Patent ID: 8824400

Claim:
A method of transmitting data by a multi-user multiple input/multiple output (MU-MIMO) transmitter in a wireless local area network system, the method comprising: generating, by the MU-MIMO transmitter, a physical layer convergence procedure (PLCP) protocol data unit (PPDU), the PPDU including a data field, one or more bundled interface fields corresponding to one or more stations, respectively, and a modulation and coding scheme (MCS) index field corresponding to one of the one or more bundled interface fields; and transmitting, by the MU-MIMO transmitter, the PPDU to one or more stations, wherein each of the one or more bundled interface fields indicates a number of a plurality of spatial streams allocated to a corresponding station, wherein the MCS index field indicates a same MCS index used for modulating and coding all of the plurality of spatial streams indicated by a corresponding bundled interface field, and wherein the data field is modulated and coded by an MCS scheme indicated by the MCS index field and transmitted via plurality of spatial streams indicated by a bundled interface field corresponding to the MCS index field.