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Author: Clara Kronberger
Publisher:
ISBN: 9783868539233
Category :
Languages : en
Pages : 171
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Book Description
Author: Clara Kronberger
Publisher:
ISBN: 9783868539233
Category :
Languages : en
Pages : 171
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Book Description
Author: D. W. Faulkner
Publisher: IOS Press
ISBN: 9789051994971
Category : Computers
Languages : en
Pages : 360
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Book Description
WDM Networks and Systems, Network Planning and Management The demand for ever more capacity over the lucrative long-haul routes coupled with the need for higher reliability is pushing optical technology towards its limits. WDM systems allow upgrading of existing core networks and offer new opportunities for long-haul systems design towards ultimate terrabit systems. The prospect of an all-optical layer offers new possibilities for dynamic management of capacity and protection switching. Papers published in these proceedings: *Explore business opportunities for WDM systems *Highlight recent advances in key technologies such as add drop multiplexers, arrayed planar waveguides, and broadband EDFAs *Present new bandwidth management techniques *Push the transmission limits to the technology by minimising dispersion, non-linearities and intermodulation effects, and charts the way to soliton systems.
Author: Luis Velasco
Publisher: John Wiley & Sons
ISBN: 111934042X
Category : Science
Languages : en
Pages : 484
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Book Description
Explains the importance of Elastic Optical Networks (EONs) and how they can be implemented by the world’s carriers This book discusses Elastic Optical Networks (EONs) from an operational perspective. It presents algorithms that are suitable for real-time operation and includes experimental results to further demonstrate the feasibility of the approaches discussed. It covers practical issues such as provisioning, protection, and defragmentation. It also presents provisioning and recovery in single layer elastic optical networks (EON). The authors review algorithms for provisioning point-to-point, anycast, and multicast connections, as well as transfer-based connections for datacenter interconnection. They also include algorithms for recovery connections from failures in the optical layer and in-operation planning algorithms for EONs. Provisioning, Recovery and In-operation Planning in Elastic Optical Network also examines multi-layer scenarios. It covers virtual network topology reconfiguration and multi-layer recovery, and includes provisioning customer virtual networks and the use of data analytics in order to bring cognition to the network. In addition, the book: Presents managing connections dynamically—and the flexibility to adapt the connection bitrate to the traffic needs fit well for new types of services, such as datacenter interconnection and Network Function Virtualization (NFV) Examines the topic in a holistic and comprehensive way, addressing control and management plane issues for provisioning, recovery, and in-operation planning Covers provisioning, recovery, and in-operation planning for EONs at the proposed exhaustive level The rapid expanse of new services has made the use of EONs (a relatively new concept) a necessity. That’s why this book is perfect for students and researchers in the field of technologies for optical networks (specifically EONs), including network architectures and planning, dynamic connection provisioning, on-line network re-optimization, and control and management planes. It is also an important text for engineers and practitioners working for telecom network operators, service providers, and vendors that require knowledge on a rapidly evolving topic.
Author: Jacek Rak
Publisher: Springer Nature
ISBN: 3030446859
Category : Computers
Languages : en
Pages : 813
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Book Description
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.
Author: Konstantinos Manousakis
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
In this chapter, novel attack-aware routing and wavelength assignment (Aa-RWA) algorithms for multiperiod network planning are proposed. The considered physical layer attacks addressed in this chapter are high-power jamming attacks. These attacks are modeled as interactions among lightpaths as a result of intra-channel and/or inter-channel crosstalk. The proposed Aa-RWA algorithm first solves the problem for given traffic demands, and subsequently, the algorithm is enhanced in order to deal with demands under uncertainties. The demand uncertainty is considered in order to provide a solution for several periods, where the knowledge of demands for future periods can only be estimated. The objective of the Aa-RWA algorithm is to minimize the impact of possible physical layer attacks and at the same time minimize the investment cost (in terms of switching equipment deployed) during the network planning phase.
Author: Ralf Lehnert
Publisher: Springer Science & Business Media
ISBN: 3642235409
Category : Computers
Languages : en
Pages : 233
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Book Description
This book constitutes the refereed proceedings of the 17th EUNICE 2011 Workshop on energy-aware communications, held in Dresden, in September 2011. The proceedings comprise 16 full papers and 7 poster papers which are presented together with the abstracts of the 3 invited talks. The topics covered are: network architectures; ad-hoc and wireless networks; system simulation; network planning, optimization, and migration; traffic engineering; quality of experience; and energy efficient architectures.
