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The time for an all-optical network is already here. The huge capacity of the optical resources, in backbones, distribution and access networks cannot be completely used by current services. The remainders can be used under the deployment of new models for service provisioning. Network virtualization is considered as a serious candidate to enable the flexible provision of services in the future Internet. This paper introduces a framework to enhance network virtualization allocation in optical networks. To increase resources utilization efficiency, a new layer above virtualized elements is introduced to map the demands over the resources and infrastructures. For that layer, a strategy based on a resource squatting model is presented, modeled and analyzed.