3.1 xDSL??

1
??? ????

• 3.1 xDSL??

• 3.2 ??????

• 3.3 EoC????

2
3.1.1 xDSL??
?????DSL( Digital Subscriber
Line)????????????(cooper pairs),??????????????
Digital Subscriber Line Access Multiplexer
(DSLAM)
3
?? xDSL????

• (?)   ???
• ????????,??LAN???PABX???E1??(???),Internet??,e.g
  ., VoD, Video Conferencing
• 1?????????
• HDSL(High data/bit rate conferencing, Internet
  DSL)
• 80????
• ??1.5?2.3 Mbps (??T1/E1)
• 6000??12000/18000??(0.3m)?1.8-3.6/5??)
• ???????????
• 2B1Q(2 Bits/ Quaternary Symbol?????), CAP
  (carrierless Amplitude/ Phase )

4

• 2?SDSL(Symmetric/Single copper pair DSL)
• ??128 K - 2.048 Mbps
• ???
• lt18000 feet, lt5Km
• 2B1Q

• 3?SHDSL(G991.2)(G.shdsl) ?SDSL????
• G.991.2, Feb, 2001
• ??????20(SDSL)
• 192K-2.048 Mbps
• ????,????(1.2Mbps, 20000feet/ 0.5mm)

5

• 4?IDSL(Integrated service digital network DSL)
• ?? 2BD 144kps (2B??, 1B??1B??)
• ????(always available)

• (?)????
• 1. ADSL(Asymmetric DSL)
• G.992.1
• ??upstream 16 640 kbps
• downstream 1.5M-6.1M(or 8 Mbps) 0.4mm(0.5mm)
• T1/E1 4.6km/0.4mm?? (5.5km/0.5mm??)
• 6 Mbps 2.7KM/0.4mm?? (3.7 km /0.5mm??)

6

• ????(splitter) ???
• DMT/CAP??

• 2. ??ADSL(ADSL Lite)
• G.992.2
• downstream /1.5-8 Mbps,
• upstream /500 kbps
• ?????

7

• 3. RADSL (Rate Adaptive DSL)
• ????????
• ??
• upstream 128 768kbps
• downstream 384k9.2Mbps

• 4. VDSL(Very high bit rate DSL)
• ??downstream 13-52Mbps
• upstream 1.5-2.048Mbps(????52Mbps)
• ?? 0.3 -1.5 km (2 km)
• ?????

8
??DSL????????
1) FDM (Frequency Division Multiplexing)
4k ?? ??
f
????
9
2)????EC (Echo cancellation, canceller)
4k ?? ??
f
????
????????????????,????
10
3.1.2 HDSL??
??HDSL??????
LTU Local Termination Unit
??n (lt3)
RTU Remote Termination Unit
11
(No Transcript)
12

• 3?  ???(Transceiver)
• DSP ??HDSL?????/????/?????????
• Analog Front End ??????
• Line protection/power feeding ?????????

13
??HDSL?????(??????????P155-156,??????????pp98)
14

• ?????,?????(1-3??)
• H1????(14b)H0 ??(2b)
• H2/H3/FH4??(10 b)
• H50-4??????

• ??6ms
• ???3664Kbps 16Kbps2.32Mbps
• ???1864Kbps 16Kbps1.168Mbps, ???
• ???1264Kbps 16Kbps0.784Mbps, ???
• ??1???HDSL?????
• 1421010102 412(3681)bits/6ms3220Kbps
  
• ??????????2????HDSL?????1168Kbps?

15
??HDSL??
1???? ????????(NE1/T1)
16
2?Internet/Intranet?? ????????(NE1/T1)
V.35(N64k) E1
E1 V.35
17
3????? ???????????ATM??????(Circuit
Emulation)???E1/T1?????,???????????
18
3.1.3 ADSL??
??ADSL?????? ????????
19
ADSL??????
PSTN
?????
Internet
??
Ethernet/ATM??
RJ-11
???
???
???1 ???N
ADSL 1 ADSLN
Router/ switch
gt4KHZ RF11
ADSL Modem
Ethernet (10BASE-T) RJ45
ATM??
DSLAM(ATU-C)
DSL???
ATU-R
20
ATU-C/R(ADSL Transmission Unit -Central/Remote)
21
??ADSL MODEM????
UTOPIA Universal Test of PHY Interface for ATM
22

•  1. ???? Analog frontend
• ??A/D?D/A????AGC(Automatic Gain Control)?

•  2. DMT Modem
• QAM mapper / demapper 14??/tone(16383?)
• IFFT/FFT(Inverse)
• Frequency Domain Equalizer

 3. ATM??(TC-Transmission Convergence)
23
Header HEC Cell delineation
Header HEC (only for Tx), Payload
descrambling/ scrambling
Idle cell Extraction/ Insertion
Cell Mux/ DeMux
UTOPIA Interface
????/????
OAM Cell Extraction/ Insertion
Note This block diagram has been revised on Oct.
2014
24

• 4?CTRLE??
• Modem?????????
• Configuration of a modem Line
• De-allocation of a modem Line
• operation/performance data retrieval
• defect Retrieval ????

