Modeling, Performance Analysis, and Survivability Evaluation of Multi-fiber WDM Optical Networks PDF Download

Author: Fahad A. Al-Zahrani
Publisher:
ISBN:
Category : Optical communications
Languages : en
Pages : 484

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Author: Neophytos Neo Antoniades
Publisher: Springer Science & Business Media
ISBN: 1461410924
Category : Technology & Engineering
Languages : en
Pages : 536

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Book Description
Modeling, Simulation, Design and Engineering of WDM Systems and Networks provides readers with the basic skills, concepts, and design techniques used to begin design and engineering of optical communication systems and networks at various layers. The latest semi-analytical system simulation techniques are applied to optical WDM systems and networks, and a review of the various current areas of optical communications is presented. Simulation is mixed with experimental verification and engineering to present the industry as well as state-of-the-art research. This contributed volume is divided into three parts, accommodating different readers interested in various types of networks and applications. The first part of the book presents modeling approaches and simulation tools mainly for the physical layer including transmission effects, devices, subsystems, and systems), whereas the second part features more engineering/design issues for various types of optical systems including ULH, access, and in-building systems. The third part of the book covers networking issues related to the design of provisioning and survivability algorithms for impairment-aware and multi-domain networks. Intended for professional scientists, company engineers, and university researchers, the text demonstrates the effectiveness of computer-aided design when it comes to network engineering and prototyping.

Author: Arun Somani
Publisher:
ISBN: 0511133960
Category : Technology & Engineering
Languages : en
Pages : 460

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Book Description
This book provides coverage of survivability and traffic grooming; two key issues in modern optical networks.

Author: Mounire El Houmaidi
Publisher:
ISBN:
Category :
Languages : en
Pages : 207

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Book Description
Wavelength division multiplexed (WDM) optical networks are rapidly becoming the technology of choice in network infrastructure and next-generation Internet architectures. WDM networks have the potential to provide unprecedented bandwidth, reduce processing cost, achieve protocol transparency, and enable efficient failure handling. This dissertation addresses the important issues of improving the performance and enhancing the reliability of WDM networks as well as modeling and evaluating the performance of these networks.

Author: Arun Somani
Publisher: Cambridge University Press
ISBN: 9781139448482
Category : Technology & Engineering
Languages : en
Pages : 468

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Book Description
The advent of fiber optic transmission systems and wavelength division multiplexing (WDM) have led to a dramatic increase in the usable bandwidth of single fiber systems. This book provides detailed coverage of survivability (dealing with the risk of losing large volumes of traffic data due to a failure of a node or a single fiber span) and traffic grooming (managing the increased complexity of smaller user requests over high capacity data pipes), both of which are key issues in modern optical networks. A framework is developed to deal with these problems in wide-area networks, where the topology used to service various high-bandwidth (but still small in relation to the capacity of the fiber) systems evolves toward making use of a general mesh. Effective solutions, exploiting complex optimization techniques, and heuristic methods are presented to keep network problems tractable. Newer networking technologies and efficient design methodologies are also described.

Author: Canhui (Sam) Ou
Publisher: Springer Science & Business Media
ISBN: 0387244999
Category : Technology & Engineering
Languages : en
Pages : 199

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Book Description
Covers these key topics: Shared-mesh protection for optical WDM networks. Survivable traffic grooming for hierarchical optical WDM networks. Survivable data over next-generation SONET/SDH with inverse multiplexing.

Author: Minjing Mao
Publisher:
ISBN: 9781361291610
Category :
Languages : en
Pages :

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Book Description
This dissertation, "Design and Analysis of Survivable WDM Optical Network" by Minjing, Mao, 毛忞婧, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Optical networks with Wavelength Division Multiplexing (WDM) technology provide huge bandwidth to meet the ever-increasing traffic demand of the next generation Internet. But the high-speed nature of WDM networks also makes the network more vulnerable to failures. Even a single network failure for a very short duration can result in enormous loss of data. In this thesis, we concentrate on designing a survivable WDM network. In essence, survivability concerns two important aspects, fast fault detection and localization, and fast fault recovery. We first study fast fault detection and localization in WDM optical networks. Our work is based on the notion of monitoring cycle (m-cycle). Compared with other fault detection schemes, an m-cycle based fault detection scheme provides fast fault detection and requires less number of expensive monitors. Aiming at further cutting down the implementation cost, we propose the notion of super monitor. Instead of having a dedicated monitor for each m-cycle, a single super monitor can be placed at the junction of a set of overlapped m-cycles. In this thesis, we formulate and solve the monitor placement problem. We then focus on enhancing the capacity efficiency of fast fault recovery schemes. Shared backup path protection (SBPP) schemes can provide 100% protection against any single link failure. This is achieved by establishing a pair of link-disjoint active and backup paths upon each call arrival. The bandwidth on different backup paths can be shared for protecting different calls. In this thesis, a new SBPP scheme is designed based on a two-step routing approach, where the active and backup paths are sequentially optimized with different objectives in mind. We then shift our focus to design fast protection scheme for multicast/broadcast communications. To this end, we refine the existing concept of blue/red tree. Blue/red tree is a pair of spanning trees where the connectivity between the root and any destination node is ensured upon a network failure. In particular, two efficient integer linear programs (ILPs) are formulated for finding the optimal blue/red trees. Last but not the least, we investigate the survivability in IP networks. We notice that existing efforts on IP fast reroute (IPFRR) are effective in enhancing the IP resilience. But the impact of IPFRR on the end-to-end TCP performance is ignored. Notably, path rerouting can interfere with the TCP congestion control mechanism and thus cause severe throughput degradation. To address this problem, we propose a duplicate acknowledgement (ACK) suppression scheme. The key idea is to detect whether an out-of-order packet arrival event is due to IPFRR or not. If it is due to IPFRR, duplicate ACKs triggered will be suppressed by the TCP receiver so as not to cause unnecessary slow down at the TCP sender. DOI: 10.5353/th_b4784968 Subjects: Wavelength division multiplexing Optical communications - Design and construction

