next generation access architecture (nga 2 -evolution and ... v1.pdf · dslam/mdu smb. soho. ftth....

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Next Generation Access Architecture (NGA2) -Evolution and Convergence –

June 3-4, 2009NGN Forum, Taipei

Teknovus Copyright 2009

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EPON & Ethernet Evolution – A Standard Perspective

EPON Evolves to Becoming “Carrier Grade P2MP Ethernet “

Enterprise-grade

2 Teknovus Copyright 2009

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End-to-end Ethernet is the Natural Evolution for a Next Generation Network

OLT802.3x

Ethernet

Optical “Backplane”

ONU

ONU10/100/1,000 Mbps

10/100 Mbps

10/100/1,000 Mbps

Ethernet 10/100/1,000/10,000 Mbps

Subscriber devices are Ethernet-based

Application devices are Ethernet-based EPON: Distributed Ethernet Switch

with an Optical Backplane

+ EPON (20M subscriber) maturity = interoperability, hundreds of 4th/5th-generation products, sophisticated traffic management capabilities

+ 10G EPON = backwards/forwards compatibility and next-generation bandwidth handling


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Access Network Today

Parallel Access Networks w ith Large Metro Backbone

National IP Network

Metro Backbone

GE

AggregationSwitch

2 x GE

GE

GE

VODServ

erTV

Headend

VODContr

ol

3rd Party ISP

VODServ

er

VODServ

er

POP

B-RAS

Router

Internet

EPONEFMEPON

100BaseFX

EPON

GEGE

GE

GE

Mobile backhaul with lease line

Large Biz service

FTTH/MDUResidential service

xDSLResidential service

FTTH/MDUResidential service


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EPON Access Network Evolution – A Network Perspective

EPON Evolves to Becoming “An Unified Access Technology“ & Smaller (or disappearing) Metro Backbone

Edge Core

ProviderRouter

MPLS/IP

ProviderBSR/Edge

Router

OLT as Access Edge:• EPON aggregation• Ethernet Switching and aggregation

High subscriber density and service

diversity

High Switching capacity and TM

capability

3/4G Node

DSLAM/MDU

SMB

SOHO FTTH

Large Biz

Medium Biz1G/2GEPON

10GEPON


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Requirement and Technologies for NGA2

High port density, high split ratioStrong TM, MDU solution

10K to 60K(10X DSL)

10M to 100M(10X DSL)

10GEPONHigh switching capacity, Strong TM

Higher subscriber Density

Increased Subscriber BW

Radius 20km to 30km+(10X DSL) Extended or Long reachLarge Geographical Area

MEF 9/14/18 certificationEPL, EVPL, ELAN support, end-to-end Ethernet

Diverse Services / Ethernet

Frequency sync: +/-100ppb to +/- 50ppbPhase: +/- 5us to +/- 1.25us

1PPS, 8KHz, ToD transport over EPONPWE3 for TDM transport over EPON

Transport of Tight Timing

High reliability, Performance and Fault management

Protection switchingoptical monitoringCarrier Grade

per sub and per Mbps cost, network maintenance and monitoring

Mature standard, mature IOP, strong Eco-system, EPON/GPON convergence

Low OpEx and CapEx

No fork-lift upgrade, backward compatibility, strong technology roadmap

1G/2G/10GEPON and convergence with XG-PON1Investment Protection

Stringent SLA requirement and diverse types of SLAs


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NGA2 OLT capacity Requirement and characteristics

7

OLT Configurations

1G PON ports

10GEPON ports (100%

for MDU)

FTTH (64)/MDU ratio

(256 for 1GEPON, 512 for 10GEPON)

Total subscribers Total Bandwidth to the switching fabric

Total inputs to the switching fabric

Configuration 1 96 0 10%/90% 22732 96GbpsX2 96




EPON significantly expand the geographically coverage

High sub density in domestic cities

Increase the number of subscribers served by OLT by at least a factor of 10

Typical 2 to 4 10GE uplinksSuch OLT will have an

oversubscription ratio between 5:1 to 20:1

Such OLT must be TM enabled to handle service flows and subscriber pipes


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NGA2 OLT capacity Requirement and characteristics

