US Patent No. 10,172,140

METHOD AND RADIO NETWORK FOR MANAGING PRECODER REPORTS


Patent No. 10,172,140
Issue Date January 01, 2019
Title Method And Radio Network For Managing Precoder Reports
Inventorship
Assignee Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)

Claim of US Patent No. 10,172,140

1. A method, performed by a radio network node, for managing precoder reports from a set of user equipments served by the radio network node, wherein each of the precoder reports indicates a precoder selected, by a respective user equipment of the set of user equipments, to be used by the radio network node for transmission to the respective user equipment, wherein the method comprises:receiving, in a first time interval, a first set of precoder reports from the set of user equipments;
receiving, in a second time interval, a second set of precoder reports from the set of user equipments;
determining a first distribution of precoders for the set of user equipments and a second distribution of precoders for the set of user equipments, wherein the precoders in the first distribution are indicated by the first set of precoder reports and the precoders in the second distribution are indicated by the second set of precoder reports, whereby a change in distribution of precoders for the set of user equipments is detected, wherein the change indicates difference in distribution between the first time interval and the second time interval;
for each received precoder report in the first time interval, mapping each respective precoder, indicated by said received precoder report in the first time interval, to a respective direction towards the respective user equipment; and
determining a first average direction for the set of user equipments in the first time interval based on the respective directions; and wherein the method comprises:
for each received precoder report in the second time interval, mapping each respective precoder, indicated by said each received precoder report in the second time interval, to a respective direction towards the respective user equipment; and
determining a second average direction for the set of user equipments in the second time interval based on the respective directions.