boyd next generation access

8/8/2019 BOYD Next Generation Access

1/15

Next Generation Access

Ivan Boyd

BT Research and Venturing


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3/15

BritishTelecommunications 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.


4/15


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


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Research Network Vision

100km

1000-way

split 10Gbit/s

10Gbit/s


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Steeping stones to the Vision1. Extended Reach GPON(60km reach, 128-way split, 2.5/1.25Gbit/s)

ONU

ONU

ONU

ONU

4x32-way

Split

4

X

4

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 ServicesJack PC

Server

Video

Server

HD CCTV

Xbox 360

HD CCTV

Media PC

Jack PC

Client

Video

Client

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 Core

DWDM

P

GMPLS control

hiD 6670

Core

EthernetCore Ethernet

PBT/PBB-TEhiD 6670Core

EthernetOLT

Switch

PEPE

Aggregator


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Capex savings: Conventional FTTH vs Long reachPON

FSAN PON 1:1

Duct Build

Fibre Enclosures

Fibre Cable

Splitters

SDH Backhaul

Exchange

Electronics

50% Penetration, No Duct Build

PO

N

bac

khaul

CostperC u

stomer

ONU's

Fibre Enclosures

Fibre Cable

Splitters

Backhaul

Exchange

Electronics

Urban

Rural

LongReac

hPON

PON

backhaul

LongReac

hPON


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7%

16%

23%34%

8%

3%

5%4%

E-side Duct

D-side infrastructure

On-site DiG ductDrop

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 reduced

by ~1/3

Single man blown fibre

Overhead Blown fibre

Duct congestion relief


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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


10/15


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


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Capex savings: Long reach PON + Optical NTEdeployed with infrastructure

FSAN PON 1:1

Duct Build

Fibre Enclosures

Fibre Cable

Splitters

SDH Backhaul

Exchange

Electronics

50% Penetration, No Duct Build

PO

N

bac

khaul

CostperC u

stomer

ONU's

Fibre Enclosures

Fibre Cable

Splitters

Backhaul

Exchange

Electronics

Urban

Rural

PON

bac

khaul

ONU

Long Reach

PONLong Reach

PON

Optical NTE


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Operational Cost

High Density Pop, Head End Consolidation

OpEx Drivers as Fraction of Opex Cost

$0

$10

$20

$30

$40

$50

$60

$70

$80

$90

Case 3 Case 4 Case 5

AnnualCostpe

rSub

CO Related

Fiber Related

Hardware Related

5km 20km 20km

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

OpEx

51% OpEx

Savings59% OpEx

Savings


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Fiber-Related OpEx


$0

$2

$4

$6

$8


AnnualCostp

erSub

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


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CO-Related OpEx


$0

$10

$20

$30

$40

$50

$60

$70

$80


AnnualCostp

erSub

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.


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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 solutionthat 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 thataddresses more efficient fibre deployment

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