Broadband access technology and standardization for integrated cable - - PowerPoint PPT Presentation

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Broadband access technology and standardization for integrated cable - - PowerPoint PPT Presentation

Jan 30, 2023 251 likes •447 views

I nternational Telecom m unication Union ITU-T Broadband access technology and standardization for integrated cable TV networks Naoyoshi NAKAMURA Japan Broadcasting Corporation NHK (Nippon Hoso Kyokai) I TU-T W orkshop NGN and its

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I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6

I nternational Telecom m unication Union

ITU-T

Broadband access technology and standardization for integrated cable TV networks

Naoyoshi NAKAMURA

Japan Broadcasting Corporation NHK (Nippon Hoso Kyokai)

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ITU-T

SG 9 area of responsibility

  • Lead S

tudy Group on integrated broadband cable and television networks.

J-series recommendation for

HFC / FTTH Broadband network HFC / FTTH Broadband network

! Primary / Secondary program distribution ! Audio-visual quality measurement ! API for interactive TV applications ! Set-top box technology, Home networking interface ! Transmission system, LSDI, Real-time video and audio, VoIP

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ITU-T

Broadband access rapidly increasing in Japan

22 million subscribers, around 44 %

  • f households,

enj oy broadband Internet application.

5 10 15 20 25

2002 Dec 2003 Dec 2004 Dec 2005 Dec

cablemodem DSL FTTH

Million

As of Dec. 2005, Cable 3.2 million DSL 14.4 million FTTH 4.6 million

7.8 million 22.3 million 13.6 million 18.6 million

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ITU-T

14% 21% 65%

3% 25% 72%

FTTH DSL cablemodem

Trend of Broadband I nternet connection in Japan

2002 3Q Total 7.8 million 2005 3Q Total 22.3 million

The ratio of FTTH users has become almost 7 times (3 %

  • -> 21 %

) within a period of 3 years.

SG9 issues covering 35 %

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ITU-T

Broadband services

“Triply Play”

  • High speed Internet connection
  • Voice over IP (VoIP), IP video telephony
  • Broadcasting Program distribution , Video on

Demand(VoD)

  • MPEG-2 TS
  • ver IP packet

S et-top box should play the key role as a virtual gateway to the home network.

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ITU-T

RTP (optional)

Data link Physical Media

Ethernet, DOCSIS etc. MPEG-2 TS Optical fiber, Coax, HFC, Metallic Local Line etc. TCP/UDP

Application Transport/Network

IP ECM EMM PSI SI Data carrousel Audio Video PES Section Data

Protocol stack of m ulti-channel video distribution system over I P netw ork

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I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 7

ITU-T

Transport technology in cable netw ork

  • Cable TV on HFC/ coax
  • J.83

—MPEG-2 TS

  • n 64/ 256QAM

—Digital broadcasts modem

  • J.112

—IP over TS

  • n QAM

—QPS K/ 16QAM for US —DOCS IS 1.1

  • J.122

—QPS K/ 16QAM/ 64QAM for US —DOCS IS 2.0

  • IP over FTTH system
  • G.983 series

—Physical layer

  • J.281

—Requirement for multichannel video transmission

  • J.mcvif-arch

—Architecture of multichannel video transmission

  • J.stb-core-arch

—Core architecture of IP based set-top box

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I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 8

ITU-T

Discussion on STB technology

Common part Common part

STB for J.8 3 cable TV ( HFC) system STB for J.8 3 cable TV ( HFC) system Com m on part including Com m on part including

  • Video, Audio codecs

Video, Audio codecs

  • APIs

APIs

  • Conditional Access System

Conditional Access System

  • Transport packet format

Transport packet format

  • QoS scheme (In home network)

QoS scheme (In home network)

  • Service Information

Service Information

  • Downloadable functionality

Downloadable functionality STB for FTTH STB for FTTH -

  • high speed I P

high speed I P To be specified To be specified

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ITU-T

Recom m endations approved and w ork in progressing in SG9 for video signal distribution over I P-based netw ork

