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Traffic Grooming And Wavelength Conversion In Optical Networks
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Book Synopsis Traffic Grooming and Wavelength Conversion in Optical Networks by : Sashisekaran Thiagarajan
Download or read book Traffic Grooming and Wavelength Conversion in Optical Networks written by Sashisekaran Thiagarajan and published by . This book was released on 2001 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wavelength Division Multiplexing (WDM) using wavelength routing has emerged as the dominant technology for use in wide area and metropolitan area networks. Traffic demands in networks today are characterized by dynamic, heterogeneous flows. While each wavelength has transmission capacity at gigabit per second rates, users require connections at rates that are lower than the full wavelength capacity. In this thesis, we explore network design and operation methodologies to improve the network utilization and blocking performance of wavelength routing networks which employ a layered architecture with electronic and optical switching. First we provide an introduction to first generation SONET/SDH networks and wavelength routing networks, which employ optical crossconnects. We explain the need and role of wavelength conversion in optical networks and present an algorithm to optimally place wavelength conversion devices at the network nodes so as to optimize blocking performance. Our algorithm offers significant savings in computation time when compared to the exhaustive method. To make the network viable and cost-effective, it must be able to offer sub-wavelength services and be able to pack these services efficiently onto wavelengths. The act of multiplexing, demultiplexing and switching of sub-wavelength services onto wavelengths is defined as traffic grooming. Constrained grooming networks perform grooming only at the network edge. Sparse grooming networks perform grooming at the network edge and the core. We study and compare the effect of traffic grooming on blocking performance in such networks through simulations and analyses. We also study the issue of capacity fairness in such networks and develop a connection admission control (CAC) algorithm to improve the fairness among connections with different capacities. We finally address the issues involved in dynamic routing and wavelength assignment in survivable WDM grooming networks. We develop two schemes for grooming primary and backup traffic steams onto wavelengths: Mixed Primary-Backup Grooming Policy (MGP) and Segregated Primary-Backup Grooming Policy (SGP). MGP is useful in topologies such as ring, characterized by low connectivity and high load correlation and SGP is useful in topologies, such as mesh-torus, with good connectivity and a significant amount of traffic switching and mixing at the nodes.
Book Synopsis Survivability and Traffic Grooming in WDM Optical Networks by : Arun Somani
Download or read book Survivability and Traffic Grooming in WDM Optical Networks written by Arun Somani and published by Cambridge University Press. This book was released on 2006-01-19 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Traffic Grooming for Optical Networks by : Rudra Dutta
Download or read book Traffic Grooming for Optical Networks written by Rudra Dutta and published by Springer Science & Business Media. This book was released on 2008-08-06 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the practical motivation, theoretical description, and extant techniques for traffic grooming in optical networks. The description of the various topics of research will be authored by leading researchers in this area, and will contain comprehensive description of related literature for each area. This book is intended to be a definitive reference and text for traffic grooming both for the practitioner in industry and the student in academia.
Book Synopsis Traffic Grooming in IP Over WDM Optical Networks by : Jing Fang
Download or read book Traffic Grooming in IP Over WDM Optical Networks written by Jing Fang and published by . This book was released on 2004 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Telecommunication networks evolve as technology advances and society changes. Optical communications employing Wavelength Division Multiplexing (WDM) has become the dominant technology for use in backbone networks. As IP gains in popularity, the traffic pattern in carrier networks is increasingly becoming data centric. This has led to a change in the network infrastructure and many researchers believe that networks are evolving towards the slim two-layer model of IP over WDM. In this dissertation, we address several fundamentl issues of the grooming network design - the process of multiplexing, demultiplexing and switching lower rate traffic stream onto and off of higher capacity wavelengths, in the context of IP over WDM. We explain how wavelength continuity constraint and wavelength usage constraint affect network performance. Based on our research, we infer that, in practical WDM networks with wavelength usage constraint, increasing the total number of available wavelengths in a fiber is an attractive alternative to employing wavelength conversion. We investigate traffic grooming performed in IP layer, where the sub-wavelength level IP packets are grouped together in electrical domain before they are sent to the WDM layer. We study IP traffic grooming problem with the objective to minimize the number of transmitters and receivers needed in the WDM layer. We propose three routing strategies for allocating dynamic traffic requests and evaluate their blocking performance. The third issue addressed in this dissertaion is IP traffic grooming in a recently proposed architecture called light trails. We define the light trail design problem and identify the minimum number of light trails to carry the given traffic demand. We formulate an ILP and develop two heuristic approaches for obtaining fast and near-optimal solutions in large networks. We finally address the issue of fault management in grooming networks. We study shared and dedicated protection against single link failure in WDM grooming networks and develop an ILP formulation for each of them. We extend our research on the full protection design to partial protection where the backup capacity is smaller than the primary capacity. We present ILP formulations and design a dynamic routing strategy named shortest-available-least congested routing.
