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(1)

1550 Video Overlay

for FTTH

The New “Old Reliable”

(2)

Presentation Overview



Background of Overlay in PON



Deployment Architecture



Active Components



Redundancy



RF Video Overlay Capacity



Looking Forward

(3)

Video Overlay in General PON Specifications



1550-1560 nm downstream optical signal transmitting a RF spectrum of frequency

multiplexed subcarriers.



Compatible with BPON, GPON, GEPON, 10GE PON (future)

(4)

1550 Overlay in Context



Purpose of video overlay: Comprehensive triple play

Eases the introduction digital sustained data rate applications, like IP video, without changing the

end user’s viewing pattern or Quality of Experience (QoE.)



Immediately available video solution



Video overlay is an important discussion in the FTTH conversation.

83 % of FTTH deployments in North America.



1550 video overlay is a friendly technology for PON, PON is ideal platform for RF

transmission.

Used in HFC for many years.

Conceptual and hardware understanding is mature.

Powerful in PON because optics do not have to contend with coaxial plant



Ideal for general broadcast:

Information that is intended to be received by all ONUs of many OLTs.

ABC, NBC, FOX, etc..



Can be optimized for directed broadcast (multicast):

Information that is intended to be received by all ONU’s of one or few OLTs

PEG channels, (local city or village channel)



Limited use for narrowcast (unicast):

(5)

Presentation Overview



Background of Overlay in PON



Deployment Architecture



Active Components



Redundancy



RF Video Overlay Capacity



Looking Forward

(6)

Components of 1550 Overlay



Transmitter:

Electrical to optical transition point. Includes distortion compensation for linearity requirements, Stimulated

Brillioun Scattering suppression for high launch powers into fiber.



Optical Amplifier Sequence:

Large optical powers needed for distribution. Most cost sensitive item

in a 1550 video overlay.

Key difference from legacy RF video networks is optical amplifier capacity

Output power requirements (14 – 20 dBm) to maintain link budget paramenters at the ONT (25 - 28 dB)



Passive components

WDM: Optical integration point of VOLT (Tx+Amp) and OLT.

PON splitter: High count splitter



ONT Video Receiver

(7)

Overlay Architecture (A)



Edge Modulation

Edge of IP Ring (central office,CO)

(8)

Overlay Architecture (B)



Supertrunk Modulation

VOLT is

not

collocated with OLT. Could be separated by up to

100 km.

(9)

Presentation Overview



Background of Overlay in PON



Deployment Architecture



Active Components



Redundancy



RF Video Overlay Capacity



Looking Forward

(10)

Transmission



Typical Amplitude Modulated Transmitters



Output power between 5 – 10 dBm



SBS suppression between 15 – 23 dBm for PON

(11)

EDFA

EDFA

Cladding Pumped

Cladding Pumped

Single-stripe

Laser Pump

Multimode

Laser Pump

EDFA

(12)

Reception



Optical triplexer decouples 1550 nm signal to



1550 optical input targets depend on analog and QAM

channel mix

Targets range from -4 to -14 dBm.



Absolute RF output powers depend on AGC functions'

specified by operator

(13)

Presentation Overview



Background of Overlay in PON



Deployment Architecture



Active Components



Redundancy



RF Video Overlay Capacity



Looking Forward

(14)

Edge modulation redundancy level 1



No redundancy:

99.998780%

6.8030 min/year



Network Availability:

99.999153%

4.4540 min/year



Post Amp: 18 outputs, PON-amp: 24 outputs

432 PONS ~ 13,800 homes

(15)
(16)

Presentation Overview



Background of Overlay in PON



Deployment Architecture



Active Components



Redundancy



RF Video Overlay Capacity



Looking Forward

(17)

RF channel characteristics



Typical RF channel line up:

20 – 80 analog channels, 256 QAM channels up to 1 GHz.

Certain operators have opted for an all QAM line up.



Well defined figures of merit

Analog: Carrier to Noise / Second / third order harmonic distortions.

CNR / CSO / CTB

(18)

Bandwidth Expectations for TV usage

50.0

29.0

22.0

15.0

12.0

8.0

Total Mbps required

32 Home PON

Gbps

HD Video

SD Video

Internet

MPEG4

1.5

1.0

0.7

0.5

0.4

0.3

46.0

21.0

14.0

7.0

----4.0

4.0

4.0

8.0

4.0

4.0

4.0

4.0

4.0

4.0

4.0

4 HDTV,

2 DVR

2 TVs + 2

HDTV

With DVR

2 TVs + 1

HDTV

With DVR

2 TVs +1

HDTV

3 TVs, 1

DVR

2 TVs, no

DVR

Assumptions:

112.0

66.0

48.0

30.0

20.0

12.0

Total Mbps required

32 Home PON

Gbps

HD Video

SD Video

Internet

MPEG2

3.5

2.1

1.5

1.0

0.7

0.4

108.0

54.0

36.0

18.0

----8.0

8.0

8.0

16.0

8.0

4.0

4.0

4.0

4.0

4.0

4.0

4 HDTV,

2 DVR

2 TVs + 2

HDTV

With DVR

2 TVs + 1

HDTV

With DVR

2 TVs +1

HDTV

3 TVs, 1

DVR

2 TVs, no

DVR

(19)

Video Delivery Capacity and Scalability



Sustained bandwidth vs. best effort

Not just Bit speed but quality of throughput

Latency, jitter, packet loss, sequence errors, security verification

EPON with 32 users

40 Mbps

BPON with 32 users

GPON with 32 users

20 Mbps

80 Mbps

6 Gbps

6 Gbps

6 Gbps

(20)

Presentation Overview



Background of Overlay in PON



Deployment Architecture



Active Components



Redundancy



RF Video Overlay Capacity



Looking Forward

(21)

Looking forward

(22)

Presentation Overview



Background of Overlay in PON



Deployment Architecture



Active Components



Redundancy



RF Video Overlay Capacity



Looking Forward

(23)

Conclusion



Purpose of video overlay: Comprehensive Triple Play

To ease the burden on OLTs for sustained data rate applications, like

video, without changing the end user’s viewing expectation.



Friendly technology for transmission of Broadcast Video in PON

Dedicated bandwidth

Limited use for narrowcasting



Cost effective video delivery

(24)

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