Core architecture functionality of next-generation STB J.stb-core-a Core architecture functionality of a next generation STB that is not dependent on the transport media J.stb-mi-a Cable network architecture component of the next- generation STB J.stb-cable-a Architecture of multi-channel video signal distribution

  • ver IP-based network

J.mcvif-arch Requirements for multichannel video signal transmissions over IP-based fiber network (Approved in 2005-03) J.281 Quality of service ranking and measurement methods for digital video services delivered over broadband IP networks (Approved in 2005-04) J.241

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ITU-T

High speed technology for cable TV and feasibility study

  • High density modulation in the same bandwidth

64 QAM 64 QAM 256 QAM 256 QAM 1024 QAM 1024 QAM

40Mbps 50Mbps 30Mbps

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ITU-T

High density m odulation for expanding channel capacity

50 256 QAM （6MHz bandwidth） (Mbps) 40 30 64 QAM 1024 QAM

  • Rec. J.83

Required CNR and spectrum efficiency. (BER = 1E-4 and rolloff is 0.13.) 20 30 40 50 5 10 15 CNR [dB] bits/s/Hz

Shannon's limit 64QAM 256QAM 1024QAM 4096QAM

After the analog broadcast channels are switched off, the capacity can be increased by high density QAM.

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ITU-T

1 0 2 4 QAM field trial in com m ercial cable TV system in January 2 0 0 3 ( by NHK STRL and TAO) its communications Inc. Kanagawa Japan

O/E E/O

Tap off

Optical fiber transmission

HFC node

Coaxial cable Hybrid Fiber and Coaxial (HFC) system - 770MHz 1024 QAM modulator 1024 QAM Receiver 1024 QAM transmission channel center frequency 623 MHz

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ITU-T

BER perform ance of 1 0 2 4 QAM transm ission in cable TV system s

30 35 40 45 10-9 10-8 10-7 10-6 10-5 10-4 10-3 10-2 10-1 BER CN ratio [dB]

1024 QAM Theory B-to-B w/o FEC B-to-B RS(204,188) CableTV, w/o FEC

The results show that 1024 QAM cable TV transmission for video distribution can be achieved with the CN ratio of 38 dB or more at the consumer premises. (The STB was prototype receiver.)

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ITU-T

On going draft specification for DOCSI S 3 .0 m ultiple channels bonding technology Dispersion (segment, sequence), and transmission by multiple-QAM channels

30 Mbps 64 QAM 30 Mbps 64 QAM 30 Mbps 64 QAM 30 Mbps 64 QAM

6 MHz 6 MHz 6 MHz 6 MHz

Reception and restoring the original fast packet stream

STB with multiple tuners

Headend Subscriber

100 Mbps

  • r more
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ITU-T

Sum m ary

  • Distribution of High Definition TV(HDTV) is a key

role for future service via broadband access network

—Cable TV system (traditional type, HFC is typical) —FTTH-high speed IP (Video distribution using TDM, Ethernet technology)

  • Critical issues in Home Network and Transport

—Domain control and Digital Rights Management (DRM) —Quality of S ervices (QoS ) definition

  • S

G9 S tandardization focusing on

—Digital video distribution systems for broadcast services —S et Top Box technology in the integrated broadband cable networks

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ITU-T

Related Questions in SG9

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ITU-T

Questions on STB and transport issues 1 / 2

  • Question 5/9 -How will broadcast and IP

based service reception, via connection to the access network, be integrated into the next generation set-top box with connectivity to the home network ?

  • DNRs in progress are related to next

generation S TB architecture

— J.stb-core-arch — J.stb-cable-arch — J.stb-mi-arch

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ITU-T

Questions on STB and transport issue 2 / 2

  • Question 12/9 -Which mechanism or

interface can be used to coordinate digital video systems with optical access and core networks ?

  • DNRs in progress are

— J.mcvif-arch — Architecture of multi-channel video signal distribution over IP-based network