Patent ID: 9496940
Filing Date: 2016-11-15
CPC Classification: H04B

Claim Text:
1. A method for determining a quality measure of at least one precoding matrix set usable for downlink data transmissions by an interferer base station in a mobile communication system, wherein a mobile terminal is located in the cell of a serving base station and experiences intercell interference from a neighbour cell controlled by the interferer base station, the method comprising the steps of: informing the mobile terminal by the serving base station about the particular precoding matrices in the at least one precoding matrix set usable by the interferer base station, measuring by the mobile terminal the current channel state of the channel between the interferer base station and the mobile terminal, estimating by the mobile terminal the interference from each of the precoding matrices of the at least one precoding matrix set based on the measured current channel state, and determining an interference variability of the at least one precoding matrix set as a quality measure for the at least one precoding matrix set based on the estimated precoding matrix interferences, wherein the step of informing the mobile terminal about the particular precoding matrices in the at least one precoding matrix set: is performed by using messages of the physical layer, the media access control layer or higher layers, and/or informs about weighting information regarding the usage probability of each precoding matrix of the at least one precoding matrix set usable by the interferer base station, and the weighting information is used by the mobile terminal in the step of determining the interference variability of the at least one precoding matrix set.