& cplSiteName &

NG-PON2 Tech: A Done Deal?

Ray Le Maistre
6/25/2012

TWDM-PON appears to have been chosen as the primary technology for the upcoming NG-PON2 fiber access broadband standard, even though the industry body behind the specification's development says a decision has not yet been finalized.

The Full Service Access Network (FSAN) group has been considering a number of options for NG-PON2 -- the next broadband access standard after XG-PON 1 (aka XGPON or 10GPON) -- since 2010. FSAN is an important industry body because it develops optical broadband standards specifications for the International Telecommunication Union, Standardization Sector (ITU-T) Study Group 15 (SG15) to formalize. (See Where's PON Going Next?)

Among the technologies under consideration for NG-PON2, which is expected to deliver the kind of bandwidths that will be required in five years or so, were: WDM-PON; coherent ultra-dense WDM-PON (UDWDM PON); Orthogonal Frequency Division Multiplexing (OFDM) PON; 40Gbit/s TDM PON; and TWDM-PON (TDM/WDM-PON), a hybrid system that stacks four 10GPONs onto a single fiber to deliver 40Gbit/s capacity downstream.

Talk at the FTTH Council Europe event held in Munich this February was that TWDM-PON and UDWDM PON were both under serious consideration. However, industry sources who attended that event suggested that FSAN had already written a specification for NG-PON 2 that called for 40-kilometer reach and 40Gbit/s total capacity, details that seemed to point toward TWDM-PON, which has been backed by Alcatel-Lucent (NYSE: ALU) and Huawei Technologies Co. Ltd.

At the time, though, FSAN told Light Reading that multiple solutions were still under consideration.

Now Huawei has announced that TWDM-PON has been identified by FSAN "as the primary solution for NG-PON2," and that Dr. Yuanqiu Luo, Huawei's top optical access technology expert, has been appointed an editor for physical-layer standards in NG-PON2. (See Huawei Lands NG-PON2 Role.)

Surely, then, it's a done deal?

Not so, says Derek Nesset, a Next Generation PON Task Group co-Chair at FSAN and a lead technology consultant at BT Group plc (NYSE: BT; London: BTA).

In an emailed response to questions from Light Reading, he says FSAN will be "further discussing NG-PON2" at a meeting in Santa Clara that started today "to finalise what to take into ITU for standardisation," with a view to announcing a decision shortly after.

That all points toward TWDM-PON as the favored technology, which is good news for AlcaLu and Huawei. They had pinned their hopes on operators seeking the least disruptive solution, and it seems they called it right: TWDM-PON is regarded as less risky, disruptive and expensive than the alternative solutions, according to a Heavy Reading white paper on NG PONs published earlier this year.

But it's not such good news for Nokia Networks , the main force behind UDWDM PON, which it refers to as its next-generation optical access (NGOA) solution. (See NSN Makes Optical Advances.)

Nor is it positive for those that have been backing pure WDM-PON. (See Ericsson Bulks Up GPON, Adds 40Gbit/s WDM-PON, BBWF 2010: Euro Vendor Joins WDM-PON Fray, ADVA Joins WDM-PON Project and ADVA Unleashes WDM-PON.)

So, no shocks are expected when FSAN makes the official announcement about NG-PON2. What's not known is whether than announcement might herald a new working group, this time for NG-PON3.

— Ray Le Maistre, International Managing Editor, Light Reading

(4)  | 
Comment  | 
Print  | 
Newest First  |  Oldest First  |  Threaded View        ADD A COMMENT
cdcx
cdcx
8/2/2013 | 7:43:14 AM
re: NG-PON2 Tech: A Done Deal?
Not bad news, something is decided will make all thing simple
rhr
rhr
12/5/2012 | 5:28:41 PM
re: NG-PON2 Tech: A Done Deal?
Given the pace at which next-generation PON is moving, it makes sense to adopt a simpler evolutionary path based on TWDM-PON. And yes, it does leave question marks about NSN and its work with startup Skorpios Technologies on UDWDM-PON. But is-TWDM-PON bad news for WDM-PON vendors? WDM-PON will still be needed as will UDWDM-PON ultimately.
Vitor Pelado
Vitor Pelado
12/5/2012 | 5:26:00 PM
re: NG-PON2 Tech: A Done Deal?


According to the latest news from FSAN:


 


"The agreed upon approach is a time and wavelength division multiplexed (TWDM) solution with optional wavelength division multiplexed (WDM) overlay extensions designed for the next generation passive optical network."


So...not so bad news to some vendors after all...


Anyway, a good lesson for those who try to set the standards using press-releases instead of technology!


 


 

digits
digits
12/5/2012 | 5:24:28 PM
re: NG-PON2 Tech: A Done Deal?


The full FSAN announcement can be seen here


http://www.fsan.org/news/


 


As noted by Vitor, the optional WDM overlay extensions provide some flexibility -- it will be interesting to see, at some opint, how that plays out for all the interested  parties.

Featured Video
Upcoming Live Events
November 5, 2019, London, England
November 7, 2019, London, UK
November 14, 2019, Maritim Hotel, Berlin
December 3-5, 2019, Vienna, Austria
December 3, 2019, New York, New York
March 16-18, 2020, Embassy Suites, Denver, Colorado
May 18-20, 2020, Irving Convention Center, Dallas, TX
All Upcoming Live Events