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Adaptive Code Division Multiple Access Protocol For Wireless Network On Chip Architectures
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Book Synopsis Adaptive Code Division Multiple Access Protocol for Wireless Network-on-chip Architectures by : Vineeth Vijayakumaran
Download or read book Adaptive Code Division Multiple Access Protocol for Wireless Network-on-chip Architectures written by Vineeth Vijayakumaran and published by . This book was released on 2012 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Massive levels of integration following Moore's Law ushered in a paradigm shift in the way on-chip interconnections were designed. With higher and higher number of cores on the same die traditional bus based interconnections are no longer a scalable communication infrastructure. On-chip networks were proposed enabled a scalable plug-and-play mechanism for interconnecting hundreds of cores on the same chip. Wired interconnects between the cores in a traditional Network-on-Chip (NoC) system, becomes a bottleneck with increase in the number of cores thereby increasing the latency and energy to transmit signals over them. Hence, there has been many alternative emerging interconnect technologies proposed, namely, 3D, photonic and multi-band RF interconnects. Although they provide better connectivity, higher speed and higher bandwidth compared to wired interconnects; they also face challenges with heat dissipation and manufacturing difficulties. On-chip wireless interconnects is one other alternative proposed which doesn't need physical interconnection layout as data travels over the wireless medium. They are integrated into a hybrid NOC architecture consisting of both wired and wireless links, which provides higher bandwidth, lower latency, lesser area overhead and reduced energy dissipation in communication. However, as the bandwidth of the wireless channels is limited, an efficient media access control (MAC) scheme is required to enhance the utilization of the available bandwidth. This thesis proposes using a multiple access mechanism such as Code Division Multiple Access (CDMA) to enable multiple transmitter-receiver pairs to send data over the wireless channel simultaneously. It will be shown that such a hybrid wireless NoC with an efficient CDMA based MAC protocol can significantly increase the performance of the system while lowering the energy dissipation in data transfer. In this work it is shown that the wireless NoC with the proposed CDMA based MAC protocol outperformed the wired counterparts and several other wireless architectures proposed in literature in terms of bandwidth and packet energy dissipation. Significant gains were observed in packet energy dissipation and bandwidth even with scaling the system to higher number of cores. Non-uniform traffic simulations showed that the proposed CDMA-WiNoC was consistent in bandwidth across all traffic patterns. It is also shown that the CDMA based MAC scheme does not introduce additional reliability concerns in data transfer over the on-chip wireless interconnects."--Abstract.
Book Synopsis Multiple Access Protocols by : Raphael Rom
Download or read book Multiple Access Protocols written by Raphael Rom and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer communication networks have come of age. Today, there is hardly any professional, particularly in engineering, that has not been the user of such a network. This proliferation requires the thorough understanding of the behavior of networks by those who are responsible for their operation as well as by those whose task it is to design such networks. This is probably the reason for the large number of books, monographs, and articles treating relevant issues, problems, and solutions in this field. Among all computer network architectures, those based on broadcast mul tiple access channels stand out in their uniqueness. These networks appear naturally in environments requiring user mobility where the use of any fixed wiring is impossible and a wireless channel is the only available option. Because of their desirable characteristics multiple access networks are now used even in environments where a wired point-to-point network could have been installed. The understanding of the operation of multiple access network through their performance analysis is the focus of this book.
Book Synopsis Medium Access Control and Adaptive Transmission Techniques in Wireless Networks by :
Download or read book Medium Access Control and Adaptive Transmission Techniques in Wireless Networks written by and published by . This book was released on 2005 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Efficient utilization of the limited wireless spectrum while satisfying applications' quality of service requirements is an essential design goal of forthcoming wireless networks and a key to their successful deployment. The need for spectrally efficient systems has motivated the development of adaptive transmission techniques. Enabling this adaptation requires protocols for information exchange as well as mathematical tools to optimize the controllable parameters. In this dissertation, we provide insights into such protocols and mathematical tools that target efficient utilization of the wireless spectrum. First, we propose a distributed CDMA-based medium access protocol for mobile ad hoc networks (MANETs). Our approach accounts for multiple access interference at the protocol level, thereby addressing the notorious near-far problem that undermines the throughput performance in MANETs. Second, we present a novel power-controlled MAC protocol, called POWMAC, which enjoys the same single-channel, single-transceiver design of the IEEE 802.11 Ad Hoc MAC protocol, but which achieves a significant throughput improvement over the 802.11 protocol. Third, we consider joint power/rate optimization in the context of orthogonal modulation (OM) and investigate the performance gains achieved through adaptation of the OM order using recently developed optimization techniques. We show that such adaptation can significantly increase network throughput while simultaneously reducing the per-bit energy consumption relative to fixed-order modulation systems. Finally, we determine the maximum achievable p̀̀erformance" of a wireless CDMA network that employs a conventional matched filter receiver and that operates under \emph{optimal} link-layer adaptation where each user individually achieves the Shannon capacity. The derived bounds serve as benchmarks against which adaptive CDMA systems can be compared.
