Next Generation Access - a Strategy for Volume Deployment British Computer Society 9

Next Generation Access
- a Strategy for Volume Deployment
British Computer Society
9th March 2011
Simon Fisher
Principal consultant
Strategic 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
The Copper Access Network
Broadband Enabler or Bottleneck?
Local Exchange
Exchange
Equipment
Customer Premises
Main Distribution
Frame
PCP Cabinet
Joint
Overhead
DP
Network
Termination
Cable Segment
Dropwire
Underground
DP
M side(av. 1.8km)
D side(av. 500m)
Final Drop(av. 30m)
UK Network build statistics :5,581
85,450
4,300,000
3
Exchanges
PCPs
DPs
4,781,632
210,510
59,000,000
Joint boxes
Manholes
Metallic pairs
32,000,000
121,207,396
2.3km
Working lines
Total pair km
Average loop length
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
Openreach approved rate coverage for exchange based ADSL1 as penetration moves
to 50% of cable pairs
100%
100%
90%
90%
Exchange based
loss estimate
p e rc e n ta g e c o v e ra g e
70%
Network data
based model
60%
50%
40%
30%
Exchange based
loss estimate
80%
percentage coverage
80%
70%
60%
Network data
based model
50%
40%
30%
20%
20%
10%
10%
0%
0%
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
Downstream (Mb/s)
ADSL
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22
Downstream (Mb/s)
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
4
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
The UK Supply Chain
Customer (End User)
• Quality of Service
• Fulfilment, Assurance and CP Migration
and/or
and/or
Common Presentation to CPs
- Ethernet Bitstream
- Option for Physical Media Independence
Enable Voice and Broadband (Data) applications
Retailer
Solutions Provider
Communication Provider
Openreach
Equivalence of Input
Super-fast Broadband rollout.
BT’s July 2008 Announcement
Phase Deployment
Phase
1
2
3
4
5
6
7
Exchanges
Cabinets
Premises Passed
2
96
29141
29
1820
701628
65
2911
998489
87
3367
615796
217
9039
219
5818
To be announced early 2011
• 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
Super-fast Broadband rollout
•
Phase 1: 30k premises passed (July 2009)
–
–
•
Phase 2: 500k premises passed (early 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 28 exchanges enabled for FTTC
Phase 3: 1m premises passed (spring 2010)
–
–
•
Customer trial in Whitchurch and Muswell Hill
Glasgow Halfway brought forward and
enabled Oct 2009
The next 63 exchanges enabled for FTTC
End of 2010: 4m+ premises passed
June 2012: 10m premises passed
–
40% UK (FTTC 75%, FTTP 25%)
Key
Areas of NGA
bid activity
FTTP
FTTC Trial/Pilot
Halfway
2. Scotland
Dean
3. Scotland
Glasgow
EdinburghWestern
Corstorphine
4a.Craiglockhart
Scotland
Edinburgh
GlasgowPenicuik
Bridgeton
Dalgety
Bay
Glasgow
Giffnock
Dunfermline
Livingston Station
Glasgow
Newton Mearn
Glasgow
Bothwell
2. Northern Ireland
Belfast
Balmoral
3.
Northern
Ireland
Lisburn
Northern
Ireland
4a. Midlands & Wales
Solihull & Wales
3. Midlands
Earlsdon
Glossop
Kenilworth
Hinckley
Tamworth
Barry & Wales
2. Midlands
Warwick
Calder Valley
Penarth
Ortons Cardiff
Birmingham,
Northern
Stoneygate
FallingsHalifax
Park
Coalville
GreatPudsey
Barr
Willaston
Leamore
Taffs Well
Llanishen
Caerphilly
Nuneaton
Llanedeyrn
Tettenhall
Hednesford
Wednesbury
Beauchief
Walsall
Ranmoor
4a. West
Toothill
Blunsdon
Whitchurch
Chippenham
3. West
Bristol
Worle North
Bristol West
Portishead
Locksheath
Downend
Cornwall Chandlers Ford
Fair Oak
Andover
Eastleigh
3. Northern England
Chester-Le-Street
Durham
East Herrington
Hetton-Le-Hole
Altrincham
Aston-Under-Lyne
Cheetham
Chorlton
Denton
Hyde
Manchester East
Moss Side
Prestwich
Stalybridge
Swinton, Gtr Manc
Urmston
Walkden
Wilmslow
Armley England
4a.
Northern
2. Northern
England
Castleford
Bury,Headingley
Gtr Bramhall
Manc
Congleton
Didsbury
Low
Moor
Lofthouse
Heaton
Moor Gate
Pontefract
Guiseley
Failsworth
Shipley
Oldham
Rusholme
4a. Home Counties
Bicester
Newport
Pagnell
3. Home
Counties
Aylesbury
Berkhamsted
Bradwell Abbey
Didcot
Billericay
Harpenden
Brentwood
2. London
Maidenhead
Elstree
Foxhall
Thamesmead
2. HomeHainault
Counties
Crowthorne
3. London
Enfield
Leagrave
Wokingham
Hoddesdon
Barking
Chingford
Luton
4a. London
Earley
Lea Valley
Barnet
Tottenham
Chelmsford
Albert Dock
Langley
Loughton
Eltham
Watford
Hemel Hempsted
