Re: A puzzled maintainer with questions regarding

[Guy Harris <guy () alum mit edu>]

On Feb 17, 2011, at 11:41 PM, M.Baris Demiray wrote:

> > Do they begin with the 16-bit synchronization sequence, or is that stripped off, so that they begin with the header 
> > field?  Do data PDUs include the CRC at the end, or is that stripped off?
>
> 16-bit synchronization sequence is sent over-the-air for all the types
> of DPDUs so it's not stripped off. And for data PDUs, yes, they
> include CRC at the end. So it's like below for data PDUs,
>
> | SYNC | HEADER | HEADER_CRC | DATA | DATA_CRC |
>
> And like below for control frames (namely DPDU types 1, 3, 5, 6, and 15),
>
> | SYNC | HEADER | HEADER_CRC |

OK, so would a complete and accurate description be

        D_PDUs as described by NATO standard STANAG 5066, starting 
with the synchronization sequence, and including both header and data CRCs.

and leave it up to those who can access STANAG 5066 to read it (and possibly provide a link to the old unclassified 
version)?
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