The Impact of the Number of Add/Drop Ports in Wavelength Routing All-Optical Networks
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ABSTRACT:
The study of wavelength-routing optical networks is an
exciting research topic that has been attracting a lot of
attention recently. For the design and operation of these
networks, it would be important to study the way network
performance is affected by factors such as wavelength
number, wavelength conversion capability and the number
of usable add/drop ports at the optical switches. We study the performance of wavelength-routing all-optical networks with both limited number of link capacities (i.e. wavelengths) and limited number of node add /drop ports (i.e. transmitters and receivers). The analytical models for both virtual wavelength path and wavelength path networks are presented. Based on the simulation and analytical results obtained for various kinds of networks, we have evaluated the impact of the number of add /drop ports in each node. We find that only a limited number of add /drop ports are required in each node to achieve a performance very close to that of a network where each node is equipped with the full number of full-range-tuneable add /drop ports.
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