Power adjustment mechanism using context information for interference mitigation in two-tier heterogeneous networks

This paper deals with the interference issue in a two-tier heterogeneous network. Although the co-channel spectrum allocation provides larger bandwidth for both macrocells and femtocells, the resulting cross-tier interference may prevent macrocell users to achieve the minimum required SINR. Therefore, in this work, we propose a centralized control strategy of downlink interference generated by femtocells to increase the performance requirement of macrocell users. Our mechanism presents two possible power control strategies for interference management which take benefit from some context information on femto and macrocell users positioning. System-level simulations show a better performance in terms of throughput for macrocell users while maintaining a targeted QoS for femtocell users.