Uplink power control for heterogeneous networks

Abstract

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.

Power headroom report-based uplink power control in 3GPP LTE-A HetNet

“…As the aggregated resource usage increases, FUE transmission power is suppressed to maintain the uplink throughput of macro users. In [10], the target received power is controlled based on the interference generated to neighboring cells by exchanging the closed-loop commands under the HetNet environment. The exchange of the interference state between the cells allows the base station to send a power control command to the user equipment (UE).…”