Download or read book Performance Evaluation of Optical Packet Switching Technology written by Tuan Dung Nguyen and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid growth in client application demands, in terms of bandwidth and (QoS), has motivated the deployment of the optical technology at Metro Access and Metro Core Networks. More diverse and more intelligent optic devices are required for efficiently management of huge capacity in the network. The explosion in demand for network bandwidth is mainly due to the growth in data traffic whose nature is also becoming more and more complex. In general, most of service-based traffics are transported in networks which are now being dominated by the optical switching technology. Nevertheless, such technology has some drawbacks such as inflexible and non-scalable properties. (OPS), which offers significant benefits in terms of both network efficiency and control scalability, may overcome these limitations. This has motivated the orientation from optical circuit switching to optical packet switching in the future network infrastructure. In reality, optical packet switching ring (OPSR) networks, which combine the packet switching technology with the well-known advantages of ring topology such as fast service restoration in cases of failure and high gain of statistical traffic multiplexing over the ring, appear to be the technology of choice for the next generation of Metro Area Networks. A new OPSR architecture which is based on the all-optical infrastructure that offers intelligent features with lower cost while maximizing processing time and is now considering being replaced existing opto-electronic architectures such as Resilient Packet Ring, have been presented in the scope of the dissertation. The key element of such network is Packet Optical Add/Drop Multiplexer (POADM) which is implemented inside a ring node, allowing the node to exploit the optical transparency. This dissertation hence focuses on the performance evaluation of the new generation of OPSR network. In this dissertation, we have investigated the performance analysis (in terms of packet delay and queue-length distribution of access nodes) of an optical synchronous bus-based metropolitan network supporting fixed-size packets. We have modeled each access node by an embedded discrete time Markov chain (EDTMC). The solution of the EDTMC allows us to compute the approximate probability that access nodes on the bus “see” free slots in the transit line. Using a recursive analysis technique, we approximately outline the mean waiting time of client packets coming from the upper layer as well as an approximate queue-length distribution of local buffers at access nodes in two cases: with and without QoS guarantees. To characterize the performance of an asynchronous OPSR network, we have evaluated the impact of Optical fixed-Size Packet Creation on the network performance without and with different quality of services (QoS) requirements. Performance analysis of such systems has allowed us to identify a reasonable combination of some parameters (timeslot duration, timer expiration values, profile of client traffic and network load) which may be able to improve the bandwidth utilization of the network for a given traffic matrix. The most important point that we have mentioned in the dissertation is the comparison of two architectural approaches: Variable Length - Optical Packet Format (VL-OPF) model supporting empty packets versus Fixed Length - Optical Packet Format (FL-OPF) model. In addition to CoS-Upgrade Mechanism (CUM) which is proposed to improve the filling ratio of the optical container, we have proposed a novel mechanism named Dynamic CoS-Upgrade Mechanism (DCUM) where timers are dynamically changed according to the state of the local buffer of network nodes and the traffic circulating in the network, in order to create containers with a high filling ratio while limiting the time needed for their creation.

Download or read book Feasibility Study of Optical Packet Switching Network written by Ivan Kotuliak and published by . This book was released on 2003 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical technology supplies capabilities necessary to create an optical packet switching network providing large bandwidth, high-speed data transmission and service differentiation. The aim of this thesis work is a logical performance analysis of optical packet-switching network.Studied network is based on the synchronous optical packet switching. Main part of this work deals with the analysis of two architectures: interior switch and access node. Two interior node architectures are proposed: a memory less switch and switch incorporating memory buffers based on the fiber delay lines. The access node is studied with focus on its ingress functions. Two algorithms of optical packet creation are considered: assembly and segmentation.Performance of proposed nodes is evaluated using simulation tool and discrete-time Markov chain. We show that optical packet switching network performs very well under different conditions and it is one of the promising solutions for the future high-speed networks.

