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This paper evaluates multi-layer switching architecture vs. all-optical and all-digital switching architectures. Further, the value of incorporating super-channels is evaluated to determine benefit. A real world network model is utilized to quantify and compare results.
Bandwidth efficiency for 100Gb/s WDM and switch architectures are compared in a North American long-haul network. Results show that OTN grooming utilizes fewest WDM wavelengths, and integrated WDM/switch architecture utilizes fewest client service interfaces.
In this paper, we investigate the performance of limited reconfigurable optical networks when multihopping is used. Multihopping is achieved by dropping a wavelength at an intermediate node and transmitting on another wavelength at that node (O-E-O). A route can consist of several such hops each obeying the wavelength continuity constraint individually. Considering that a receiver and a transmitter...
We investigate the blocking performance of all-optical reconfigurable networks with constraints on reconfiguration brought by reconfigurable optical add/drop multiplexers (ROADMs) and tunable transponders. Considering a fully reconfigurable ROADM and limited tunable transponders at each ROADM port, we develop an analytical model to calculate call blocking probability in a network of arbitrary topology...
We compare the performance of various transponder waveband assignment algorithms when multihopping is done by OEO conversions in a limited reconfigurable network. We propose an algorithm to find a multihopped route with minimum OEO conversions.
We propose a heuristic algorithm for the assignment of wavelengths to the transponders at a reconfigurable node in a WDM Network. We show that network performance is improved with our algorithm compared to random assignment.
With increasing packet-based traffic in metro networks, fast reconfigurability is becoming a requirement for optical networks. Since manual reconfiguration could take weeks, carriers are upgrading their SONET/SDH infrastructures with reconfigurable optical add-drop multiplexers (ROADMs) and tunable optical filters. This paper looks at the issue of the impact of reconfigurability on a network's performance.
The blocking performance of limited-reconflgurable all-optical networks is investigated in this paper. Reconfigurability is achieved by reconflgurable optical add-drop multiplexers (ROADMs) and tunable transponders. An analytical model is developed adopting a share-per-node model for the sharing of transponders within a reconfigurable node. The set of wavelengths that can be added/dropped at a reconfigurable...
In this paper, we investigate the blocking performance of all-optical ring and mesh networks with Reconfigurable Optical Add-Drop Multiplexers (ROADMs) and tunable transponders. The ROADMs and transponders together determine the number and set of wavelengths that can be added/dropped leading to a wavelength termination constraint in addition to the well-known wavelength continuity constraint. We develop...
In this paper, we show quantitatively the benefits of using reconfigurable optical add-drop multiplexers (ROADMs) with limited tunable transponders in all-optical networks. We compare two transponder sharing models and two waveband assignment schemes.
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