wireless Foresight written by Bo Karlson and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-10-10 with Technology & Engineering categories.
Wireless Foresight deals with the development of the wireless communications industry and technology during the coming ten to fifteen years. Telecommunications is a global business of enormous proportions and is one of the largest industries in the world. Written in a highly accessible and simple to read manner, this book is based around four scenarios of the wireless world in 2015. The focus is on the industry (i.e. infrastructure and terminal vendors, operators, and service developers and providers) as well as on new players. Discusses the long-term developments described in the four scenarios and also short term issues, for example the challenges facing industry. Uncovers important areas for technological research and discusses the critical challenges facing industry, for example; the high cost for infrastructure, the slow spectrum release, the stampeding system complexity, radiation, battery capacity, and the threat of a disruptive market change facing the telecommunications industry. Offers a global approach whereby developments from around the world are described. Employs the method of building full-scale scenarios as opposed to just identifying trends and making predictions. Wireless Foresight is an invaluable and provocative read for top and middle management, strategists, business developers, technology managers, and entrepreneurs in the telecom, datacom and infocom industries alike. It is also of great interest to financial analysts and academics.
Personal Wireless Communications
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Author : Robert Bestak
language : en
Publisher: Springer
Release Date : 2007-11-14
Personal Wireless Communications written by Robert Bestak and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-11-14 with Technology & Engineering categories.
The international conference Personal Wireless Communications (PWC 2007) was the twelfth conference of its series aimed at stimulating technical exchange between researchers, practitioners and students interested in mobile computing and wireless networks. On behalf of the International Advisory Committee, it is our great pleasure to welcome you to the proceedings of the 2007 event. Wireless communication faces dramatic changes. The wireless networks are expanding rapidly in subscribers, capability, coverage, and applications, and costs continue to decrease. Mobile devices are becoming ubiquitous with greatly expanded computing power and memory, improved displays, and wireless lo cal and personal area connectivity. The PWC 2007 program covered a variety of research topics that are of current interest, starting with Ad~Hoc Networks, WiMAX, Heterogeneous Networks, Wireless Networking, QoS and Security, Sen sor Networks, Multicast and Signal processing. This year we enriched PWC with a poster session covering diversity topics related to wireless networks (e.g., fil ters, current conveyors, etc.). We would like to thank the International Advisory Committee members and the referees. Without their support, the program organization of this conference would not have been possible. We are also indebted to many individuals and organizations that made this conference possible (Czech Technical University, IFIP, ESTEC). In particular, we thank the members of the Organizing Commit tee for their help in all aspects of the organization of this conference.