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"This book is a collection of the latest contributions to the area of survivability in optical networks, focusing on theoretical and practical aspects of network survivability methodologies applied to real world scenarios"--Provided by publisher.
bull; Master advanced optical network design and management strategies bull; Learn from real-world case-studies that feature the Cisco Systems ONS product line bull; A must-have reference for any IT professional involved in Optical networks
This book takes a pragmatic approach to deploying state-of-the-art optical networking equipment in metro-core and backbone networks. The book is oriented towards practical implementation of optical network design. Algorithms and methodologies related to routing, regeneration, wavelength assignment, sub rate-traffic grooming and protection are presented, with an emphasis on optical-bypass-enabled (or all-optical) networks. The author has emphasized the economics of optical networking, with a full chapter of economic studies that offer guidelines as to when and how optical-bypass technology should be deployed. This new edition contains: new chapter on dynamic optical networking and a new chapter on flexible/elastic optical networks. Expanded coverage of new physical-layer technology (e.g., coherent detection) and its impact on network design and enhanced coverage of ROADM architectures and properties, including colorless, directionless, contentionless and gridless. Covers ‘hot’ topics, such as Software Defined Networking and energy efficiency, algorithmic advancements and techniques, especially in the area of impairment-aware routing and wavelength assignment. Provides more illustrative examples of concepts are provided, using three reference networks (the topology files for the networks are provided on a web site, for further studies by the reader). Also exercises have been added at the end of the chapters to enhance the book’s utility as a course textbook.
This book constitutes the refereed proceedings of the 23rd International IFIP conference on Optical Network Design and Modeling, ONDM 2019, held in Athens, Greece, in May 2019. The 39 revised full papers were carefully reviewed and selected from 87 submissions. The papers focus on cutting-edge research in established areas of optical networking as well as their adoption in support of a wide variety of new services and applications. This involves the most recent trends in networking including 5G and beyond, big data and network data analytics, cloud/edge computing, autonomic networking, artificial intelligence assisted networks, secure and resilient networks, that drive the need for increased capacity, efficiency, exibility and adaptability in the functions that the network can perform. In this context new disaggregated optical network architectures were discussed, exploiting and integrating novel multidimensional photonic technology solutions as well as adopting open hardware and software platforms relying on software defined networking (SDN), and network function virtualization (NFV) to allow support of new business models and opportunities.
This authoritative volume presents a comprehensive guide to the evaluation and design of networked systems with improved disaster resilience. The text offers enlightening perspectives on issues relating to all major failure scenarios, including natural disasters, disruptions caused by adverse weather conditions, massive technology-related failures, and malicious human activities. Topics and features: describes methods and models for the analysis and evaluation of disaster-resilient communication networks; examines techniques for the design and enhancement of disaster-resilient systems; provides a range of schemes and algorithms for resilient systems; reviews various advanced topics relating to resilient communication systems; presents insights from an international selection of more than 100 expert researchers working across the academic, industrial, and governmental sectors. This practically-focused monograph, providing invaluable support on topics of resilient networking equipment and software, is an essential reference for network professionals including network and networked systems operators, networking equipment vendors, providers of essential services, and regulators. The work can also serve as a supplementary textbook for graduate and PhD courses on networked systems resilience.
This book presents an in-depth treatment of routing and wavelength assignment for optical networks, and focuses specifically on quality-of-service and fault resiliency issues. It reports on novel approaches for the development of routing and wavelength assignment schemes for fault-resilient optical networks, which improve their performance in terms of signal quality, call blocking, congestion level and reliability, without a substantial increase in network setup cost. The book first presents a solution for reducing the effect of the wavelength continuity constraint during the routing and wavelength assignment phase. Further, it reports on an approach allowing the incorporation of a traffic grooming mechanism with routing and wavelength assignment to enhance the effective channel utilization of a given capacity optical network using fewer electrical-optical-electrical conversions. As a third step, it addresses a quality of service provision scheme for wavelength-division multiplexing (WDM)-based optical networks. Lastly, the book describes the inclusion of a tree-based fault resilience scheme in priority-based dispersion-reduced wavelength assignment schemes for the purpose of improving network reliability, while maintaining a better utilization of network resources. Mainly intended for graduate students and researchers, the book provides them with extensive information on both fundamental and advanced technologies for routing and wavelength assignment in optical networks. The topics covered will also be of interest to network planners and designers.
