Next Generation Access Ivan Boyd BT Research and Venturing.

Next Generation Access

Ivan Boyd

BT Research and Venturing

© British Telecommunications plc

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


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.


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


Research Network Vision

100km

1000-waysplit 10Gbit/s

10Gbit/s

802770231

Not sure how much of the Long reach story we want to say - how relevant to Singapore


Steeping stones to the Vision 1. Extended Reach GPON (60km reach, 128-way split, 2.5/1.25Gbit/s)

ONU

ONU

ONU

ONU

4x32-waySplit

4X4

60km

128-way total split

Local Exchange

OLT S

OLT W

2. Asymmetrical Long Reach (100km reach, 512-way split, 10/2.5Gbit/s)

CORE NODE

CORE NODE

CORE NODE

METRO NODE

METRO NODE

ACCESS/BACKHAULCUSTOMER

LR-PON Services

Jack PCServer

VideoServer

HD CCTV

Xbox 360

HD CCTV

Media PC

Jack PCClientVideoClient

Demo 1:

Demo 3:

Demo 2:

Demo 3:

Demo 3:

100km

GPONClient OLTONT

ONT

ONT

ONT

hiD 6630

IP/MPLSPCisco CRS

Super Metro Node

Super Metro Node

Optical CoreDWDM

P

GMPLS control

hiD 6670

Core EthernetCore Ethernet

PBT/PBB-TEhiD 6670

Core Ethernet

OLTSwitch

PEPE

Aggregator


Capex savings: Conventional FTTH vs Long reach PON

FSAN PON 1:1

Duct Build

Fibre Enclosures

Fibre Cable

Splitters

SDH Backhaul

Exchange

Electronics

50% Penetration, No Duct Build

PO

N –

b

ac

kh

au

l

Cos

t pe

r C

usto

mer

ONU's

Fibre Enclosures

Fibre Cable

Splitters

Backhaul

Exchange

Electronics

Urban

Rural

Lo

ng

Re

ac

h P

ON

PO

N –

b

ac

kh

au

l

Lo

ng

Re

ac

h P

ON


7%

16%

23%34%

8%

3%

5%4%

E-side Duct

D-side infrastructure

On-site DiG duct

Drop

Fibre

Enclosures

Splitters

BF Tube

2%12%

31%

25%

11%

5%

8%6%

E-side Duct

D-side infrastructure

On-site DiG duct

Drop

Fibre

Enclosures

Splitters

BF Tube

Infrastructure Research – Deployment Cost savings

Cost reducedby ~1/3

• Single man blown fibre

• Overhead Blown fibre

• Duct congestion relief


backhaul

Evolution to Future networks-extending the infrastructure lifeDay 1 Greenfield GPON deployment

Fibre lean cable back towards Exchange

Local Exchange

to metro node

Cable chamber

GPON-ONU

GPON-ONU

GPON-ONU

GPON-ONU

GPON-ONU

LR-ONU

LR-ONU

At day one install WDM couplers in local exchange

GPONGPONGPON

LR-ONU

GPON

GPON –ONUs with blocking filters

Optical NTE to simplify ONU upgrade


backhaul

Upgrade to Long Reach PON

Fibre lean cable back towards Exchange

Local Exchange

to metro node

Cable chamber

GPON-ONU

GPON-ONU

GPON-ONU

GPON-ONU

GPON-ONU

LR-ONU

LR-ONU

GPONGPONGPON

LR-ONU

GPON

LR-ONU

GPON OLT removed from local exchange

LR-ONU

LR-ONU


Capex savings: Long reach PON + Optical NTE deployed with infrastructure

FSAN PON 1:1

Duct Build

Fibre Enclosures

Fibre Cable

Splitters

SDH Backhaul

Exchange

Electronics

50% Penetration, No Duct Build

PO

N –

b

ac

kh

au

l

Cos

t pe

r C

usto

mer

ONU's

Fibre Enclosures

Fibre Cable

Splitters

Backhaul

Exchange

Electronics

Urban

Rural

PO

N –

b

ac

kh

au

l

ONU

Long Reach PON

Long Reach PON

Optical NTE


Operational CostHigh Density Pop, Head End Consolidation

OpEx Drivers as Fraction of Opex Costs

$0

$10

$20

$30

$40

$50

$60

$70

$80

$90

Case 3 Case 4 Case 5

Annual Cost

per

Sub

CO Related

Fiber Related

Hardware Related

5km 20km 20km

1x4,1x8 1x4,1x8 1x4,1x32

OpEx

51% OpEx Savings

59% OpEx Savings


Fiber-Related OpEx High Density Pop, Head End Consolidation

$0

$2

$4

$6

$8


An

nu

al

Co

st

pe

r S

ub

Fiber Related OpEx

5km 20km 20km

1x4,1x8 1x4,1x8 1x4,1x32

8.8% Savings/Sub/yr

47% Savings/Sub/yr

Even greater savings to be expected with LR-PON


CO-Related OpEx High Density Pop, Head End Consolidation

$0

$10

$20

$30

$40

$50

$60

$70

$80


An

nu

al

Co

st

pe

r S

ub

CO Related

5km 20km 20km

1x4,1x8 1x4,1x8 1x4,1x32

75% Savings/Sub/yr 75% Savings/Sub/yr4 COs

1 CO1 CO

Greater CO consolidation with LR-PON . Therefore much greater savings anticipated.


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

Next Generation Access Ivan Boyd BT Research and Venturing.

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Transcript of Next Generation Access Ivan Boyd BT Research and Venturing.