Patent ID: 9467214
Filing Date: 2016-10-11
CPC Classification: H04B,H04H,H04L,H04W

Claim Text:
1. A method of disseminating channel state information (CSI) coefficients from a first user terminal, each CSI coefficient corresponding to the CSI previously observed by the first user terminal during transmission resource blocks used by a base station to communicate information to a second set comprising at least one user terminal and not including the first user terminal, the method comprising: broadcasting, by the base station, the channel state information (CSI) of each user terminal in the second set of user terminals, on the subset of transmission resources used by the base station to communicate information to each user terminal in the second set; receiving, by the first user terminal, observations of the transmissions of CSI; performing, at first user terminal, eavesdropper channel selection of a subset of CSI coefficients between the base station and the eavesdropping first-user terminal for uplink CSI feedback, the subset chosen out of the set of CSI coefficients between the base station and the first user-terminal on the transmission resources used by the base station to communicate information to each user terminal in the second set, wherein performing eavesdropper channel selection for uplink CSI feedback comprises performing a scheduling decision at the first user terminal by applying a selection algorithm to choose and transmit a fraction of the CSI coefficients based on whether or not the first user terminal is an eavesdropper of sufficient quality for a user terminal in the second set; scheduling the subset of the selected CSI coefficients for uplink transmission; and transmitting the subset of the selected CSI coefficients via the uplink transmission.