[10GBT] Resend
IEEE P802.3an Task Force Members:
I am resending this message which was
sent to the reflector a few weeks ago.
Regards,
Sanjay Kasturia
Editor-in-chief, 802.3an
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As we
work towards making the draft technically complete, I thought it might be useful
to outline some key areas where we have a significant number of TBDs in Draft
1.1; we should plan to adopt baselines at the November Plenary on at
least the first four if not all. This list does not cover all the
TBDs:
1) Full
specification of the transmit frame: The symbol rate and modulation have been
selected (PAM12 at 800MHz); 64/65B framing was adopted; we need a baseline for
the LDPC code and a complete specification of how the data stream coming to the
PHY via the XGMII interface gets mapped to specific PAM12 symbols and the
associated framing around the LDPC blocks. Any proposal for this
should be consistent with prior
motions that were passed by the Task Force and should include
simulation results (or references
to results presented at prior meetings) showing performance of
the LDPC code proposed going below BER of 1E-12 and an analysis of the
undetected error rate.
2) Baseline specification of the THP:
The Task Force approved "A small number of selectable precoders specified by
rational transfer functions." We need a baseline for the number and for each of
the selectable precoders. I recommend
that this include the
numeric precision required
and include simulation results showing the penalty from using an
optimal precoder over a variety of channels.
3) Power
backoff: Number of levels and how they will be selected. Make the proposal as specific as
you can and provide a supporting presentation justifying the proposal at
the upcoming meeting.
4)
Transmit PSD mask and/or associated pulse templates ; make the proposal as specific as you
can. Based on discussion in the meeting so far, I suggest that a
proposal on this should provide some indication of how this affects the
PAR and the system margin. I expect that verification of whether this PSD
will meet FCC/CISPR emission limits will take some
time.
5)
Startup: Method and detailed
state diagrams including values for timers.
We may need Task Force agreement on the basic approach before we lock down
details such as timer values.
Please feel free to comment on the
above list or suggest additional items. The above is not an exhaustive
list.
Regards,
Sanjay Kasturia
Editor-in-chief, 802.3an