• Es una arquitectura de red Tipo FTTC que busca aprovechar al máximo los beneficios de llevar la fibra óptica lo más cerca del suscriptor en una red de cable. Busca eliminar los amplificadores de RF en la Red reduciendo el ruido y las interferencias asociados al proceso de amplificación y permitiendo manejar niveles más altos en salidas de RF de dispositivos activos.

9876543219642

Conventional HFCNode + n

Scalable Nodes

987654321983

Fiber Deep - HFCNode + 0

Fiber Deep Nodes

987654321987654321

Fiber-on-DemandFTTH & Node + 0

Fiber Deep Nodes

987654321Same HE Same HE equipmentequipment

Fiber to the Home100% Fiber with NIU

FTTH Nodes

http://www.encuentrosregionales.com/13conferencias/plataforma_garciabish-rosario2009_parte5.pdf

• En los nodos HFC se utilizan tradicionalmente de 8 a 12 fibras por cada nodo

• Al acercarnos con fibra óptica más cerca al cliente, el tamaño del nodo decrece y por ende la cantidad de fibras será superior en el HUB y Headend.

• Para reducir la cantidad de fibras, se usan técnicas de multiplexación con diferentes lóngitudes de onda, de modo que:

- Se concatenen varios retornos sobre una misma fibra- Se haga uso de retorno digital.

CWDM (Coarse Wavelength Division Multiplexing)

1430nm

1450nm

1470nm

1490nm

1510 nm

1530nm

1550nm

1570nm

1590nm

1610 nm

Hasta aquí en fibra

1430nm

1450nm

1470nm

1490nm

1510nm

1530nm

1550nm

1570nm

1590nm

1560nm

DWDM (Dense Wavelength Division Multiplexing)

Power Supply

Receivers(Forward Path)

Digital Transponder

Transceiver (Return Path)

RedundantPower Supply

RF Amplifier

NIVELES HASTA:

Forward.860 MHz = 58 dBmv54 MHz = 42 dBmv

Retorno.5MHz - 42MHz= 16dBmv

• Two Application-specific Designs– Fiber Deep Nodes

• 50 to 200 HP/Node• Up to 2x2 segmentation

– Segmentable HFC Nodes• 500 to 2000 HP/Node• Up to 4x4 segmentation

• Key Features– Optional redundant power supplies– Patented digital return– Integrated Ethernet services

provisioning– Integrated status

monitoring/control

Model NC4000Hconfigured for

1x2 Segmentation

Model NC4000Sconfigured for

2x4 Segmentation

• Designed for CWDM ITU based un-cooled lasers

• Flat and wide operating passband on CWDM ITU grid (20nm spacing), 1430-1610 nm

• High channel isolation to minimize crosstalk

• Provide excellent environmental, mechanical stability

• Occupies one half-depth slot and is LGX compatible

• Optional integrated 1310nm combiner/splitter

• Optional line monitoring test point

DT4000 Series Digital TransceiversDT4000 Series Digital Transceivers• Key Functions

– Analog to Digital Conversion– Key Status Monitoring Link– Pluggable Optics – Standard DTs Support Daisy

Chaining• Performance

– Immunity to certain analog impairments such as laser overdrive.

