RE: [EFM-P2MP] clarification of grant and report
Dear Ariel-san and Members of P2MP STF,
I got it. I can move forward. Attached describes two different
end-sequences of between bursts. If I understand your point correctly,
Fig 1 in the file would be the correct end-sequence, wouldn't it. This
does make sense. Because, as can be seen in the figure, the inter frame
gap between two bursts still keep over 96nsec, since we have 512nsec of
Laser turn on/off and at least 192nsec of Sync time.
Regards,
Hidekazu
> -----Original Message-----
> From: owner-stds-802-3-efm-p2mp@majordomo.ieee.org
> [mailto:owner-stds-802-3-efm-p2mp@majordomo.ieee.org] On Behalf Of
Ariel
> Maislos
> Sent: Thursday, June 12, 2003 3:22 AM
> To: 'Hidekazu Miyoshi'; stds-802-3-efm-p2mp@ieee.org
> Subject: RE: [EFM-P2MP] clarification of grant and report
>
>
> Miyoshi-san,
>
> Regarding point a), the IPG is a period following the frame
transmission
> that is enforced by the MAC. It does not belong following the burst
preamble
> as you described in one of the options, as it is generated by the MAC
> following frame transmission, and not prior to transmission.
> I believe there was an error inserted in the draft regarding
calculation of
> tail_guard in section 64.2.3.1, and I have inserted an editor's note
to try
> to point it out to the readers.
> Regarding point b) I agree that the OLT needs to allocate enough space
to
> allow for the frame transmission. The frame transmission is not just
the net
> frame, it also includes preamble+IPG, so I think these should be
included in
> the report.
>
> Ariel
>
> Ariel Maislos
> Passave Inc.
> 1557 Jasper Dr.
> Sunnyvale, CA 94087
> ariel.maislos@passave.com
> Tel: (408) 530 0458 Cel: (408) 242 8599
>
>
> -----Original Message-----
> From: owner-stds-802-3-efm-p2mp@majordomo.ieee.org
> [mailto:owner-stds-802-3-efm-p2mp@majordomo.ieee.org] On Behalf Of
Hidekazu
> Miyoshi
> Sent: Monday, June 09, 2003 3:51 AM
> To: stds-802-3-efm-p2mp@ieee.org
>
> Dear Members of P2MP STF,
>
> I am writing this e-mail for clarification of grant and report.
Attached
> is a figure describing a detail of one grant. The points I want to
> clarify are: a) the position of IFG especially in the case of one
frame
> transmission (for instance, sending REGISTER_REQ), and b) definition
of
> Queue Report.
>
> On a), there would be two possibilities. One is inserting IFG before
the
> preamble as indicated in the figure. The other is after transmission.
> The latter seems more legitimate, but in this case, we don't have to
> consider PCS trailer (/T/R/R/) and IFG at the same time (IFC can
include
> /T/R/R/), while we see these two in the RANDOM WAIT state in Figure
> 64-27. Therefore, the position of after transmission does not make
sense
> from the interpretation of the current draft.
>
> On b), queue reports represent bandwidth requirement for upstream.
Thus
> the reports should include frame sizes as well as IFG, preamble, etc.
> Does everyone agree with this definition?
>
> I would like to hear opinions on this issue.
>
> Thanks,
> Hidekazu
>
>
>
Visio-burst_end.pdf