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I agree that separate DBA domains for 10G and 25G upstream is desirable. In pure 50G greenfield we already have a mechanism—just use US0-A and US0-B (harstead_3ca_1_0917). Marek’s proposal is to extend this capability to the 10G PON brownfield co-existence scenario.
The disadvantages that I see:
From: Marek Hajduczenia [mailto:mxhajduczenia@xxxxxxxxx]
Sent: Thursday, January 04, 2018 4:13 PM
Subject: Re: [802.3_NGEPON] Upstream Wavelength Plan
That might James' opinion. I do not share it. We have enough spectrum to optionally allow WDM coexistence between 25G and 10G systems.
At the end of the day, I personally do not care about new 10G upstream, but only about making both 25G channels equally challenging and limit their dispersion penalty. I do know though that the optional ability to do 10G and 1G upstream separation in today's system is a saving grace in many deployments where these systems are overlapped on the same fiber strand. I do not see any advance of doing the overlap if we can have some separation between these systems
On Thu, Jan 4, 2018 at 2:08 PM, John Johnson <john.johnson@xxxxxxxxxxxx> wrote:
zhang_dezhi_3ca_2a_1117 proposed the principal that different rates in the same PON generation should share spectrum by TDM. I think that this principal should apply to 25G and 10G (using 25G protocol) upstream.
Ed, please add me to your list.
On Thu, Jan 4, 2018 at 3:08 PM, Marek Hajduczenia <mxhajduczenia@xxxxxxxxx> wrote:
Ed et al.,
Here are two versions of what I was suggesting, depending on how we want to stack red 25/10G options
Please include me in the discussion chain.
Per the discussion on today’s call: For anyone interested in joining the small group working to achieve consensus on the upstream wavelength plan, please send me an email.
We have two contributions for consensus-building meeting on January 4, 2018:
- Upstream Wavelength Plan - Ed Harstead
- Upstream Burst Structure – Marek Hajduczenia
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