An interference mitigation scheme for LTE based femtocell networks

Femtocells are fully customized deployed base stations. They are being deployed in the macrocell cellular network in order to improve the indoor coverage and provide better user experience. Nevertheless, the randomly deployed femtocell poses a number of challenges, among the most critical is the interference as the achievable data rates and capacity depends mainly on the interference mitigation by the femtocell network. In this study, a self organizing solution combined with power control mechanism is proposed as the interference mitigation scheme for Long Term Evolution (LTE) femtocell network. The notion is based on adjusting the femtocell’s transmission power and based on interference power received at femtocell downlink, in order to reduce the interference between femtocells. The power adjustment is controlled and based on some basic factors such as number of femtocells and distance between the femtocells and subscribers. The performance evaluation of real time services is conducted in terms of Packet Loss Ratio (PLR) and throughput.