Resource allocation device and resource allocation method

A resource allocation method executed by a computer, the method comprising:

• a splitting step of splitting requirements related to use of resources of a physical network to which a policy different for each subsection is applied with respect to allocation of the resources, into split requirements for each of the subsections;
• a calculating step of calculating, for each of the subsections, a resource allocation that satisfies the split requirements for the subsection according to the policy applied to the subsection;
• an integrating step of integrating results of the resource allocations by the calculating step, to calculate a plurality of solution candidates for a resource allocation that satisfies the requirements for the physical network;
• an evaluating step of evaluating, for each of the solution candidates, for each of the subsections, a first evaluation value representing a degree to what extent the resource allocation by the solution candidate in the subsection conforms to the policy applied to the subsection;
• and
• a selecting step of calculating a second evaluation value obtained by giving weights to the first evaluation values calculated for the respective subsections for each of the solution candidates according to importance of the policies applied to the respective subsections, and scalarizing the weighted first evaluation values, to select one of the solution candidates based on comparison of the second evaluation values among the solution candidates.