Open AccessQualitative analysis for coverage probability and energy efficiency in cognitive‐femtocell networks under macrocell infrastructure
Author(s) -
Ghosh J.,
Dhar Roy S.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.0171
Subject(s) - macrocell , femtocell , cognitive radio , efficient energy use , computer science , computer network , spectral efficiency , context (archaeology) , wireless network , wireless , heterogeneous network , interference (communication) , cognitive network , telecommunications , engineering , base station , channel (broadcasting) , electrical engineering , paleontology , biology
The network coverage and energy efficiency issues in heterogeneous cognitive‐femtocell networks over the macrocell network is studied. Cognitive functions in wireless network nodes are serviceable with the macrocell infrastructure to achieve a balance between two desirable but incompatible features: coverage and energy efficiency. There are two basic but related aspects of cognitive radios (CRs) in the context of wireless communications: optimum CRs for energy efficiency and the act of the functioning of CRs with energy efficiency. To fully utilise the cognitive capability, a dual‐tier network architecture is assumed where both the macrocell and the femtocell have a bearing on the cognitive capability. Owing to the salient features of femtocells, they can improve the coverage and enhance the spectrum efficiency by reutilising the frequency spectrum allocated to the macrocell, although, the resulting intercell interference accompanied by the same frequency coverage cannot be underestimated. The effectiveness of the scheme is verified by extensive Matlab simulation.