Hierarchical approach to resource allocation in multitenant transport optical network

Within multitenant optical networks multiple logically isolated virtual networks are working on top of common optical infrastructure that is result of virtualization processes in telecommunications. Virtualization concept brings economic benefits whereas a large number of tenants complicates control over the common physical resources. There are two main control problems related to optical resource control, routing and wavelength assignment and traffic grooming. Offered mathematical model allows to take into account interdependence of the problems and to formulate them as optimization problem aimed at minimization of total power consumption. In order to adapt the model to multitenant optical networks a hierarchical approach which based on separated but coordinated allocation of virtual and physical resources was offered.