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Author: Kee Chaing Chua
Publisher: Springer Science & Business Media
ISBN: 0387476474
Category : Technology & Engineering
Languages : en
Pages : 205
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Book Description
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.
Author: Kee Chaing Chua
Publisher: Springer Science & Business Media
ISBN: 0387476474
Category : Technology & Engineering
Languages : en
Pages : 205
Get Book Here
Book Description
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.
Author: Jason P. Jue
Publisher: Springer Science & Business Media
ISBN: 0387237607
Category : Computers
Languages : en
Pages : 161
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Book Description
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
Author: Kee Chaing Chua
Publisher: Springer
ISBN: 9780387513911
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
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.
Author: Jason P. Jue
Publisher: Springer
ISBN: 9780387503714
Category : Computers
Languages : en
Pages : 147
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Book Description
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
Author: T. Venkatesh
Publisher: Springer Science & Business Media
ISBN: 1441915109
Category : Technology & Engineering
Languages : en
Pages : 272
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Book Description
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.
Author: Klaus Dolzer
Publisher:
ISBN: 9783922403951
Category :
Languages : en
Pages : 141
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Book Description
Author: Qiong Zhang
Publisher:
ISBN:
Category : Computer science
Languages : en
Pages : 288
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Book Description
Author: Javier Aracil
Publisher: Springer Science & Business Media
ISBN: 1848822782
Category : Computers
Languages : en
Pages : 224
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Book Description
This book provides a broad overview of IP over WDM technologies, as seen by a group of experts participating in the e-Photon/ONeC and BONE Networks of Excellence funded within the VIth and VIIth Research Framework Programmes (FP6 and FP7) of the European Union. Both Networks of Excellence are aimed at the integration of research teams active on optical networks at a pan-European level, with the creation of virtual centers of excellence in optical networks, te- nologies, and services. The working groups on optical core networks gathered about a 100 researchers from more than 20 universities and research institutions in Europe. The multifaceted viewpoints available in this community on the current state and future evolution of large WDM networking infrastructures are reported in this book. The book is organized in chapters, with chapter editors, listed on pp–, having the responsibility to collect and harmonize contributions by different - search groups. The whole work was made possible by the coordination efforts of Javier Aracil and Franco Callegati, leaders, at the time when the book writing was begun, of the working groups on optical core networks and on optical burst swit- ing in e-Photon/ONeC. We are thankful to them for their efforts. We hope that this manuscript will serve as a valuable reference for students and practitioners in the ?eld of optical networking.
Author: Hongbo Lui
Publisher:
ISBN:
Category : University of Ottawa theses
Languages : en
Pages : 170
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Book Description
Author: Yuqi Fan
Publisher:
ISBN:
Category : Packet switching (Data transmission)
Languages : en
Pages : 203
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Book Description
The demand of network capacity has been increasing steadily with more users than ever connected to the Internet through broadband access and the popularity of video based applications, such as YouTube. Optical wavelength division multiplexing (WDM) networks are expected to form the next-generation backbone network and to fulfill the insatiable appetite for bandwidth. Wavelength routed WDM optical networks offer the granularity of switching at a fiber, waveband, or a wavelength level. The finest granularity offered is at a wavelength level by provisioning lightpaths for different clients/services. All-optical packet switching is still deemed technically infeasible and its competitiveness as a backbone technology is debatable. Optical burst switching (OBS) presents itself as a promising technology for bridging the gap between optical wavelength switching and optical packet switching. OBS operates at the sub-wavelength level and is designed to improve the bandwidth utilization of wavelengths by exploring statistical multiplexing to deal with bursty traffic, and is therefore more resource efficient than optical wavelength switching. In OBS networks, arriving data packets (e.g., IP packets) are assembled at the ingress OBS nodes to form a data burst. A burst control packet (CP) is sent on a control channel ahead of the data burst to reserve resources and configure the switches along the route traversed by the data burst. In this dissertation, we will explore several important and challenging issues in OBS networks in order to improve the utilization of network resource. To reduce the switching overhead, small bursts may be groomed to reduce resource waste and switching penalty. We have studied the per-hop burst grooming problem where bursts with the same next hop may be groomed together to minimize the number of formed larger bursts and strike a proper balance between burst grooming and grooming cost, assuming all the network nodes have the grooming capability. In order to reduce computation overhead and processing delay incurred at the core nodes, we assume that grooming can only be performed at edge nodes and the core node can send a burst to multiple downstream links, that is, the core node has light-splitting capability. We have attempted to groom small bursts into larger bursts, and select a proper route for each large burst, such that total network resources used and/or wasted for delivering the small bursts is minimized. Optical signal transmission quality is subject to various types of physical impairment introduced by optical fibers, switching equipment, or other network components. The signal degradation due to physical impairment may be significant enough such that the bit-error rate of received signals is unacceptably high at the destination, rendering the signal not usable. Based on earlier work, we have studied scheduling and QoS provisioning problems in OBS networks, taking physical impairments into consideration. In the context of the JET signaling protocol, we have studied the burst scheduling problem and proposed three effective burst scheduling algorithms in OBS networks, taking into account physical impairment effects. Because the offset time of bursts varies in OBS networks, the voids or fragmentation on the channels in the outgoing links can severely degrade the network throughput and blocking probability performance, if not dealt with carefully. A signalling architecture called Dual-header Optical Burst Switching (DOBS) is proposed to reduce the scheduling algorithm complexity. We study the burst scheduling problem and propose an impairment aware scheduling algorithm in DOBS networks. QoS provisioning is an important issue in OBS networks. We have dealt with relative QoS support problem and proposed a QoS provisioning algorithm subject to the physical impairment constraints. A high-priority burst requires a better quality of service in terms of blocking probability, and at the same time, the transmission of the burst should satisfy physical impairment constraints.
