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Next Generation Access Architecture (NGA2) -Evolution and Convergence –
June 3-4, 2009NGN Forum, Taipei
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EPON & Ethernet Evolution – A Standard Perspective
EPON Evolves to Becoming “Carrier Grade P2MP Ethernet “
Enterprise-grade
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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
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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
Configuration 2 64 16 20%/80% 22118 224GbpsX2 80
Configuration 3 32 32 40%/60% 22118 352GbpsX2 64
Configuration 4 0 48 0%/100% 24576 480GbpsX2 48
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
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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
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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
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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
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LUE and Classificat
ion
EPON MAC
Queuing
Traffic shaping/rate limiting and
discardVLAN Processing
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
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LUE and Classificat
ion
EPON MAC
Queuing
Traffic shaping/rate limiting and
discardVLAN Processing
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
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LUE and Classificat
ion
EPON MAC
Queuing
Traffic shaping/rate limiting and
discardVLAN Processing
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
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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
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802.3ahstandard
completed
Commercial system
interoperabilityachieved
EPON commercialdeployment
1M commercialsubscribers
10M commercialsubscribers
20M 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
1M commercialsubscribers
10M commercialsubscribers
20M commercialsubscribers
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
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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
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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
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•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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