Method and apparatus of multi-user selection for multi-user MIMO

A wireless communication device for facilitating wireless communication, comprising processing circuitry configured to cause:

• transmitting a training frame;
• receiving a plurality of feedback frames from a plurality of stations in response to the training frame, wherein each of the plurality of feedback frames is associated with a respective one of the plurality of stations and includes channel quality information for an associated station;
• determining a plurality of groups based on the channel quality information in the plurality of feedback frames, wherein each of the plurality of groups is associated with a respective one of the plurality of stations and includes an associated station as a primary station and at least one secondary station;
• determining channel capacities of the plurality of groups;
• selecting a group of the plurality of groups based on the channel capacities of the plurality of groups;
• determining users of the selected group as MU-MIMO users;
• and
• transmitting a MU PPDU in MU-MIMO for the users of the selected group,
• wherein determining the plurality of groups comprises:
• determining initial effective SNR values for the plurality of modulation schemes based on the channel quality information in the plurality of feedback frames, wherein each of the initial effective SNR values is for a modulation scheme of a station considering interference from another station of the plurality of stations,
• determining recommended modulation and coding scheme (MCS) values and final effective SNR values for the recommended MCS values based on the initial effective SNR values, wherein each of the recommended MCS values is recommended for a station considering interference from another station of the plurality of stations, each of the final effective SNR values is associated with a respective one of the recommended MCS values and an effective SNR for an associated recommended MCS value of a station considering interference from another station of the plurality of stations,
• determining channel capacities of the plurality of groups based on the final effective SNR values, and
• determining a plurality of groups based on the channel capacities of the plurality of groups,
• wherein determining the initial effective SNR values for the plurality of modulation schemes comprises:
• determining average RBIR values for the plurality of modulation schemes based on the channel quality information in the plurality of feedback frames, and
• determining the initial effective SNR values for the plurality of modulation schemes based on the average RBIR values.