Outline

1
????????????

• ??????????
• ???
• ????99?8?26?

2
Outline

1. ????????
2. ??????????
3. ????????????
4. HFC????

3
????????(1/6)

• ????????(Digital Video Broadcasting
  Cable,??DVB-C)
• ????????????????????????????DVB-C?DVB-S???
• ????????,???????????ITU-T J.83??????????????????
• ?J.83A(??)?J.83B(??)?J.83C(??)?
• ????????,????DVB-C????,?DTV-C?

4
????????( 2/6 )

• ?????????????2001??????????????????????(GY/T
  170-2001),?????ITU-T J.83???IEC
  60728-9?????????????????9??

5
????????( 3/6 )

• 2006?11???2007??????????????????????(GY T
  221-2006),????????????????????????????????,???????
  ???,????????????
• 2007?????????????????????(???)??????????(GY J
  12-2007)??????????????

6
????????( 4/6 )
?? ITU-J.83A ITU-J.83B ITU-J.83C
???? 8/7 MHz 6 MHz 6 MHz
???? QAM QAM QAM
???? MPEG2 (H.264) MPEG2 (H.264) MPEG2 (H.264)
???? ?? ?? ??
???? ?????? ??????? 51 ??????? 37 3????? ?????? 90 ??????? 689? ???????578?
7
????????(5/6 )

• ITU-J.83C Roll-off factor0.13 TW r0.15
• Roll-offI?Q??,????????
• ????????????????
• ???roll-off factor ???,?transition bandwidth
  ??,?stopband attenuation????
• Roll-off???CATV??CSO ?CTB ??

8
????????( 6/6 )

• ???????????????
• ??Cable Modem ???????????Open Cable????????DOCSIS
  ??,????ITU J.83B?
• ??DVB-C????????????????(ETSI)??DVB??????,???ITU
  J.83A/C
• ?????????? DVB-C??,????Open Cable????????DOCSIS??C
  able Modem?IPTV?????

9
??????????
10
??????????(1/3)
????Bart Brusse, The DVB Project and DVB-C2 -
An Introduction, DVB-C2 Face-2-Face meeting,
Denver, CO, 10 February 2010
11
??????????(2/3)
????Bart Brusse, The DVB Project and DVB-C2 -
An Introduction, DVB-C2 Face-2-Face meeting,
Denver, CO, 10 February 2010
12
??????????(3/3)

• ???2011-2013???????????
• DVB -CM - C2 2007?9??????2008??????
• ??????????????????
• ????(gt30)
• ?????DVB-C,???????????????
• ???????Euro DOCSIS

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(No Transcript)
14
???????????
??
??
??
??
15
?????????
??
??
??
??
??
16
????????????????
ADSL
FTTX
CM
Wireless
17
????????????
18
????????????

• Better modulation codes (??????)
• Network segmentation(????)
• Switched Digital Video (??????)
• Statistical multiplexing (????????)
• Extensions beyond 1 GHz(????1GHz)
• Analogue switch-off(??????)

19
??????(1/4)

• ??DVB-C EN 300-429,??roll-off factor ,
• a 0.15?Square Root Raised Cosine ???,6 MHz
  ??????????????(maximum symbol rate)?
• ??64 QAM (6 bits/symbol),???????(maximum raw bit
  rate)?
• ??256 QAM (8 bits/symbol)

MBaud
MBps
MBps
20
??????(2/4)

• ???????(204,188)????????(Reed-Solomon
  code)???????,??MPEG-2 ????(Transport
  Stream,????TS)????????(net bit rate)?

Mbps (64 QAM)
Mbps (256 QAM)
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??????(3/4)

• ??MPEG-2?????????3-4Mbps
• ??MPEG-2????????13-14Mbps
• 64 QAM????? 7???
• 256QAM????? 12???

22
??????(4/4)

• ??MPEG-4?????????1.5-2Mbps
• ??MPEG-4????????7-8Mbps
• 64 QAM????? 13???
• 256QAM?????20???
• ??H.264 ????????MPEG-2
• ?64 QAM?????254 QAM????
• ???????2.7?(1.332)?

23
????

• ??????????-??????
• ???Fiber node ??????????????
• ????,????,?????????

24
??????(1/2)

• Switched Digital Video
• ??????????????????
• SDV?????????????HFC??
• SDV??DOCSIS?VOD??????,????????????????(QAM)??

25
??????(2/2)

• Statistical Remultiplexing??????????(TS)?????????
  ??????????

26
????????

• Statistical multiplexing?????????????????,???????
  ??
• ?Constant Bit Rate,CBR?????????,????????
• ?Variable Bit Rate,VBR?????????????????

27
???1GHz

• HFC 750MHz ?????860MHz ?1GHz
• ????750MHz???860/870MHz,????110-120MHz,???????????
  
• ?????????860MHz
• ?????????????TAP ?????860MHz
• ??????????????

28
??????
29
??

• ??HFC DOCSIS?????,??????????????????????????????
• HFC????????,??HFC???????FTTB??
• ??????????
• 1. ?????
• 2. ??DOCSIS 3.0??
• 3. ??FTTx?????FTTx EOC/VDSL?
• 4. ??????,??256QAM???????
• 5. ??H.264????,????????
• 6. ??VBR????,????????
• 7. ??????????860MHz/1GHz

30
HFC????
31
HFC????(1/6)

• DOCSIS3.0 ??????
• ??RF??????,???1?RF??????????,?DOCSIS
  3.0???channel bonding?????????,????????

32
HFC????(2/6)

• ??EPON ?GEPON??
• ???????????(100Mbps)???????
• HFC??(DOCSIS)?GEPON overlay ??,???????????

33
HFC????(3/6)

• FTTX EOC??PON ??,???????,??Ethernet over
  Coaxial ?????,?????????????????

34
HFC????(4/6)

• FTTX EOC(Ethernet over Coax,EoC),??????????????
  ???????,????????????????
• MoCA (Multimedia over Cable Alliance)??Entropic???
  (c-link)??MoCA 1.0?????,?????800MHz1500MHz???
• HPNA (Home Phone Networking Alliance)?????????????
  ?????????????4MHz28MHz???,????????128Mbps????????
  ?????????????,???????????(RG-6),???????????

35
HFC????(5/6)

• MoCA
• ???????(Multimedia over Coax Alliance)???2004?1?
• ????Panasonic?verizon?RasioShack ?Linksys
  ?Conexant ?EchoStar ?Entropic?Motorola ?
  Toshiba?Actiontec

?????????????
????http//www.mocalliance.org/
36
(No Transcript)
37
HFC????(6/6)

• Home PNAITU????HomePNA 3.1???????????

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Thanks for your attention!Q A