Abstract
We introduce a novel protection scheme, called cooperative fast protection (CFP),
to fight against a single link failure in survivable(wavelength division multiplexing
(WDM) mesh networks. CFP achieves capacity-efficient fast protection with features of
node-autonomy and failure-independency. Though CFP organizes spare capacity into
pre-cross-connected cycles, it differs from $p$-cycle by reusing the released working
capacity of the disrupted lightpaths (i.e., stubs) in a cooperative manner, and
utilizing both the released stubs and the spare capacity on the cycles to set up backup
paths. This is achieved by allowing all failure-aware nodes to switch traffic upon a
link failure, such that the disrupted lightpaths can be restored even if the end nodes
of the failed link are not on the cycles. CFP also differs from FIPP (Failure
Independent Path Protecting) $p$-cycle by reducing optical recovery time, and not
requiring the cycles to pass through the source nodes of the protected lightpaths. By
jointly optimizing both working and spare capacity placement, we formulate an ILP
(Integer Linear Program) for CFP design without candidate cycle enumeration. Theoretical
analysis and numerical results show that CFP significantly outperforms $p$-cycle based
schemes by achieving faster optical recovery speed with much higher capacity efficiency.
The performance gain is achieved at the expense of higher computation complexity, but
without involving any additional signaling mechanism in the optical domain.
© 2010 IEEE
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