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

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Downstream (Mb/s)

perc

enta

ge c

over

age

Exchange basedloss estimate

Network databased model

Openreach approved rate coverage for exchange based ADSL1 as penetration moves to 50% of cable pairs

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0 1 2 3 4 5 6 7 8 9 10

Downstream (Mb/s)

perc

enta

geco

vera

ge

Exchange basedloss estimate

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

Illustrative impact on number of headend locations…

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

FTTC Access infrastructure

Primary Copper Cross- connect Cabinet

VDSL2 Cabinet

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

FTTP Access infrastructure - Brownfield

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

GPON ONT

4x 1GE Ethernet Ports2x Voice ports

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.