SDH????????

1

• SDH????????

2
SDH????

• ? ?
• ? ? ?
• VC ?????
• ? ? ? ?
• ? ? ?
• ? ?
• ? ?
• SDH??????????
• ? ? ? ?

3
SDH????

• SDH? ?

4
SDH??
S
S ynchronous ? ?
D
D igital ? ?
H ierarchy ? ?
H
5
SDH??
???????
??????
??????
???????????????????TS,???????????,?????????,??????
???????????????????
6
SDH??
?? ???????????????? ????????????,??????? ????
7
SDH??
P lesiochronous
???
P
Plesio ??????,??????
??
D
D igital
H ierarchy ? ?
H
8
SDH??
9
SDH??
10
SDH??
DDF
DDF(??????? )
DDF
DDF
VDF

1
??? 2/8M MUX
??? 8/34M MUX
??? 34/140M MUX
PCM ??
??? ??
.
2 M
8 M
34 M
140M
2
. .
30
2M
?????
??? ??
??PDH???????
11
SDH??
12
SDH??

• SDH?PDH???????
• ?????
• ???????????????
• ??????
• ????????????
• ??????????
• ??????????????????
• ??????

13
SDH??
PDH???????? ????,????
?????????????,????? ?????????,??????????,?????????
?????
SDH???????? ????,????
?????????,?????????? ??,??????????????
14
SDH??
15
SDH??
?????????(?? PDH??)
1962?,?? PCM-24
1948?, ?????
1965?,?? PCM-24
1968?,?? PCM-30
????? ????
16
SDH??
?????????(PDH SDH)
17
SDH??
SDH???(?) .????.

• ??????
• ?????????????????

18
SDH??
SDH???(?) .????.

• ????????

???? (Fault management) ???? (Configuration
management) ???? (Performance management) ????
(Security management) ???? (Accounting
management)
19
SDH??
SDH???(?) .?????.

• ???????

• ??????

20
SDH????
SDH???
21
SDH???
?? 2.048Mb/s 8.448Mb/s 34.368Mb/s 139.264Mb/s
?? 1.544Mb/s 6.312Mb/s 44.376Mb/s
?? 1.544Mb/s 6.312Mb/s 32.064Mb/s 97.728Mb/s
PDH G.702
STM-1 155 .520Mb/s
? ? ?
STM-4 622.080Mb/s
SDH G.707
STM-16 2488.320Mb/s
STM-64 9953.280Mb/s
? 1??????SDH?????PDH????
2?SDH??????51.84Mb/s???????????SDH??
????????,????SDH????NNI??,?STM-0,?
????SDH?????????.
22
SDH???
SONET/SDH??
??
???
???
CCITT??
OC-1 OC-3 OC-9 OC-12 OC-18 OC-24 OC-36 OC-48
STS-1 STS-3 STS-9 STS-12 STS-18 STS-24 STS-36 STS-
48
51.84 155.52 466.56 622.08 933.12 1244.16 1866.24
2488.32
STM-1 STM-3 STM-4 STM-6 STM-8 STM-12 STM-16
23
SDH????

• VC ?????

• ? ? ? ?

• ? ? ?

24
VC ?????
??????SDH ????? ??????????????
?????????????????????, ????????
???????ITU-T?????????,???? ???????????,???????????
, ????????
25
VC ?????
26
VC ?????
???(?)

• ???---Virtual container---VC
• ???PDH ??????????VC
• ?????(????)--Lower order VC
• 1.5Mb/s---------------VC-11
• 2Mb/s-----------------VC-12
• 6.3Mb/s---------------VC-2
• ?????(????TU?TUG??)
• --Higher order VC
• 34Mb/s?45Mb/s-----VC-3
• 140Mb/s-----------------VC-4

27
VC ?????
???(?)
??,??????????????????
?????, ??VC???????????????
28
????
??????????
139264kb/s
?N
?1
STM-N
AU-4
VC-4
AUG
C-4
?3
?1
TUG-3
TU-3
VC-3
?3
44736kb/s 34368kb/s
C-3
AU-3
VC-3
?7
?7
6312kb/s
?1
TUG-2
C-2
TU-2
VC-2
?3
2048kb/s
VC-12
C-12
TU-12
?4
1544kb/s
C-11
TU-11
VC-11
29
????
???SDH??????(??????????)
STM-1
AUG
139264kb/s
?N
?1
STM-N
AUG
AU-4
VC-4
C-4
?3
?1
TU-3
VC-3
TUG-3
44736kb/s 34368kb/s
C-3
?7
TUG-2
????
?3
2048kb/s
VC-12
TU-12
C-12
??
?????
??
30
STM-1????
????
...
...
. . .
125us
(1)
(2)
(9)
270 bytes
????????
261
9
261
RSOH
3
TU Pointer
POH
POH
AU PTR
1
POH
P O H
9
MSOH
5
??? (Payload )
1
2
VC-4
63
31
STM-1????
9?N
261?N
RSOH
3
1
AU PTR
MSOH
5
125us
32
SDH??????(????????)
????( ?)
????
regenerator section(???)-------??NE??????? multipl
ex section (???)-------??LT????????? path(??)----
----??PDH????(???)?????
NE 1
NE 2
NE 3
NE 4
RS
RS
section 1
section 2
section 4
REG
NE
NE
NE
MS
section 3
MS
path 1
path 2
Path
Section/TS
Section/TS
PDH??
PDH??
33
SDH??????(????????)
34
SDH??????(????????)
????(?)
SDH????????????
????SDH???????,????????????????????????,SDH???????
??????,?????????????????
(???)
35
SDH????

