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Metropolitan Networks
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Book Synopsis Metropolitan networks by : Jordi Julià Sort
Download or read book Metropolitan networks written by Jordi Julià Sort and published by Editorial Gustavo Gili, S.A.. This book was released on 2006 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a study of mass transit networks in urban areas and of their role in shaping the structure of the city. It establishes links between the history, planning and transport networks of eleven international cities (London, New York, Paris, Berlin, Tokyo, Los Angeles, Madrid, Barcelona, Milan, Mexico City and Singapore), in a survey which helps us bring to mind the origins of modern means of transport: of conventional railways and their subsequent conversion into metros and tramways, and into today's high-speed trains; of the appearance in the metropolitan context of the motor car and bus, and the arrival of motorways and contemporary airports. In short, the history and morphology of transport networks in our big cities, described through the detailed study and comparative analysis of developments in each of them, all of this with a wealth of images, maps and data of interest.
Book Synopsis MPLS for Metropolitan Area Networks by : Nam-Kee Tan
Download or read book MPLS for Metropolitan Area Networks written by Nam-Kee Tan and published by CRC Press. This book was released on 2004-11-15 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: MPLS for Metropolitan Area Networks demonstrates solutions provided by MPLS features. The text opens with an overview of metro networks and MPLS. It examines traffic engineering issues, focusing on fundamental TE concepts and network control. The author then discusses how MPLS can bring increased reliability to Metropolitan Area Networks (MANs), and concludes with a detailed analysis of the service aspects of MANs. Topics reviewed include L3 and L2 MPLS VPNs, geographically dispersed Ethernet multipoint services, virtual private LAN services (VPLS), and the integrated services (IntServ) and differentiated services (DiffServ) QoS models with respect to MPLS.
Book Synopsis Broadband Access, WDM Metro and Network Management by : D. W. Faulkner
Download or read book Broadband Access, WDM Metro and Network Management written by D. W. Faulkner and published by IOS Press. This book was released on 2000 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 2 Broadband Access, WDM Metro and Network Management shows how new optical technologies and architectures can improve the performance of broadband access and WDM metropolitan networks. WDM passive optical networks and WDM rings feature strongly in this volume. A paper from a group of key vendors in Germany will describe a DWDM metro ring network with up to 800 Gb/s using novel add-drop multiplexers.
Book Synopsis Core and Metro Networks by : Alexandros Stavdas
Download or read book Core and Metro Networks written by Alexandros Stavdas and published by John Wiley & Sons. This book was released on 2010-01-06 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Find out everything you need to know about how current networks will have to evolve to provide for future broadband services In this book, the authors provide an overview of the status, challenges, architectures, and technological solutions for core and metropolitan networks. Furthermore, the book describes the current state of core and metropolitan telecommunication networks, as well as the drivers and motives behind the current paradigm shift in the telecommunications industry. Moreover, the authors elaborate system design guidelines for both point-to-point and multi-hop optical networks taking into consideration the analogue nature of the transmission channel. Key Features: Provides coverage of all aspects of core and metro networks supporting future broadband services, and a detailed description of the state-of-the-art Presents a clear path for migrating from point-to-point to data-centric, dynamic, multi-hop optical networks Shows how current systems will need to evolve over the coming years, summarizing challenges and issues to be investigated in future research Covers a wide range of topics from network architectures, to control plane, to key optical and optoelectronic devices, and best practice in transmission and system design Provides results, best practices and guidelines for various technical problems, including numerous hands-on examples Written by authors from cutting-edge companies such as Alcatel-Lucent, Siemens, Lucent, France Telecom, BT, and Telefonica Optical Core and Metro Networks will be of interest to researchers in industry and academia, and advanced (final year undergraduate) and postgraduate students undertaking communications, networking and optics courses.
Book Synopsis Long-haul and Access Networks, Optical Metro, and WDM by : A. Lord
Download or read book Long-haul and Access Networks, Optical Metro, and WDM written by A. Lord and published by IOS Press. This book was released on 2001 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the NOC 2001 at Adastral park, UK, June 26-29 2001. With about 70 papers, this book highlights the gigabit ethernet PON developments, and other work on standard broadband PONs such as, dynamic bandwith assignment. There are 10 papers on optical packet switiching and work on optical cross-connects and DWDM for long-haul systems is presented.