Wanstead
Caversham
Stanford-Le-Hope
Greenwich
Woolwich
Basingstoke
Mile End
StReading
Albans South
Hornchurch
Canonbury
Parsons GreenHighams Waltham
Henley Cross
on Thames
Park
Ingrebourne
Edmonton
London
Skyport
Braintree
Woodford
New Southgate
Greenford
Brighton Hove
Dartford
Ponders
End
Merton Park
Muswell Hill
Sittingbourne
Sidcup
Portsmouth Central
Slade Putney
Green
Wimbledon
Stamford
Hill
Sutton Cheam
Ebbsfleet
Mitcham
Openreach Next Generation Access options
Openreach
Handover
Point
External Network
GPON
Shared Bandwidth
LAYER 2
SWITCH
CP1
CP2
CP’N’
End User
ONT
Ethernet
10/100Mbit/s
~32 way split
Ethernet
10/100Mbit/s
2.4 Gbit/s Downstream
1.2 Gbit/s Upstream
Remote VDSL2 DSLAMs
CP1
LAYER 2
SWITCH
Active
BitStream
Products
CP2
CP’N’
DSLAM
Pt-Pt or PON fed
DSLAMs
DSLAM
MDU
LAYER 2
SWITCH
CP1
Ethernet
10/100Mbit/s
DSLAM
CP2
CP’N’
Ethernet
100Mbit/s
1Gbit/s
Point to Point Ethernet
A
• Openreach product from A to B
• EOI Active Line Access products offered to CPs
B
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
Downstream
Peak
Downstream
Prioritised
Product
Downstream
Hard Fault
Upstream
(FTTC – DSL
Line Rate)
Upstream
Hard Fault
(FTTC - DSL
Line Rate)
GEA-FTTP
40Mb/s
20Mb/s
20Mb/s
2Mb/s
2Mb/s
GEA-FTTC
≤40Mb/s
≤20Mb/s
15Mb/s
2Mb/s
250kb/s
GEA-FTTP
40Mb/s
20Mb/s
20Mb/s
10Mb/s
10Mb/s
GEA-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
VDSL2
DSLAM
Hand-Over Node
End User Premises
PCP
NTE 5
& SSFP
CP1
HO
Head End
GEA Data Port
VDSL2
modem
CPn
Direct fibre
Multiple GigE links
Baseband Voice &
Legacy Services
240Vac
Existing Copper E-side Network from DLE
D-Side Copper
GEA Product
Voice and Legacy services supplied from the exchange.
Premium Broadband product provided as GEA over FTTCab
Demand led deployment model
FTTC Access infrastructure
Primary Copper Crossconnect Cabinet
VDSL2
Cabinet
NGA FTTP architecture
CP 1
in same
BT building
NGA hand-over
node
External network
End user
ONT 1
CP 2
outside
BT building
Fibre Joint
Optical interfaces 1 Gbit/s or 10 Gbit/s
Port 1
Cable
Link
CP 3
remote
different
BT building
HO Frame
CP 4
remote
non
BT building
HO Frame
GPON
OLT
32 way split
ONT 32
ONBS
GPON
OLT
End user
interface 10Mbit/s
100Mbit/s
1000Mbit/s
Port 1 Ethernet
Port 4
Shared bandwidth
32 way split
Port 4
BES
Existing
products
28dB max
Openreach GEA product variants
• GEA data product
• GEA voice enablement product
• GEA CP GigE port product (includes fibre connectivity)
FTTP Access infrastructure - Brownfield
Splitter Node (SPN) – 128 Customer Capacity
BTID designed High Capacity
Single Customer tray
I/O
Splitter No.4
I/O
Splitter No.3
Splitter No.2
Splitter No.1
Storage trays
Spare ‘D’ fibres
SPLITTER LEG(S)
Storage trays
Splitter outputs
Tray 1
Cutomer trays
‘D’ side fibre
TRAY 1fibre route (<4 fibres)
TRAY 2fibre route (<4 fibres)
Tray 2
GPON ONT
4x 1GE Ethernet Ports
2x Voice ports
FTTC VDSL2
FTTP GPON
Generic Ethernet Access
Layer 2 Switch
CP Handover Point
Summary - NGA a Mixed Economy model
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
Investment depends on a range of regulatory issues which are the
subject of ongoing discussion.
FTTC
Where • Brownfield overlay
Benefit –
• Enhanced product portfolio
• Address competitive threat
• Rapid deployment
When –
• Operational Trial – Dec 2008
• Market Trial – July 2009
• Early Market Deployment – Jan 2010
FTTP
Where • Greenfield Newsites
• Brownfield low Capex
Benefit –
• Enhanced product portfolio
• Reduced Capex
• Reduced Opex
When • Brownfield Tech’ Trial – Dec 2009
• Brownfield Pilot – April 2010
• Greenfield – Predicated on Strategic
Voice Solution
Pt-Pt
• Major Business Sites
• Business As Usual
Future - 10Gbit/s PON
The 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
CP1
CPn
HO
Ethernet Switch
Hand-Over Node
WDM
32 way split
End User
Premises
ONT
OLT
OLT
End User
Premises
ONT
Generation 1 GPON
Generation 2 GPON
Wavelength Filters
WDM-PON
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.
Each customer served by a dedicated wavelength
1Gb/s per customer
Requires a new wavelength splitter technology
MDU

40
30

    
20
10
VDSL
A
A
W
G



Research prototype WDM-PON system under evaluation
We are working on standards in FSAN/ITU
• could be complete ~2012
FTTDP
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.