25
??ADSL ??
BRAS Broadband Remote Access Server ???? ?????
??????

• DSLAM DSL Access Multiplexer
• RTU Remote Termination Unit,ATMFATM Forum

26
DSLAM?-?RTU?????? 1)ATM over ADSL 2)Packet
over ADSL
DSLAM??????? 1)SDH (Packet) 2) SDH (ATM) 3)
GE 4) nE1 ??WDM???????????
?,???????SDH?GE????
27

• 3.1 xDSL??

• 3.2 ??????

• 3.3 EoC????

28
3.2 HFC?????
 ??    HFC???? 1????HFC?? HFC Hybrid Fiber
coaxial cable , HFC is a shared broadcast medium
???????????????????????,????CATV?Interne
t??????/????????????? 2?????HFC????
(?????P146)
29
(No Transcript)
30
3. ??????

• (1) ??
• ??PSTN???PBX?CO?
• ???????????????????(IPTV ???)
• ??Internet/???????????
• ????????????(MCUMultipoint Control
  Unit)?VoD???
• ????SNMP(Simple Network Management Protocol)
• ?????????MODEM????Multiplexer
• CMTSCable Modem Termination Sys.,?????????,?HFC?
  ????
• (2)??????
• ?????????
• ?? 50 750MHZ
• ?? 5 200 MHZ

31

• ?????(????????)
• A.      ???? ???
• (??)
• B.      ???????????????
• C.      ??????????
• D.     ????
• ???(Set Top) ??????
• ?????(Cable Modem)??????????

32
4. ??????

• ???????????????

33
??HFC?????????-??????????
1)    ??(??)?? 5 30(42)MHz ?? 530
MHZ?????? 30 42 MHz
??????(VoD????) 2)    ????????(MHZ) 48.592
?????? 87.0108 FM?? 111550
??????(450550?????????) 550710
VoD???? 710750 ????? 7501000
????
34
????IP?HFC??
1?????
ADM Add Drop Multiplexer ?????(detailed in
Ch 5)
CATV
??1
ADM
Switch/ ??2
???PSTN
CM??
ADM
ADM
Router
HFC
ADM
Internet
????
?? PCM ??
IP?? ?? ????????
35

• ????IP???IP?????IP???Internet
• ??1??????????IP?????
• ??2????PCM????????IP?????
• Router???1???2 ? Cable Modem???????,???????

2?IP??????
?? ?? ??
????? ?? ??
RTP/RTCP

TCP/UDP/IP
PPP
SDH
DWDM ????
36

• RTP(??????)
• Real-time Transport
  Protocol,????????,????????(time stamp,??????????)
• RTCP(????????)
• Real-time Transport Control
  Protocol,????????,???????

37

• 3. ????????
• (????????)
• X over Y (over Z) (X?? ?Y?????, Y ??
  ?Z?????,studied in detail in the chapter No.8
  ??,???R1R5??????3???
• 1)SDH??????
• 2)R1-D1, D1-D5, D5-R5????
• 3)R1-O1, O1-O7,O7-O8,O8-O5,O5-R5????
• Voice over DSL (VoDSL)
• Voice over IP (VoIP)
• Packet over SDH (PoS)
• PPP over Ethernet (PPPoE)
• IP over ATM over SDH (IPoA/SDH)
• IP over Fiber (IPoF)

38
????????????????/?????????
39
 ??Cable Modem ???? 1????(STB Set-Top
Box) ????????????????? ??STB?? 1)??????(??)
2)???????? 3)????(VoD?WWW?FTP???) 2??????
???????(PC)??,???/????????
40
 ??Cable Modem??
1???????
??
FEC/ ??
??
??
MAC ??
? ? ? ?
??
? ? ?
FEC/???
?? ??
?? PDU ??
????ATM??,10/100M Ethernet??,USB ????/??????????
,????g(x) x431
41
2?MAC???? (Cable Modem Connection  )
CATV
????
???PSTN
HFC
CM ??
????
Internet
????
42
2?MAC????   1)CMTS(Cable Modem Termination
System) CMTS?CMs?Server/clients??
?????,CMs??????
  2) ????channel acquisition
??????,??QAM??,??MPEG-2??,??DOCSIS(Data Over
Cable Service Interface Specification)
??PID(Packet IDentifier)???
43
3)??????obtain upstream parameters
CM????MAC??(message) A)  Sync a common time
reference to all modems B)  UCDUpstream
Channel Descriptor C) MAP(????????)upstream
allocation MAP(??) mini-slot information that
indicates when a Modem can transmit and how long
to transmit 4)??-Ranging ??????time
reference, transmitter (frequency, power)
Req
CMTS
CMi
Confirm
44
CMTS
?????1
?????2
?????3
 t
CMi
 t
CMj
 t
?? 1)????????,??CMTS??????????? 2)
CMTS???????????? 3)???CM????CMTS???,??????? 4)??
???CMi???????CMj, CMi???CMj????,?????????
45
?????,????lt1ms,????lt10HZ,??????1/4 db
5)??IP?? ??DHCP?CM????IP???
6)??(Registration) a) DHCP (Dynamic Host
Configuration Protocol, specified by an IETF
RFC)?????????????????????IP?? b)
CM??TFTP(Trivial File Transfer protocol-????????)?
????? c) CM??????,CMTS??CM??????????????????
???,??????,??CM??.
46

• 3.1 xDSL??