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 454 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.
Book Synopsis Optical WDM Networks by : Biswanath Mukherjee
Download or read book Optical WDM Networks written by Biswanath Mukherjee and published by Springer Science & Business Media. This book was released on 2006-06-15 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research and development on optical wavelength-division multiplexing (WDM) networks have matured considerably. While optics and electronics should be used appropriately for transmission and switching hardware, note that "intelligence'' in any network comes from "software,'' for network control, management, signaling, traffic engineering, network planning, etc.The role of software in creating powerful network architectures for optical WDM networks is emphasized. Optical WDM Networks is a textbook for graduate level courses. Its focus is on the networking aspects of optical networking, but it also includes coverage of physical layers in optical networks. The author introduces WDM and its enabling technologies and discusses WDM local, access, metro, and long-haul network architectures. Each chapter is self-contained, has problems at the end of each chapter, and the material is organized for self study as well as classroom use. The material is the most recent and timely in capturing the state-of-the-art in the fast-moving field of optical WDM networking.
Book Synopsis Traffic Grooming in Optical WDM Mesh Networks by : Keyao Zhu
Download or read book Traffic Grooming in Optical WDM Mesh Networks written by Keyao Zhu and published by Springer Science & Business Media. This book was released on 2006-03-30 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical networks based on wavelength-division multiplexing (WDM) tech nology offer the promise to satisfy the bandwidth requirements of the Inter net infrastructure, and provide a scalable solution to support the bandwidth needs of future applications in the local and wide areas. In a waveleng- routed network, an optical channel, referred to as a lightpath, is set up between two network nodes for communication. Using WDM technology, an optical fiber link can support multiple non-overlapping wavelength channels, each of which can be operated at the data rate of 10 Gbps or 40 Gbps today. On the other hand, only a fraction of customers are expected to have a need for such a high bandwidth. Due to the large cost of the optical backbone infrastruc ture and enormous WDM channel capacity, connection requests with diverse low-speed bandwidth requirements need to be efficiently groomed onto hi- capacity wavelength channels. This book investigates the optimized design, provisioning, and performance analysis of traffic-groomable WDM networks, and proposes and evaluates new WDM network architectures. Organization of the Book Significant amount of research effort has been devoted to traffic grooming in SONET/WDM ring networks since the current telecom networks are mainly deployed in the form of ring topologies or interconnected rings. As the long-haul backbone networks are evolving to irregular mesh topologies, traffic grooming in optical WDM mesh networks becomes an extremely important and practical research topic for both industry and academia.
Book Synopsis Analyzing Wavelength and Traffic Grooming in Optical WDM Networks by : Wajid Ali
Download or read book Analyzing Wavelength and Traffic Grooming in Optical WDM Networks written by Wajid Ali and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work have analyzed the effect of increasing number of wavelength converters and grooming devices over the network performance. Deciding the amount and location of these devices to be used in a network is equally important. For this purpose, different placement schemes are used on the proposed network model and assumptions. Our work has been done through the simulations of different device placement scenarios and the results have been analyzed using blocking probability as the performance metric. We have reviewed the performance of wavelength converters with different grooming devices.
Book Synopsis Routing and Wavelength Assignment for WDM-based Optical Networks by : Bijoy Chand Chatterjee
Download or read book Routing and Wavelength Assignment for WDM-based Optical Networks written by Bijoy Chand Chatterjee and published by Springer. This book was released on 2016-10-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Elastic Optical Networks by : Víctor López
Download or read book Elastic Optical Networks written by Víctor López and published by Springer. This book was released on 2016-06-13 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents advances in the field of optical networks - specifically on research and applications in elastic optical networks (EON). The material reflects the authors’ extensive research and industrial activities and includes contributions from preeminent researchers and practitioners in optical networking. The authors discuss the new research and applications that address the issue of increased bandwidth demand due to disruptive, high bandwidth applications, e.g., video and cloud applications. The book also discusses issues with traffic not only increasing but becoming much more dynamic, both in time and direction, and posits immediate, medium, and long-term solutions throughout the text. The book is intended to provide a reference for network architecture and planning, communication systems, and control and management approaches that are expected to steer the evolution of EONs.
