Next Generation Access - a Strategy for Volume Deployment
British Computer Society
9th March 2011
Simon Fisher Principal consultantStrategic Network Design
Content
Openreach and the UK supply chain
Meeting the challenges of volume deployment - Active Line Access and the Mixed Economy strategy
Generic Ethernet Access and the enabling architectures
Future technologies
3
The Copper Access Network Broadband Enabler or Bottleneck?
Local Exchange
PCP CabinetOverhead
DP
Customer Premises
Joint
UndergroundDP
Dropwire
NetworkTerminationCable Segment
Main DistributionFrameExchange
Equipment
UK Network build statistics :-
32,000,000 Working lines121,207,396 Total pair km2.3km Average loop length
5,581 Exchanges85,450 PCPs4,300,000 DPs
4,781,632 Joint boxes210,510 Manholes59,000,000 Metallic pairs
M side (av. 1.8km) D side (av. 500m) Final Drop (av. 30m)
4
Exchange Based ADSL and ADSL2+ Performance Model (GB Model, 50% Cable Fill)
Openreach approved rate coverage for exchange based ADSL2+ as penetration moves to 50% of cable pairs
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Downstream (Mb/s)
perc
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ge c
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age
Exchange basedloss estimate
Network databased model
Openreach approved rate coverage for exchange based ADSL1 as penetration moves to 50% of cable pairs
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Network databased model
ADSL ADSL2+Line Length and Line Quality are key factors
Performance is limited by crosstalk from other end users- Cable fill has an impact- Actual performance depends on relative position of copper pairs in the cable- Every line is in a unique situation
Other Factors include: External Noise, Customer Wiring, Modem and Configuration Options
Openreach and the UK Supply Chain
Deliver Next Generation Access Capability to Communications Providers at lowest practical economical point- Equal access to all Communications Providers- Open Network- Enable CP Innovation- Enable Excellent Customer Experience
• Quality of Service• Fulfilment, Assurance and CP Migration
Common Presentation to CPs- Ethernet Bitstream- Option for Physical Media Independence
Enable Voice and Broadband (Data) applications
The UK Supply Chain
and/or Retailer
and/or Solutions Provider
Communication Provider
Customer (End User)
Openreach
Equivalence of Input
Super-fast Broadband rollout.BT’s July 2008 Announcement
• A further £1 billion will be spent to make fibre-based, “super-fast” broadband available to approximately 66% (16 million) of UK homes and premises by 2015
• On course to pass 4 million homes by the end of 2010.
• We will provide a service capability on an equivalent basis to all CPs
• Deployment locations must be commercially viable
• Roll out will be demand-led, based on CP commitment to Openreach
• Local/devolved government can help achieve and assess viable levels of demand
• We plan to install an average of 80-90 cabinets per day
Phase Deployment
Phase Exchanges Cabinets Premises Passed1 2 96 29141
2 29 1820 7016283 65 2911 998489
4 87 3367 6157965 217 90396 219 58187 To be announced early 2011
2. Midlands & WalesCalder Valley
CardiffHalifaxPudsey
Taffs WellCaerphilly
2. Midlands & WalesCalder Valley
CardiffHalifaxPudsey
Taffs WellCaerphilly
Muswell Hill
Cornwall
Northern Ireland
WhitchurchHighams Park
Ebbsfleet
London
Bradwell Abbey
Glasgow
2. ScotlandDean
Glasgow Western
2. ScotlandDean
Glasgow Western3. ScotlandEdinburgh CorstorphineEdinburgh Craiglockhart
Glasgow BridgetonGlasgow Giffnock
