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 TitleDate AddedCompany
whitepaper Preamble Delaying Label Update Mechanism for Self-Routed Optical Packet Switching Nerks2007-10-15 University of Tokyo
  Optical Packet Switching (OPS) is a promising technology for increasing Internet capacity. It provides advantages of both optical networking and packet switching, such as elimination of Optical-Electrical-Optical (OEO) conversions and efficient link utilization. However, packet switching, which is based on the store-and-forwarding mechanism used in the current Internet, is difficult to apply in OPS, due to functional limitations of optical devices such as optical RAM. RAM is one of the most important devices for providing fundamental functions such as flexible computation and buffering, which are used for queuing, table lookup, and processing complex headers. To build OPS devices using current technology, self-routed optical packet switching has been proposed.

Tags: Switching		   
whitepaper An Algorithm for Traffic Grooming in WDM Optical Mesh Networks With Multiple Objectives2007-10-08 University of Missouri
  This paper studies a traffic grooming in Wavelength-Division Multiplexing (WDM) mesh networks for the SONET/SDH streams requested between node pairs. The traffic could be groomed at the access node before converting to an optical signal carried in the All-Optical network. The paper designs a virtual topology with a given physical topology to satisfy multiple objectives and constraints. The grooming problem of a static demand is considered as an optimization problem. The algorithms found in the literatures focus on a single objective either to maximize the performance or to minimize the cost. The paper proposes a Multi-Objective Evolutionary Algorithm to solve a grooming problem that optimizes multiple objectives all together at the same time.

Tags: DWDM		   
whitepaper Physical Impairments in All-Optical Networks2007-10-07 Ecole Nationale Superieure des Telecommunications
  This white paper proposes an original approach aiming to minimize both CAPEX and OPEX inherent to Electrical Regenerator (ER) placement. Three linear transmission impairments are considered: ASE (Amplified Spontaneous Emission), PMD (Polarization Mode Dispersion) and Intra-Channel crosstalk (ICX). The impact of the gain profile of inline EDFAs is also investigated.   
whitepaper Rohnert Park's Networking Enhances City Life2007-10-05 AT&T Intellectual Property
  Rohnert Park is a city of 43,000 residents in Sonoma County, the heart of California's wine country. Rohnert Park's communications systems were outdated and could not handle the demands of the applications required by police, firefighters, city planners, engineers and other city departments. Downloads were slow, access to critical information could be delayed and users were frustrated. The infrastructure could not support newer bandwidth-intensive applications to make employees more efficient or improve the life of its citizens. The city installed AT&T OPT-E-MAN Switched Ethernet Service to connect its municipal locations and effectively support its business operations. The small IT team has centralized its equipment, streamlined network management and stands ready to rapidly deploy its emergency communications systems as needed.

Tags: Ethernet, Optical Networking, 		  
whitepaper Y-Junction Based Addressing in Optical Symmetric Multiprocessor Networks2007-10-01 University of Arizona
  In a Symmetric MultiProcessor (SMP), every processor has its own cache, and all the processors and memory modules are connected to the central interconnect, which is usually a shared bus. As the processors become faster, the central interconnect architecture of traditional SMP's impedes performance because it cannot keep up with the processors capabilities. As SMP's have hardware-enforced cache coherence, the snoop bandwidth required for address translation becomes the bottleneck. The growing performance gap between the processor speed and the conventional metal interconnection technology provides the impetus to look at optical technology for solutions. The emerging feasibility of optical interconnects is very promising for signal transmission in digital systems with high data rates at the board level and backplane.

Tags: Processors		   
whitepaper 2007 Worldwide Interoperability Demonstration: On-Demand Ethernet Services Across Global Optical Networks2007-09-10 Optical Internetworking Forum
  The 2007 OIF Worldwide Interoperability Demonstration shows end-to-end provisioning of dynamic switched Ethernet services over multiple, control-plane enabled intelligent optical core networks through the use of OIF implementation agreements of UNI 2.0 and E-NNI. In-service Ethernet bandwidth modification and control plane discovery and failure recovery are new features which are demonstrated. Interoperability testing of various network equipment includes MSPP, routers, Ethernet Switches, cross-connects, OADM in the data plane as well as various implementation approaches in the control plane. The multi-vendor aspects of the interoperability testing give carriers confidence that different vendors and technology domains can work together.

Tags: Optical Networking, Switching		   
whitepaper Preconfiguring IP-Over-Optical Networks to Handle Router Failures and Unpredictable Traffic2007-09-08 Lucent Technologies
  This paper considers the realization of traffic-oblivious routing in IP-over-Optical networks where routers are interconnected over a switched optical backbone. The traffic-oblivious routing the paper considers is a scheme where incoming traffic is first distributed in a preset manner to a set of intermediate nodes. The traffic is then routed from the intermediate nodes to the final destination. This splitting of the routing into two phases simplifies network configuration significantly. In implementing this scheme, the first and second phase paths are realized at the optical layer with router packet grooming at a single intermediate node only.

Tags: Switching		   
whitepaper EtherBurst Optical Switch2007-09-01 Matisse Networks
  Service provider and enterprise network engineers share a common challenge. Explosive growth in bandwidth demand is driving the need to scale Ethernet metro packet optical transport networks up to 640 gigabits per second (Gbps), yet Ethernet is limited to 10 Gbps. When scaling packet networks beyond 10 Gbps, there are few choices. Although Ethernet is the interface of choice for metro network architectures, scaling beyond 10 Gbps requires adding another layer of infrastructure and overhead into the network to take advantage of Dense Wavelength Division Multiplexing (DWDM) technology.

Tags: Optical Networking, Switching		   
whitepaper Feasibility of Flow-Based Optical Provisioning in GEANT2007-08-27 Optical Society of America
  Traditionally the difference between telephone and data networks has been quite sharply demarcated. Since a telephone call is characterized by a set up time that is negligible compared with the call duration, it makes sense to allocate it into an end-to-end circuit. On the other hand, data transmission has to be routed on a packet-by-packet basis to be cost effective. Historically, telephone calls were injected into circuits at the edge of the network, while data traffic was sent to an IP router towards a packet switched architecture. Today this natural separation has been blurred by the convergence of many heterogeneous applications into the Internet network.

Tags: TCP - IP, Network Design		   
whitepaper Buy-at-Bulk Network Design With Protection2007-08-07 Columbia University
  This paper considers approximation algorithms for buy-at-bulk network design, with the additional constraint that demand pairs be protected against edge or node failures in the network. In practice, the most popular model used in high speed telecommunication networks for protection against failures, is the so-called 1+1 model. In this model, two edge or node-disjoint paths are provisioned for each demand pair. The paper obtains the first non-trivial approximation algorithms for buy-at-bulk network design in the 1+1 model for both edge and node-disjoint protection requirements. The results are for the single-cable cost model, which is prevalent in optical networks. More specifically, the paper presents a constant-factor approximation for the single-sink case, and an O(log3 n) approximation for the multi-commodity case.

Tags: Network Design		   


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