Dynamic Fractional Frequency Reuse (FFR) Scheme for Two-Tier Network in LTE

Femtocell networks are a promising solution to enhance the capacity of the LTE networks, especially for the indoor environments. However, unplanned deployment of the femtocells causes the co-tier interference and cross-tier interference. The interference limits the advantages of deploying the femtocell networks. The Fractional Frequency Reuse (FFR) concept is introduced to mitigate the effect of the interference on the system. In this work, Dynamic scheme is proposed to partition the spectrum efficiently. The objective of the proposed scheme is to increase the capacity of the femtocells, which enhances the performance of the system and benefits of fmetocells. The proposed scheme assign less resources for macrocell's part, which has more deployed femtocells in order to reuse as much as possible of the available resources. An experiment is conducted in order to evaluate the proposed scheme. The results indicates that the proposed scheme can increase the capacity of the system.