Masoumeh Zinali - Department of Computer Engineering and Information Technology Payame Noor University Tehran, Iran
Mohammad Robat Mili - Department of Computer Engineering and Information Technology Payame Noor University Tehran, Iran.
Mehdi Khalili - Department of Computer Engineering and Information Technology Payame Noor University Tehran, Iran.

Femtocell networks are a very promising solution for increasing the system capacity via making the transceiver and transmitter close to each other. This makes links with higher qualities. The spectrum dedicated to the femtocell network is mainly from the spectrum licensed given to macrocell. This paper investigates the maximum of the energy efficiency in Downlink connections of the femtocell networks over a fading environment. To increase the energy efficiency in the femtocell network, optimizing capacity and power are studied at the same time. The power allocation limits and channel capacity increase are considered simultaneously. In this article, it is concluded that simultaneous optimization of the channel capacity increase and power allocation limits leads to an energy efficiency increase in these networks.

femtocell networks , energy efficiency, channel capacity, power allocation, multi-objective optimization