EFFICIENT GROUP DEFINITION AND OVERLOADING FOR MULTIUSER MIMO TRANSMISSIONS

摘要

Certain aspects of the present disclosure present a technique for efficient group definition and overloading for downlink multiuser multiple - input multiple - output (MU-MIMO) transmissions. The disclosure includes a method for wireless communications, comprising: indicating to each apparatus of a plurality of apparatusses, a position of the apparatus in each group of the apparatusses from a plurality of groups for allocating one or more spatial streams; generating a preamble comprising a first field of y bits identifying a group in the plurality of up to 2y groups for receiving simultaneous data transmissions; and transmitting, to the apparatusses, at least a portion of the preamble with the first field preceding the simultaneous data transmissions destined for a set of the apparatusses selected from the group, wherein allocation of one or more spatial streams of the simultaneous data transmissions to each apparatus from the set is specified by the portion of preamble and by the indicated position of that apparatus in the group.