Method and system for selecting a transmission scheme in a multiple-input-multiple-output wireless communications system

An apparatus comprising:

• a receiver configured to receive a request to transmit a data stream to a destination wireless station;
• a channel state information (CSI) module coupled to the receiver and configured to compute and store CSI and beamforming weighting vectors associated with the destination wireless station;
• and
• a transmission selection module coupled to the CSI module and configured to determine availability of the CSI and a validity characteristic of the beamforming weighting vectors associated with the destination wireless station based on an elapsed time since a previous update of the beamforming weighting vectors, wherein the transmission selection module is configured to select a transmission scheme from a plurality of predetermined transmission schemes based on the availability of the CSI and the validity characteristic of the beamforming weighting vectors.