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The demand for mobile data has been growing exponentially in these days. Technology vision 2020 for future mobile networks should support up to 1000 times more capacity hence need of 5G / LTE next advanced generation. As these technologies are using various types of cell networks i.e. macro, pico, femto etc. to provide quality of service to the customers, it becomes a hot topic to carry on research. Although these networks provide several benefits for operators and users alike, their massive installations comes with a number of technical challenges in which interference among them is a major problem. In this work, we have presented three power control mechanisms which helps in shifting in femto cell power according to different types of interferences. It has been found that first algorithm can be used when operator decides the fix femto power. The second algorithm considers the femto indoor and outdoor pathloss and assists the femto user to change the power according to maximum available power of femto cell. The third algorithm uses the interference between macro cell and femto user which uses pathloss between femto cell and its macro cell as a negative function which causes reduction in sub-carrier power depending upon its distance from macro cell. It has been observed that three can be used in a combination by femto cell in different neighborhood condition can provide better quality of service.
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