timestamp
- Bit Number
- 22
- Structure
- u64 timestamp, u16 accuracy, u8 unit/position, u8 flags
- Required Alignment
- 8
- Units
- as defined, as defined, none, none
timestamp
The timestamp itself, in the unit defined in the field itself.
precision
Defines the expected accuracy of the timestamp, in the same units as the
timestamp.
unit/position
| flag |
meaning |
0x000F |
unit - see below |
0x00F0 |
sampling position - see below |
units
| value |
unit |
| 0 |
milliseconds |
| 1 |
microseconds |
| 2 |
nanoseconds |
| 3-15 |
reserved |
sampling positions
| value |
sampling position |
| 0 |
first bit (or symbol containing it) of MPDU - matches TSFT field |
| 1 |
signal acquisition at start of PLCP |
| 2 |
end of PPDU |
| 3 |
end of MPDU (after FCS) |
| 4-14 |
reserved |
| 15 |
unknown or vendor/OOB defined |
flags
0x01 |
32-bit counter (high 32 bits are unused) |
0x02 |
accuracy known |
0xFC |
reserved |