Today’s businesses increasingly rely on cloud computing, which brings both great opportunities and challenges. Resiliency is a critical challenges given that disruptions due to failures (either accidental or because of disasters or attacks) may entail significant revenue losses (e.g., USD 25.5 billion in 2010 for North America). Such failures may originate at any of the major components of the cloud architecture and propagate to others (i.e., data centers and optical networks). We investigate a large body of work focusing on resilience of cloud computing by presenting first the cloud computing architecture and concepts. Then, we categorize a large number of techniques for cloud computing infrastructure resiliency, ranging from designing and operating the facilities, servers, networks, to their integration and virtualization (e.g., middleware infrastructure). And, also we categorize techniques focused on resilience in application design and development. Cloud-computing services are provided to consumers through a system consisting of computing servers and communication network equipment which is typically referred to as a cloud network (CN). CN providers virtualize resources (e.g., virtual machines (VMs) and virtual networks (VNs)) for efficient and secure resource allocation. A natural disaster (e.g., an earthquake) or a human-made disaster (e.g., a weapons-of-mass-destruction attack (WMD)) not only produces cloud network disruptions caused by multiple infrastructure failures, but by subsequent and unpredictable disruptions induced by cascading failures. Major power grid outages could cause cascading failures on cloud infrastructure operation. We investigate the disaster resilient cloud network mapping in optical networks by proposing a proactive approach and a reactive approach. Our proactive approach is based on risk assessment, VM backup location, and post-disaster survivability to reduce the risk of failure, the probability of CN disconnection, and the penalty paid by operators and/or services providers due to loss of capacity. We formulate the proposed approach as an integer linear program (ILP) and study both disaster types. Our simulations show that our approach can lead to a reduction in the risk of CN disconnection and penalty up to 90% in both scenarios. However, proactive disaster protection requires large pre-provisioning of additional capacity before a possible disaster, with limited protection for later cascading failures. We also investigate a reactive, adaptive, and cascading-failure-aware CN disaster recovery scheme that reacts after the disaster, and uses risk modeling to reduce the capacity required for the recovery and minimizes the post-disaster disconnection of CNs. In this study, propagation patterns of power grid failures are used to estimate the location of cascading failures. Simulation results based on WMD attacks show that our approach can lead to significant reduction in the risk of CN disconnections due to cascading failures, while reducing up to 50% of the capacity required for recovery. Optical Cloud Radio Access Network (Optical C-RAN) will improve mobile radio coordination and resource efficiency to cloud computing services by allowing BaseBand processing Unit (BBU) functions to be virtualized and centralized, i.e., deployed in a BBU hotel. So we consider a BBU hoteling scheme based on the concept of Access Cloud Network (ACN) to provide virtualization and multi-tenancy functionalities in Optical C-RAN. An ACN consists of virtualized BBUs (vBBUs) placed in metro cloud data centers (metro DCs), and connected to a set of Remote Radio Heads (RRHs). Resiliency is a critical problem given the high traffic demand and strict transmission delay. We investigate the ACN resiliency against single network and processing failures by proposing five approaches for ACN resiliency: two of them based on 1+1 dedicated protection, another two based on low-cost degraded protection, and one based on auxiliary topology protection. Simulations confirm that 1+1 approaches require 100% additional resources to provide full survivability, while auxiliary topology scheme requires only 53% additional resource, and the degraded protection approach requires between 17% and 31% additional resources to provide partial survivability.
Optical networks are leaving the labs and becoming a reality. Despite the current crisis of the telecom industry, our everyday life increasingly depends on communication networks for information exchange, medicine, education, data transfer, commerce, and many other endeavours. High capacity links are required by the large futemet traffic demand, and optical networks remain one of the most promising technologies for meeting these needs. WDM systems are today widely deployed, thanks to low-cost at extreme data rates and high reliability of optical components, such as optical amplifiers and fixed/tunable filters and transceivers. Access and metropolitan area networks are increasingly based on optical technologies to overcome the electronic bottleneck at the network edge. Traditional multi-layer architectures, such as the widely deployed IP/ATM/SDH protocol stack, are increasingly based on WDM transport; further efforts are sought to move at the optical layer more of the functionalities available today in higher protocol layers. New components and subsystems for very high speed optical networks offer new design opportunities to network operators and designers. The trends towards dynamically configurable all-optical network infrastructures open up a wide range of new network engineering and design choices, which must face issues such as interoperability and unified control and management.
A comprehensive book on DWDM network design and implementation solutions Design Software Included Study various optical communication principles as well as communication methodologies in an optical fiber Design and evaluate optical components in a DWDM network Learn about the effects of noise in signal propagation, especially from OSNR and BER perspectives Design optical amplifier-based links Learn how to design optical links based on power budget Design optical links based on OSNR Design a real DWDM network with impairment due to OSNR, dispersion, and gain tilt Classify and design DWDM networks based on size and performance Understand and design nodal architectures for different classification of DWDM networks Comprehend different protocols for transport of data over the DWDM layer Learn how to test and measure different parameters in DWDM networks and optical systems The demand for Internet bandwidth grows as new applications, new technologies, and increased reliance on the Internet continue to rise. Dense wavelength division multiplexing (DWDM) is one technology that allows networks to gain significant amounts of bandwidth to handle this growing need. DWDM Network Designs and Engineering Solutions shows you how to take advantage of the new technology to satisfy your network's bandwidth needs. It begins by providing an understanding of DWDM technology and then goes on to teach the design, implementation, and maintenance of DWDM in a network. You will gain an understanding of how to analyze designs prior to installation to measure the impact that the technology will have on your bandwidth and network efficiency. This book bridges the gap between physical layer and network layer technologies and helps create solutions that build higher capacity and more resilient networks. Companion CD-ROM The companion CD-ROM contains a complimentary 30-day demo from VPIphotonicstrade; for VPItransmissionMakertrade;, the leading design and simulation tool for photonic components, subsystems, and DWDM transmission systems. VPItransmissionMaker contains 200 standard demos, including demos from Chapter 10, that show how to simulate and characterize devices, amplifiers, and systems.