Download or read book Performance Evaluation of Optical Burst Switching Networks written by Yu Peng and published by . This book was released on 2010 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Performance Analysis of Optical Burst Switched Networks with Dynamic Simultaneous Link Possession written by Tzvetelina Battestilli and published by . This book was released on 2005 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: simultaneous possession, queueing network, optical networks, optical burst switching, performance evaluation.
Download or read book An Analytical Approach to Optical Burst Switched Networks written by T. Venkatesh and published by Springer Science & Business Media. This book was released on 2010-03-16 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of the art results on modeling and analysis of OBS networks. It provides researchers with new directions for future research and helps them gain a better understanding of modeling OBS networks. This book classifies all the literature on modeling and analysis of OBS networks and serves as a thought provoking material for the researchers working on the analysis of high-speed networks. The scope of this book however is not limited to OBS networks alone but extends to high-speed communication networks with limited or no buffers.
Download or read book Performance Evaluation of Throughput in Optical Burst Switching written by Praveen Panati and published by . This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis of Optical Burst Switched Networks written by Lisong Xu and published by . This book was released on 2002 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: optical networks, protocol design, queuing theory, optical burst switching, performance analysis.
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 Quality of Service in Optical Burst Switched Networks written by Kee Chaing Chua and published by Springer Science & Business Media. This book was released on 2007-12-24 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Burst Switching (OBS) offers a promising switching technique to support huge bandwidth requirements in optical backbone networks that use Wavelength Division Multiplexing. This book details the quality of service (QoS) issue in OBS networks. It examines the basic mechanisms to improve overall QoS in OBS networks as well as discusses the relative QoS differentiation among multiple service classes in OBS networks. Coverage also details absolute QoS provisioning in OBS networks, end-to-end QoS provisioning in OBS networks, and some non-mainstream research issues and future research directions in OBS networks.
Download or read book Selected Topics in Optical Burst Switched Networks Performance Analysis written by Laura Capdevila Masdeu and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Analysis of Optical Burst Switched Networks written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, we studied the performance of Optical Burst Switching (OBS). OBS is a promising new solution for the next-generation optical Internet. In the first part of the dissertation, we studied a novel WDM ring network with OBS. The ring consists of N nodes, and each node owns a home wavelength on which it transmits its bursts. The ring operates under the fixed transmitter tunable receiver (FTTR) scheme. Control information is transmitted on a separate control channel. We proposed five different burst switching access protocols. We also studied the performance of these access protocols in terms of throughput, packet delay, throughput fairness, and delay fairness under different network parameters: average packet arrival rate, maximum burst size, and minimum burst size. Finally, we proposed a new offset calculation method, which can significantly simplify the access protocol design, and reduce the packet delay for all access protocols. In the second part of the dissertation, we analyzed an edge node of a WDM OBS mesh network using a new burst arrival process, which is more realistic than the well-known Poisson process. The edge node is modeled as a closed non-product-form queueing network, consisting of special nodes with orbiting customers. Despite the rich literature in queueing network analysis, this particular queueing network with orbiting customers has not been analyzed before. We developed algorithms for both the single-class and multi-class queueing networks. The single-class queueing network is solved using Marie's method. In the case of no converters, we obtained a closed-form expression of the conditional throughput of the special node with orbiting customers. The multi-class queueing network is analyzed by decomposition. Specifically, a multiple-class queueing network is decomposed into a set of two-class queueing networks, and each of them is then solved by Neuse and Chandy's Heuristic Aggregation Method. We also developed a much faster appr.
Download or read book Performance Analysis of Optical Burst Switched Networks with Dynamic Simultaneous Link Possession written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Given the current state of the technology, the Optical Burst Switched (OBS) architecture is a practical optical switching solution for the optical networks. In OBS, the user data is transmitted in variable size data units, called bursts, which travel as an optical signal along the entire route. The control information for each burst is transmitted prior to its corresponding burst and it is electronically processed at each hop along the route. The dynamic nature of OBS allows for network adaptability and scalability, which makes it very suitable for the transmission of bursty traffic. In this thesis we study and analyze the performance of OBS networks. We consider the case when the bursts are large enough to simultaneously hold wavelengths on multiple links along the route. Since the size of the bursts varies and the link distance between two adjacent network nodes also varies, a burst may simultaneously occupy wavelengths on a variable number of links as it travels from its source to its destination. As the burst propagates through the network, it dynamically acquires and releases wavelengths from link to link. In this thesis, we propose queueing network models that feature dynamic simultaneous link possession and analyze them in order to obtain the end-to-end burst loss probabilities. This thesis is structured into five parts. In the first part, we describe the Optical Burst Switch architecture and summarize its main design components. In the second part, we define and motivate the simultaneous link possession problem. In the third part, we study an OBS network where the bursts are large enough to simultaneously hold wavelengths on one or two consecutive links. In the fourth part of this thesis, we analytically study an OBS network with simultaneous link possession and a very large number of wavelengths per link. In the fifth part, we address the problem of how to analytically evaluate the performance of OBS networks when the arrival traffic is bursty.