• ? ?

• ? ?

36
???????
SDH????????AU PTR ? TU PTR AU-4 PTR
?VC-4 ?? TU-12 PTR?VC-12??
37
???????
????
AU-4???????(?)
H2
1
1
H3
H3
H3
H4
H4
H4
H1
Y
Y
N N N N S S I D
I D I D I D I D
???
??
10????? I?????? D?????? ?????????1 ??1??,
10????????0-1023,?AU-PTR?????0-782????,?????,???8?
????????NDF?,??AU-LOP
?????(NDF) 0110 ?????? 1001 ??????
????????? ?????????,???NDF??????0110,?3???????????
??
38
?????
?????????,?SDH????????? ????????VC????,???????
SDH?????? ???????????,????? 1??????(????) 2?????
?(?????????)
39
?????
...
...
...
H1 Y Y H2 1 1 H3 H3 H3
...
...
VC-4
...
...
...
...
?????
...
...
H1 Y Y H2 1 1 H3 H3 H3
...
...
I????
...
VC-4
...
...
...
...
...
H1 Y Y H2 1 1 H3 H3 H3
...
...
VC-4
...
...
...
??????
40
?????
...
...
...
H1 Y Y H2 1 1 H3 H3 H3
...
...
VC-4
...
...
...
...
...
?????
...
H1 Y Y H2 1 1
...
...
D????
...
...
VC-4
...
...
...
...
H1 Y Y H2 1 1 H3 H3 H3
...
...
VC-4
...
...
...
??????
41
?????
?????????,???VC-4???AU-4???? ???????????,??
???????????? ???????????,?????????????? ?????,????
?????????,????????????1??1??????????,??????VC4????
,????????? ??,?????????AU???VC??????? ???,??V
C ?AU????,??VC?AU?TU????? ???????????
????,????SDH?????????,???? ???????SDH???????
42
??(???)
9
261
A1
A1
A1
A2
A2
A2
J0
B1
E1
F1
D3
D1
D2
9
???
B2
B2
B2
K1
K2
D4
D5
D6
D7
D8
D9
D10
D11
D12
S1
M1
E2
Z1
Z1
Z2
Z2
STM-1
?1?? ?????????, ?????????????
2???????????????
43
??(???)
????5??????A1?A2 ??,???OOF????? ??OOF????????, ??
???LOF?? ????
A1, A2
???
C1STM ???
C1(J0)
J0?????
RS
B1
BIP-8
E1
??
F1
????
D1-D3
DCCr
B2
BIP-NX24
K1, K2
APS, MS-AIS, MS-RDI(FERF)
D4-D12
DCCm
MS
????
S1
Z1,Z2
????
M1
?REI(FEBE)
??
E2
44
??(???)
K1(b1b4) ?????? K1(b5b8)????????
??????? K2(b1b5)?????????
????????? ????????? K2(b6b8)??
???,??? ?????????
????????
45
??(???)
144?
A1
A1
A1
A1
A1
A1
A2
A2
A2
A2
A2
A2
J0
Z0
E1
F1
B1
D3
D1
D2
9?
B2
K2
B2
B2
B2
B2
B2
K1
D4
D5
D6
D7
D9
D8
D10
D11
D12
S1
Z1
Z1
Z1
Z1
Z2
Z2
Z2
Z2
M1
STM-16 SOH
46
??(??????)
260
1
J1
B3
J1
??????
C2
HPOH
B3
??BIP-8
G1
C2
????
F2
???? ( REI 1-4,RDI5)
G1
H4
F2,Z3
????
Z3
H4
??????
K3
K3(1-4)
APS
N1
N1(Z5)
???????,??????
VC-4
47
??(??????)
V5
35
1-2, BIP-2
125?S
J2
V5
3, REI(???????)
LPOH
4, RFI(??????)
5-7, ????
N2
8,RDI (??????)
J2
??????
???????,??????
N2(Z6)
K4
K4
APS
500?S
VC-12
48
SDH????

• SDH??????????