8

ISP

NGA2 OLTMust process service flow and subscriber pipe

ER/BRASMust process IP flow and policy enforcement

IP flow (service

instances)

Service flow

(service Classes)

Subscriber pipe

OLT Configurations

1G PON ports

10GEPON ports (100% for MDU)

FTTH (64)/MDU ratio (256 for 1GEPON, 512 for 10GEPON)

Total subscribers

Number of queues(4 queues per subscriber)

Configuration 1 96 0 10%/90% 22732 90928

Configuration 2 64 16 20%/80% 22118 88472

Configuration 3 32 32 40%/60% 22118 88472

Configuration 4 0 48 0%/100% 24576 98304


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NGA2 OLT As Traffic Management Edge

Service Velocity000’s subscriber

pipes0,000’s service class

flows

Bandwidth Velocitysubscriber

densityper sub

bandwidth

TDM, Voice, Data

00’s Gbps 0’s Gbps

Residential

Business

Mobile

TDM, Voice, Various Data

video, Voice, H/L Data

Service Diversity

OLT as first bandwidth congestion point

Must isolate and protect each subscriber and service class flow

with strong TM

Such scalability requires distributed TM


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NGA2 OLT Design Paradigm - Dumb LC/ Intelligent S C

10

EPON MAC

VLAN Processing

Backplane IF

Backplane IF

TMUplink IFTM

TMTM

Switching fabric

Data HDR

EPON Line Card (LC)

Switch and Uplink Card (SC)

200G to 1T switching capacity

80K to 100K queuesMassively parallel

header processing


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NGA2 OLT Design Paradigm – Dumb LC/ Intelligent SC

11

Chip Description Sample Switchingcapacity

Sample Queuing capacity

24Gbps Ethernet Packet processor

24Gbps2X10G + 24 GEs

Limited

Bandwidth Management engine

20G to 1.2Tbps Manages multiple QueuingEngine chips

Queuing engine N/A Can manage up to 16K queues

16 COS; up to 512MB buffer

Switching engine 40 by 40 cross point switch

Integrated switching and Traffic manager

20G Per flow queuing

Engineers800M

transistors

>100

Development Investment

5 Years

Patents

>40 Processor20MPPS

128K queues

X = +

Use of off-shelf commercial chipset

1) Separate Queuing Engine, BW manager, Switch Fabric chips

2) Expensive solution

Use of in-house purpose built ASIC

1) Not every company can build this technically

2) Huge development effort3) Very Expensive

Clearly neither solution is ideal


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NGA2 OLT Design Paradigm - Intelligent LC/ Dumb SC

12

LUE and Classificat

ion

EPON MAC

Queuing

Traffic shaping/rate limiting and

discardVLAN Processing

Scheduling

Backplane IF

Backplane IF

Uplink IFSwitching

fabric

Data HDR

EPON Line Card (LC)

Switch and Uplink Card (SC)

200G to 1T switching capacity


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Mapping Functions into Designs – 3 Chips

13

LUE and Classificat

ion

EPON MAC

Queuing



Scheduling

Backplane IF

Backplane IF

Data HDR

EPON Line Card (LC)

Packet Memory

Expensive NP or FPGA

QE-2000

Off-shelf TM Chip

Off-shelf 802.3ah

EPON MAC


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Mapping Functions into Designs – 2 Chips

14

LUE and Classificat

ion

EPON MAC

Queuing



Scheduling

Backplane IF

Backplane IF

Data HDR

EPON Line Card (LC)

Packet Memory

Expensive NP or FPGA

Off-shelf 802.3ah EPON MAC with TM


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Mapping Functions into Designs – 1 Chip

15

LUE and Classificat

ion

EPON MAC

Queuing



Scheduling

Backplane IF

Backplane IF

Data HDR

EPON Line Card (LC)

Packet Memory

Single chip – TK3723

Off-shelf 802.3ah EPON MAC with TM & Flexible

VLAN Support


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xPON Evolution: From Fragmentation to Convergence

1.25 Gb/sEPON

ATMBPON

2.5 Gb/sEPON

2.5 Gb/sGPON

10 Gb/sEPON

100% EthernetSeamless Migration

100% EthernetSeamless Migration

New Protocol -Forklift Upgrade?

