DYNAMIC PARTIAL PATH-LOSS COMPENSATION-BASED POWER CONTROL TECHNIQUE IN LTE-A FEMTOCELL NETWORKS

With the femtocells being overlaid onto the macrocell in two-tier architecture, that comprises a mixture of both planned and arbitrary deployed nodes. This increases the data rate for indoor environment and fulfils the dream of high speed wireless and mobile broadband services. However, this potential for significant data rate growth could severely be diminished by cross and co-tier interference problem especially in a dense femtocell deployment scenario. In this article, a dynamic power control scheme is proposed to mitigate the downlink interference in order to reduce the outage probability of macro user equipment (MUE), while maintaining good QoS for the home user equipment (HUE). The minimum level of transmit power is constrained to the target Signal to Interference and Noise Ratio of the HUE that satisfy the required Quality of Service of the HUE. The system level simulations confirm that, the proposed power control scheme reduces the outage probability of the nearby MUEs up to 23%, compared to fixed power setting, while maintaining the spectral efficiency of the HUEs.