A power optimization algorithm for femtocells to suppress the uplink interference in OFDMA system

Femtocell has been considered by the wireless industry as an effective solution not only to improve indoor coverage, but also to offload traffic from the overburdened macrocell networks. In hybrid macro/femto networks, macrocell may have to share the same frequency resource with femtocells, considering the spectrum availability and network infrastructure cost. Sharing the same spectrum may lead severe interference to macrocell users especially when femtocells are densely deployed. In this paper, a decentralized scheme is proposed for the protection of macrocell users´ uplink by reducing femtocell users´ transmission power. Simulation results confirm that the proposed method is feasible and effective.