[8023-10GEPON] [FEC Superating] - kickoff preso
Dear All,
I have put together the following presentation on the issue of FEC and
line-rate vs. MAC-rate modification. I tried to include in these slides all
the arguments I have heard favoring one method or the other. If I have
forgotten your favorite, you can shoot an Email to me, and I'll add it to
the list.
You may also note that the last slide, entitled "Reaching a decision" is
blank. I don't know a truly objective way to solve this problem... It seems
to me that when you stack up the pros and cons, these two schemes are pretty
equal.
One last thought: The one 'hard' (objective) con for the super-rating scheme
is the loss of 0.3 dB of sensitivity. The one 'hard' con for the sub-rating
scheme is the loss of bandwidth (7% lost). How can we put these two items
on a common comparative base? Usually, the common denominator in these
situations is cost, so...
What is the relative system cost increase due to 0.3dB optical loss?
What is the relative system cost increase due to a 7% capacity loss?
If someone wants to hazard an answer to these questions, please do.
Regards,
Frank E.
FECsuperatingV1.ppt