Patent ID: 11949479
Assignee: NOKIA TECHNOLOGIES OY
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A computer program product comprising a non-transitory computer-readable medium storing computer program code thereon which when executed by a device causes the device to perform at least:
receiving by a user equipment codebook-based training information from a base station;
selecting, by the user equipment, a best precoder in accordance with said codebook-based training information at least by applying the codebook-based training information by the user equipment to determine an index of a best precoder;
sending, by the user equipment, precoding index reports to the base station, said precoding index reports including said index of said best precoder;
receiving, by the user equipment, beamformed channel state information reference signals from said base station wherein said beamformed channel state information reference signals are based on at least one group that has been selected by aggregating at least two groups of multiple groups based on a total number of indexes in a set of precoding indexes of the multiple groups being larger than a target number, and based on distance between the at least two groups of the multiple groups, wherein the distance is based on a number of precoders of a codebook, and wherein said at least two groups have been aggregated into a single group, and the user equipment is part of the single group; and
sending, by the user equipment, channel state information in accordance with said beamformed channel state information reference signals to said base station.