• 3.2 ??????

• 3.3 EoC????

47

• ??(HFC)????????
• 1)????
• 2)????Ethernet,?????????
• CMTSCable Modem
• EPONEoC (Ethernet over Passive Optical
  Network, Ethernet over Cable)
• ??GPON (Gigabit PON)
• ??FTTH?

48
1. ???EoC?

• Ethernet over Cable ---???????????
• ?? ?????????,???????????? powerline????
  phoneline???? (??UTP-5) twisted Pairs?
• EoC ????????IP?????
• EoC ???????????????
• EoC ?RF???IP????????
• EoC ???RF????????

49
EoC??
50
EoC????
51
2. EoC??
52
??EoC????EoC,????????????75O?/???????

• ??EOC??
•     ???????802.3x,?????,??????LAN????
•     ???????/??????100O/75O???
•     IP??????0.565MHz
• ??EOC??
• ???????,??????,???????????
• ??EOC??
• ?????????,?????????????,????????10M,??????????
  ???,?????????

53
??EoC????????????/???75O?/???????
????????,?????????????????????,?????CATV?,87108MH
z??FM??,??468??167958MHz?
54
??MoCAMoCA- Multimedia over Coax
Alliance,??????????

• MoCA??
•     ????800MHz-1500MHz,??1GHz??????
•     ??????50MHz,15?????,???????270Mbps,?????????13
  0Mbps
•     ??OFDM??,TDMA/TDD
• MoCA??
•     ?????,???,?????????,???????????
• MoCA??
•     ??????,??????
•     MOCA??????????,?????????

55
??WiFi
????WI-FI??     ??????900MHz,???????????
    ?MOCA??,?????????,????????
    ?????MOCA?,?????,????WIFI??????12???????,??ON
U??4?WI-FI?? ????WI-FI??     ????,????,?????EOC
????????,???EOC??,?????????? ????WI-FI??
    ????????,?????????????
56
??HomePNA?? Home Phoneline Networking
Alliance,?????????
HPNA3.0??     ????12MHz-28MHz,??????????????????
??128Mbps,?????????80Mbps     ?????MC
QAM??,???????2-8????????????????,???QAM?????????,?
??? HPNA3.0??     ITU?????,????,?????????,?????
?? HPNA3.0?? ??????,???????
57
??HomePlug??
HomePlug?? 2001?,HomePlug1.0 14Mbps
2004?,HomePlugTurbo 85Mbps 2005?,HomePlugAV
200Mbps 2006?,HomePlugBPL 220Mbps (Broadband
Power Line) HomePlug?? ????,????,?????,??????
??? ????????,?????? ????,??????????????
??????,???????,????,??????
?????????,?????????????? ???????,???????, ????
58
3. ??????
59
???? HomePNA WiFi HomePlug MoCA/C-LINK ??EoC
???? ??? ??? ??? ??? ???/???
??? ITU G.9954 802.11/g/n HomePlug AV MoCA 1.0 802.3
???? FDQAM/QAM OFDM/BPSK, QPSK,QAM OFDM/???QAM??? OFDM/???QAM??? ??Manchester??
???? 4-28MHz 2400MHz ??? 2-28MHz 800-1500MHz 0.5-25MHz
???? 24MHz 20/40MHz 26MHz 50MHz 25MHz
???? 1 13 1 15 1
?????(Mbps) 128 ?? 54/108 ?? 200 ?? 270 ?? 10 ??
MAC ???(Mbps) 80 ?? 25 ?? 100 ?? 135 ?? 9.6 ??
MAC ??? CSMA/CA CSMA/CA CSMA/CA,TDMA CSMA/CA,TDMA CSMA/CD
????? 16 ?32/64 32 ?? 16 ?32 31 ????/????????
QoS HPNA 3RQoSGQoS WiFi WME(? ????) QoS-gt 802.1d AnnexH.2 8 ?802.1D ??? ???2 -3 ???? 802.1d Annex H.2
?? lt30ms lt30ms lt30ms lt5ms lt1ms
?? ???????????,????????? ??1????,????? ??????,????? ???????,????? ???????????,????????? ?????????? ?????, ?VLAN ?QoS ???????? . ???????????,???????? ?????? ? ???? ??????? ?????????Ethernet??,????
60
4. ????
61
??EoC??
Erbium-Doped Fiber Amplifier (EDFA)???????
62
??EoC??
63
??EoC?? STBSet Top Box,???
????
?????????
????
????
????