Re: [802.3_NGEPON] Upstream Wavelength Plan

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Hi all,

I agree that we don't have enough spectrum and don't need mess up too much with the agreed upstream plan.

Here is what I proposed alternative wavelength plan option based on following reasons:

10G US0 should be left unchanged 1310+/-10nm.
25G US0 can be shifted to 1295nm with 5nm passband for lower dispersion penalty and reuse LR4 wavelength.
25G US0 can be TDM coexistence with 10G US0 for low cost 25G/10G asymmetric ONU
when 2x25 is deployed, US0-B should be reused for 25G US1 since 10G and 50G are none adjacent generation in this case.
50G single wavelength can use 1310nm+/-2.5nm for TDM coexistence with 10G US0 or WDM coexistence with 25G US0.

To Ed,

Please also add my name in the discussion list, Thank you.

BR,

Yong

郭勇 Guo Yong Ph.D

技术预研高级系统工程师 Senior Technology Preresearch System Engineer

FN产品团队 / 有线产品经营部 FN Product Team / Wireline Product Operation Department

上海市张江高科技园碧波路889号中兴通讯

ZTE Corporation, 889 Bibo Rd, Zhangjiang Hi-Tech Park, Shanghai, P.R.China, 201203

T: +86 21 68897116 M: +86 15618880912 E: guo.yong3@xxxxxxxxxx

www.zte.com.cn

原始邮件

发件人： <mxhajduczenia@xxxxxxxxx>;

收件人： <STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx>;

日期：2018年01月05日 21:29

主题：Re: [802.3_NGEPON] Upstream Wavelength Plan

Would this arrangement then be more acceptable? While I do understand that some operators might be more interested in asymmetric systems, at the same time, 10G system side is more forgiving in terms of transmission penalties, so both 25G channels should be as close to each other as possible to make them present as similar penalties as possible to simplify the design of 2x25G optics.

From: Liudekun [mailto:liudekun@xxxxxxxxxx]
Sent: Friday, January 5, 2018 3:16 AM
To: Marek Hajduczenia <mxhajduczenia@xxxxxxxxx>; STDS-802-3-NGEPON@xxxxxxxxxxxxxxxxx; Harstead, Ed (Nokia - US) <ed.harstead@xxxxxxxxx>
Subject: RE: [802..3_NGEPON] Upstream Wavelength Plan

All：

Just a comment on “We have enough spectrum to optionally allow WDM coexistence between 25G and 10G systems”

I don’t think we have ample spectrum which we allow we allocate the wavelength plan casually.

All the wavelength we discussed here are low dispersion O-band, they are very precious spectrum for high speed PONs, including the even higher speed PON systems.

The low dispersion band is very limited, we should use them in an efficient way.

The asymmetric ONUs are always the major volume, so a symmetric OLT are often required to support the asymmetric ONUs ( maybe some operators don’t care 25/10, but there are definitely some other operators quite interesting on 25/10), it will be a big waste to allocate a different wavelength band for asymmetric systems.

To Ed:

I am interesting on the upstream wavelength plan, so please add me in to the discussion email list. Thanks.

Best regards

Dekun Liu

____________________________________________________

Advanced Access Technologies Dept. 网络研究接入技术部

Huawei Technologies Co., Ltd. 华为技术有限公司
Phone: +86 027-59267217 Email: liudekun@xxxxxxxxxx

湖北武汉市关山一路光谷软件园A7-9 邮编：430074
Huawei Technologies Co., Ltd.

A7-9 Wuhan Optical Valley Software Park,Guan Shan Road,Wuhan,Hubei, P.R.China

From: Marek Hajduczenia [mailto:mxhajduczenia@xxxxxxxxx]
Sent: Friday, January 05, 2018 5:13 AM
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:

Marek,

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

Regards,

John

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.

Thanks

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

All,

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: