Applying the cycle-oriented approach to multi-domain, multi-service survivable networks

The paper applies the generic Cycleoriented approach to multi-domain, multi-service survivable networks in order to reach a balance between the grade of survivability for the various services to be supported and the efficient use of valuable transport resources in compound, nonhomogenous, networks. We denote gateways as common nodes of two or more domains that allow inter-domain traffic to pass through. As a consequence, gateways are part of the origindestination cycles associated with inter-domain survivable traffic. New route-diverse cycle parts, named Y and X, are defined to derive inter-domain cycles for cases where two gateways are shared between neighboring domains. Transport mechanisms such as Dual-Ring Interchange at gateways and Dual-Node Interchange between gateways can be incorporated to cope with independent multi-failure scenarios by limiting a single failure to its own network domain.