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Re: [802.3_NGEPON] Upstream Wavelength Plan

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:

  • A small DS/US gap for these 25/10 US0-A ONUs—only 25 nm.  I don’t know the penalty, as funada_3ca_1_0117 does not address penalties for gaps this small.  It could be sizable.  Is there a risk that 25 nm gap is not implementable in the traditional 45 degree BOSA?
  • Lose the advantage John has cited with his favored plan, that of not requiring a new wavelength for 10G DMLs (1310 nm DMLs exist). 




From: Marek Hajduczenia [mailto:mxhajduczenia@xxxxxxxxx]
Sent: Thursday, January 04, 2018 4:13 PM
To: STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx
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.


Inline image 1





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.






From: Harstead, Ed (Nokia - US) [mailto:ed.harstead@xxxxxxxxx]
Sent: Thursday, January 4, 2018 12:48 PM
To: STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx
Subject: [802.3_NGEPON] Upstream Wavelength Plan




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.




From: Curtis Knittle [mailto:C.Knittle@xxxxxxxxxxxxx]
Sent: Wednesday, January 03, 2018 4:09 PM
To: STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx
Subject: [802.3_NGEPON] 1/4/18 IEEE 802.3ca (100G-EPON) consensus building meeting agenda



Dear Colleagues,


We have two contributions for consensus-building meeting on January 4, 2018:


  1. Upstream Wavelength Plan - Ed Harstead
  2. Upstream Burst Structure – Marek Hajduczenia


Meeting time is 11:30 – 1:00 Mountain Standard Time. Zoom details are below.





Join from PC, Mac, Linux, iOS or Android:


Or iPhone one-tap :

    US: +16699006833,,804971785#  or +16465588656,,804971785#

Or Telephone

    Dial(for higher quality, dial a number based on your current location)

        US: +1 669 900 6833  or +1 646 558 8656

    Meeting ID: 804 971 785

    International numbers available:


Or an H.323/SIP room system:

    H.323: (US West) (US East) (China) (India) (EMEA) (Australia) (Hong Kong) (Brazil) (Canada)

    Meeting ID: 804 971 785


    SIP: 804971785@xxxxxxxxxxx



Curtis Knittle

VP Wired Technologies – R&D


desk: +1-303-661-3851

mobile: +1-303-589-6869



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