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DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium1
Feasibility of hybrid FttH solutions
Rob F.M. van den Brink
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium2
Hybrid FttH, what do we mean?
1GBB (up to 1 Mb/s)
2GBB (up to 10 Mb/s)
3GBB (up to 100Mb/s)
4GBB (up to 1 Gb/s)
Voice band modems
ISDN, ADSL1
ADSL2plus
ADSL2
VDSL2FttCAB
FttH
Evolution of telco solutions in offering Broadband
< 6km copper
< 6km copper
< 1km copper
FttH
(C) TNO
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium3
Hybrid FttH, what do we mean?
G.fast
1GBB (up to 1 Mb/s)
2GBB (up to 10 Mb/s)
3GBB (up to 100Mb/s)
4GBB (up to 1 Gb/s)
Voice band modems
ISDN, ADSL1
ADSL2plus
ADSL2
VDSL2FttCAB
FttH
Full
Hybrid
Evolution of telco solutions in offering Broadband
< 6km copper
< 6km copper
< 1km copper
20-200mCurb
Basement
Meter closet
FttH
FttH
(C) TNO
via copper
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium4
• Alternative names:• FttD – Distribution point / Drop wire• FttB – Building• FttC – Curb• FttMDU – Multi Dwelling Unit• ...
• Names in this presentation:• “Hybrid” and “Full” FttH, just multiple flavors of FttH• “G.fast” (ITU name): copper technology to bridge the last 20-200m• “fiber speed”: hundreds of Mb/s to the homes• “4GBB”: a service package consuming 100-1000Mb/s
Hybrid FttH, what do we mean?
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium5
Aims of the 4GBB Consortium
• To solve feasibility questions about Hybrid FttH:• When – Techno economic feasibility• Where – Topology feasibility• How – Technical feasibility (copper + equipment)
• To bring the industry into motion• by initiating standardization in ITU-T• let operators think about requirements• let vendors start developping the technology
4GBB Consortium works on all these topics in parallelsince 2009
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium6
When: Hybrid, when it has clear techno-economic advantages• to save costs for digging/installation by reusing existing copper• to speed-up installation time, so faster roll-out
Where: Hybrid / Full on a case by case basis• appartment buildings, multi-tenant houses, city centers• FttH inside the Home: 80%? – full fiber• FttH upto the Home: 20%? – hybrid fiber
FttH in multiple flavors: “full” and “hybrid”
Solving feasibility questions
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium7
By using a new DSL technology, up to 1 Gb/sè “G.fast”
• How: hybrid = reusing existing wiring (only when attractive)• via basement, wall-boxes (house front), footway boxes (curb), etc.• up to 1 Gb/s, via the last 20-200m existing copper• via single or double wire-pairs (bonding doubles the bitrate)• reverse power feeding when needed (from CPE side)
Solving feasibility questions
4GBB (up to 1 Gb/s)
FttH
Full
HybridCurb
Basement
Meter closet
FttH
FttH
(C) TNO
20-200mG.fast
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium8
Solving Q1: techno-economic feasibility (“when”)
• Techno-Economic Drivers:• Cable solutions (DOCSIS) are fierce competitors • Investments for Full FttH are high à too high? à Churn?• Installation times for Full FttH are long à too long? à Churn?
