What the triggered stations are being asked for.
Decides what the trigger-dependent fields at the end of both the common and per-user parts mean, so it has to be read before the frame can be fully parsed.
| Value | Meaning |
|---|---|
| 0 | Basic — send uplink data |
| 1 | Beamforming Report Poll |
| 2 | MU-BAR — send a block ack |
| 3 | MU-RTS — clear the medium |
| 4 | Buffer Status Report Poll |
| 5 | GCR MU-BAR |
| 6 | Bandwidth Query Report Poll |
| 7 | NDP Feedback Report Poll |
Bit values written b0 first, matching transmission order.
Trigger MPDU > Common Info > Trigger Type