Abstract
We study the configuration of preconfigured protection cycles (p-cycles) in
survivable WDM optical mesh networks with partial wavelength conversion with 100%
restorability guaranteed against any single failures. We consider the general case
in which a p-cycle is allowed to use converters partially on the path. We formulate
the problem as two integer linear programs, one for nonjoint and one for joint
optimization. In the nonjoint optimization case, working paths are known before the
protection configuration is processed. Then, p-cycles and wavelength converters are
optimally determined. In the joint optimization case, working paths, p-cycles, and
wavelength converters are jointly determined. The objective in both cases is to
minimize the total cost of link capacity used by the working paths and the p-cycles
as well as the cost of wavelength converters required for accommodation of a set of
traffic demands. The proposed p-cycle configuration architectures take full
advantage of converter sharing that reduces the network cost by requiring as few
converters as possible. Our numerical results indicate that the proposed approaches
outperform existing ones in terms of total network cost, total number of converters
required, and maximum number of converters required at a node.
© 2004 Optical Society of America
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Add to BibSonomy