Abstract
Path protections have become increasingly important for current mesh optical
networks because fast restorations in generalized multiprotocol label switching
(GMPLS) networks are uncertain. However, setting up additional disjoint paths to
protect connections leads to more path setup blocking and signaling collisions. We
analyze signaling collisions, path blocking and blocking probability, as well as
calculate node-to-node blocking probabilities. A signaling-based path-segment
protection (PSP) is proposed, which integrates segment protections and path
protections as well as enhances the performance of path protections and ring
protections. The setup of PSP connections causes less blocking probability than the
setup of path protection connections in the simulations.
© 2011 Chinese Optics Letters
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