RE: [10GBASE-T] September interim meeting
Pat,
I agree that the issues you raised must be addressed by November. One of
the biggest challenges for this group is to establish reality on
technical feasibility on Cat7, Cat6 and Cat5e channels. Different
vendors have different conclusion on Technical feasibility. That is due
to assumptions on alien cross talk mitigation techniques, impact on
implementation impairments on SNR, channel model, coding gain, and
analysis on chip complexity in a given process. Assumptions must be
stated clearly by vendors that present technical feasibility. In this
case, technical feasibility drives the broad market potential.
Technical feasibility must be addressed at least based on the following
criteria:
1. Achievable distance on Class D channel with and without installation
mitigation techniques.
2. Achievable distance on Class E channel with and without installation
mitigation techniques.
3. Transceiver complexity in terms of estimated power dissipation and
realistic targets for building blocks like ADC, PLL and etc 2-3 years
from now.
We reached a conclusion that cat7 cable or class F channel has high
enough capacity for 10Gbps operation. But, can a transceiver be
built with reasonable power dissipation and cost say in 90nm process or
finer geometries to achieve broad market potential?
We need to keep in mind that customers have fiber and CX4 as
alternatives.
Nariman
At 01:08 PM 7/30/2003 -0600, pat_thaler@agilent.com wrote:
Bruce,
Generally, when the group can agree on clear
objectives, then they can finish the rest of the work. Fuzzy objectives
often indicate a lack of real concensus.
In November, I will also be expecting arguments
that support the 5 criteria based on the objectives -
especially:
Broad market potential - evidence that there
will be a broad market the minimum requirements of the objectives are
met.
Technical feasibility - is it feasible to meet
those minimum requirements
Economic feasibility - when you have met the
minimum requirements will cost be suitable to make it a viable product in
the markets?
In the discussions at the plenary, a power
consumption issue was raised by some of the speakers.
If the broad market potential is based in part
on use in devices such as end nodes (including servers in data centers),
then an objective for power consumption such that this can reside in
server card formats would be important. Can it fit within the power
constraints of a PCI Express board and an Infiniband board (remembering
that one has to allow some power for the MAC and probably TOE/RDMAP
engine)?
Looking at the objectifves in agenda_1_07_03, I
don't see any that address power consumption or the abilitiy to live on
server card formats. In a quick search, I also didn't find any material
on power consumption in the presentations that have been made to the
study group. I hope that in September the group will address the issue of
power.
Regards,
Pat
- -----Original Message-----
- From: Bruce Tolley
[mailto:btolley@cisco.com]
- Sent: Monday, July 28, 2003 1:22 PM
- To: Booth, Bradley; stds-802-3-10gbt@ieee.org
- Subject: Re: [10GBASE-T] September interim meeting
- Brad:
- Thanks for the follow up.
- I am confident that if we can agree on crisp, clear objectives for 10
Gbps reach and media supported in September that we can get our PAR
approved and move into Task Force mode, which is where the real work
begins.
- Bruce
- At 06:35 PM 7/24/2003 -0700, Booth, Bradley wrote:
- Study Group Members,
- Just to let others that were not at the meeting know the outcome of
the 802.3 Working Group meeting, the Study Group will have to complete
its PAR, 5 Criteria and Objectives in November. This gives the
Study Group the task of completing the PAR, 5 Criteria and Objectives in
4 months. This will make our September Interim meeting extremely
important. We will need to complete the effort as much as possible
to pre-submit to the 802.3 Working Group prior to the November
Plenary. November will permit us the ability to modify the PAR, 5
Criteria and Objectives prior to asking 802.3 to put the PAR on the
NesCom agenda. The September Interim meeting will focus on the
completion of our PAR, 5 Criteria and Objectives.
- Thanks,
- Brad
- Chair, 10GBASE-T Study Group
- Bruce Tolley
- Senior Manager, Emerging Technologies
- Gigabit Systems Business Unit
- Cisco Systems
- 170 West Tasman Drive
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- San Jose, CA 95134-1706
- internet: btolley@cisco.com
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Nariman Yousefi
Vice President Networking Engineering
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