Dynamic Power Control Mechanism for Femtocells Based on the Frame Utilization

The femtocells are very promising concept for wireless networks to significantly enhance system capacity. Nevertheless, a lot of challenges must be still addressed. The paper focuses on a power control mechanism and proposes a novel approach for dynamic adaptation of transmitting power of femtocell access points. The basic idea is to adapt the transmitting power of femtocells according to current traffic load and signal quality between mobile stations and femtocell in order to fully utilize data frame. The advantage of this approach is its potential to decrease interference to users of macro cell or adjacent femtocells at light traffic load. Performed analytical evaluations of our proposed scheme in comparison to the existing power control mechanisms show that femtocell´s transmitting power can be significantly reduced while the same Quality of Service level is still guaranteed to the femtocell users.