Controlling CSI reporting in a LTE cellular communication network

摘要

The object of the present invention is to distribute the transmission of the CSI (Channel state information) reports among the different UEs, wherein the CSI reports are based on measurements on cell specific reference signals from the base station. This is achieved in a LTE cellular communication network by controlling the transmission of CSI reports from the UEs.

主权项

1. A method in a base station in a Long Term Evolution, LTE, cellular communication network for controlling Channel State Information, CSI, reports to be sent by a User Equipment, UE, wherein the CSI reports are based on measurements on cell specific reference signals from the base station, the method comprising:
determining an interval/pattern with which the cell specific reference signals should be sent from the base station, determining a parameter dependent on the interval/pattern which is indicative of when the UE should send. CSI reports to distribute CSI reports from different UEs, sending the parameter to the UE, and sending a command to the UE to transmit a CSI report wherein the parameter is a time delay defined from reception at the UE of the command to send the CSI report to the transmission of the CSI report, wherein the parameter that is the time delay is sent to the UE separately from the command to the UE to transmit the CSI report and separately from the cell specific reference signals, and wherein the command to the UE to transmit the CSI report is sent to the UE separately from the cell specific reference signals.