The subfields in the STA Info are described in STA Info subfields. STA Info subfields Field Description AID12 Contains the 12 least significant bits of the AID of a STA expected to process the following VHT NDP and prepare the sounding feedback. Equal to 0 if the STA is an AP, mesh STA or STA that is a member of an IBSS. Feedback Type Indicates the type of feedback requested. Set to 0 for SU. Set to 1 for MU. Nc Index If the Feedback Type field indicates MU, then Nc Index indicates the number of columns, in the Nc, Compressed Beamforming Feedback Matrix subfield minus one: Set to 0 to request = 1 Nc Set to 1 to request = 2 Nc … Set to 7 to request = 8 Nc Reserved if the Feedback Type field indicates SU. Beamforming Report Poll format The Beamforming Report Poll frame is shown in Beamforming Report Poll. Frame Feedback Segment Duration RA TA FCS Control Retransmission Bitmap Octets: 2 2 6 6 1 4 Beamforming Report Poll The Duration field is set as defined in Duration/ID .
The subfields in the STA Info are described in STA Info subfields. STA Info subfields Field Description AID12 Contains the 12 least significant bits of the AID of a STA expected to process the following VHT NDP and prepare the sounding feedback. Equal to 0 if the STA is an AP, mesh STA or STA that is a member of an IBSS. Feedback Type Indicates the type of feedback requested. Set to 0 for SU. Set to 1 for MU. Nc Index If the Feedback Type field indicates MU, then Nc Index indicates the number of columns, Nc, in the Compressed Beamforming Feedback Matrix subfield minus one: Set to 0 to request Nc = 1 Set to 1 to request Nc = 2 … Set to 7 to request Nc = 8 Reserved if the Feedback Type field indicates SU. Beamforming Report Poll format The Beamforming Report Poll frame is shown in Beamforming Report Poll. Frame Control Duration RA TA Feedback Segment Retransmission Bitmap FCS Octets: 2 2 6 6 1 4 Beamforming Report Poll The Duration field is set as defined in Duration/ID .