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 TitleDate AddedCompany
whitepaper Cascaded Operation of a 2R Burst-Mode Regenerator for Optical Burst Switching Network Transmission2007-11-15 Institute of Electrical and Electronics Engineers
  This paper demonstrates the cascaded operation of an all-optical 2R burst-mode regenerator consisting of a single Mach - Zehnder interferometer, using a loop configuration that introduces a 6-dB power variation on each recirculation of the data. The device is shown to regenerate error-free 10-Gb/s data streams for up to six successive loop recirculations.

Tags: Switching		   
whitepaper Worst-Case Analysis of Dynamic Wavelength Allocation in Optical Networks2007-11-08 University of Hawaii
  This white paper considers Wavelength Division Multiplexed (WDM) optical networks. WDM networks use multiple communication channels over a single optical fiber. The channels are at different wavelengths. These networks support lightpaths, which are end-to-end circuit-switched communication connections that traverse one or more links and use one WDM channel per link.

Tags: Switching, DWDM		   
whitepaper Routing and Wavelength Assignment Methods in Single-Hop All-Optical Networks With Blocking2007-11-05 IBM
  The paper considers single-hop all-optical networks in which wavelength-routed connections (lightpaths) between source-destination pairs are dynamically established and torn down in response to a random pattern of arriving connection requests and connection holding times. A connection request may be blocked if no wavelength is available on a suitable path from source to destination. For these networks the paper considers several methods for routing and wavelength assignment which combine in various ways three main principles: wavelength reservation, protecting threshold and alternate routes. The methods are evaluated and compared in two case studies. In this type of networks the traffic over lightpaths consisting of multiple links is susceptible to high blocking probabilities, which can interfere with the quality of service requirements.

Tags: Network Administration		   
whitepaper Long Reach Passive Optical Networks2007-11-05 Institute of Electrical and Electronics Engineers
  The paper discusses recent progress in the development of optically amplified, long reach passive optical networks, which aim to significantly reduce network complexity and cost by integrating metro and access into a single, all-optical communication system. Fiber-To-The-Premises (FTTP) has been envisaged for a long time as an attractive future access technology for delivering high bandwidths to customers. However, until recently the development and widespread deployment of copper-based broadband solutions such as digital subscriber line and cable modem had slowed down its introduction. Now, demand for new high bandwidth services such as Internet Protocol (IP) television and video on demand, as well as changing competitive and regulatory forces, are beginning to drive the deployment of fiber access networks around the world.

Tags: TDMA - CDMA		   
whitepaper Compressed Network Monitoring for IP and All-Optical Networks2007-10-26 Association for Computing Machinery
  This paper addresses the problem of efficient end-to-end network monitoring of path metrics in communication networks. The goal is to minimize the number of measurements or monitors required to maintain an acceptable estimation accuracy. The paper presents a framework based on diffusion wavelets and non-linear estimation. The procedure involves the development of a diffusion wavelet basis that is adapted to the monitoring problem. This basis exploits spatial and temporal correlations in the measured phenomena to provide a compressible representation of the path metrics. The paper describes heuristic approaches for the selection of the paths that should be monitored, or equivalently, where hardware monitors should be located.

Tags: Monitoring Systems, TCP - IP		   
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 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 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