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