Re: Open Request to Del Hanson and David Cunningham: Link Model for 1 0 Gig Ethernet
Jonathan,
I am not sure what will be in this presentation. What are you referring to when
you write "link models"? I will have a presentation that will deal with 10GbE
implementation architectures and support requirements. Is this the same, or
similar, or something different?
Thank you,
Roy Bynum
MCI WorldCom
"HANSON,DEL (HP-SanJose,ex1)" wrote:
> Jonathan,
>
> We would be happy to submit a relatively short presentation describing
> GbE link model refinements needed to deal with likely 10GbE link issues.
> This will be a joint paper which I will present at the York Interim.
> This could be extended further for the November Plenary.
>
> Title: "Gigabit Ethernet Fiber Optic Link Model Refinements Needed
> For Projected 10 Gigabit Ethernet Link Cases", By David Cunningham
> and Del Hanson, Hewlett-Packard Company
>
> Regards,
> Del
>
> -----Original Message-----
> From: Jonathan Thatcher [mailto:jonathan@picolight.com]
> Sent: Wednesday, August 25, 1999 8:40 AM
> To: HSSG_reflector (E-mail)
> Subject: Open Request to Del Hanson and David Cunningham: Link Model for
> 1 0 Gig Ethernet
>
> Del and David,
>
> I would like to request, in behalf of the HSSG, a presentation at the York
> meeting regarding the applicability of the "Gigabit Ethernet Model (i.e.,
> Hanson; Cunningham spreadsheet)" for use in our work on "ten Gig."
>
> This model was extremely helpful to us in 1000BASE-X in discussing
> variations to the specifications and resolving issues. I expect, as with any
> model, that there are certain underlying assumptions which might have to be
> corrected (or at least tuned) for application in 10 Gig. At very least,
> there will be new techniques needed to use it for multilevel encoding, as an
> example.
>
> Some things to consider:
> 1. Use of truely single mode LW lasers (vs multiple longitudinal; single
> transverse mode)
> 1.1 Compensated by adjusting K only?
> 1.2 Chirp?
> 1.2 Measurement of spectral width (rate of drift of "single mode" vs
> characterization of spectra)
> 2. The inherent difference between rise and fall times
> 3. Assumptions about ISI penalty maximums for a link
> 4. Simultaneous support for:
> 4.1 Serial up to 12.5 Gig
> 4.2 Parallel / WDM down to ?
> 4.3 Support of various multi-level schemes
> 4.4 Channel to channel crosstalk issues
> 4.6 Assumptions for SMF and high performance BW MMF
> 5. Replacement of the E/R (per FC proposals)
> 6. The various recommendations made by Petar Pepeligoski (IBM)
>
> Please let me know if this is reasonable or not in the limited timeframe.
>
> Thanks,
>
> jonathan
>
> p.s. As background, I would suggest possible reference to the analysis done
> on this model in the book "Gigabit Ethernet Networking" Macmillan Technical
> Publishing; ISBN: 1-57870-062-0; chapter 9: "The Gigabit Ethernet Optical
> Link Model." :-)
>
> jt
>
> Jonathan Thatcher "jonathan@picolight.com"
> Chair IEEE 802.3 High Speed Study Group
> Vice President Product Marketing, Picolight Incorporated
> 4665 Nautilus Court South, Suite 3, Boulder CO 80301
> Phone: 303-530-3189 X238; Fax: 303-530-4897