3. ScotlandEdinburgh CorstorphineEdinburgh Craiglockhart
Glasgow BridgetonGlasgow Giffnock
4a. ScotlandPenicuik
Dalgety BayDunfermline
Livingston StationGlasgow Newton Mearn
Bothwell
4a. ScotlandPenicuik
Dalgety BayDunfermline
Livingston StationGlasgow Newton Mearn
Bothwell
Foxhall
Halfway
Super-fast Broadband rollout
2. Northern EnglandBury, Gtr Manc
DidsburyHeaton Moor
FailsworthOldham
Rusholme
2. Northern EnglandBury, Gtr Manc
DidsburyHeaton Moor
FailsworthOldham
Rusholme
2. LondonThamesmead
EnfieldChingfordTottenham
WatfordWoolwich
CanonburyEdmonton
2. LondonThamesmead
EnfieldChingfordTottenham
WatfordWoolwich
CanonburyEdmonton
2. Home CountiesLeagrave
LutonChelmsford
Hemel HempstedBasingstoke
2. Home CountiesLeagrave
LutonChelmsford
Hemel HempstedBasingstoke
2. Northern IrelandBelfast Balmoral
2. Northern IrelandBelfast Balmoral
3. Midlands & WalesGlossopHinckley
BarryPenarth
Birmingham, NorthernFallings ParkGreat BarrLeamoreNuneatonTettenhall
WednesburyWalsall
3. Midlands & WalesGlossopHinckley
BarryPenarth
Birmingham, NorthernFallings ParkGreat BarrLeamoreNuneatonTettenhall
WednesburyWalsall
3. WestBristol NorthBristol WestDownend
3. WestBristol NorthBristol WestDownend
3. Northern EnglandChester-Le-Street
DurhamEast HerringtonHetton-Le-Hole
AltrinchamAston-Under-Lyne
CheethamChorltonDentonHyde
Manchester EastMoss SidePrestwich
StalybridgeSwinton, Gtr Manc
UrmstonWalkdenWilmslowArmley
CastlefordHeadingleyLow MoorPontefract
Shipley
3. Northern EnglandChester-Le-Street
DurhamEast HerringtonHetton-Le-Hole
AltrinchamAston-Under-Lyne
CheethamChorltonDentonHyde
Manchester EastMoss SidePrestwich
StalybridgeSwinton, Gtr Manc
UrmstonWalkdenWilmslowArmley
CastlefordHeadingleyLow MoorPontefract
Shipley
3. LondonBarkingBarnetEltham
GreenwichHornchurchIngrebourne
New SouthgatePonders End
SidcupSlade GreenStamford Hill
3. LondonBarkingBarnetEltham
GreenwichHornchurchIngrebourne
New SouthgatePonders End
SidcupSlade GreenStamford Hill
3. Home CountiesBerkhamsted
BillericayBrentwood
ElstreeHainault
HoddesdonLea ValleyLoughton
Stanford-Le-HopeSt Albans
Waltham CrossWoodfordDartford
3. Home CountiesBerkhamsted
BillericayBrentwood
ElstreeHainault
HoddesdonLea ValleyLoughton
Stanford-Le-HopeSt Albans
Waltham CrossWoodfordDartford
3. Northern IrelandLisburn
3. Northern IrelandLisburn
4a. Midlands & WalesSolihull
EarlsdonKenilworthTamworthWarwickOrtons
StoneygateCoalvilleWillastonLlanishen
LlanedeyrnHednesfordBeauchiefRanmoor
4a. Midlands & WalesSolihull
EarlsdonKenilworthTamworthWarwickOrtons
StoneygateCoalvilleWillastonLlanishen
LlanedeyrnHednesfordBeauchiefRanmoor 4a. West
ToothillBlunsdon
ChippenhamWorle
PortisheadLocksheath
Chandlers FordFair OakAndoverEastleigh
4a. WestToothill
BlunsdonChippenham
WorlePortisheadLocksheath
Chandlers FordFair OakAndoverEastleigh
4a. Northern EnglandBramhall
CongletonLofthouse Gate
Guiseley
4a. Northern EnglandBramhall
CongletonLofthouse Gate
Guiseley
4a. Home CountiesBicester
Newport PagnellAylesbury
DidcotHarpenden
MaidenheadCrowthorneWokingham
EarleyLangley
CavershamReading South
Henley on ThamesBraintree
Brighton HoveSittingbourne
Portsmouth Central
4a. Home CountiesBicester
Newport PagnellAylesbury
DidcotHarpenden
MaidenheadCrowthorneWokingham
EarleyLangley
CavershamReading South
Henley on ThamesBraintree
Brighton HoveSittingbourne
Portsmouth Central
4a. LondonAlbert DockWansteadMile End
Parsons GreenSkyport
GreenfordMerton Park
PutneyWimbledon
Sutton CheamMitcham
4a. LondonAlbert DockWansteadMile End
Parsons GreenSkyport
GreenfordMerton Park
PutneyWimbledon