Download or read book IP over WDM written by Sudhir Dixit and published by John Wiley & Sons. This book was released on 2004-07-26 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: The key technology to delivering maximum bandwidth over networks is Dense Wave-length Division Multiplexing (DWDM) Describes in detail how DWDM works and how to implement a range of transmission protocols Covers device considerations, the pros and cons of various network layer protocols, and quality of service (QoS) issues The authors are leading experts in this field and provide real-world implementation examples First book to describe the interplay between the physical and IP (Internet Protocol) layers in optical networks
Book Synopsis The European Metropolises and Their Regions: From Economic Landscapes to Metropolitan Networks by :
Download or read book The European Metropolises and Their Regions: From Economic Landscapes to Metropolitan Networks written by and published by EUROREG. This book was released on with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Networks and WDM Newsletter by :
Download or read book Optical Networks and WDM Newsletter written by and published by Information Gatekeepers Inc. This book was released on with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wireless Communications and Networks by : Ali Eksim
Download or read book Wireless Communications and Networks written by Ali Eksim and published by BoD – Books on Demand. This book was released on 2012-03-14 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will provide a comprehensive technical guide covering fundamentals, recent advances and open issues in wireless communications and networks to the readers. The objective of the book is to serve as a valuable reference for students, educators, scientists, faculty members, researchers, engineers and research strategists in these rapidly evolving fields and to encourage them to actively explore these broad, exciting and rapidly evolving research areas.
Download or read book Network World written by and published by . This book was released on 2002-01-21 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 20 years, Network World has been the premier provider of information, intelligence and insight for network and IT executives responsible for the digital nervous systems of large organizations. Readers are responsible for designing, implementing and managing the voice, data and video systems their companies use to support everything from business critical applications to employee collaboration and electronic commerce.
Book Synopsis Orthogonal Frequency-division Multiplexing for Optical Communications by : Daniel Jose Fernandes Barros
Download or read book Orthogonal Frequency-division Multiplexing for Optical Communications written by Daniel Jose Fernandes Barros and published by Stanford University. This book was released on 2011 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The drive towards higher spectral efficiency and maximum power efficiency in optical systems has generated renewed interest in the optimization of optical transceivers. In this work, we study the different optical applications: Wide Area Networks (WANs), Metropolitan Area Networks (MANs), Local Area Networks (LANs) and Personal Area Networks (PANs). In WANs or long-haul systems, orthogonal frequency-division multiplexing (OFDM) can compensate for linear distortions, such as group-velocity dispersion (GVD) and polarization-mode dispersion (PMD), provided the cyclic prefix is sufficiently long. Typically, GVD is dominant, as it requires a longer cyclic prefix. Assuming coherent detection, we show how to analytically compute the minimum number of subcarriers and cyclic prefix length required to achieve a specified power penalty, trading off power penalties from the cyclic prefix and from residual inter-symbol interference (ISI) and inter-carrier interference (ICI). We derive an analytical expression for the power penalty from residual ISI and ICI. We also show that when nonlinear effects are present in the fiber, single-carrier with digital equalization outperforms OFDM for various dispersion maps. We also study the impairments of electrical to optical conversion when using Mach-Zehnder (MZ) modulators. OFDM has a high peak-to-average ratio (PAR), which can result in low optical power efficiency when modulated through a Mach-Zehnder (MZ) modulator. In addition, the nonlinear characteristic of the MZ can cause significant distortion on the OFDM signal, leading to in-band intermodulation products between subcarriers. We show that a quadrature MZ with digital pre-distortion and hard clipping is able to overcome the previous impairments. We consider quantization noise and compute the minimum number of bits required in the digital-to-analog converter (D/A). Finally, we discuss a dual-drive MZ as a simpler alternative for the OFDM modulator, but our results show that it requires a higher oversampling ratio to achieve the same performance as the quadrature MZ. In MANs, we discuss the use OFDM for combating GVD effects in amplified direct-detection (DD) systems using single-mode fiber. We review known direct-detection OFDM techniques, including asymmetrically clipped optical OFDM (ACO-OFDM), DC-clipped OFDM (DC-OFDM) and single-sideband OFDM (SSB-OFDM), and derive a linearized channel model for each technique. We present an iterative procedure to achieve optimum power allocation for each OFDM technique, since there is no closed-form solution for amplified DD systems. For each technique, we minimize the optical power required to transmit at a given bit rate and normalized GVD by iteratively adjusting the bias and optimizing the power allocation among the subcarriers. We verify that SSB-OFDM has the best optical power efficiency among the different OFDM techniques. We compare these OFDM techniques to on-off keying (OOK) with maximum-likelihood sequence detection (MLSD) and show that SSB-OFDM can achieve the same optical power efficiency as OOK with MLSD, but at the cost of requiring twice the electrical bandwidth and also a complex quadrature modulator. We compare the computational complexity of the different techniques and show that SSB-OFDM requires fewer operations per bit than OOK with MLSD. In LANs, we compare the performance of several OFDM schemes to that of OOK in combating modal dispersion in multimode fiber links. We review known