Download or read book Quality of Service in Optical Packet Switched Networks written by Akbar G. Rahbar and published by John Wiley & Sons. This book was released on 2015-02-19 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive study on OPS networks, its architectures, and developed techniques for improving its quality of switching and managing quality of service. The book includes: Introduction to OPS networks, OOFDM networks, GMPLS-enabled optical networks, QoS in OPS networks Hybrid contention avoidance/resolution schemes in both long-haul and metro optical networks Hybrid optical switching schemes

Download or read book Performance Evaluation of the Clockwork Routing Scheme in Optical Packet Switching Networks written by Franck Chevalier and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quality of Service in Optical Packet Switched Networks written by Akbar G. Rahbar and published by John Wiley & Sons. This book was released on 2015-02-23 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive study on OPS networks, its architectures, and developed techniques for improving its quality of switching and managing quality of service. The book includes: Introduction to OPS networks, OOFDM networks, GMPLS-enabled optical networks, QoS in OPS networks Hybrid contention avoidance/resolution schemes in both long-haul and metro optical networks Hybrid optical switching schemes

Download or read book Performance Analysis of High speed Optical Packet Switching in High Performance Computing and Datacentre Networks written by Wang Jingyan and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The massive growth in datacentre traffic, due to a huge increase in the deployment of data-intensive applications, is forcing datacentre infrastructure to migrate away from conventional electronic packet-switched networks, where capacity scaling imposes significant financial and technical constraints, and to evolve towards more advanced architectures. Motivated by this, new optical switching technologies and networking architectures, capable of providing very large bandwidth capacity, high scalability, high switching speed and high energy efficiency, are being targeted for building next-generation high-performance datacentre and High Performance Computing (HPC) networks. Optical packet switching technology is considered to be a long-term solution to meet these design challenges, as it can exploit fully the enormous potential capacity enabled by optics and support high switching flexibility at packet level. In this thesis, new wavelength-routed optical packet switching architectures, which exploit the functionalities of key optical switching components such as Tunable Wavelength Converters (TWCs), Arrayed Waveguide Gratings (AWGs) and Wavelength Selective Switches (WSSs), to realise all-optical switching, are proposed for use as next-generation datacentre and HPC networks. To maximise the efficiency of the proposed optical switching architecture, a dynamic bandwidth provisioning algorithm, which allocates switch resources to traffic demands based on application requirements, is developed to further enhance network flexibility, resource utilisation and network performance. Moreover, based on the proposed switch architectures, a large-scale high-performance datacentre network with flexible central control is modelled, with a view of determining the optimal network topology and traffic scheduling methods. This flexible network architecture employs a modular design and combines transparent optical packet switches, based on Arrayed Waveguide Grating (AWG) routers, and a hybrid congestion control scheme using recirculating Fibre Delay Lines (FDLs) along with novel packet retransmission schemes. The work carried out in this thesis indicates that the proposed network structure not only provides high scalability, capable of hosting hundreds of thousands of severs, but also delivers high bandwidth utilisation and network provisioning flexibility. The network offers a promising and viable networking solution to address current and future application needs in datacentre and HPC environments.

Download or read book High performance Packet Switching Architectures written by Itamar Elhanany and published by Springer Science & Business Media. This book was released on 2006-09-06 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internet traffic is increasing by at least 200% per year and this is the first book to report on the current state-of-the-art of packet-switching architectures. The book to covers the subject in a comprehensive survey and presents contributions from the leading researchers in industry and universities. A mix of theoretical and practical material makes this book an essential reference for researchers in academia as well as industrial engineers.

Download or read book Performance Evaluation of the X 25 Packet Switching Protocol Using Network II 5 Simulation Package written by Behjat Emdadi and published by . This book was released on 1988 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Analysis of Optical Packet switched Networks written by Shun Yao and published by . This book was released on 2001 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Novel Schemes and Performance Analysis of Ultrafast Packet switching Transparent Optical Networks written by Alberto Bononi and published by . This book was released on 1994 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Evaluation and High Speed Switching Fabrics and Networks written by Thomas G. Robertazzi and published by Wiley-IEEE Press. This book was released on 1993-05-05 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: A handy source for practicing engineers and researchers, this book offers collected examples of successful performance evaluation of high speed telecommunications switching fabrics such as ATM networks and high speed interconnection technology for computers. It emphasizes the performance evaluation of such switches as they apply to predicting a proposed system's performance through the use of statistical models -- a cost-saving way for communications engineers to test the design of a system without having to construct it.

