Patent ID: 9094920
Filing Date: 2015-07-28
Classification: H04W

Abstract:
1. A method in a radio communications network for controlling a transmission power of a user equipment transmitting data to a radio base station in the radio communications network, the method comprising: retrieving a target signal-to-interference ratio value in the radio base station; measuring, in the radio base station, a signal-to-interference ratio value of a signal transmitted with a current transmission power from the user equipment; determining whether the user equipment comprises a zooming quantization function; computing a power control command based on the measured signal-to-interference ratio value, the retrieved target signal-to-interference ratio value, and whether the user equipment comprises a zooming quantization function, by applying a model predictive control strategy based on a rolling horizon approach, wherein the power control command indicates a power control adjustment step of the user equipment; transmitting the power control command to the user equipment; calculating a transmission power step in the user equipment based on said received power control command; and adjusting the transmission power of the user equipment by applying the calculated transmission power step to the current transmission power.