Download or read book Optical Burst Switched Networks written by Jason P. Jue and published by Springer Science & Business Media. This book was released on 2006-06-07 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Next-generation high-speed Internet backbone networks will be required to support a broad range of emerging applications which may not only require significant bandwidth, but may also have strict quality of service (QoS) requirements. Furthermore, the traffic from such applications are expected to be highly bursty in nature. For such traffic, the allocation of static fixed-bandwidth circuits may lead to the over-provisioning of bandwidth resources in order to meet QoS requirements. Optical burst switching (OBS) is a promising new technique which attempts to address the problem of efficiently allocating resources for bursty traffic. In OBS, incoming data is assembled into bursts at the edges of the network, and when the burst is ready to be sent, resources in the network are reserved only for the duration of the burst. The reservation of resources is typically made by an out-of-band one-way control message which precedes the burst by some offset time. By reserving resources only for the duration of the burst, a greater degree of utilization may be achieved in the network. This book provides an overview of optical burst switching. Design and research issues involved in the development of OBS networks are discussed, and approaches to providing QoS in OBS networks are presented. Topics include: - Optical burst switching node and network architectures - Burst assembly - Signaling protocols - Contention resolution - Burst scheduling - Quality of service in OBS networks
Download or read book Packet Loss Reduction in Optical Burst Switched Networks OBS written by Aruna Soule and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sage Russell written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The folder may include clippings, announcements, small exhibition catalogs, advertisements, and other ephemeral items.
Download or read book Traffic and Performance Evaluation for Optical Networks written by Charalampos Mouchos and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The convergence of multiservice heterogeneous networks and ever increasing Internet applications, like peer to peer networking and the increased number of users and services, demand a more efficient bandwidth allocation in optical networks. In this context, new architectures and protocols are needed in conjuction with cost effective quantitative methodologies in order to provide an insight into the performance aspects of the next and future generation Internets. This thesis reports an investigation, based on efficient simulation methodologies, in order to assess existing high performance algorithms and to propose new ones. The analysis of the traffic characteristics of an OC-192 link (9953.28 Mbps) is initially conducted, a requirement due to the discovery of self-similar long-range dependent properties in network traffic, and the suitability of the GE distribution for modelling interarrival times of bursty traffic in short time scales is presented. Consequently, using a heuristic approach, the self-similar properties of the GE/G/∞ are being presented, providing a method to generate self-similar traffic that takes into consideration burstiness in small time scales. A description of the state of the art in optical networking providing a deeper insight into the current technologies, protocols and architectures in the field, which creates the motivation for more research into the promising switching technique of 'Optical Burst Switching' (OBS). An investigation into the performance impact of various burst assembly strategies on an OBS edge node's mean buffer length is conducted. Realistic traffic characteristics are considered based on the analysis of the OC-192 backbone traffic traces. In addition the effect of burstiness in the small time scales on mean assembly time and burst size distribution is investigated. A new Dynamic OBS Offset Allocation Protocol is devised and favourable comparisons are carried out between the proposed OBS protocol and the Just Enough Time (JET) protocol, in terms of mean queue length, blocking and throughput. Finally the research focuses on simulation methodologies employed throughout the thesis using the Graphics Processing Unit (GPU) on a commercial NVidia GeForce 8800 GTX, which was initially designed for gaming computers. Parallel generators of Optical Bursts are implemented and simulated in 'Compute Unified Device Architecture' (CUDA) and compared with simulations run on general-purpose CPU proving the GPU to be a cost-effective platform which can significantly speed-up calculations in order to make simulations of more complex and demanding networks easier to develop.
Download or read book Performance Comparison and Traffic Analysis in Optical Burst switched Networks written by Burak Kantarcı and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Broadband Communications written by Danny H.K. Tsang and published by Springer Science & Business Media. This book was released on 1999-10-31 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadband communications is widely recognized as one of the key technologies for building the next generation global network infrastructure to support ever-increasing multimedia applications. This book contains a collection of timely leading-edge research papers that address some of the important issues of providing such a broadband network infrastructure. Broadband Communications represents the selected proceedings of the Fifth International Conference on Broadband Communications, sponsored by the International Federation for Information Processing (IFIP) and held in Hong Kong in November 1999. The book is organized according to the eighteen technical sessions of the conference. The topics covered include internet services, traffic modeling, internet traffic control, performance evaluation, billing, pricing, admission policy, mobile network protocols, TCP/IP performance, mobile network performance, bandwidth allocation, switching systems, traffic flow control, routing, congestion and admission control, multicast protocols, network management, and quality of service. It will serve as an essential reference for computer scientists and practitioners.
