Team,
Given that we may not get to an ad-hoc today on
this issue I am requesting written inputs from those of you want to serve on
the ad-hoc to the following questions. I will compile your responses
tonight to take a first stab and suggest we meet tomorrow morning (since we
have open time) after the presentations to finalize this. The
questions address each of the points raised in the letter. Please feel free
to not answerany of the questions if you do not want to. Please
respond by 9 p.m. tonight. I have tied to simplify so you can respond
quickly J
<!--[if !supportLists]-->1.
<!--[endif]-->Your name and affiliation
<!--[if !supportLists]-->2.
<!--[endif]-->Do you in principle support the Chinese
operator request to support TDD in IEEE EPOC: Yes/No
<!--[if !supportLists]-->a.
<!--[endif]-->If yes, state any conditions or caveats
you want to add to the response
<!--[if !supportLists]-->b.
<!--[endif]-->If no please explain reasons for
denying their request
<!--[if !supportLists]-->c.
<!--[endif]-->Cross reference in letter: “To summarize,
we should consider supporting both FDD and TDD modes at the 1 Gbps service
level, which will utilize spectrum below 1 GHz, which is largely amplified.
However, in the expansion toward 10 Gbps service levels, which will utilize
the spectrum above 1 GHz which is largely unamplified, TDD seems like a
reasonable choice.”
<!--[if !supportLists]-->3.
<!--[endif]-->Do you support and see economic benefit in
a harmonization of HiNOC and EPOC, meaning that these two are one and the
same standard? Yes/ No with reasons
<!--[if !supportLists]-->a.
<!--[endif]-->Cross reference in letter “We strongly
believe that harmonization between EPoC and HiNOC would be highly beneficial
to the global industry, as the possibility of having chipsets that support
both EPoC and HiNOC would lower costs for the entire supply chain, right on
up through to the operators. The HiNOC standard is TDMA/TDD, a fact which we
hope will be taken in account in the IEEE”
<!--[if !supportLists]-->4.
<!--[endif]-->Do you agree with the claim in the letter
that for >1 Gbps TDD offers advantages? Yes/No, please give
reasons
<!--[if !supportLists]-->a.
<!--[endif]-->Cross-reference text from letter:
“Moreover, if the cost and complexity of network re-planning is to be
averted, there must be sufficient spectrum up front to match the data rates
on the optical segment. In the case of 10G symmetrical EPON, this would be
1.2 GHz each for upstream and downstream assuming the spectral efficiency
achieved by 4096-QAM – not a realistic assumption. The advantage of TDD in
this case is clear: the ability to flexibly aggregate fragments of spectrum
as they become available.” “To summarize, we should consider supporting both
FDD and TDD modes at the 1 Gbps service level, which will utilize spectrum
below 1 GHz, which is largely amplified. However, in the expansion toward 10
Gbps service levels, which will utilize the spectrum above 1 GHz which is
largely unamplified, TDD seems like a reasonable choice.”
<!--[if !supportLists]-->5.
<!--[endif]-->Given network discrepancies between NA and
China, do you agree with the suggestion in the letter that that EPOC will
need reconditioning of networks on NA and therefore allow for modifications
to support TDD if desired?
<!--[if !supportLists]-->a.
<!--[endif]-->Cross reference text from letter: “In the
existing N+n cable plants of N. America and Europe, there are many
unanswered questions about how the plant will be reconditioned to support
EPoC. Replacement of taps, splitters, amplifiers? In the case that the plant
is not reconditioned, maximum data rates may top out at 1 Gbps, in which
case the use case of EPoC is limited. We believe that only in the context of
multi-Gbps data rates does EPoC make sense, since only then is it future
proofed against the encroachment of FTTH deployments. This almost certainly
implies the deployment of EPoC into N+0 plant, where TDD provides the
maximum flexibility.”
<!--[if !supportLists]-->6.
<!--[endif]-->Any other comments/questions you want to
add to the response (incase my excerpts above do not cover all the key
points we need to respond to).
If more convenient also please feel free to
edit the attached letter and put your ocments and questions using “add
comment” and “track changes” in WORD.
I would greatly appreciate a response by 9 p.m.
tonight.
Thank you !
Rajeev