Interference Management Scheme for Co-channel Femtocells

In this paper an adaptive power control for co-channel femtocells in presented. In order to avoid co-channel interference, the femtocells have to sense the presence of macro users in the surrounding environment. Interference is avoided through applying adaptive power control on the femtocell downlink. Also, the femtocells are equipped with a reporting mechanism and they are connected to a coordinator so that this provides direct connections between femtocells. In this scenario, the femtocell has the ability to report any interfering neighboring femtocell with the aid of a coordinator. Moreover, victim femto user at the cell edge can report the interfering femtocell to its serving femtocell or to the macrocell. Results show that the BLER requirements are fulfilled and interference could be reduced through applying the adaptive power control and the proposed reporting scenarios.