Abstract
In generalized multiprotocol label switching (GMPLS)-enabled
wavelength-switched optical networks (WSONs), shared path protection (SPP)
attains 100% survivability with an acceptable recovery time, for lightpaths
affected by a single-link failure. This is achieved by sharing backup
resources. Nevertheless, neither the standard OSPF-TE nor the RSVP-TE
protocols support the respective flooding/collection of shareable resource
information for SPP purposes. This prevents the source node from computing
backup paths exploiting the SPP advantages, and the destination node from
performing optimal wavelength assignment (WA) favoring the reuse of
shareable resources. In this paper, we experimentally evaluate, in the GMPLS
control plane of the ADRENALINE testbed, the performance improvements when
shareable resource information is either flooded (by enhanced OSPF-TE)
and/or collected (by enhanced RSVP-TE), under the wavelength continuity
constraint. Additionally, we propose efficient SPP path computation and WA
algorithms, considering three information dissemination strategies:
aggregated unreserved bandwidth, aggregated shared bandwidth, and
wavelength-channel granularity.
© 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