Author: Konstantinos Manousakis
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
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Book Description
In this chapter, novel attack-aware routing and wavelength assignment (Aa-RWA) algorithms for multiperiod network planning are proposed. The considered physical layer attacks addressed in this chapter are high-power jamming attacks. These attacks are modeled as interactions among lightpaths as a result of intra-channel and/or inter-channel crosstalk. The proposed Aa-RWA algorithm first solves the problem for given traffic demands, and subsequently, the algorithm is enhanced in order to deal with demands under uncertainties. The demand uncertainty is considered in order to provide a solution for several periods, where the knowledge of demands for future periods can only be estimated. The objective of the Aa-RWA algorithm is to minimize the impact of possible physical layer attacks and at the same time minimize the investment cost (in terms of switching equipment deployed) during the network planning phase.
Author: Julia Pahl
Publisher: Springer
ISBN: 3642215270
Category : Computers
Languages : en
Pages : 684
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Book Description
This book constitutes the refereed proceedings of the 5th International Conference on Network Optimization, INOC 2011, held in Hamburg, Germany, in June 2011. The 65 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers highlight recent developments in network optimization and are organized in the following topical sections: theoretical problems, uncertainty, graph theory and network design; network flows; routing and transportation; and further optimization problems and applications (energy oriented network design, telecom applications, location, maritime shipping, and graph theory).
Author: Alberto Castro
Publisher:
ISBN:
Category :
Languages : en
Pages : 219
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Book Description
The ever increasing IP traffic volume has finally brought to light the high inefficiency of current wavelength-routed over rigid-grid optical networks in matching the client layer requirements. Such an issue results in the deployment of large-size, expensive and power-consuming Multiprotocol Label Switching (MPLS) layers to perform the required grooming/aggregation functionality. To deal with this problem, the emerging flexgrid technology, allowing for reduced size frequency grids, is being standardized. Flexgrid optical networks divide the spectrum into frequency slots providing finer granularity than rigid networks based on Dense Wavelength Division Multiplexing (DWDM). To find a feasible allocation, new Routing and Spectrum Allocation (RSA) algorithms for flexgrid optical networks need to be designed and evaluated. Furthermore, due to the flexibility of flexible optical networks, the aggregation functions and statistical multiplexing can be partially located in the optical layer. In addition, given the special characteristics of flexible optical networks, the traditional mechanisms for protection and recovery must be reformulated. Optical transport platforms are designed to facilitate the setting up and tearing down of optical connections (lightpaths). Combining remotely configurable optical cross-connects (OXCs) with a control plane provides the capability of automated lightpath set-up for regular provisioning, and real-time reaction to the failures, being thus able to reduce Operational Expenditures (OPEX). However, to exploit existing capacity, increase dynamicity, and provide automation in future networks, current management architectures, utilizing legacy Network Management Systems (NMS) need to be radically transformed. This thesis is devoted to design optical networks and to devise algorithms to operate them. Network design objective consists of: i.Analyzing the cost implications that a set of frequency slot widths have on the Capital Expenditures (CAPEX) investments required to deploy MPLS-over-flexgrid networks; ii.Studying recovery schemes, where a new recovery scheme specifically designed for flexgrid-based optical networks is proposed. As for network operation, we focus on: i.Studying provisioning, where two provisioning algorithms are proposed: the first one targets at solving the RSA problem in flexgrid networks, whereas the second one studies provisioning considering optical impairments in translucent DWDM networks; ii.Getting back to the recovery problem, we focus on algorithms to cope with restoration in dynamic scenarios. Several algorithms are proposed for both single layer and multilayer networks to be deployed in the centralized Path Computation Element (PCE); iii.One of the main problems in flexgrid networks is spectrum defragmentation. In view of that, we propose an algorithm to reallocate already established optical connections so as to make room for incoming requests. This algorithm is extended with elasticity to deal with time-varying traffic. The above algorithms are firstly implemented and validated by using simulation, and finally experimentally assessed in real test-beds. In view of PCE architectures do not facilitate network reconfiguration, we propose a control and management architecture to allow the network to be dynamically operated; network resources can be made available by reconfiguring and/or re-optimizing the network on demand and in real-time. We call that as in-operation network planning. It shall be mentioned that part of the work reported in this thesis has been done within the framework of several European and National projects, namely STRONGEST (FP7-247674), IDEALIST (FP7-ICT-2011-8), and GEANT (FP7-238875) funded by the European Commission, and ENGINE (TEC2008-02634) and ELASTIC (TEC2011-27310) funded by the Spanish Science Ministry.
Author: Ajmal Muhammad
Publisher:
ISBN: 9789175191157
Category : Optical communications
Languages : en
Pages : 106
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Book Description