Book Synopsis Performance Analysis of Traffic-Groomed Optical Networks by :
Download or read book Performance Analysis of Traffic-Groomed Optical Networks written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wavelength division multiplexing (WDM) has emerged as a viable solution to the increasing bandwidth demands of current backbone networks. Traffic grooming allows the resources available on a single wavelength to be utilized by multiple traffic streams. These networks will support large amounts of traffic from various sources. In view of this, our research focuses on the analysis of such types of networks, and in particular on a traffic-groomed tandem optical network that supports multiple sources each with unique resource requirements. We developed a decomposition algorithm for the analysis of this network using a modified version of Courtois' method. This work was extended to analyze tandem networks with a large number of wavelengths and resources per wavelength using a modified version of the recursion developed by Nilsson et. al. Finally, we extended our work to a traffic-groomed tandem optical network employing alternate routing and supporting traffic from multiple sources. For each method, numerical results show that, overall, our approximation provides good accuracy.
Book Synopsis Survivability and Traffic Grooming in WDM Optical Networks by : Arun Somani
Download or read book Survivability and Traffic Grooming in WDM Optical Networks written by Arun Somani and published by . This book was released on 2006-01-12 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides coverage of survivability and traffic grooming; two key issues in modern optical networks.
Book Synopsis Optical WDM Networks by : Hongyue Zhu
Download or read book Optical WDM Networks written by Hongyue Zhu and published by . This book was released on 2005 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissemination of Information in Optical Networks: by : Subir Bandyopadhyay
Download or read book Dissemination of Information in Optical Networks: written by Subir Bandyopadhyay and published by Springer Science & Business Media. This book was released on 2007-10-24 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a broad overview of techniques used in the design of Wavelength Division Multiplexing (WDM) networks for efficient dissemination of information in computer networks. It starts with an overview of the hardware components then provides a thorough review of WDM. Each topic is covered rigorously with emphasis on detailed explanations of the approaches used. Numerous exercises are included.
Book Synopsis The Handbook of Optical Communication Networks by : Mohammad Ilyas
Download or read book The Handbook of Optical Communication Networks written by Mohammad Ilyas and published by CRC Press. This book was released on 2003-04-14 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Internet revolution. Once, the public was delighted with 14.4 modem access and fascinated by low-tech Web site content. But not for long. Technology has raced to keep up with users' calls for high-speed facilities and advanced applications. With the development of high-speed transmission media and the availability of high-speed hardware, we are
Book Synopsis Reconfiguration of Sub-wavelength Groomed Wavelength Routed Optical Networks by : Ruhiyyih Mahalati
Download or read book Reconfiguration of Sub-wavelength Groomed Wavelength Routed Optical Networks written by Ruhiyyih Mahalati and published by . This book was released on 2003 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: reconfiguration, Traffic grooming, wavelength routed optical networks.
Book Synopsis Wavelength Converters in Optical Networks by : K R Venugopal
Download or read book Wavelength Converters in Optical Networks written by K R Venugopal and published by I K International Pvt Ltd. This book was released on 2008-07-25 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first generation networks built before the emergence of fiber optics and the second generation networks which used fiber as a replacement for copper links in Local Area network (LAN), Metropolitan Area Network (MAN) and Wide Area Network (WAN) are not adequate to meet the emerging integrated demands of the communication applications. Huge bandwidth must be provided to support applications such as super-computer interconnect, videoconferencing, etc., co-existing with smaller bandwidth requirements of data, audio, and many other applications for thousands of end-users. Wavelength Converters in Optical Networks deals with the third generation networks that use Wavelength Division Multiplexing (WDM), wavelength routed optical networking technology. This technology can efficiently utilize the enormous bandwidth of the optical fiber and has been able to meet the emerging integrated demands of the communication applications.
