METHOD AND COMPUTER-READABLE MEDIUM TO SELECT A PRECODING BEAM AMONG A SET OF POSSIBLE PRECODING BEAMS

Method and computer-readable medium to select a precoding beam among a set of possible precoding beams is described. This selected precoding beam is use to exchange data between a base station and a user equipment. The possible precoding beams are grouped according to their beamwidth out of a set of possible beamwidths. The method comprises an initial step of selecting one of the possible beamwidths so called selected beamwidth. The method also comprises the following iterative steps; a step of determining measurements associated to precoding beams having this selected beamwidth and a step of selecting the current precoding beam as the one, among the precoding beams having this selected beamwidth, with the best measurements and a step of updating the measurements associated to the precoding beams having the selected beamwidth. Furthermore and if one of the measurement associated to one of the precoding beams, having the selected beamwidth, is above the measurement associated to the current precoding beam, the method comprises a step of changing the current precoding beam to the one with the measurements above the measurements associated to the former current precoding beam and a step of updating a beam switching rate and when the beam switching rate is above a first threshold a step of increasing the selected beamwidth and when the beam switching rate is below a second threshold a step of decreasing the selected beamwidth.