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OFC 2015 - Ginis
Access Network Transformation Options for Gbps BroadbandGeorge Ginis ([email protected])Ken Kerpez ([email protected])
March 26th, 2015
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OFC 2015 - Ginis
Outline
Technologies for >100 Mbps Broadband
Vectored VDSLG.now/G.fast
GPON
Wi-Fi’s Role in Enabling New
Broadband Models
Mobile Off-loadingVirtual Broadband
WiFi Sharing
Network Analytics: The Invisible Revolution
Big Data for Broadband
Consumer Tools
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OFC 2015 - Ginis
0
100
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600
700
800
Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3 Q1 Q3
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Subscribers (m
illions)
xDSL Cable FTTH Others Total
Access Technology Trends
80% of FTTH growth is from China
Existing infrastructures (copper, coax) are pushed to deliver higher speeds
Mix of multiple technologies expected to deliver next-generation broadband
Source: Point Topic
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OFC 2015 - Ginis
Vectored VDSL
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OFC 2015 - Ginis
Deployment Scenarios for Vectored VDSL
DSLAM
OLT Optical Backhaul
Fiber‐To‐The‐Node (FTTN)DSLAM installed in street cabinetCopper from node to residence
Fiber‐To‐The‐Basement (FTTB)DSLAM installed in building basementCopper extensions to apartments
DSLAM
Copper Pairs
100-400 copper pairs connected to DSLAM
Copper length up to 1km
<100 copper pairs per node
Copper length of 100-400 meters
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OFC 2015 - Ginis
Vectored VDSL – Technology and Performance
0
20
40
60
80
100
120
140
160
180
200
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5
Dow
nstream Data Ra
te (M
bps)
Loop Length (km)
Profile 30b ("VDSL3")
Profile 17a
0.4 mm cable; -140 dBm/Hz background noise; average data rates
Deployment in progress
TransmissionDiscrete Multi-Tone (DMT)Frequency Division Duplexing“Showtime” adaptationCrosstalk cancellation (vectoring)
Error protectionRS coding and interleavingPHY-layer retransmission
Profile 17a4096 tones 4.3125 kHz tone-spacing
Profile 30b (proposed)8192 tones4.3125 kHz tone-spacing
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OFC 2015 - Ginis
G.now/G.fast
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OFC 2015 - Ginis
Deployment Scenarios for G.now/G.fast
DPUOLT Optical Backhaul
Fiber‐To‐The‐Distribution‐Point (FTTdp)DPU installed at distribution pointCopper drop to residence
Fiber‐To‐The‐BasementDPU installed in building basementShort copper extensions to apartments
DPU
Copper Access
< 100 copper pairs per DPU
Copper length up to 250 meters
Reverse Power Feed
<100 copper pairs per unit
Copper length of 50-250 meters
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OFC 2015 - Ginis
G.now – Technology and Performance
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100
200
300
400
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600
700
0 50 100 150 200 250 300 350
Dow
nstream Data Ra
te (M
bps)
Loop Length (m)
1 line 8 lines 16 linesDeployment started in late 2014
Based on G.hn standard
TransmissionDiscrete Multi-Tone (DMT)Time Division DuplexingFast adaptation
Error protectionLDPC codingPHY-layer retransmission
Current systems2048 tones48.828125 kHz tone spacing100 MHz total bandwidth
0.4 mm cable; DS/US split ratio 80:20; actual rates from field
Source: Marvell
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OFC 2015 - Ginis
G.fast Technology and Performance
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1200
1 2 3 4 5 6 7 8 9 10
Upstream+D
ownstream
Data Ra
te (M
bps)
Line Number
50m 100m 150m 200m
Longer loops
Deployment expected in 2016
TransmissionDiscrete Multi-Tone (DMT)Time Division DuplexingFast Rate AdaptationCrosstalk cancellation (vectoring)Discontinuous operation
Error protectionRS coding and block interleavingPHY-layer retransmission
Current standard2048 tones51.75 kHz tone-spacing106 MHz total bandwidth
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OFC 2015 - Ginis
G.fast Technology and Performance – Future
Standardization started in 2015
New profile (proposed)4096 tones51.75 kHz tone-spacing212 MHz total bandwidth
Crosstalk cancellationChannel with very strong crosstalkLinear and non-linear precoding under study
0
200
400
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1 2 3 4 5 6 7 8 9 10
Data Ra
te (M
bps)
Line Number