Book Synopsis Power and Code Management in Wireless Networks by : Ming Liu
Download or read book Power and Code Management in Wireless Networks written by Ming Liu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Among different wireless technologies, wireless ad hoc networks and cellular networks account for a large part of wireless communications. In this work, we take an extensive study at the management of the two of very important resources in both wireless ad hoc networks and cellular networks: power and code (bandwidth). In the first part, we focus on the power management in IEEE 802.11 ad hoc networks. We first aim at the mismatch between the power management protocol and the ever-increasing transfer rate. We propose modifications on the power management operations of IEEE 802.11 which introduce very little overhead but bring a big boost on the performance in both power efficiency and data throughput by combining a scheduling algorithm with the power management. Then, we concentrate on the new challenges faced by the power and synchronization protocols when pushing the IEEE 802.11 ad hoc mode into the multi-hop environment. We study the relationship between clock synchronization and power management in Mobile Multi-hop Ad Hoc Network (MANET). After reaching the conclusion that clock synchronization is vital for not only efficient power management, but many other network operations as well, we present a protocol to generate a globally synchronous system from synchronized sub-networks. We discuss the correctness of the protocol, and show the power efficiency brought by such a synchronous system in simulations. Lastly, we present a framework, which takes advantage both of the two main approaches in energy conservation, i.e. power management and power control, to maximize power-saving. Because the goals that each scheme seeks contradict each other, we study the balance and the trade-off between them, and use them as the guideline on building our framework. In the second part of this work, we shift to the code (bandwidth) assignment for multimedia traffic in Code Division Multiple Access (CDMA) networks. We propose several algorithms to handle the jitters of compressed video transmissions, and try to get a better playback quality while reducing the effects which video traffic has on other users in the system. Our simulations show the improved performance from those algorithms, especially at heavy traffic scenarios.
Book Synopsis IEE Proceedings by : Institution of Electrical Engineers
Download or read book IEE Proceedings written by Institution of Electrical Engineers and published by . This book was released on 1999 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indexes IEE proceedings parts A through I
Book Synopsis Wireless Networking Technology by : Steve A. Rackley
Download or read book Wireless Networking Technology written by Steve A. Rackley and published by Elsevier. This book was released on 2011-02-23 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the demand for higher bandwidth has lead to the development of increasingly complex wireless technologies, an understanding of both wireless networking technologies and radio frequency (RF) principles is essential for implementing high performance and cost effective wireless networks.Wireless Networking Technology clearly explains the latest wireless technologies, covering all scales of wireless networking from personal (PAN) through local area (LAN) to metropolitan (MAN). Building on a comprehensive review of the underlying technologies, this practical guide contains ‘how to’ implementation information, including a case study that looks at the specific requirements for a voice over wireless LAN application. This invaluable resource will give engineers and managers all the necessary knowledge to design, implement and operate high performance wireless networks. · Explore in detail wireless networking technologies and understand the concepts behind RF propagation.· Gain the knowledge and skills required to install, use and troubleshoot wireless networks.· Learn how to address the problems involved in implementing a wireless network, including the impact of signal propagation on operating range, equipment inter-operability problems and many more.· Maximise the efficiency and security of your wireless network.
Book Synopsis Fundamentals of Wireless Communication by : David Tse
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.
Book Synopsis System Level Design of Reconfigurable Systems-on-Chip by : Nikolaos Voros
Download or read book System Level Design of Reconfigurable Systems-on-Chip written by Nikolaos Voros and published by Springer Science & Business Media. This book was released on 2006-02-23 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes in a consolidated way the results of a three-year research project, during which researchers from leading european industrial companies and research institutes have been working together. Contributors come from academia and industry, such companies as INTRACOM, VTT and Nokia being represented Proposes brand new approaches based on SystemC and OCAPI-XL that explicitly handle issues related to reconfiguration at the system level Introduces a design flow for designing reconfigurable systems-on-chip Provides a comprehensive introduction to reconfigurable hardware and existing reconfigurable technologies Presents examples on how reconfigurable hardware can be exploited for the development of complex systems Provides useful feedback from the application of the proposed design flow and system level design methods on different real life design cases
Book Synopsis Massive Multiple Access in Future Wireless Networks by : Yasser Al-Eryani
Download or read book Massive Multiple Access in Future Wireless Networks written by Yasser Al-Eryani and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last few decades, wireless communication technologies and services have radically changed the way we live and interact at the personal, social, local and global levels. Such changes were mainly driven by the continuous emergence of innovative wireless communication services and products. These services and products represents a direct upshot of enduring research outcomes within the area. Nevertheless, the blessing of such innovation was accompanied by extremely high demands in forms of data traffic, per-user transmission rate, minimum transmission delay and in the number of wireless devices per unit area. Tackling these issues through cellular network densification was faced by many technical issues related to high interference levels, tedious user scheduling processes, and complicated network resource allocation algorithms. Trying to address these imperative technical issues in future wireless networks, this thesis develops several innovative enabling techniques for massive wireless multiple access. Specifically, we commence this work by introducing a new concept of partial spectrum overlapping among active users equipment (UEs). The proposed scheme represents a trade-off between fully orthogonal multiple access schemes (e.g. time division multiple access [TDMA], frequency division multiple access (FDMA) and orthogonal frequency division multiple access (OFDMA)) and that of non-orthogonal multiple access (NOMA). Second, we develop several innovative dynamic cell-free network architectures that support massive wireless connectivity through adaptive access points (APs)/base stations (BSs) coordination and/or cooperation. The proposed network models are then evaluated under different state-of-the-art enabling wireless techniques such as millimeter wave (mmWave) channel links and massive multiple-input multiple-output (mMIMO) systems. Furthermore, the performance of the proposed architectures is investigated through the derivation of several closed-form expressions of exact and/or asymptotic performance metrics (example, probability of outage, asymptotic outage, instantaneous rate and outage-capacity). Finally, for practical control and monitoring of the proposed access techniques and network models, we develop several low-complexity deep reinforcement learning (DRL)-based modeling frameworks that can efficiently learn the solution of several combinatorial optimization problems related to network partitioning (clustering) and uplink/downlink beamforming. This is achieved through innovative nested DRL designs that utilizes continuous and discrete deep neural networks (DNN) agents based on the nature of the problem. Several operating scenarios of the proposed techniques are evaluated through extensive Monte-Carlo simulations (Matlab and Python) with practical parameters and assumptions.