• Techno-Economic Opportunities:• Hybrid FttH may reduce costs • Hybrid FttH may speed-up deployment • Both can increase market share
To quantify this, we need a calculation modelfor comparing Hybrid with Full FttH
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium9
BerekeningKostenCost model
Solving Q1: techno-economic feasibility (“when”) Creation of a calculation model
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium10
Revenue model
BerekeningKosten
Output
Cost model
Solving Q1: techno-economic feasibility (“when”) Creation of a calculation model
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium11
NPV
Digging costs
Hardware costs
Subscribers / tech/ year
Churn/ technology/ year
Households
Fiber cable length saving
input repository
network model
outputcalculationsubmodel
Conn’s/tech/year
Cost/conn/tech/year
network cost submodel
Revenue/sub/tech/year
Subs/tech/year
Rollout speed
HP à HC
Households
connectionssubmodel
Revenue/sub/tech
Takeover sum / sub
Scaling
subscribersubmodel
revenuesubmodel
footprintmodel
additionalnetwork
investment
additionalrevenues
ratio HP:HC
WACC
BerekeningOpbrengsten
Input Output
Revenue model
Solving Q1: techno-economic feasibility (“when”) Creation of a calculation model
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium12
NPV
Digging costs
Hardware costs
Subscribers / tech/ year
Churn/ technology/ year
Households
Fiber cable length saving
input repository
network model
outputcalculationsubmodel
Conn’s/tech/year
Cost/conn/tech/year
network cost submodel
Revenue/sub/tech/year
Subs/tech/year
Rollout speed
HP à HC
Households
connectionssubmodel
Revenue/sub/tech
Takeover sum / sub
Scaling
subscribersubmodel
revenuesubmodel
footprintmodel
additionalnetwork
investment
additionalrevenues
ratio HP:HC
WACC
Input Output
Solving Q1: techno-economic feasibility (“when”) Creation of a calculation model
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium13
NPV
Digging costs
Hardware costs
Subscribers / tech/ year
Churn/ technology/ year
Households
Fiber cable length saving
input repository
network model
outputcalculationsubmodel
Conn’s/tech/year
Cost/conn/tech/year
network cost submodel
Revenue/sub/tech/year
Subs/tech/year
Rollout speed
HP à HC
Households
connectionssubmodel
Revenue/sub/tech
Takeover sum / sub
Scaling
subscribersubmodel
revenuesubmodel
footprintmodel
additionalnetwork
investment
additionalrevenues
ratio HP:HC
WACC
Input
à Interestà Risk of investment
Input
Solving Q1: techno-economic feasibility (“when”) Creation of a calculation model
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium14
NPV
Digging costs
Hardware costs
Subscribers / tech/ year
Churn/ technology/ year
Households
Fiber cable length saving
input repository
network model
outputcalculationsubmodel
Conn’s/tech/year
Cost/conn/tech/year
network cost submodel
Revenue/sub/tech/year
Subs/tech/year
Rollout speed
HP à HC
Households
connectionssubmodel
Revenue/sub/tech
Takeover sum / sub
Scaling
subscribersubmodel
revenuesubmodel
footprintmodel
additionalnetwork
investment
additionalrevenues
ratio HP:HC
WACC
à Interestà Risk of investment
Solving Q1: techno-economic feasibility (“when”) Creation of a calculation model
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium15
Solving Q2: topology feasibility (“where”)
• Questions:• How many locations are suitable (and where)• What are their copper length• How often can we use a double wire pair?
• Answers :• country-specific
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium16
Solving Q2: topology feasibility (“where”)
Sample of dropwire lengths
0
0.05
0.1
0.15
0.2
0 20 40 60 80 100
drop length x (m)
Frac
tion
(x)
• Some answers for the UK Network:
Sample drop wire lengths, taken from ETSI TR 102 629 (Reverse Power Feed for Remote Nodes)
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium17
A typical Dutch city
Bold markers denote 80-100% has a double wire pair
>70% in this city (example)
Solving Q2: topology feasibility (“where”)
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium18
• Develop measurement methodsq create setups up to 500MHz (TNO, TID, BT, EAB)q verify these setups via a Round Robin Testq facilities to measure impulse noise and RFI
• Do a lot of measurementsq twisted pair cablingq irregularities, like splices, manipulation boxes, etc.q all kinds of ingress noise measurement
• Develop simulation modelsq two-port models for single-pair cable transmissionq multi-port models for harmonized cable transmission (vectoring)q statistic descriptions of impulse noise
• Do simulationsq define meaningful scenario’sq predict performance and throughput
Solving Q3: Technical feasibility (“how”)Characterizing copper cables up to 500 MHz
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium19
Measurement setup up to 500MHz
Solving Q3: Technical feasibility, cable measurements
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium20
0 50M 100M 150M 200M 250M 300M 350M 400M 450M 500M-80
-60
-40
-20
0
[Hz]
[dB]
Balanced Transmission - (CAT5, 10-61-232m, Shielded)
(c) TNO 2010
dif f erential mode
1k 10k 100k 1M 10M 100M 1G-80
-60
-40
-20
0
[Hz]
[dB]
Balanced Transmission - (CAT5, 10-61-232m, Shielded)
(c) TNO 2010
dif f erential mode
Balanced Transmission:
5.7 dB / 100m @ 10MHz18.6 dB / 100m @ 100MHz
Solving Q3: Technical feasibility, cable measurementsCharacterizing copper cables: example up to 500 MHz
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium21
Solving Q3: Technical feasibility, cable measurementsCharacterizing splices and manipulation boxes
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium22
cable splice cable manipulation box
in-house wiring
Solving Q3: Technical feasibility, cable measurementsCharacterizing splices and manipulation boxes
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium23
Solving Q3: Technical feasibility, more questions
• How about Noiseq impulse noise, RFI
• How about attainable bitrateq modeling, simulationsq next presentation à squeezing Gbit/s through copper
• How about line coding, modulation, transmit spectra for G.fast
• Etc.