Download or read book Optical Burst Switching Challenges Solutions and Performance Evaluation written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Burst Switching (OBS) is a prospective networking technology that can carry mankind to the next generation information superhighways. Networking services like HDTV, video-conferencing, grid computing and other bandwidth-hungry applications can see a new day with OBS potentially providing humongous throughput and utilization at the lower layers. The implementation benefits of OBS over the pure-breed optical packet switching (OPS) makes it a favorable technology for both academia and industry to ponder upon. Like any other technology growing through its infancy, OBS faces several challenges and provides several open research topics for researchers. In this dissertation, a few burning issues which we think are important are identified and solutions for them are proposed. In the first part, we propose an implementation of an OBS metropolitan area ring network. We propose several access protocols to efficiently transport different classes of traffc across the ring nodes. Three classes of traffic are identified, one of which has stringent end-to-end delay requirements and the other two require minimal or zero burst loss. Access protocols based on Token and acknowledgement techniques are considered and then developed to accommodate the above requirements. Extensive simulations are then carried out to depict the behaviour of each of the protocols and to verify that our objectives are met. In the second part, we propose a congestion ontrol architecture for OBS mesh networks. Congestion in OBS networks leads to extensive burst losses due to bufferless nature of these networks. We dentify several promising techniques which can be investigated upon to solve the congestion problem. We finally propose a congestion control architecture with multi-tier congestion avoidance schemes for different classes of traffic. In the third part, we present both an analytical solution and a numerical approach for modeling limited-range wavelength conversion in an OBS switch. The analytic.

Download or read book Performance Evaluation of Optical Burst Switched Networks written by Siamak Azodolmolky and published by LAP Lambert Academic Publishing. This book was released on 2012-06 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the performance evaluation of the Optical Burst Switched (OBS) networks. A simulation framework based on OPNET Modeler is designed and implemented to evaluate the performance of an OBS network in the presence of self-similar traffic sources. The impact of self-similar traffic sources and specific design parameters imposed on the network is assessed in terms of burst assembly delay, its jitter and burst loss ratio. The performance metrics have a strong dependency on parameters such as number of packets per burst, assembly timeout, number of available wavelengths and the degree of the traffic self-similarity. Furthermore, the impact of time and size-based burst assembly algorithms utilized in edge routers, on the self-similarity level of the output traffic, is evaluated. Both static & adaptive approaches are examined. This research utilizes the OPNET Modeler(r) focusing on the characteristics of the output traffic. Various Hurst parameter estimators have been applied to estimate the Hurst parameter of the aggregated input and output traffic streams. The performance impact of the burst assembly approaches in terms of burst assembly delay and its jitter is measured.

Download or read book Optical Switching written by Tarek S. El-Bawab and published by Springer Science & Business Media. This book was released on 2008-02-11 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of optical switching in network elements and communication networks are discussed in considerable depth. Optical circuits, packet, and burst switching are all included. Composed of distinct self-contained chapters with minimum overlaps and independent references. Provides up-to-date comprehensive coverage of optical switching, technologies, devices, systems and networks. Discusses applications of optical switching in network elements and communications networks.

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 Design and Performance Evaluation of a New Fast Packet Switch written by Amit Agrawal and published by . This book was released on 1994 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Assessment of an Optical Packet Switch Architecture with Highly Distributed Control in a Data Center Environment written by Roger Pueyo Centelles and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fast Optical Packet Switches (OPSs) scaling to the thousand ports count can represent a valuable solution to satisfy the fast-growing communication requirements of large Internet Data Centers (DCs). A novel system based on a Spanke architecture is suggested in this text, employing Wavelength-Division Multiplexing (WDM) to interconnect a large number of clusters of servers at 40 Gb/s and providing a high bandwidth capacity between them. By flattening the DC networking fabric, this novel system can offer communication between thousands of clusters with a sub-microsecond packet latency. This OPS architecture can facilitate sharing resources between servers and extending parallel distributed computation. This Master Thesis focuses on assessing the network performance of the novel OPS architecture under investigation by simulating its operation in a DC context.