DWDM network designs and engineering solutions
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Ortynski and G. Calinescu, O. Frieder and P. Dasylva and R.
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[NEW RELEASES] DWDM Network Designs and Engineering Solutions
Weinstein, Economic modeling for long-haul systems Fourer, D. Gay and B. Gerstel and R. Kennington and E.
Olinick, K. Lewis, A. Optical Networks Magazine 4 a 74— Spiride, Wavelength routing and assignment in a survivable WDM mesh network.
Operations Research 51 b 67— Lee, K. Lee and S. Miyao and H. Mukherjee, D.
Mobile Network Engineering – Connect44 | Mobile and Fixed Network Solutions
Banerjee, S. Ramamurthy and A. Mulvey, R. Sign in. Contact this candidate. Resume: SUMMARY Senior Transmission Network engineer with over fourteen years of experience in small and large telecommunications networks, gathered experience in the field of data transmission and IP Backbone, I've contributed to the design, planning, commissioning, troubleshooting and was involved in solving issues of various network products, network protocols and security.
Issue plans for new services, integrations, expansions. Dimensioning audit for network entities and reporting. With business customers' growing reliance on mission-critical data and the move to hour e-commerce strategies, this alternative is no longer viable. Information-technology IT mangers seek solutions from service providers that allow Escon to be carried in its native format to ensure full-protocol capability and data integrity.
The DWDM network enables service providers to meet the Escon service demand at wire speed today with the capability to upgrade to Ficon when the need arises, without replacing expensive transport equipment. Intersystem coupling at 1. The application for these protocols is mainframe redundancy so that the failure of one computer will not result in downtime. Once again, the deployment of these services across a protocol and bit-rate-independent DWDM network allows the service provider to cost-effectively provide these services across the MAN.
Another data service, Fibre Channel, is used by a host of IT storage devices to backup and restore applications. In this configuration, these protocols offer an efficient, reliable means of interconnecting IP devices. The protocols do not require that data be mapped into fixed bit-rate-intermediary formats before it is transported.
The DWDM network's bit-rate and protocol independence allows the service provider to extend native data-rate Ethernet LANs into MAN applications, while maintaining the capability to migrate from Fast Ethernet to Gigabit Ethernet capabilities through a simple point-and-click network-management interface. The DWDM network, however, will enable service providers to efficiently upgrade these services to higher bit rates i.
Rather than isolating this high-value, time-sensitive traffic on a separate overlay network, service providers need to reduce costs and management complexity by transmitting D1 video at its native date rate.
With a DWDM network, service providers can transmit D1 video and any other protocol at wire speed though a common universal network, thereby attaining economies of scale. In the future, when high-definition television HDTV is deployed at 1. Figure 3 is a simplistic diagram of today's metro transmission network. The crossconnect performs connection management and grooming for the access and interoffice transmission devices located in the office.
It also provides connectivity to local network-processing gear such as routers and ATM switches. The physical architecture of the optical domain is similar in many respects to today's transmission networks, due to the common physical plant and service demand. The access portion of the network requires both a low-end ring and a point-to-point system.
Connectivity and grooming requirements for optically based services will necessitate optical crossconnects for larger offices once critical mass is reached. Open management interfaces are vital to the deployment and utilization of all networks, and DWDM is no exception. Integrated management of the multiple bit-rate- and protocol-independent DWDM environment is accomplished through 3R regeneration, performance monitoring PM , and digital wrappers for fault isolation. Although protocol and bit-rate transparency is a key advantage of metropolitan DWDM networks, photonic transparency can actually make these infrastructures difficult to engineer and turn up.
Engineering a photonically transparent connection requires attention to numerous fiber characteristics such as attenuation, dispersion, noise, nonlinear distortions, and jitter. Similarly, long-haul DWDM systems are point-to-point topologies; all wavelengths have the same endpoints and can be engineered as a group. By definition, each connection in a metro DWDM network can have different endpoints.
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If every connection is photonically transparent, then each one must be engineered separately. This approach defeats one of the key benefits of DWDM networks, which is the ability to rapidly introduce services, including connections with new endpoints. For example, if a transparent connection from point A to point B is rerouted to point A to point C, the system must be re-engineered.
The new connection may require the deployment of an optical amplifier, which in turn will force the re-engineering of other photonically transparent connections also affected by the amplifier. This problem is resolved by deploying photonically transparent subnetworks, the boundaries of which are defined by protocol- and bit-rate-independent 3R regeneration.
Therefore, each subnetwork can be engineered individually and still be interconnected to other subnetworks to create a protocol- and bit-rate-independent network see Fig. Initially, these photonically transparent subnetworks will be the ring and point-to-point transport systems that interconnect subtending devices. As more of these systems are deployed, optical-crossconnect systems will be used to provide flexible and manageable points of interconnection.
These systems must have the ability to provide 3R regeneration for each connection to avoid creating a network where the costs of planning, engineering, and provisioning become prohibitive. At the customer-demarcation point in the network, PM must be invoked to arbitrate service-level agreements.