Opportunistic scheduling using cognitive radio
Mischa Döhler, Seyed Ali Ghorashi, Mohamed Khalil Ghozzi, Marylin Arndt, Fatin Said, A.H. Aghvami · Comptes Rendus Physique · 2006
Traditional cognitive approaches based on interference scanning discard a certain communication band once interference is detected, irrespective of the temporal characteristics of the interference. The aim of this article is to alert the community that interference exhibits temporal fluctuations, which can be exploited by a cognitive radio in an opportunistic manner. To this end, we present some mathematical approaches that describe the temporal behaviour of interference signals obeying a lognormal shadowing distribution. We derive some key quantities, such as throughput, for an example hierarchical cell structure configuration of a microcell hotspot being operated within a macrocell using the same frequency band.