Source-Specific Topology Aggregation for Survivable Multi-Domain Optical Networks

In order to maintain privacy, domain managers are only willing to broadcast limited information regarding its network for the purpose of necessary multi-domain operations. Topology Aggregation (TA) is now widely adopted to aggregate a domain´s detailed topology into an aggregated topology with limited available information. Meanwhile, with the introduction of Shared Risk Link Groups (SRLGs), each of which defines a set of links that fail simultaneously, the TA approach has to consider the presence of SRLGs for generating a more survivable abstracted topology. Exchanging information regarding SRLGs before constructing the TA helps in developing a more survivable aggregated multi-domain network. In this paper, we propose a source domain- specific topology aggregation approach that can help in finding a pair of inter-domain paths with a minimum set of common SRLGs.