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This paper addresses the cross-tier interference mitigation problem in two-tier OFDMA femtocell networks using power control. We model the objective of power control with utility functions for macrocell and femtocell, respectively. And we discuss the existence of optimal solutions to power control problems. Then a power control algorithm with Differential Evolution (DE) is developed to find the optimal...
This paper addresses the power control problem in two-tier OFDMA femtocell networks to alleviate the cross-tier interference. We model the objective of power control with utility function, and proof the proposed utility function is strictly concave with respect to transmission power. Then a power control algorithm with Particle Swarm Optimization is developed to find the optimal power settings to...
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