LSSP: A novel local segment-shared protection for multi-domain optical mesh networks

This paper investigates the survivability in multi-domain optical mesh networks and presents a new model of multiple failures that is defined that there is one failed link in each single-domain and are multiple failed links in the whole multi-domains. Since the conventional Extended-Path-Shared Protection (EPSP) approach cannot provide 100% protection ability for this model, we propose a novel approach called Local Segment-Shared Protection (LSSP) to provide efficient survivability for this model. In our approach, LSPP first computes one inter-domain primary path for each connection request and follows to compute one intra-domain link-disjoint local segment-backup path for each primary-segment path in each single-domain, respectively, where the backup resources can be shared by different segment-backup paths if the corresponding primary-segment paths are link-disjoint. Compared with the conventional EPSP, although LSSP increases moderate backup resources consumption, it not only can provide 100% protection ability for multiple failures but also can perform much faster recovery time and easier survivable operation and management. The simulation results are shown to be promising.