Sutton CheamMitcham
Key
FTTC Trial/Pilot
FTTP
Areas of NGA bid activity
• Phase 1: 30k premises passed (July 2009)– Customer trial in Whitchurch and Muswell Hill– Glasgow Halfway brought forward and
enabled Oct 2009
• Phase 2: 500k premises passed (early 2010)– The next 28 exchanges enabled for FTTC
• Phase 3: 1m premises passed (spring 2010)– The next 68 exchanges enabled for FTTC– Up to 40k premises passed in Bradwell
Abbey, London, and Highams Park, Milton Keynes, for the FTTP brownfield customer trial
• Phase 4a: 2.5m premises passed (late summer 2010)
– The next 63 exchanges enabled for FTTC
• End of 2010: 4m+ premises passed• June 2012: 10m premises passed
– 40% UK (FTTC 75%, FTTP 25%)
Openreach Next Generation Access optionsEnd UserExternal Network
B
CP1
CP’N’
A
ActiveBitStreamProducts
CP2
Openreach Handover
Point
• Openreach product from A to B• EOI Active Line Access products offered to CPs
LAYE
R 2
SW
ITC
H
CP1
CP’N’
CP2
LAYE
R 2
SW
ITC
H
CP1
CP’N’
CP2
LAYE
R 2
SW
ITC
H
Ethernet 100Mbit/s1Gbit/s
Point to Point Ethernet
DSLAM
DSLAM
MDUDSLAM
Remote VDSL2 DSLAMs
Pt-Pt or PON fed DSLAMs
Ethernet 10/100Mbit/s
~32 way split Ethernet 10/100Mbit/s
GPON Shared Bandwidth
2.4 Gbit/s Downstream 1.2 Gbit/s Upstream
ONT
Ethernet 10/100Mbit/s
FTTP infrastructure - why PON?
Compared to Point-Point fibre, a PON solution offers -
Reduced head-end equipment complexity and cost- Shared optics – 1 to 32 End Users
Reduced fibre management complexity at the serving exchange- Smaller and less complex Optical Distribution Frames- “Fit and Forget” network – no additional infrastructure build to End User to supply additional CP access and
services
Reduced network build costs due to lower fibre count cables- Minimised duct build and fibre interconnect
Hands off electronic CP churn and service upgrade
Potential evolution to long reach PON technologies over time or in specific geographies- Supports strategic drive to reduce network build and operational costs
Product - why Ethernet?
Established and very competitive equipment market
Common interface across many different physical media (e.g. PONs, Pt-Pt, xDSL copper, Wi-Fi)
Includes Ethernet OAM functions which allows:- Clear demarcation between downstream & upstream providers
- Testing & diagnostics can be performed by downstream & upstream providers independently (key for consistent & good customer service)
Allows ‘downstream’ providers to innovate in IP services unhindered by details of ‘upstream’ technology
Multi-service: - E.g. VoIP, Video, Broadband, IP VPNs on the same physical interface
- Multi downstream providers on the same physical interface
NGA Generic Ethernet Access products
Product
Downstream Peak
Downstream Prioritised
Downstream Hard Fault(FTTC – DSL
Line Rate)
Upstream Upstream Hard Fault(FTTC - DSL Line Rate)
GEA-FTTP 40Mb/s 20Mb/s 20Mb/s 2Mb/s 2Mb/sGEA-FTTC ≤40Mb/s ≤20Mb/s 15Mb/s 2Mb/s 250kb/sGEA-FTTP 40Mb/s 20Mb/s 20Mb/s 10Mb/s 10Mb/sGEA-FTTC ≤40Mb/s ≤20Mb/s 15Mb/s ≤10Mb/s 2Mb/s
GEA-FTTP Premium 100Mb/s 20Mb/s 20Mb/s 10Mb/s 10Mb/s
• GEA-FTTC peak rates reflect the innate uncertainty in a DSL delivered service over variable copper loops. GEA-FTTC selects lines to deliver assured 15Mb/s downstream DSL line rate.
• FTTP platform uses dynamic bandwidth allocation to offer peak rates above the committed rate. There is the opportunity for further product bandwidth enhancements e.g. the current generation of ONTs is capable of supporting a 1Gbit/s peak rate service.
NGA FTTC architecture - Brownfield overlay
Voice and Legacy services supplied from the exchange.
