Cognitive capabilities for femtocell networks: Cognitive femtocells

Bayhan S., Gür G., ALAGÖZ F.

Lecture Notes in Electrical Engineering, cilt.116 LNEE, ss.331-355, 2012 (Scopus)

Özet

This chapter introduces the concept of cognitive femtocells and examines how the cognitive capabilities can enhance the operation of femtocells. First, basics of femtocell networks are presented with an emphasis on interference management and resource allocation. The two-layered structure of femtocell networks (i.e. macro and femto layers) and access types (open, closed, and hybrid) are summarized. Next, the potential cognitive capabilities that can be embedded into femtocells are highlighted. In that regard, principal functionalities that can enhance femtocells are listed as follows: spectrum sensing and white space discovery, self-organization, mechanisms for energy-efficient operation, interference mitigation and power control, and traffic prediction. These are not only instrumental in tackling with the major challenges experienced in femtocell networks but are in fact indispensable for efficiency and wide-spread proliferation of femtocells. Moreover, the rationale behind the embracement of cognitive capabilities is articulated. Finally, open research directions that are fundamental for the realization of the cognitive femtocell networks are discussed followed by the concluding remarks. © 2012 Springer Science+Business Media Dordrecht.