Patent ID: 9374199
Filing Date: 2016-06-21
CPC Classification: H04L

Claim Text:
1. A method of transmitting data to user equipments in a communication network, the method comprising: receiving a non-acknowledgement message, comprising a difference of preferred matrix indices information, indicating that a data packet precoded by using a first matrix and transmitted a first time by using a cooperative transmission scheme is not decoded correctly, where the cooperative transmission scheme is performed by a central unit performing a common signal precoding wherein a matrix multiplication is performed of all data signals to be transmitted to all cooperating user equipments with a precoding matrix; determining a second matrix using the preferred matrix indices information; preparing a recoded data packet by precoding the data packet using the second matrix, wherein the second matrix is different from the first matrix, wherein in the preparing of the recoded data packet a scaling factor is taken into account, retransmitting the recoded data packet.