Re: [lp-wan] re-order header field request

["Carles Gomez Montenegro" <[e-mail]>]

Hi Laurent,

> I don't think it is a problem to keep it, in a All 1 Frag, even if we
> don't
> use it (MIC is out of window numbering).  we have alignment on bytes when
> we send a message, so the benefit is not obvious if we don't keep it.

Thanks for your comment.

> But in  ACK message the W bit must be present.

Yes, this is covered by the new feature in -04 whereby all ACKs carry a   
 W bit, which indicates the window being acknowledged.

Cheers,

Carles


> Laurent
>
> On Wed, Jun 21, 2017 at 10:02 AM, Carles Gomez Montenegro <
> [e-mail]> wrote:
>
>> Hi Arun,
>>
>> The point here is that the Rule ID field in fragments except the last
>> one
>> will not use the W bit (or equivalently, have one bit less than the Rule
>> ID field in the last fragment as per current formats).
>>
>> So I'm wondering if this "additional bit" in the Rule ID of the last
>> fragment could have any useful purpose or not, or conversely would just
>> complicate the structure and uniformity of fragmentation headers.
>>
>> Thoughts?
>>
>> Cheers,
>>
>> Carles
>>
>>
>>
>> > Hi Carles,
>> >
>> >  Having the uniform header format seems to be an ideal solution but
>> > Tx'ing additional bit without any significance seems contentious.
>> > Will wait for more feedbacks or comments :)
>> >
>> > thanks,
>> > Arun