Inter-domain lightpath provisioning requires some degree of knowledge of topology data, but network operators do not always wish to exchange their full topology, either for security, business, or for scalability reasons.
We present in this article a simulation study on the impact of topology aggregation for multi-domain lightpath provisioning. In particular we focus on the consequences of aggregation in the path finding process. Our work shows that a full mesh representation of the border nodes provides the best results among the various aggregation strategies. Our study uses realistic topologies for hybrid optical networks and this leads to results different from previous studies.
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