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Re: [10GBT] phy parameter list


I think it would be helpful to have the values from 1000BASE-T preserved on
the spreadsheet as a basis for comparison.



At 05:05 PM 3/26/2004 -0800, Sanjay Kasturia wrote:
>I hope all of you have recovered from the visit to Disney World, from
>the ethernet guitar music and from the wild nights at Pleasure Island.
>While we made good progress in arriving at an agreement on the channel
>models and on the link specification front, I am obliged to point out
>that we will need to reach agreement on a number other critical
>parameters to have a reasonably complete draft 1.0
>I looked through the draft that George Eisler generated by modifying the
>1000BASE-T spec and the large number of TBDs and listed some of the
>important ones in an excel spreadsheet. The spreadsheet is attached and
>I am sure Brad can help us put it on the website so it becomes a living
>document. If there are other critical parameters that should be listed
>in it, please send me email.
>I think participants should start thinking of presentations for the next
>802.3an meeting to make a case for specific values for the parameters
>listed in the spreadsheet.
>I am collecting information on how the selection was made for 1000BASE-T
>and will come up with suggestions on how we can start the process of
>comparing different phy proposals in case there isn't unanimity on all
>the parameter values right from the start!
>Sanjay Kasturia
>Editor, IEEE 802.3an
>cell (650) 704-7686
>office (408) 653-2235
>Item #  Description                             Current proposals
>         PCS
>1       Symbol rate
>2       Modulation
>3       Frame structure
>4       Transmit encoding for FEC
>5       Transmitter bit to symbol mapping
>6       Transmit processing
>7       Transmit latency through PCS
>         PMA
>8       Transmit voltage specification
>9       Transmit pulse shaping
>10      Transmit master and slave jitter specifications
>11      Transmit linearity specifications
>12      Maximum allowable transmit distortion
>13      Transmit noise floor
>14      Transmit latency through PMA
>         Startup protocol
>15      state diagram for training
>16      Coefficient exchange if required
>17      Coefficient initialization if required
>18      Mode selection method if phy operates in multiple modes
>         Receiver performance requirement
>19      BER or FER over specified channel models             10^-12 for
>20      Receiver latency requirement