Review of G-PON standards and their application. Yupeng (Roc) Xiong Huawei Technologies ITU-T Q2/15 contributor

Transcription

1 FTTH Conference 2010 ITU-T Standardization: from G-PON to 10G XG-PON Review of G-PON standards and their application Yupeng (Roc) Xiong Huawei Technologies ITU-T Q2/15 contributor Lisbon, 25 February 2010

2 Outline Background Core G-PON system standards Ongoing improvements Major applications Lisbon, 25 February

3 Background: Older PON systems ITU-T Q2/15 has a well established program of PON system development 1996: G.982 an early STM-PON 1998: G.983 the ATM-PON system 2001: G.983.3,4,5 the B-PON system B-PON was strongly influenced by the B-ISDN (ATM) network architecture Not so relevant looking forward Optics and microelectronics market changing Explosion of Internet required more bandwidth Lisbon, 25 February

4 Background: Motivations for G-PON In 2001, Q2/15 began G-PON project Key requirements At least 1 Gb/s capacity Full service (including legacy) support Oriented towards IP services Cost effective and FCAPS managable Key non-requirements Compatibility with B-PON not required Lisbon, 25 February

5 Core G-PON requirements (G.984.1) System parameters Rates >1Gb/s A range supported, to permit economical options Efficient use of BW Avoid linecodes DBA supported Environmental OLT indoors ONU indoor or outdoor Protection possible 50ms recovery Service parameters Voice POTS, leased lines, special services Data 10, 100, 1000Base-T Ethernet Other interfaces possible Video IP-video over data path RF-video overlay Lisbon, 25 February

6 Core G-PON PMD layer (G.984.2) The PMD spec provided many options for implementers to find the optimum Downstream rates: 1.2G and 2.5G Upstream rates: 155M, 622M, 1.2G, and 2.5G Loss Budgets: 20, 25, and 30 db Distance 20km physical reach Support for power leveling Makes burst mode reception easier FEC option Loss budget / ONU optics cost down Lisbon, 25 February

7 Core G-PON TC layer (G.984.3) A lightweight system that adapts both ATM and Ethernet to the PON s TDMA nature Downstream frame Bandwidth Map (PCB) to manage the upstream ATM partition to support legacy services GEM partition to support packet services Upstream burst transmission PL-OAM, DBA, and protection included from the begining PMF-TC Downstream P-Frame Interval P-Frame Interval PCBd n Payload n PCBd n+1 Payload n+1 PCBd n+2 T P-Frame = 125 us "Pure" ATM cells Section TDM & Data Fragments over GFP Section N * 53 bytes Lisbon, 25 February

8 Core G-PON management (G.984.4) Just making a data link is not enough for an access system Operators need a full operations support system to provision, monitor, and troubleshoot the access network The ONU Management and Control Interface (OMCI) provides this OMCI was built on B-PON experience Inherited much of the interoperability progress that was made with B-PON systems Lisbon, 25 February

9 Improve: G-PON Lite The first round of G-PON recommendations were ratified in 2004 These served as a basis for early implementers and deployment As the market matured, many of the options included in the first round were found to be extraneous Q2/15 has revised and narrowed the recommendations to reflect the market PHY layer: Rate: 2.5G down, 1.2G up Loss budget: 28 db TC layer: ATM partition dropped Power leveling deprecated Lisbon, 25 February

10 Improve: Ready for XG-PON (G.984.5) Operators expect that G-PON will be widely deployed by the time XG-PON will come It is important that the evolution to XG-PON will be as easy as possible G prepares G-PON for this by Specifying the blocking filter for G-PON ONU Rx s Specifying reduced upstream bands for ONU Tx s X/S 22 db Narrow G-PON 7 db G-PON Wavelength (nm) Reduced G-PON Original G-PON Spectrum Wavelength (nm) Lisbon, 25 February

11 Improve: Reach extenders (G.984.6) The basic PON link is good for 20km This reaches 90% of customers in the US market (a relatively sparse population density) Extending the reach can be one part of a strategy to reach the last 10% G creates the specifications for mid-span reach extenders Total distance: 60km Total loss budget: 56 db ONU UNI UNI ONU R/S R/S ODN S'/R' Mid-Span Extender R'/S' OTL S/R OLT SNI Lisbon, 25 February

12 Improve: OMCI and Interoperability The OMCI is what turns raw bandwidth into billable services G has been constantly improved to add new services and interfaces to the PON system VDSL to enable FTTnode and FTTB MoCA in-home networking IGMP management IPTV support Optical line supervision to reduce Ops costs Interoperability has been a focus of Q2/15, in conjunction with the FSAN Interop group and the Broadband Forum Nine test events so far Nearly perfect plug-and-play results achieved Lisbon, 25 February

13 Standards in Action: Implementation Leading System vendors Major chip vendors Lisbon, 25 February

14 Major Application: Verizon FiOS Small Businesses Office Parks Residential Copper Distribution FTTP Overlay Small Businesses FiOS Available in 16 States & Washington DC 12M HHs Passed YE2008; 18M HHs Passed 2010 BPON Deployment Starting in 2004 GPON Introduced in 4Q FiOS Internet Customers (M) Circuit Switch OLT SAI X 1.6 FDH Copper Feeder FDH New Develop ment FiOS TV Customers (M) FTTP Full Build Q06 1Q07 2Q07 3Q07 4Q07 1Q08 2Q08 3Q Q06 1Q07 2Q07 3Q07 4Q07 1Q08 2Q08 3Q08 Lisbon, 25 February

15 Major Application: Europe Fast emerging GPON market Lisbon, 25 February

16 Worldwide Deployment of G-PON GPON commercial region GPON pre-commercial region Non start Lisbon, 25 February

17 G-PON enables network simplification Backbone CR CR CR CR CR CR 10GE k*10ge k*10ge Service POP BRAS SR MSE BRAS SR VPN PE S-GW MSE AGW Multi-Layer Agg. GE/10GE n*10ge n*10ge Metro Large Capacity AGG SW 5~10Km Access n*ge AN AN 1-3Km AN 1-3Km 1-3Km AN 1-3Km 1-3Km m*ge/10ge 5~10Km Splitter OLT CO PON Extender Splitter OLT CO Splitting 50~100Km 1~3Km Splitter AN AN Splitter 1~3Km 1~3Km 1-3Km 1-3Km 1~3Km Remote area So Far (~2008) Large AN Sites Multi-Layer Structure Medium-Term (2008~2010) OLT Centralized Single-Layer 10GE Aggregation Multi Service GW Convergence Long-Term (2010~2016) PON Extender for Remote Area 3-Layer Network Architecture Fixed-Mobile POP Convergence Lisbon, 25 February

18 Thank You! For more information, contact Frank Effenberger Rapporteur Q2/15 Vice-chair, ATIS COAST-OAN IEEE Comsoc TAOS std. liaison feffenberger<at>huawei.com Lisbon, 25 February 2010