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 TitleDate AddedCompany
whitepaper WDM/CWDM/DWDM: Segmentation Primer-Maximizing Capacity for Revenue2008-06-01 Motorola
  Node segmentation provides a good tool for cable operators to increase targeted ser1ces, such as EOD, Internet data, and telephony. In many cases, cable operators have limited fibers and/or they could reclaim fibers for emerging opportunities such as commercial services. WDMICWDMIDWDM techniques offer better utilization of the existing fiber resources. Simple WDM techniques can double the fiber capacity, and CWDMIDWDM techniques can Increase the capacity multiple times. Recently, equipment vendors have developed new solutions for multi-wavelength downstream broadcast transport that are more cost-effective and more operationally friendly than what was previously available. Cable operators need to evaluate their requirements and select the best solutions that fit them.

Tags: IT Budgeting, Network Technologies		   
whitepaper Evolution, Challenges and Enabling Technologies for Future WDM-Based Optical Access Networks2008-01-01 Stanford University
  Upgrading current-generation Time Division Multiplexing (TDM)-based optical access networks will be a challenge in the future when end-user demand outgrows current network capacity. Wavelength Division Multiplexing (WDM) has been considered as an ideal solution to extend the capacity of optical networks without drastically changing the fiber infrastructure. This paper investigates key issues and review enabling technologies for upgrading current-generation optical access networks with WDM techniques.

Tags: Network Technologies, LAN - WAN		   
whitepaper Light Trails: A Sub-Wavelength Solution for Optical Networking2008-01-01 Iowa State University
  All-optical networks are able to transport data from source to destination entirely in the optical domain. This is a departure from current optical networks that rely on Optical-Electrical-Optical (OEO) conversion at each intermediate connection node to route data properly. The opacity inherent in traditional networks is costly in terms of the limiting bandwidth and increasing switching complexity. MPLS, OBS and OPS have been proposed as solutions to realizing an all-optical network. MPLS and OBS have the advantages of creating all-optical connections between nodes, but don't allow intermediate nodes to also use the wavelength. Additionally, optical switches are constantly being reconfigured to accommodate new connections. OPS can make switching decisions in the optical domain, but the technology is immature.

Tags: Network Technologies		   
whitepaper Switching and Traffic Grooming in WDM Networks2008-01-01 Massachusetts Institute of Technology
  This paper considers the role of switching in minimizing the number of electronic ports (e.g., SONET ADMs) in an optical network that carries sub-wavelength traffic. Providing nodes with the ability to switch traffic between wavelengths, such as through the use of SONET cross-connects, can reduce the required number of electronic ports. The paper shows that only small switches distributed among the nodes in the ring are needed for significant reductions in the number of ports. The paper characterizes a class of network architectures that use both the minimal amount ADMs and the minimal amount of switching. The paper also gives an algorithm for designing a topology that is efficient in both the required number of electronic ports and the amount of switching used.

Tags: Network Technologies		   
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: LAN - WAN, Network Technologies		   
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: Network Technologies		   
whitepaper Metro Ethernet Gives Danish Service Provider the Power to Deliver Triple Play2007-09-19 Nortel Networks
  To enable EnergiMidt to offer broadband, TV and telephony services for both residential and business customers. A carrier-grade Ethernet infrastructure covering the whole of the region, based on Nortel Optical Metro 5200 in the core and Nortel Metro Ethernet Routing Switch 8600s in all core and aggregation sites. The Nortel Metro Ethernet Services Unit 1800/1850 provides cost effective access for business customers.

Tags: Network Technologies		   
whitepaper Converge IP and DWDM Layers in the Core Network2007-06-01 Cisco Systems
  The Cisco IP over DWDM (IPoDWDM) solution for IP Next-Generation Networks (NGNs) enables the convergence of service providers' IP and DWDM core networks, increasing service flexibility and reliability while lowering Operating Expenses (OpEx) and Capital Expenditures (CapEx). The Cisco IPoDWDM solution efficiently manages traffic growth through the Cisco CRS-1 Carrier Routing System and the Cisco ONS 15454 Multiservice Transport Platform (MSTP).

Tags: Network Management, LAN - WAN		   
whitepaper Evolution Towards Volume Deployable 40-Gbps Networks2007-04-23 Nortel Networks
  Despite the slowdown in the deployment of telecommunication equipment in the early 2000s, the demand for bandwidth hasn't stopped increasing. The explosion of video traffic has dictated new requirements on the network, which for a long time has been carrying voice traffic. This paper discusses the different options available to service providers and network operators to evolve today's 10-Gbps based transport network to higher capacity and highlights the key considerations, pros and cons of each option.

Tags: Network Technologies, Network Technologies		   
whitepaper Leading Research Centre Launches Italy's First Ultra-Broadband Network for Grid Computing2007-02-08 Nortel Networks
  The Consiglio Nazionale delle Ricerche (CNR) company wanted to connect two research centres 80 km apart at ultra-broadband speeds to enable grid computing. Company deployed a highly resilient 10 Gbps LAN network based on the Nortel Ethernet Routing Switch 8600. The Nortel Optical Metro 5200 provides DWDM (Dense Wavelength Division Multiplexing) 10 Gbps channels over fibre, for high-speed connectivity between research centres.

Tags: LAN - WAN, Network Technologies