User Fairness-Empowered Power Coordination in OFDMA Downlink

Multicell collaboration is considered for power allocation in OFDMA downlink to mitigate the intercell interference. We propose a coordination approach to maximize the sum utility of a cluster of co-channel users by properly configuring user transmit power in local cells. In particular, we employ the well-known $\alpha$-PF metric as the utility function to accounts for the fairness between users in different cells. It is arguably shown that optimization of fairness-oriented utilities in the multicell scenario through intercell coordination effectively mitigates the interference and improves signal transmission. Our work sheds new lights on intercell interference coordination in multicarrier downlink, and leads to a distributed framework for multicell resource coordination.