OFDM techniques using intensity modulation with direct detection (IM/DD), including DC-OFDM, ACO-OFDM and pulse-amplitude modulated discrete multitone (PAM-DMT). We describe an iterative procedure to achieve optimal power allocation for DC-OFDM, and compare analytically the performance of ACO-OFDM and PAM-DMT. We also consider unipolar M-ary pulse-amplitude modulation (M-PAM) with minimum mean-square error decision-feedback equalization (MMSE-DFE). For each technique, we quantify the optical power required to transmit at a given bit rate in a variety of multimode fibers. For a given symbol rate, we find that unipolar M-PAM with MMSE-DFE has a better power performance than all OFDM formats. Furthermore, we observe that the difference in performance between M-PAM and OFDM increases as the spectral efficiency increases. We also find that at a spectral efficiency of 1 bit/symbol, OOK performs better than ACO-OFDM using a symbol rate twice that of OOK. At higher spectral efficiencies, M-PAM performs only slightly better than ACO-OFDM using twice the symbol rate, but requires less electrical bandwidth and can employ analog-to-digital converters at a speed only 81% of that required for ACO-OFDM. In PANs, we evaluate the performance of the three IM/DD OFDM schemes in combating multipath distortion in indoor optical wireless links, comparing them to unipolar M-PAM with MMSE-DFE. For each modulation method, we quantify the received electrical SNR required at a given bit rate on a given channel, considering an ensemble of 170 indoor wireless channels. When using the same symbol rate for all modulation methods, M-PAM with MMSE-DFE has better performance than any OFDM format over a range of spectral efficiencies, with the advantage of M-PAM increasing at high spectral efficiency. ACO-OFDM and PAM-DMT have practically identical performance at any spectral efficiency. They are the best OFDM formats at low spectral efficiency, whereas DC-OFDM is best at high spectral efficiency. When ACO-OFDM or PAM-DMT are allowed to use twice the symbol rate of M-PAM, these OFDM formats have better performance than M-PAM. When channel state information is unavailable at the transmitter, however, M-PAM significantly outperforms all OFDM formats. When using the same symbol rate for all modulation methods, M-PAM requires approximately three times more computational complexity per processor than all OFDM formats and 63% faster analog-to-digital converters, assuming oversampling ratios of 1.23 and 2 for ACO-OFDM and M-PAM, respectively. When OFDM uses twice the symbol rate of M-PAM, OFDM requires 23% faster analog-to-digital converters than M-PAM but OFDM requires approximately 40% less computational complexity than M-PAM per processor.
Download or read book Network World written by and published by . This book was released on 1990-01-22 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 20 years, Network World has been the premier provider of information, intelligence and insight for network and IT executives responsible for the digital nervous systems of large organizations. Readers are responsible for designing, implementing and managing the voice, data and video systems their companies use to support everything from business critical applications to employee collaboration and electronic commerce.
Book Synopsis QoS-based Wavelength Routing in Multi-Service WDM Networks by : Admela Jukan
Download or read book QoS-based Wavelength Routing in Multi-Service WDM Networks written by Admela Jukan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on methods for service-differentiated and constraint-based wavelength routing and resource allocation for multi-service WDM networks. A number of unique routing solutions are proposed, and an extensive analysis of dynamically re-configurable multi-service WDM networks impart the major contribution to the current efforts in standardisation and network operation.
Book Synopsis Emerging Optical Network Technologies by : Krishna M. Sivalingam
Download or read book Emerging Optical Network Technologies written by Krishna M. Sivalingam and published by Springer. This book was released on 2006-01-16 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical networks have moved from laboratory settings and theoretical research to real-world deployment and service-oriented explorations. New technologies such as Ethernet PON, traffic grooming, regional and metropolitan network architectures and optical packet switching are being explored, and the landscape is continuously and rapidly evolving. Some of the important issues involving these new technologies involve the architectural, protocol, and performance related issues. This book addresses many of these issues and presents a birds eye view of some of the more promising technologies. Researchers and those pursuing advanced degrees in this field will be able to see where progress is being made and new technologies are emerging. Emerging Optical Network Technologies: Architectures, Protocols and Performance provides state-of-the-art material written by the most prominent professionals in their respective areas.
Download or read book WDM/optical Networks written by and published by Information Gatekeepers Inc. This book was released on with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Emerging Optical Network by : International Engineering Consortium
Download or read book The Emerging Optical Network written by International Engineering Consortium and published by Intl. Engineering Consortiu. This book was released on 2000-12 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to help readers understand the very latest optical developments, technologies, architectures, and market trends driving the next-generation network, this comprehensive report of all-optical networks (AON) is a critical resource for any communications company that hopes to tackle today's optical networking challenge. The future of the AON remains uncertain, but the next-generation optical network promises to provide the bandwidth flexibility, reliability, and network-management functions required to enable end-to-end wavelength services.
Book Synopsis European Optical Communications and Networks by :
Download or read book European Optical Communications and Networks written by and published by Information Gatekeepers Inc. This book was released on 1994 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
