Abstract
Feature Issue on
Next-Generation WDM Network Design and Routing (WDMN). Future
home and enterprise Internet users need high-bandwidth end-to-end connections that
have to be provisioned automatically and dynamically. We need to make optical-layer
routing as scalable and flexible as IP routing in today's Internet to support
high-end applications. We study the problem of interdomain dynamic wavelength
routing based on a multidomain translucent optical network model, which allows
end-to-end lightpaths to be set up not only across multiple routing domains but also
through two network layers: the optical layer and the regeneration layer. In this
model, a lightpath can traverse the domain boundary either through optical bypass
(OOO) or through optical-electrical-optical regeneration (OEO). We propose an
interdomain dynamic wavelength-routing scheme with modest computational complexity
to address the problem from an algorithmic perspective. Our experimental results
show that the proposed interdomain dynamic wavelength-routing scheme can (a)
flexibly incorporate various cost metrics and local (or intradomain) routing schemes
into a uniform interdomain routing framework, (b) effectively set up end-to-end
lightpaths in a multidomain translucent network, and (c) efficiently use both
optical- and regeneration-layer resources.
© 2003 Optical Society of America
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