Author: Ye Tao
Publisher:
ISBN:
Category :
Languages : en
Pages : 264

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Book Description
Abstract: Wavelength Division Multiplexing (WDM) is now being widely used in optical networks. WDM significantly increases the capacity of a single fiber by allowing it to simultaneously transmit multiple wavelengths. While such enormous capacity is very exciting, it has also led to the advent of drastically more complex WDM networks. In this work, we consider two architecture design problems for optical networks: (1) the optimal amplifier placement problem, and (2) the traffic grooming, routing, and protection problem for optical networks. In an optical network, optical signals from transmitters attenuate gradually as they propagate through optical fibers, therefore their strength needs to be restored by optical amplifiers before they become too weak to be detected by receivers. Optical amplifiers, however, also introduce the spontaneous emission noise, which is a major problem associated with them. In general, a long optical channel needs enough amplifiers in order to limit the cumulative spontaneous emission noise and attain adequate amplification gain. In our amplifier placement problem, the goal is to minimize the cost associated with optical amplifiers in an optical network subject to constraints on the cumulative spontaneous emission noise. The optical network can be a linear or a mesh network, and the locations of amplifiers can be arbitrary or pre-specified, which are referred as continuous and discrete case, respectively. We propose several different methods based on various optimization techniques and heuristics to solve the problem. In the second part of this work, we consider the traffic grooming, routing, and protection problem in optical networks. There are two basic architectures used in optical networks: ring and mesh. The ring architecture is relatively simple and easy to implement, and it also provides a straightforward way for traffic protection. On the other hand, the mesh architecture is more resilient to various network failures, but is much more complex. Recently, a hybrid architecture that is based on and takes advantage of both ring and mesh architectures has been proposed. We study the traffic grooming, routing, and protection problem for ring, mesh, and hybrid architectures, and use a two-step approach in conjunction with the linear programming technique to solve the problem. Numerical results are provided for a comprehensive comparison between these different architectures.

Author: Tianjian Li
Publisher:
ISBN:
Category : Optical communications
Languages : en
Pages : 141

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Book Description
Wavelength division multiplexing (WDM) optical networks are widely viewed as the most appropriate choice for future Internet backbone with the potential to fulfill the ever-growing demands for bandwidth. WDM divides the enormous bandwidth of an optical fiber into many non-overlapping wavelength channels, each of which may operate at the rate of 10 Gigabit per second or higher. A failure in a network such as a cable cut may result in a tremendous loss of data. Therefore, survivability is a very important issue in WDM optical networks. The objective of this dissertation is to address the survivability provisioning problem in WDM optical networks under a scheduled traffic model and a sliding scheduled traffic model that we propose. In contrast to the conventional traffic models considered in communication networks such as static traffic model and dynamic random traffic model, the scheduled traffic model and the sliding scheduled traffic model are able to capture the traffic characteristics of applications that require capacity on a time-limited basis. They also give service providers more flexibility in provisioning the requested demands and a better opportunity to optimize the network resources. The survivability provisioning problem is to determine a pair of link-disjoint paths under the link failure model or a pair of SRLG-disjoint paths under the Shared Risk Link Group (SRLG) failure model, one working path and one protection path, for each demand in a given set of traffic demands with the objective of minimizing the total resources used by all traffic demands while 100% restorability is guaranteed against any single failure. To provision survivable service under the scheduled traffic model, we develop two sets of integer linear program (ILP) formulations for joint and non-joint optimizations using different protection schemes such as dedicated and shared path based protections. We also design a capacity provision matrix based Iterative Survivable Routing (ISR) algorithm with different demand scheduling policies to solve the survivable routing and wavelength assignment (RWA) problem. In addition, we extend the heuristic algorithm design from dealing with single link failure to single SRLG failure. The issue of survivability provisioning in WDM optical networks under the sliding scheduled traffic model has never been addressed by the research community. In the dissertation, we carry out the following tasks under this traffic model: (a) development of RWA ILP optimization formulations for dedicated and shared path based protection; (b) design and implementation of efficient heuristic algorithms for shared path based protection. Specifically, in the proposed heuristic algorithm, we introduce a demand time conflict reduction algorithm to minimize the time overlapping among a set of demands by properly placing a demand within its associated time window; and (c) extending the heuristic algorithm design under the single link failure model to the single SRLG failure model.

Author: Edward Mutafungwa
Publisher:
ISBN: 9789512271757
Category :
Languages : en
Pages : 55

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Book Description