49
(No Transcript)
50
(No Transcript)
51
(No Transcript)
52
(No Transcript)
53
(No Transcript)
54
? ???????????
TE
TE
REG
???
TE
ADM
ADM
TE
??(??)
ADM
??
A D M
A D M
????? ???????
ADM
55
????????
TE
ADM
REG
????
TE
TE
TE
ADM
A D M
A D M
ADM
????
ADM
56
(No Transcript)
57
(No Transcript)
58
(No Transcript)
59
?????????????????
APS (Automatic Protection Switching)
1n
(?11)
1n???????????, 11???????????
?????
APS
??????????????????
??????,????????
W1Wn???????P1Pn
11
??????
??????????????????
???????,???????
????W1Wn???????P1Pn
?????
????? ???????,??????
???????(WTR)????
(NEC????WTR?300?,?????????)
??????????????
60
?????????????????
APS??
1.????????????????????,?
????SF?SD???????????????
???,?????(FSW)?????(MSW)
2.???????????????????K1?K2,
???????????????????K1??
?????????,K2??????????? ????
3.APS????????(??K1?K2???????
????)???50ms?
4.???????,??K1?K2???ADM????
K1?K2????????ADM???,????? ADM,
K1?K2????????
5. ?????????11????,???? K1?K2
?????????????????????
61
?????????????????
11?????
STM-N ???????????????????, ????????????????
?????? ?,????????????????,??? ???????????
62
?????????????????
1n?????
n?????????????,????????? ??????????????,??
???,????? ?????,??????,????????????
11???????????????????,???? ????11??
63
?????
?????
2F USHR/PPS
PPS
?????
????? (??????)
2F USHR/LPS
USHR
??? SHR
LPS/MSP
2F BSHR/PPS
?????
PPS
2F BSHR/LPS
?????
????? (??????)
BSHR
LPS/MSP
4F BSHR/LPS
64
? ?????????
11????
A
F
B
C
E
D
65
? ?????????
11????
11 SNC-P?????????????????,???21???,??APS????????
??,???????30ms
A
F
B
C
E
D
66
? 4????????
11
A
F
B
C
E
D
67
? 4????????
11
????,?????? (Loopback switch)
A
F
B
C
E
D
68
? 4????????
11
??????,?????? (Span switch)
A
F
B
C
E
D
69
? 4????????
11
????,?????? ????
A
F
B
C
E
D
70
? 2????????
11
A
F
B
E
C
?? ??
???? ??
D
71
? 2????????
11
????,?????? (Loopback switch)
A
F
B
C
E
D
72
? 11??????
1. 2F?????4F????????11??,
??????APS??,???????? ?????????????????
2. ??APS????????????????
????????????????,?? ????????????????

• ???????????,??????????
• ????Switch Exercise ??????????
• ?????(????,????)??????
• ?,?????????

73
SDH????

• ? ? ? ?

74
??? SSM(Synchronization Status Message??????) ?

• ??
• Various traffics such as voice, data, video
• Multiple services such as IP, ATM, SDH.
• Different synchronization quality level would be
  realized over same network.
• More QoS required
• Supplying more suitable synchronization source to
  each NE is much more important
• ??? SSM
• Defined in ITU-T G.781
• SSM offers the quality level and priority level
  of synchronization source to each NE in order to
  assure clock quality.
• Indicated on San (n48) bits on external 2Mbit/s
  signal or S1 byte (b5b8 bit) on STM-N line
  signal.

Synchronization Architecture
MSBMost Significant Bit LSBLeast Significant
Bit SSUSynchronization Supply Unit
75
?????
SDH???S1??(5-8) ???? 2Mbit/s signal San
(n4-8) ?? ?????Q??????SSM??,?????????,??????? ??
????????,?????????????????,?????? ????????????????
Q??S1???????????
(2)
(4)
(8)
(11)
(15)
76
?????
??????
(1) ?????
(2) STM-N ???????
(3) 2M PDH????
????(holdover)
(4) ????
?????? (free-run)
External in
External out
(from BITS)
(to BITS)
1
2
1
2
STM-N
Line1
STM-N
line2
Tributary 1
2
line3
holdover
free run
STM-N
77
?????

• ?????????,??????
• ?????????????????

?????
Data
NE
NE
CLK1
CLK2

• ????

• ????

78
?????

• ????????????
• ????????????

?????
NE Slave
DataClock
NE Master
CLK1
79
?????
?????
DataClock
NE
NE
CLK1
CLK2
????? ?????????,???????????????????????
?????,???????,?????????????????????, ??slips?
????????,?????????,????????????????????????????
80
?????
?????
Data
Network
Network
Atomic CLK
Atomic CLK
81
?????
???????
1??????????Q??????
2????????????,??????P??????
3?????????Q??6,????S1???
4?????S1?????6,?????????
82
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
A
B
D
C
(G.812)
TRB1 Q3 P3
TRB 2 Q3 P4
83
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
Q5,P3
A
Q5,P3
B
D
Q5,P3
C
Q5,P2
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
84
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
A
B
D
C
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
85
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
Q6,P1
A
B
D
Q5,P3
C
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
86
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
Q6,P1
A
B
D
C
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
87
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
Q2,P2
Q6,P1
A
B
D
C
Q3,P1
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
88
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
Q2,P2
Q6,P15
Q6,P1
A
B
D
C
Q2,P2
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
89
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
A
B
D
C
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
90
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
A
B
D
C
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
91
?????
??????
EXT 1 Q2 P1
EXT 2 Q2 P2
(G.811)
A
B
D
C
(G.812)
TRB 1 Q3 P3
TRB 2 Q3 P4
92
????!