Book Synopsis The Evolution of Untethered Communications by : National Research Council
Download or read book The Evolution of Untethered Communications written by National Research Council and published by National Academies Press. This book was released on 1998-01-01 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to a request from the Defense Advanced Research Projects Agency, the committee studied a range of issues to help identify what strategies the Department of Defense might follow to meet its need for flexible, rapidly deployable communications systems. Taking into account the military's particular requirements for security, interoperability, and other capabilities as well as the extent to which commercial technology development can be expected to support these and related needs, the book recommends systems and component research as well as organizational changes to help the DOD field state-of-the-art, cost-effective untethered communications systems. In addition to advising DARPA on where its investment in information technology for mobile wireless communications systems can have the greatest impact, the book explores the evolution of wireless technology, the often fruitful synergy between commercial and military research and development efforts, and the technical challenges still to be overcome in making the dream of "anytime, anywhere" communications a reality.
Download or read book Science Abstracts written by and published by . This book was released on 1995 with total page 1360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adaptive Resource Allocation for Wireless Code Division Multiple Access by : Farhad Zarringhalam
Download or read book Adaptive Resource Allocation for Wireless Code Division Multiple Access written by Farhad Zarringhalam and published by . This book was released on 2007 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical & Electronics Abstracts by :
Download or read book Electrical & Electronics Abstracts written by and published by . This book was released on 1997 with total page 1948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Code division multiple access wireless network planning considering clustered spatial customer traffic by : Phuoc Tran-Gia
Download or read book Code division multiple access wireless network planning considering clustered spatial customer traffic written by Phuoc Tran-Gia and published by . This book was released on 1998 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of Research of the National Institute of Standards and Technology by :
Download or read book Journal of Research of the National Institute of Standards and Technology written by and published by . This book was released on 1997 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports NIST research and development in the physical and engineering sciences in which the Institute is active. These include physics, chemistry, engineering, mathematics, and computer sciences. Emphasis on measurement methodology and the basic technology underlying standardization.
Book Synopsis Advances in 3G Enhanced Technologies for Wireless Communications by : Jiangzhou Wang
Download or read book Advances in 3G Enhanced Technologies for Wireless Communications written by Jiangzhou Wang and published by Artech House. This book was released on 2002 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of the cutting edge work of leading researchers and engineers from major telecommunications firms worldwide, this timely volume describes various technical regimes for implementing third generation wireless mobile communications systems, and covers the latest enhanced techniques.
Book Synopsis Communication Systems for the Mobile Information Society by : Martin Sauter
Download or read book Communication Systems for the Mobile Information Society written by Martin Sauter and published by John Wiley & Sons. This book was released on 2006-07-11 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many wireless systems like GSM, GPRS, UMTS, Bluetooth, WLAN or WiMAX offer possibilities to keep people connected while on the move. In this flood of technology and claims that one single resource will serve all our needs, this book seeks to enable readers to examine and understand each technology, and how to utilise several different systems for the best results. Communication Systems for the Mobile Information Society not only contains a technical description of the different wireless systems available today, but also explains the thoughts that are behind the different mechanisms and implementations; not only the 'how' but also the 'why' is in focus. Thus the advantages and also limitations of each technology become apparent. Provides readers with a solid introduction to major global wireless standards and compares the different wireless technologies and their applications Describes the different systems based on the standards, their practical implementation and the design assumptions that were made The performance and capacity of each system in practice is analyzed and explained, accompanied with practical tips on how to discover the functionality of different networks by the readers themselves Questions at the end of each chapter and answers on the accompanying website make this book ideal for self study or as course material Illustrated with many realistic examples of how mobile people can stay in touch with other people, the Internet and their corporate intranet This book is an essential resource for telecommunication engineers, professionals and computer science and electrical engineering students who want to get a thorough end-to-end understanding of the different technical concepts of the systems on the market today.
