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 Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6
SG 9 area of responsibility ITU-T Lead S tudy Group on integrated broadband o cable and television networks. HFC / FTTH HFC / FTTH Broadband network Broadband network J-series recommendation for ! 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 I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 2
Broadband access rapidly increasing in Japan ITU-T Million cablemodem 25 22.3 million DSL FTTH 18.6 million As of Dec. 2005, 20 Cable 3.2 million 13.6 million 1 5 DSL 14.4 million FTTH 4.6 million 7.8 million 1 0 5 0 2002 2003 2004 2005 Dec Dec Dec Dec 22 million subscribers, around 44 % of households, enj oy broadband Internet application. I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 3
Trend of Broadband I nternet connection in Japan ITU-T SG9 issues covering 35 % FTTH DSL 3% cablemodem 1 4% 2 1 % 25% 65% 72% 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. I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 4
Broadband services ITU-T “Triply Play” o High speed Internet connection o Voice over IP (VoIP), IP video telephony o Broadcasting Program distribution , Video on Demand(VoD) • MPEG-2 TS over IP packet S et-top box should play the key role as a virtual gateway to the home network. I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 5
Protocol stack of m ulti-channel video distribution system over I P netw ork ITU-T Data ECM PSI Audio EMM SI Video carrousel Application Section PES Data MPEG-2 TS RTP (optional) TCP/UDP Transport/Network IP Data link Ethernet, DOCSIS etc. Physical Media Optical fiber, Coax, HFC, Metallic Local Line etc. I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 6
Transport technology in cable netw ork ITU-T o Cable TV on HFC/ coax o IP over FTTH system • J.83 • G.983 series —MPEG-2 TS on 64/ 256QAM —Physical layer —Digital broadcasts modem • J.281 • J.112 —Requirement for multichannel video —IP over TS on QAM transmission —QPS K/ 16QAM for US • J.mcvif-arch —DOCS IS 1.1 —Architecture of • J.122 multichannel video —QPS K/ 16QAM/ 64QAM for US transmission —DOCS IS 2.0 • J.stb-core-arch —Core architecture of IP based set-top box I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 7
Discussion on STB technology ITU-T STB for FTTH - - high speed I P high speed I P STB for FTTH 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 To be specified To be specified - 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 - I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 8
Recom m endations approved and w ork in progressing in SG9 for video signal distribution over I P-based netw ork ITU-T J.241 Quality of service ranking and measurement methods for digital video services delivered over broadband IP networks (Approved in 2005-04) J.281 Requirements for multichannel video signal transmissions over IP-based fiber network (Approved in 2005-03) J.mcvif-arch Architecture of multi-channel video signal distribution over IP-based network J.stb-core-a Core architecture functionality of next-generation STB J.stb-mi-a Core architecture functionality of a next generation STB that is not dependent on the transport media J.stb-cable-a Cable network architecture component of the next- generation STB I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 9
High speed technology for cable TV and feasibility study ITU-T o High density modulation in the same bandwidth 1024 QAM 1024 QAM 256 QAM 256 QAM 50Mbps 64 QAM 64 QAM 40Mbps 30Mbps I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 0
High density m odulation for expanding channel capacity ITU-T (Mbps) 15 1024 QAM 50 Shannon's limit bits/s/Hz 4096QAM 256 QAM 40 10 1024QAM 256QAM Rec. J.83 64 QAM 30 64QAM 5 20 30 40 50 CNR [dB] （ 6MHz bandwidth ） Required CNR and spectrum efficiency. (BER = 1E-4 and rolloff is 0.13.) After the analog broadcast channels are switched off, the capacity can be increased by high density QAM. I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 1
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) ITU-T Hybrid Fiber and Coaxial (HFC) system - 770MHz Tap off Optical fiber transmission Coaxial cable 1024 QAM Receiver 1024 QAM E/O O/E modulator HFC node 1024 QAM transmission channel center frequency 623 MHz its communications Inc. Kanagawa Japan I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 2
BER perform ance of 1 0 2 4 QAM transm ission in cable TV system s ITU-T 10 -1 1024 QAM Theory 10 -2 B-to-B w/o FEC B-to-B RS(204,188) CableTV, w/o FEC 10 -3 10 -4 BER 10 -5 10 -6 10 -7 10 -8 10 -9 30 35 40 45 CN ratio [dB] 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.) I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 3
On going draft specification for DOCSI S 3 .0 m ultiple channels bonding technology ITU-T Reception and restoring the original fast packet stream Subscriber STB with multiple tuners 100 Mbps or more 6 MHz 6 MHz 6 MHz 6 MHz 30 Mbps 30 Mbps 30 Mbps 30 Mbps 64 QAM 64 QAM 64 QAM 64 QAM Dispersion (segment, sequence), and transmission by multiple-QAM channels Headend I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 4
Sum m ary ITU-T o 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) o Critical issues in Home Network and Transport —Domain control and Digital Rights Management (DRM) —Quality of S ervices (QoS ) definition o S G9 S tandardization focusing on —Digital video distribution systems for broadcast services —S et Top Box technology in the integrated broadband cable networks I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 5
ITU-T Related Questions in SG9 I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 6
Questions on STB and transport issues 1 / 2 ITU-T Question 5/9 - How will broadcast and IP o 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 I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 7
Questions on STB and transport issue 2 / 2 ITU-T Question 12/9 - Which mechanism or o 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 I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 8
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