Abstract: Systems and methods for frame addressing in DL MU-MIMO transmissions are described. In some embodiments, identifier information identifying receiving devices for a frame may be included in a header of that frame. In various embodiments, the identifier information may include a concatenation of respective identifiers for each of the plurality of receiving devices. In some other embodiments, the identifiers may include information identifying a pre-defined device group including several receiving devices. In some embodiments, the frame may include a medium access control (MAC) frame transmitted by an access point/personal basic service set control point (PCP/AP), and the recipient devices may include non-AP/non-PCP stations (STAs). In some such embodiments, a receiving STA address (RA) field or transmitting STA address (TA) field in a MAC header of the MAC frame may be used as a container for the recipient identifier information.