Or will there be another Forklift upgrade for 10G GPON ?

2.5G is a Differentiator

Disruption of Services & Network Management.

802.3ah EPON

ITU-T GPON

XX

622 Mb/s 1.25 Gb/s 2.5 Gb/s 10Gb/s

Speed

Supp

ort

for

Adv

ance

d Se

rvic

es

16Teknovus Copyright 2009

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EPON Maturity- 10G is 5th-Generation EPON

1st

(1Gbps w/ FE)2nd

(1Gbps w/ GE)4th

(incl.2.5Gbps)

5th

(10Gbps)EPON chipset generations

3rd

EPON solutiongenerations

1st

(1Gbps w/ FE)2nd

(1Gbps w/ GE)4th

(incl.2.5Gbps)

5th

(10Gbps3rd

2nd and 3rd generations were critical period for: adapting to mass market deployment, achieving cost reduction, interoperability, and broad CPE type availability

17

802.3ahstandard

completed

Commercial system

interoperabilityachieved

EPON commercialdeployment

1M commercialsubscribers



200820072006200520042001 2009

IEEE 802.3ah standardcommitteeformed

2003

Commercialchipset IOPachieved

EPON10G standardcomplete, compatible 1G and 2G

10G commercial deployment(planned)

10G standardscommittee formed

36 months

2010


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Time for Convergence ?

802.3ahstandard

completed

Commercial system

interoperabilityachieved

EPON commercialdeployment




200820072006200520042001 2009

IEEE 802.3ah standardcommitteeformed

2003

Commercialchipset IOPachieved

FSAN ratification of GPONstandard

GPON commercialdeployment

Commercial system IOP(planned)

EPON10G standardcomplete, compatible 1G and 2G

10G commercial deployment(planned)

10G standardscommittee formed

36 months

ITU G984 standard

completed

GPON

10G standardscommittee(tbd?)

36 months

18

2010


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Convergence - ITU Proposal to IEEE

Leverage maturity of 10G EPON

Standard

Convergence would allow HW

compatibility with existing,

commercial EPON deployments


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Converged EPON and GPON at 10G Speed

* Frank Effenberger, Huawei, Geneva, Joint ITU-T/IEEE Workshop, June, 2008

Convergence Allows a single solution for a single problem


Consolidated Volume, lower costSame PMD – Same OpticsSame PCS – Same SerDesHarmonized MAC – Same MAC

IC

Separate Management PlaneGPON OMCI can be tunneled in

extensible EPON OAM

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Teknovus Key Carrier Class Technology Roadmap

2008 2011

1/2009 1/2010 1/2011

•Traffic Management•Optical Monitoring•1PPS/8KHz/ToD transport

Speed, Density, Capacity

Carr

ier

Gra

de F

eatu

res

21

•Protection Switching•MEF Compliance•DOCSIS Over EPON•802.1ag/Y.1731 Ethernet OAM•MDU Solution

• 10GEPON • High Density EPON

• 10GEPON and XG-PON Convergence*

* Currently being proposed by ITU-T SG15/Q2 and GPON Vendors. Teknovus is actively participating.


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Teknovus 1G/ 2G/ 10G Product Roadmap

TK4701 10G ONU

TK4702 10G ONU

TK3718 MDU ONU

TK3788 8x OLT

TK4721 10G OLT

TK3714 ONU

TK3715 ONU (China)

TK3723 2x OLT

3 Generations of Silicon in Production

Next Generation EPON Silicon

TK3713 ONU

TK3721 OLTTK3701 ONU

TK3717 ONU

TK3716 ONU

TK2701 Burst SerDes

2006 2007 2008

2009 & 2010

Optical Line Terminal (OLT)

ONU

ONU

ONU

EPON ODN

1G EPON 2.5G EPON

10G EPON


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Thank You


next generation access architecture (nga 2 -evolution and ... v1.pdf · dslam/mdu smb. soho. ftth....

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