– More robust (thermal stability) – All nodes have uniform

performance and output level

DT4000 Series Digital Transceivers

2 Power Supplies 27 RF Amplifiers

1 Optical Node595 Homes Passed 79 HPM7.49 Miles UG595 Homes per Node

30 Total Active Devices

1.1 Miles per Node 7 Optical Nodes

595 Homes Passed 79 HPM7.49 Miles UG85 Homes per Node Average

1 Power Supply

8 Total Active Devices 0 RF Amplifiers

1.1 Miles per Node 7 Optical Nodes

85 Homes Per Node

595 Homes Passed 79 HPM7.49 Miles UG

Area B

Area A

340 Homes

255 Homes

Node

Node

Analog Return from Coax

Plant

Digital Reverse

A to DAnalog In

Fiber TransportSignal Flow

Node

Analog Return from Coax

Plant

A to D

Node

Analog In

Node

NodeAnalog

Return from Coax Plant

Digital Reverse

A to D

Headend or Hub

Analog Out

D to A

Analog In

Fiber TransportSignal Flow

NodeAnalog Return

from Coax Plant

A to D

Node

Analog In

AR4001

DT4030N-00TR4040-1550

AR4001

DT4030N-00TR4040-1570

AR4001

DT4030N-00TR4040-1610

AR4001

DT4030N-00TR4040-1590

Node 1-4

Node 1-1

.5klm/-.18dB

Node 1-2

-3.3

OP91S2S-EQ

GRYL

PU

BP3108DR3002

Node 1-1610

Node 2-1590

Node 1-3

OP91S2S-80

-1.3

-7.3

PU

YL

GR

OP91S2S-70

-1.9

-5.6

PU

YL

GR

0.5 dBm 0.5 dBm 0.5 dBm

HUB SITE

1610

1590

-2.2

OP34D5H-0-00

CWDM COM OUT

CWDM Loop IN

1570

1550

-2.5Node 3-1570

Node 4-1550

AT3306G-N-1

5.5km/-1.9dB

-3.3

OP91S2S-EQ

GRYL

PU-3.3

OP91S2S-EQ

GRYL

PU-3.3

OP91S2S-EQ

GRYL

PU

.5klm/-.18dB.5klm/-.18dB

TR4440B-1490-PI

TR4440B-1550-PI

TR4440B-1570-PI

TR4440B-1590-PI

TR4440B-1610-PI

AT3306G-N-1

-6.6

OP91S4S-EQ

GR

5.5km/-1.9dB

AR4001DT4030N-00TR4040-

1430

1430

1450

-1.4

OP94M5L-1-00

CW

DM

IN

to

CW

DM

O

UT

CW

DM

O

UT

1470

1490

1510

-1.6

AR4001DT4030N-00TR4040-

1450

AR4001DT4030N-00TR4040-

1470

AR4001DT4030N-00TR4040-

1490

Up to 1.5km/-.5dB

Up to 1.5km/-.5dB

Up to 1.5km/-.5dB

Up to 1.5km/-.5dB

BP3108CDR3002

DR3002

1430

1450

-1.4

OP34D5L-0-00

CW

DM

IN

to C

WD

M

OU

T

CW

DM

O

UT

1470

1490

1510

-1.7

AT3306G-N-1

-6.6

OP91S4S-EQ

GR

5.5km/-1.9dB

AR4001DT4030N-00TR4040-

1430

1430

1450

-1.4

OP94M5L-1-00

CW

DM

IN

to

CW

DM

O

UT

CW

DM

O

UT

1470

1490

1510

-1.6

AR4001DT4030N-00TR4040-

1450

AR4001DT4030N-00TR4040-

1470

AR4001DT4030N-00TR4040-

1490

Up to 1.5km/-.5dB

Up to 1.5km/-.5dB

Up to 1.5km/-.5dB

Up to 1.5km/-.5dB

1430

1450

-1.4

OP34D5L-0-00

CW

DM

IN

to C

WD

M

OU

T

CW

DM

O

UT

1470

1490

1510

-1.7

DR3002

DR3002

SPL ENC

SPL ENC

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

Center: 35.000 MHzSpan: 60.000 MHzRBW: 300 KHz VBW: 100 KHz Dwell: 200 µS

In-Band Power 9.881 dBmV

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

Center: 35.000 MHzSpan: 60.000 MHzRBW: 300 KHz VBW: 100 KHz Dwell: 200 µS

HFC Fiber Deep

Fault Fault

• Aurora Networks Documentation.

• Centro de investigació e innovacion en Telecomunicaciones CINIT: http://www.cinit.org.mx/articulo.php?idArticulo=54

• Encuentros Regionales. Arquitecturas Fiber Depp: http://www.encuentrosregionales.com/13conferencias/plataforma_garciabish-rosario2009_parte5.pdf