A future cellular network demands a new architecture that can facilitate the autonomous deployment of the infrastructure similar to Wi-Fi. A novel method of deploying a cellular network has been introduced with small cellular base stations, or femtocells, autonomously deployed by users in an underlay macro-cellular network. This autonomous cellular concept allows the network to grow in an organic manner, which reduces the traditional work on infrastructure installation, network configuration and maintenance. To this end, we propose hereafter an intelligent and autonomic system for power control in the femtocell context. The first simulation results seem to confirm the advantage of our solution in reducing energy consumption.