Transcript (Slides)

Next Generation Access
Ivan Boyd
BT Research and Venturing
NGA - The Barriers
Barriers:
• High upfront capital investment
• Large civil infrastructure costs and effort
• Uncertain Operational Cost
• Uncertain take-up rates
• Uncertain revenues from new broadband services
• Regulatory Uncertainty
© British Telecommunications plc
BT Current Position on FTTP
• BT infrastructure operations in separate unit called Openreach
• Openreach will own infrastructure of future Optical Access/
Metro Network
• Openreach provides equal access for all Communications
Providers (CPs) - Equivalence of Input (EOI)
• FTTP viable in Greenfield sites with ~>20 premises
– (actual number depends on detailed economics)
• GPON preferred FTTP solution
• No commitment at this point to mass market roll out of FTTP.
© British Telecommunications plc
Research to address the Challenges
Capital Cost
- New architecture to eliminate equipment
- Improved and more efficient deployment processes
- Maximise the lifetime of infrastructure (plan day 1
for evolution)
Operation Cost
- Simplify the network
- Consolidate nodes
© British Telecommunications plc
Research Network Vision
1000-way
split
10Gbit/s
10Gbit/s
100km
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Steeping stones to the Vision
1. Extended Reach GPON (60km reach, 128-way split, 2.5/1.25Gbit/s)
ONU
OLT W
Local Exchange
ONU
4
X
4
ONU
4x32-way
Split
OLT S
128-way total split
ONU
60km
2. Asymmetrical Long Reach (100km reach, 512-way split, 10/2.5Gbit/s)
CUSTOMER
Client
Demo 1:
Demo 3:
Demo 2:
Demo 3:
Jack PC
Client
Video
Client
HD CCTV
Media PC
ONT
ACCESS/
BACKHAUL
GPON
METRO
NODE
Demo 3:
CORE
NODE
Super Metro
Node
ONT
LR-PON
PE
Super Metro
Node
P
IP/MPLS
OLT
P
Aggregator
Core
Ethernet
hiD 6670
Core Ethernet
PBT/PBB-TE
Core
Ethernet
hiD 6670
ONT
100km
PE
Cisco
CRS
ONT
© British Telecommunications plc
METRO
NODE
CORE
NODE
OLT
hiD 6630
Xbox 360
CORE
NODE
l
Optical Core
DWDM
GMPLS control
l
Switch
Video
Services
Server
Jack PC
Server
HD CCTV
Capex savings: Conventional FTTH vs Long reach PON
50% Penetration, No Duct Build
Duct Build
ONU's
Rural
Fibre Enclosures
Fibre Cable
Cost per Customer
Urban
Backhaul
SDH Backhaul
Long Reach PON
PON –
backhaul
Long Reach PON
PON –
backhaul
Exchange
Electronics
FSAN PON 1:1
© British Telecommunications plc
Splitters
Infrastructure Research – Deployment Cost savings
5%
4%
7%
E-side Duct
3%
16%
8%
• Single
D-side infrastructure
On-site DiG duct
Drop
man blown fibre
Fibre
Enclosures
• Overhead Blown fibre
23%
34%
Splitters
BF Tube
E-side Duct
• Duct congestion relief
6% 2%
8%
D-side infrastructure
12%
On-site DiG duct
5%
Drop
11%
Fibre
31%
© British Telecommunications plc
Cost reduced
by ~1/3
Enclosures
Splitters
25%
BF Tube
Evolution to Future networks-extending the infrastructure life
Day 1 Greenfield GPON deployment
to metro node
LR-ONU
GPON
At day one install WDM
couplers in local exchange
backhaul
GPON GPON
GPON
GPON –ONUs with blocking filters
Local
Exchange
Optical NTE to simplify ONU upgrade
Cable
chamber
Fibre lean cable back
towards Exchange
GPON-ONU
GPON-ONU
GPON-ONU
LR-ONU
© British Telecommunications plc
GPON-ONU
LR-ONU
GPON-ONU
Upgrade to Long Reach PON
to metro node
LR-ONU
GPON
GPON OLT removed from local exchange
backhaul
GPON GPON
GPON
Local
Exchange
Cable
chamber
Fibre lean cable back
towards Exchange
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
© British Telecommunications plc
GPON-ONU
LR-ONU
GPON-ONU
LR-ONU
Capex savings: Long reach PON + Optical NTE
deployed with infrastructure
50% Penetration, No Duct Build
Optical NTE
Duct Build
ONU's
ONU
Rural
Fibre Enclosures
Fibre Cable
Cost per Customer
Urban
Backhaul
SDH Backhaul
Long Reach
PON
PON –
backhaul
PON –
backhaul
Exchange
Electronics
FSAN PON 1:1
© British Telecommunications plc
Splitters
Long Reach
PON
Operational Cost
High Density Pop, Head End Consolidation
OpEx Drivers as Fraction of Opex Costs
$90
OpEx
$80
Annual Cost per Sub
$70
$60
51% OpEx
Savings
$50
59% OpEx
Savings
CO Related
Fiber Related
$40
Hardware Related
$30
$20
$10
$0
5km
Case 3
1x4,1x8
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20km
Case 4
1x4,1x8
20km
Case 5
1x4,1x32
Fiber-Related OpEx
High Density Pop, Head End Consolidation
Annual Cost per Sub
$8
8.8% Savings/Sub/yr
47% Savings/Sub/yr
$6
$4
Even greater
savings to be
expected with
LR-PON
$2
$0
5km
Case
3
1x4,1x8
© British Telecommunications plc
20km
Case
4
Fiber1x4,1x8
Related OpEx
20km
Case
5
1x4,1x32
CO-Related OpEx
High Density Pop, Head End Consolidation
$80
Greater CO consolidation
with LR-PON . Therefore
much greater savings
anticipated.
$70
Annual Cost per Sub
$60
$50
$40
$30
4 COs
75% Savings/Sub/yr
75% Savings/Sub/yr
$20
$10
1 CO
1 CO
$0
Case
5km3
1x4,1x8
© British Telecommunications plc
Case
4
20km
CO Related
1x4,1x8
Case
5
20km
1x4,1x32
Conclusions
• There is no economic case for large scale FTTP roll out in the UK
based on existing solutions
• Research team investigating a radical “Long Reach PON” solution
that changes the economic structure of networks:
– Longer reach access to eliminate metro networks
– Higher capacity – 10GBit/s symmetrical
– Greater split/sharing to improve economics
– Network simplification and node consolidation to reduce opex
– Optical NTE and Self-install ONU to reduce capital cost of the
infrastructure provider and simplify upgrades
• An intermediate step could be extended reach GPON
• There is an on-going need for infrastructure research that
addresses more efficient fibre deployment
© British Telecommunications plc