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium24
Bringing the industry into motion
CELTIC consortium Measurements on wiring
Techno-economicsDisseminationBT, Telefonica, FT, TT, ...TNO, Uni-Lund, Uni-Madrid, ...Ericsson, UpZide, ...
Mid 2010: start operator requirementsDec 2010: presentation 45min, 100-150 pDec 2010: liasion to ITU
Feb 2011: start of "G.fast"--> 6 contributions
April 18: ITU-T teleconference"--> inspired by BBF actions
Geographic statistics
Standard(s)
2009-2011
--> 3 contributions
Let’s initiate a standard
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium25
Bringing the industry into motionSeveral other activities
• Progressing definition of G.fast• consolidated functional requirements
• via Broadband Forum / SPAC• contributions to ITU-T-SG15 (april 2011)
• contributions about cable measurements• preliminary requirements (BBF)
• Making the concept known• white paper on “Enabling 4GBB” in
Broadband Journal of the SCTE(same text also available during this seminar)
• Presentations DSL Seminar 2011, 2010, 2009• More on website www.4GBB.eu
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium26
Conclusions
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium27
Conclusions
• Deploying a mix of Hybrid & Full FttH looks very attractive• Hybrid variant may reduce cost (wrt. Full)• Hybrid variant may speed-up deployment (wrt. Full)• Both advantages reduce churn to competition (cable operators)
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium28
Conclusions
• Deploying a mix of Hybrid & Full FttH looks very attractive• Hybrid variant may reduce cost (wrt. Full)• Hybrid variant may speed-up deployment (wrt. Full)• Both advantages reduce churn to competition (cable operators)
• Hybrid FttH is feasible • Studies about when, where, how are ongoing in 4GBB consortium • Interim results are being disseminated
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium29
Conclusions
• Deploying a mix of Hybrid & Full FttH looks very attractive• Hybrid variant may reduce cost (wrt. Full)• Hybrid variant may speed-up deployment (wrt. Full)• Both advantages reduce churn to competition (cable operators)
• Hybrid FttH is feasible • Studies about when, where, how are ongoing in 4GBB consortium • Interim results are being disseminated
• Hybrid FttH is gaining more and more interest from the industry• “G.fast” has recently initiated within ITU-T-SG15• Functional requirements are being identified via BBF
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium30
Conclusions
• Deploying a mix of Hybrid & Full FttH looks very attractive• Hybrid variant may reduce cost (wrt. Full)• Hybrid variant may speed-up deployment (wrt. Full)• Both advantages reduce churn to competition (cable operators)
• Hybrid FttH is feasible • Studies about when, where, how are ongoing in 4GBB consortium • Interim results are being disseminated
• Hybrid FttH is gaining more and more interest from the industry• “G.fast” has recently initiated within ITU-T-SG15• Functional requirements are being identified via BBF
If you see a need for affordable bitrates at “fiber speed”, then investigate how “Hybrid FttH” fits in your strategy
DSL Seminar, May 23-25, 2011, The NetherlandsFeasibility of Hybrid FTTH - dr. Rob F.M. van den Brink - TNO / 4GBB consortium31