Premium Broadband product provided as GEA over FTTCab
Demand led deployment model
D-Side Copper
Head EndHOCP1
CPn
Direct fibre
Hand-Over Node
Multiple GigE links
VDSL2 modem
End User Premises
GEA Data PortNTE 5 & SSFP
Baseband Voice & Legacy Services
Existing Copper E-side Network from DLE
240Vac
PCPVDSL2DSLAM
GEA Product
External network
28dB max
Shared bandwidth
End user
32 way split GPONOLT
End userinterface -10Mbit/s100Mbit/s1000Mbit/sEthernet
GPONOLT 32 way split
Openreach GEA product variants• GEA data product• GEA voice enablement product• GEA CP GigE port product (includes fibre connectivity)
ONT 1
ONT 32
Port 1
Port 4
Port 1
Port 4
NGA hand-overnode
Existingproducts
BES
ONBS
Optical interfaces -1 Gbit/s or 10 Gbit/s
CP 4remote
nonBT building
Fibr
e Jo
int
CableLink
CP 3remotedifferent
BT building
CP 1in same
BT building
CP 2outside
BT building
HO
Fra
me
HO
Fra
me
NGA FTTP architecture
Cutomer trays‘D’ side fibre
Storage traysSplitter outputs
Storage traysSpare ‘D’ fibres
Splitter No.2
Splitter No.4
Splitter No.3
Splitter No.1
Splitter Node (SPN) – 128 Customer Capacity
I/O
I/O
Tray 2
Tray 1
SPLITTER LEG(S)
TRAY 1-fibre route (<4 fibres)
TRAY 2-fibre route (<4 fibres)
BTID designed High CapacitySingle Customer tray
Summary - NGA a Mixed Economy modelLa
yer 2
Sw
itch
CP
Han
dove
r Poi
nt
Gen
eric
Eth
erne
t Acc
ess
FTTC VDSL2
FTTP GPON
Pt-Pt
Ubiquitous Ethernet interface across different platforms
• Accessible by up to 10 million homes by 2012• Range of speeds up to 100Mbit/s • Basis for nationwide rollout led by demand and commercial viability
FTTCWhere -• Brownfield overlayBenefit –• Enhanced product portfolio• Address competitive threat• Rapid deploymentWhen –• Operational Trial – Dec 2008• Market Trial – July 2009• Early Market Deployment – Jan 2010
FTTPWhere -• Greenfield Newsites• Brownfield low CapexBenefit –• Enhanced product portfolio• Reduced Capex• Reduced OpexWhen -• Brownfield Tech’ Trial – Dec 2009• Brownfield Pilot – April 2010• Greenfield – Predicated on Strategic
Voice Solution
Pt-Pt• Major Business Sites• Business As Usual
Investment depends on a range of regulatory issues which are the subject of ongoing discussion.
Future - 10Gbit/s PONThe optical bearer in a PON architecture has bandwidth capacity to meet current and future End User requirements
Current FTTP deployment includes WDM components necessary to allow current 2.4G and future 10G systems to operate on the same fibre bearer.
WDM technology facilitates system upgrade of targeted or general End User population
10G PON standards were finalised in June 2010 – G.987 series
OLT
Eth
erne
t Sw
itch
HOCP1
CPn
32 way split WDM ONTONT
End UserPremises
Hand-Over Node
OLT
ONT
End UserPremises
Generation 2 GPON
Generation 1 GPON
Generation 2 GPON
Generation 1 GPONWavelength Filters
WDM-PON
10
20
30
40
AAWG
FTTDP
VDSL
MDU
Each customer served by a dedicated wavelength
1Gb/s per customer
Requires a new wavelength splitter technology
Research prototype WDM-PON system under evaluation
We are working on standards in FSAN/ITU• could be complete ~2012
No decision on preferred WDM architecture yet but actively engaged with developments to ensure current build doesn’t introduce barriers for future application and opportunities.
The NGA Case - Conclusions
Most Global NGA solutions are delivered by Vertically Integrated Providers who link new application revenues to infrastructure investment
NGA with Functional Separation (Horizontal segmentation) requires:- Regulatory certainty- Effective Commercial and Business Models which match long term infrastructure
investments to shorter term Retail cases- An industry consensus on the demand and the approach- Effective Wholesale access products- Well developed Retail products
Volume and scale are critical for all in the industry.
Whatever happens expect a mixed-economy model for a considerable time.