Framework for Implementation of Cognitive Radio Based Ultra-Dense Networks

As the standardization process for the coming 5G networks has entered its final stages, the research activities are ever growing with emphasis on practical deployment scenarios which incorporate many aspects of this family of technologies. Among them are the Ultra-dense network (UDN) and Cognitive Radio (CR) concepts which have both in their own right been objects of intense scientific interest which has yielded many significant accomplishments. Integrating CR functionalities in UDN is a viable solution to the spectrum shortage issue which is ever more critical, especially in such massive deployment scenarios. However, it has only been shallowly explored. This paper expands on the basic approaches for the realization of UDN and CR networks, to present a detailed conceptual scheme for the operation of CR-based nodes operating within the context of UDN along with their relevant functionalities.