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Interference Management in UMTS Femtocells
femtoforum - In approach, this paper has chosen to look at extreme cases, to complement as far as possible the average, or typical scenarios that RAN4 has already studied in 3GPP. In the main, the analysis has shown up internal contradictions in those extreme cases – meaning that they will never occur. For instance: analysing the case when the UE is operating at full power in its uplink towards a femtocell is shown to occur only when
the macro cell is nearby – in which case the macro downlink signal is so strong that the UE will never select the femtocell over the macrocell. This contradiction shows, for instance, that the high noise rise that a UE could in principle cause will happily never occur.