Path geo-diversification: Design and analysis

The path geo-diversification mechanism introduced in this paper takes geographical diversity of physical network topology into consideration when making routing decisions. It enables the network to be more resilient against area-based challenges by exploiting nodes´ multiple ingress and egress ports. It shows better performance compared to OSPF when the network is subject to area-based challenges since the end nodes have access to multiple geographically diverse paths for their communication. We further incorporate geographical diversity into a new graph resilience metric cTGGD (compensated geographical graph diversity). This way we can effectively compare the resilience level of different topologies under regional-based network failures.