Uplink power control for heterogeneous networks

In heterogeneous networks (HetNet) comprising high power Macro cells and low power small cells, cross-tier interference limits overall capacity with universal frequency reuse. Conventional fractional power control scheme can not effectively deal with interference between Macro cell and small cells. In this paper, we proposed a new uplink power control scheme,which sets the UL SINR target by considering the interference generated to neighboring cells. Furthermore, interference over thermal (IoT) status from neighboring cells is used to adaptively adjust the SINR target in order to avoid snow avalanche effects. Simulation results show that the proposed scheme outperforms traditional fractional power control scheme in terms of both edge performance and average performance.