RE: [RFC] VHT fields

Hi Simon,

> I'm not very familar with 11ac - but does this information together
> with the packet data give you enough to calculate precisely the
> packet's duration in time? Are there any duration fields, as there are
> in 11n that might be useful?

Haven't tried it, but I think you would have all the required info.

Section 22.3.2 of the 11ac draft has the durations of the training and
signal fields. The duration of VHT-LTF depends on the total number
of space-time streams (NSTS), which you can get from the SU_VHT
and MU_VHT fields.

The radiotap header doesn't contain the data length from the 
VHT-SIG-B field, but I guess you can get that from the packet data
itself. There is a datarate calculation in the Wireshark patch I sent
with the proposal.

Alwin

> 
> Simon