50m, 212 MHz, GDFE 50m, 212 MHz, Linear100m, 106 MHz, Linear 200m, 106 MHz, Linear
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OFC 2015 - Ginis
GPON
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OFC 2015 - Ginis
Deployment Scenarios for GPON
OLT Distribution‐Drop
Fiber‐To‐The‐Home/Premises (FTTH/P)Passive components in outside plantFiber drop to residence
Fiber‐To‐The‐BasementDSLAM installed in building basementShort copper extensions to apartments
DSLAM
Splitting ratios 1:16, 1:32, 1:64
Typical two-level splitting
<50 copper pairs per unit
Copper length of 50-250 meters
FeederSplitter
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OFC 2015 - Ginis
GPON Technology and Performance
Feeder Distribution Drop
OLT
2.488 Gbps down at 1490 nm
1.244 Gbps up at 1310 nm
Long range of 10 km to 20 km
TDMA 1 ms slots (typical)OLT assigns time-slots in real-time
Dynamic Bandwidth Allocation for upstream time-slot assignment
Splitter
Splitter
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OFC 2015 - Ginis
Wi-Fi
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OFC 2015 - Ginis
Wi-Fi and Mobile
Cellular Base‐station
Fixed Broadband Connection
WiFi Access Point
Mobile Off-loading
Enabled by: Public hotspots Sharing of private WiFi with dual SSID
Achieves:Reduced traffic on cellular networkWiFi-only mobile
Broadband Boost (Virtual Broadband)
Enabled by: Gateways/devices with fixed and cellular interfacesNetwork-side aggregation servers
Achieves:Broadband speed and quality enhancement
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OFC 2015 - Ginis
Wi-Fi for Bandwidth Sharing
Fixed Broadband Connection
WiFi Access Point
Fixed Broadband Connection
WiFi Access Point
Consumer-side Bandwidth Aggregation
Enabled by:Gateways/devices with multiple WiFi interfacesNetwork-side aggregation serversIP-layer bonding
Achieves: Broadband speed and quality enhancement with no additional infrastructure spending
Example: Three living units in dense environment Each unit uses 100 Mbps Vectored VDSL linkEach device has access to a peak rate of 300 MbpsIndividual services mapped into appropriate QoS levels as provided by the different links
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OFC 2015 - Ginis
Network Analytics
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OFC 2015 - Ginis
Network Intelligence for the Service Provider
MarketingCustomer Support
Field ForceNetwork
Operations
OLT Gateways and Devices
APIs to Service Provider
Interfaces to the network
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OFC 2015 - Ginis
Network Functions
Access
OptimizationAutomatic tuning for maximum performance
DiagnosticsFault type/time/location identification
Service RecommendationsAccurate and per-line service qualification
Contact Center RecommendationsReal-time analysis for determining best action
Field Technician GuidanceReal-time fault reporting and fix verification
Outside Plant Maintenance RecommendationsLoop plant analysis for detection of deterioration
Home Network / WiFi
OptimizationPeriodic WiFi tuning for maximum performance
DiagnosticsPerformance, coverage, congestion and traffic
RecommendationsActions recommended to consumer
User FeedbackConsumer reporting of perceived link quality
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OFC 2015 - Ginis
Information and Control for the Consumer
OLT Gateways and Devices
Consumer interface
Interfaces to the home network
OTT Service Provider
Interfaces to OTT systems
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OFC 2015 - Ginis
Consumer Self-Help
Speed TestWith break-down per segmentSelection of content serverAbility to provide feedback
WiFi AP Location GuidanceSmartphone-based
Full Network ViewInformation on each devicePerformance of each deviceDevice prioritizationList of recommended actions
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OFC 2015 - Ginis
Conclusions
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OFC 2015 - Ginis
Conclusions
Multiple Technologies for
>100 Mbps Broadband
Most suitable technology depends
on the existing infrastructure and the service needs
Wi-Fi Enables New Broadband Models Bringing Together Fixed and Mobile
Wi-Fi-based models for broadband reduce
the need for new infrastructure
spending
Network Analytics are Revolutionizingthe Service Provider
Operations
Optimization, recommendations and consumer self-help are essential
capabilities
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OFC 2015 - Ginis
Thank you
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