All –
I had a chat with The Chad the other day about items that we both thought needed focus on closing in 802.3da, and thought I’d pass these thoughts along. We are now in the recirculation, and many of us would
very much like to converge the standard to complete the ballot process swiftly. Looking at it though, we also want to have a solid standard. To that end, we were looking at technical issues, and having the task force look at them technically before the meeting
(and during the recirculation) will help. Please feel free to use the reflector to pass on thoughts.
- TCI return loss – we had no consensus to change these on D3.0, but we did have concern and comments to keep the issue open. I expect to be working this,
and I think Stephan Schreiner is also working these issues, but if you have thoughts on it, please weigh in. When I’ve got some analysis done, I will share to the reflector for comment.
- Mixing segment return loss – this is related to the above. It’s my thought that the mixing segment RL doesn’t matter quite so much as the TCI RL (because
there are so many more TCI’s that are reflecting), and really just needs to be calculated. It is possible, thought, that we might consider adjusting the termination impedance of the mixing segment – because resistive impedance really only matters for the
unloaded mixing segment (and nobody cares about an unloaded mixing segment.
- PLCA (and D-PLCA) corner cases – we have a habit of finding last-minute corner cases in these state diagrams, so checking is good. Please don’t add
new features though! We need to converge. We had a couple of comments from Tim rejected because a simulation bug was found. Re-checking, I think we did the right thing there (everything is OK in the diagrams, it was the bug), but it always pays to be sure.
Remember we added that randomization last time to D-PLCA, so that may give us some new cases to check.
- Power state diagram thresholds - We’ve spent a fair amount of effort adjusting power parameters. Those seem to be complete, but some cross-checking
that they all align would be helpful. I seem to recall there was an issue with the TPS (MPoE’s maintain power signature) – perhaps someone can look to make sure that is properly aligned and reasonable.
-george
George Zimmerman, Ph.D.
Technical Editor, IEEE P802.3da Task Force
To unsubscribe from the STDS-802-3-SPMD list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-3-SPMD&A=1
|